Index of this page
Voyage MPD —-Linux Music Environment For The Best Audio Performance—-
How to install and setup Voyage MPD
- What you need before Voyage MPD installation
- Full description of the installation operation for Voyage MPD
- Initial setup for Voyage MPD
- Setup Japanese environment
- Setup MPD
Operational Tips for Voyage MPD
- How to create bootable USB memory of Voyage MPD
- Control MPD by using Keypad board
- Auto Login method
- Multi Boot(GRUB2)
Update Voyage MPD for the best audio performance
- Build OSS from source code
- Build the latest version of Alsa (1.24)
- Build the MPD latest version (0.17.0)
Tuning Patches for MPD by yan
- Tuning Patches for MPD by yan
- Compiled binaries of MPD appling Tuning Patches by yan
- Latest compiled binaries of MPD appling Tuning Patches by yan
- MPD tuning patches readme.txt by yan
Best Tuning Tips for Voyage MPD
- Play MPD from memory file
- Setup grub parameters for tuning
- NAS tuning setup
- Setup tuning parameters of Linux
- How to setup prioty for Voyage MPD
Extra Tips for Voyage MPD
All contents are based on the Voyage MPD v0.7 20110208 version.
Extra edition
- MPD on SheevaPlug
- mpodjacket.rb by yan for MPoD and MPaD
- Voyage MPD v0.75 with latest Linux Kernel
- Voyage MPD v0.75 with Linux 3.0 + RT patches
- Download Linux 3.0.9 Kernel with rt25 patches for Voyage MPD
- Voyage MPD v0.75 Kernel config tuned for Atom
- Download Linux 3.0.9 Kernel tuned for Atom
- MPD on Cubox
Comments
How to install and setup Voyage MPD
“Voyage MPD” is an audio dedicated system in Linux environment. Followings are links about “Voyage MPD”.
What you need to install "Voyage MPD"
- PC to play music
As performance is not required, a used PC is sufficient.
Music-only PC is better and must be as quiet as possible.
I used Barebone PC built-in Atom(Shuttle X-27D). English keyboard will be must-be not to become nervous breakdown.
This is PFU HappyHacking keyboard. It is completely UNIX specification. no extra keys such as function keys, [tab] key is large and [ctrl] key is left center. It is very useful in Linux.
- Audio device suppoted by ALSA
You can check from here to know whether Alsa supports yor device.
I use PhazeTech HD-7A(USB Audio interface 1.1).
Devices with standard USB interface are recommended. - Disk to install Voyage MPD
You had better use a dedicated disk to avoid trouble. Installed disk size of Voyage MPD is about 250MB, therefore you can use USB memory if your PC bios supports USB boot. - Download ISO Image file(Live CD)
Download Live CD(snapshot version) from the site of Voyage MPD.
You can use tar ball to install Voyage MPD. In this case you must have another linux environment or live CD to install from tar ball. - Create Bootable CD(burn ISO image file to CD)
Create Bootable CD by using downloaded Live CD. You can find the way to burn by internet search. I used ImgBurn.
Full description of the installation operation for Voyage MPD
To clarify the operation(reply or command), quote portion color is red.
Boot from CDROM(Live CD).
Login
login as: root #[reply] root@192.168.0.13's password: #[reply]
Login name is “root” and password is “voyage”.
Linux voyage 2.6.33.7-rt29-voyage #1 SMP PREEMPT RT Sun Dec 26 04:17:30 GMT 2010 i686
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
__ __
\ \/ /___ __ __ ___ ___ ___ Useful Commands:
\ // _ \\ \/ /,-_ |/ _ |/ -_) remountrw - mount disk as read-write
\/ \___/ \ / \___,\_ |\___| remountro - mount disk as read-only
_/_/ _'_| remove.docs - remove all docs and manpages
{ V o y a g e } - L i n u x
< http://linux.voyage.hk > Version: 0.7 (Build Date 20110208)
Set up install directory
root@voyage:~# mkdir /tmp/root /tmp/cf #[command] root@voyage:~# mount -o loop /live/image/live/filesystem.squashfs /tmp/root #[command] root@voyage:~# cd /tmp/root #[command]
Make directories for temporary root, mount point and mount loop.
When you operate properly, “Run silent” that is UNIX-like fashion.
It looks a little difficult to type “/live/image/live/filesystem.squashfs” but it is easy by using completion of the input such as “/liv[tab]i[tab]l[tab]f[tab]s[tab]”.
Confirm the condition of install disk
To confirm install disk, “fdisk -l”.
root@voyage:/tmp/root# fdisk -l #[command] Disk /dev/sda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x61dc4b11 Device Boot Start End Blocks Id System /dev/sda1 * 1 5099 40957189 83 Linux /dev/sda2 5100 9730 37192705 5 Extended /dev/sda5 5100 9534 35619840 83 Linux /dev/sda6 9534 9730 1571840 82 Linux swap / Solaris Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe52229e8 Device Boot Start End Blocks Id System /dev/sdb1 * 1 182401 1465136032 83 Linux
“/dev/sda1” is the target partion to install Voyage MPD. “/dev/sdb1” is the music disk connected with USB. In this case there is no need to create a partion. Here is a reference to create a partion.
Create a partion
root@voyage:/tmp/root# fdisk /dev/sda #[command]
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): d #[reply]
Partition number (1-6): 1 #[reply]
Command (m for help): w #[reply]
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
“d” is to delete the 1st partion. “w” is a running command to delete. Please be careful, because if you mistake here, all contents in your disk will be lost.
root@voyage:/tmp/root# fdisk /dev/sda #[command]
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Again run “fdisk” to create a new partion.
You can do this easy bt history function of bash. Use upper arrow key.
Command (m for help): n #[reply]
Command action
l logical (5 or over)
p primary partition (1-4)
p #[reply]
Partition number (1-4): 1 #[reply]
First cylinder (1-9729, default 1): #[reply]
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-5099, default 5099): #[reply]
Using default value 5099
Command (m for help): w #[reply]
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
“n” is to create a new partion. “w” is a running command to create.
Format(create File system)
“mkfs.ext2” is a command to dormat for ext2 file system.
root@voyage:/tmp/root# mkfs.ext2 /dev/sda1 #[command] mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 2564096 inodes, 10239421 blocks 511971 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=0 313 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: ....7962624 Writing inode tables: ...0/313 done Writing superblocks and filesystem accounting information: #[reply]
Maybe it will proceed next automatically when time is over.
done This filesystem will be automatically checked every 25 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
“tune2fs” is a command to setup parmeters for ext2 file system.
root@voyage:/tmp/root# tune2fs -c 0 /dev/sda1 #[command] tune2fs 1.41.12 (17-May-2010) Setting maximal mount count to -1
Set 0 which means “checkless”.
Preparation for installation has been completed. Let’s start instalation.
Set Conditions for Installation
root@voyage:/tmp/root# /usr/local/sbin/voyage.update #[command]
What would you like to do?
1 - Create new Voyage Linux disk
2 - Update existing Voyage configuration
3 - Exit
(default=1 [Create new Voyage Linux disk]): #[reply]
OK by default, “enter”.
some mandatory options are unset, please enter them interactively Where is the Voyage Linux distribution directory? (default=/tmp/root): #[reply]
You may be confused as suddenly prompt appear. This is “1 - Specify Distribution Directory” in the menu following.
OK by default, “enter”.
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=2 [Select Target Profile]): #[reply]
Move next menu(Select Target Profile). OK by default, “enter”.
Please select Voyage profile:
1 - 4501
2 - 4511/4521
3 - 4801
4 - 5501
5 - ALIX
6 - Generic PC
7 - Notebook (pcmcia)
8 - WRAP
(default=5 [ALIX]): 6 #[reply]
Select 6. Menu No.7(Notebook) means to use pcmcia, therefore if you do not use pcmcia select 6(Generic PC).
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=3 [Select Target Disk]): #[reply]
Move menu No.3. OK by default, “enter”.
Partitions information major minor #blocks name 8 0 78150744 sda 8 1 40957686 sda1 8 2 1 sda2 8 5 35619840 sda5 8 6 1571840 sda6 7 0 63712 loop0 7 1 63712 loop1 8 16 1465138584 sdb 8 17 1465136032 sdb1 Which device accesses the target disk [/dev/hde]? /dev/sda #[reply]
This is very important. you must be careful. If you mistake, it will be disastrous.
Select “/dev/sda”.
Which partition should I use on /dev/sdc for the Voyage system [1]? #[reply]
Partion No. is “1”.
Where can I mount the target disk [/tmp/cf]? #[reply]
Mount point is “/tmp/cf” which you have already created. Therefore OK by default, “enter”.
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=4 [Select Target Bootstrap Loader]): #[reply]
Move menu No.4. OK by default, “enter”.
Which loader do you want (grub or lilo) [grub]? #[reply] Which partition is used for bootstrap [1]? #[reply]
OK by default, “enter”.
You must know Linux boot loader’s detail to select except “1” partition.
It is safe slecting “1” here.
If there is inconvenience to select “1”, you can change it later.
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=5 [Configure Target Console]): #[reply]
Move menu No.5. OK by default, “enter”.
Select terminal type:
1 - Serial Terminal
2 - Console Interface
(default=2 [Console Interface]): #[reply]
OK by default, “enter”.
“1 - Serial Terminal” is for Embedded Hardware such as alix machine.
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=6 [Partition and Create Filesystem]): #[reply]
Move menu No.5. OK by default, only “enter” operation.
What shall I do with your Flash Media?
1 - Partition Flash Media and Create Filesystem
2 - Use Flash Media as-is
(default=1 [Partition Flash Media and Create Filesystem]): 2 #[reply]
You had better to select “2 - Use Flash Media as-is” because “1 - Partition Flash Media and Create Filesystem” is a little unstable.
You have created file system already by “ext2fs”and “tune2fs” copmmands. Therefore Ok by selecting 2.
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=7 [Copy Distribution to Target]): #[reply]
You have completed to select install parameters. Move to menu No.7(not exists), OK by default, “enter”.
Configuration details: ---------------------- Distribution directory: /tmp/root Disk/Flash Device: /dev/sda Installation Partition: /dev/sda1 Bootstrap Partition: /dev/sda1 Will be mounted on: /tmp/cf Target system profile: Generic PC Target console: standard Bootstrap installer: grub Bootstrap partition: /dev/sda1 OK to continue (y/n)? y #[reply]
Final confirmatiom. “y” to run.
Run installation
Ready to go ....
Copying files .... done
Removing pcmcia from update-rc.d
update-rc.d: using dependency based boot sequencing
Removing dnsmasq.pxe.conf in /etc/dnsmasq.more.conf
Reconfiguring resolvconf
Installing grub
Copy grub files from /tmp/cf to /tmp/cf/boot/grub
Setting up grub under chroot /tmp/cf
copyfiles.sh script completed
What would you like to do?
1 - Specify Distribution Directory
2 - Select Target Profile
3 - Select Target Disk
4 - Select Target Bootstrap Loader
5 - Configure Target Console
6 - Partition and Create Filesystem
(default=8 [Exit]): #[reply]
Installation has been completed. Enter to finish script.
/usr/local/sbin/voyage-install.sh: .voyage-install.conf: Read-only file system /usr/local/sbin/voyage-install.sh: test.conf: Read-only file system root@voyage:/tmp/root# reboot #[command]
Reboot system. You must change PC Bios to reboot from hard disk.
Initial setup for Voyage MPD
You had better setup Voyage Mpd here to use and tune it smoothly.
root@voyage:~# remountrw #[command]
“remountrw” is a Voyage’s shell command to change disk drive writtable.
It is a little troublesome to run it every time you start Voyage, therefore you had better set it in .bashrc.
Change password
Change password as soon as possible to ensure your security.
root@voyage:~# passwd #[command] Enter new UNIX password: #[reply] Retype new UNIX password: #[reply] passwd: password updated successfully
Update and Upgrade
These are established tactics in Linux. You should update and upgrade Voyage MPD.
Use apt-get(Debian package management tool).
root@voyage:~# apt-get update #[command] 0% [Working] Get:11 http://ftp.jp.debian.org squeeze/contrib i386 Packages [54.8 kB] root@voyage:~# apt-get upgrade #[command] Reading package lists... 0%...... Reading state information... Done The following packages will be upgraded: apt apt-utils cron dash initramfs-tools libdbus-1-3 libgssapi-krb5-2 libk5crypto3 libkrb5-3 libkrb5support0 libxi6 lilo netbase 13 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 3928 kB of archives. After this operation, 16.4 kB of additional disk space will be used. Do you want to continue [Y/n]? y #[reply]
Reply “yes”.
0% [Working]......
Reply “OK” to the GUI of LILO configuration.
Set Japanese Time
root@voyage:~# dpkg-reconfigure tzdata #[command]
Set Japanese time if you live in Japan. Following GUI guidance, Specify Asia and Tokyo.
Current default time zone: 'Asia/Tokyo' Local time is now: Sun Jan 2 09:50:20 JST 2011. Universal Time is now: Sun Jan 2 00:50:20 UTC 2011.
Edit .bashrc
“.bashrc” is a shell script file that runs when you login.
You had better edit it to run remountrw and alias.
root@voyage:~# vi ./.bashrc #[command]
This is initial contents of .bashrc.
remountrw alias mpdr='/etc/init.d/mpd stop;/etc/init.d/mpd start-create-db' alias mpcs='mpc update;mpc listall|mpc add;mpc play'
Edit like this.
You can edit this easy by using ssh(such as PuTTy) and copy&paste function in Windows.
Fix IP address
root@voyage:~# vi /etc/network/interfaces #[command]
Next fix your IP address. “/etc/network/interfaces” will be able to type “e[tab]ne[tab]/in[tab]”.
Edit as following.
iface eth0 inet static
address 192.168.0.31
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
dns-nameservers 192.168.0.1
You can edit this easy by copy&paste function.
Power off by PC’s power off buttom
Install acpid and edit new file named power.
root@voyage:~# apt-get install acpid #[command] ・・・ root@voyage:~# emacs /etc/acpi/events/power #[command] event=button/power (PWR.||PBTN) action=/sbin/poweroff
Edit grub information
To use Japanese console, flame buffer should be effective.
Recent Voyage MPD decides display size automatically. It is a little inconvenient in a large size display because character are too small.
This is a modification corresponding to this.
root@voyage:~# vi /boot/grub/menu.lst #[command]
Change as following.
Add “nomodeset vga=788” to the kernel line.
Setup Japanese environment
Setup Japanese keyboads
You had better install this if you disk space affords because this setting will help keymap.
You must add Japanese Debian server to “/etc/apt/sources.list”.
root@voyage:~# vi /etc/apt/sources.list #[command]
Add Japanese Debian server.
root@voyage:~# apt-get install dialog #[command]
Install “dialog”.
Reading package lists... 0%..... Unpacking dialog (from .../dialog_1.1-20100428-1_i386.deb) ... Setting up dialog (1.1-20100428-1) ...
Finally install Japanese keyboard.
root@voyage:~# apt-get install console-common console-data #[command] Reading package lists... 0%..... Suggested packages: unicode-data The following NEW packages will be installed: console-common console-data kbd 0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded. Need to get 1712 kB of archives. After this operation, 6142 kB of additional disk space will be used. Do you want to continue [Y/n]? y #[reply]
Reply “yes”
0% [Working]....
Select keymap from arch list (Note default is "don't touch keymap") #[reply]
qwerty (default) #[reply]
Japanese #[reply]
Of course if you are none Japanese, select appropriate keyboard.
Unpacking console-data (from .../console-data_2%3a1.10-8_all.deb) ... Selecting previously deselected package kbd. Unpacking kbd (from .../archives/kbd_1.15.2-2_i386.deb) ... update-rc.d: using dependency based boot sequencing Selecting previously deselected package console-common. Unpacking console-common (from .../console-common_0.7.85_all.deb) ... Setting up console-data (2:1.10-8) ... Looking for keymap to install: pc110 Setting up kbd (1.15.2-2) ... Setting console screen modes and fonts. Setting up console-common (0.7.85) ... Looking for keymap to install: pc110 unicode_stop skipped on not a tty root@voyage:~#
Installation ha been completed.
Install emacs
Install emacs here if you want to “adios muchachos vi”. It take a little time but you will be happy after this.
root@voyage:~# apt-get install emacs #[command] ・・・・ Unpacking emacs (from .../emacs_23.2+1-7_all.deb) ... Setting up emacs (23.2+1-7) ...
Install locale
Install locale to complete Japanese environment.
root@voyage:~# apt-get install locales #[command] ・・・ Setting up locales (2.11.2-7) ... Generating locales (this might take a while)... Generation complete.
Setup locale.
root@voyage:~# dpkg-reconfigure locales #[command]
Select ja_JP.UTF-8 UTF-8 by space key. Move to OK by using Tab and Enter. Of course you must select an adequate languege depending to your environment.
This guidance message is in Jpanese. Of course it must be in English for the first time.
Generating locales (this might take a while)... ja_JP.UTF-8... done Generation complete.
Install Mule-UCS to use Unicode(UTF-8) in Emacs.
root@voyage:~# apt-get install mule-usc #[command] ・・・ E: Unable to locate package mule-usc
Mule-UCS has been already installed.
Install Japanese console(jfbterm)
root@voyage:~# apt-get install jfbterm #[command]
Reboot to activate Japanese Environment.
root@voyage:~# reboot #[command]
Setup MPD
From here it is assumed that the music data are in Windows server(ntfs format, IP address 192.168.0.3).
Mount Windows server
Add the following line to /etc/fstab.
root@voyage:~# emacs /etc/fstab #[command] //192.168.0.3/cd2 /music1 cifs username=yo,password=,uid=root,file_mode=0644,dir_mode=0755,iocharset=utf8 0 0
“iocharset=utf8” is needed for Japanese title in music files and directories.
Mount it.
root@voyage:~# mount -a #[command]
Setup music directory
root@voyage:~# mkdir /music /music1 #[command] root@voyage:~# chmod -R 777 /music #[command] root@voyage:~# mkdir /music/playlists #[command] root@voyage:~# ln -s /music1 /musicic #[command]
Confirm music devices
root@voyage:~# cat /proc/asound/cards #[command]
0 [IXP ]: ATIIXP - ATI IXP
ATI IXP rev 1 with AD1981B at 0xe8004400, irq 11
1 [default ]: USB-Audio - USB Audio CODEC
Burr-Brown from TI USB Audio CODEC at usb-0000:00:13.0-3, full s
2 [Modem ]: ATIIXP-MODEM - ATI IXP Modem
ATI IXP Modem rev 1 at 0xe8004800, irq 11
Two Audio devices are found except USB-Audio devise. You must fix the USB-Audio devise number.
I will explain later how to fix alsa’s audio device number.
Here edit /etc/mpd.conf to adjust it.
Edit mpd.conf
root@voyage:~# emacs /etc/mpd.conf #[command]
Lines to edit are little. Only snap shots.
Change music directory to /music and playlists directory to /music/playlists.
Comment out localhost.
Adjust device number of Alsa to “1”.
root@voyage:~# /etc/init.d/mpd restart #[command] Stopping Music Player Daemon: mpd. Starting Music Player Daemon: mpdlisten: bind to '0.0.0.0:6600' failed: Address already in use (continuing anyway, because binding to '[::]:6600' succeeded).
Warning means IPV6 error. Neglect it.
Run mpc.
root@voyage:~# mpc update #[command] Updating DB (#1) ... volume:100% repeat: off random: off single: off consume: off root@voyage:~# mpc listall|mpc add #[command]
mpc play.
root@voyage:~# mpc play #[command] BIS Sampler 1992/01__Malmo_Symphony_Orchestra_&_Chorus,_James_DePreist,_Inger_Blom_-_Es_geschah..._Faust_Cantata_(Seid_nuchtern_und_wachet).wav [playing] #1/17 0:00/5:19 (0%) volume:100% repeat: off random: off single: off consume: off
Stop music.
root@voyage:~# mpc stop #[command] volume:100% repeat: off random: off single: off consume: off
Fix Alsa’s device number
I am not sure the following opration is correct. But it works well in my environment.
root@voyage:~# emacs /etc/modprobe.d/alsa-base.conf #[command]
options snd-atiixp-modem index=2 options snd-usb-audio index=1
Change index value to 2 and 1.
(PC_Audio) Comments
Operational Tips for Voyage MPD
How to create bootable USB memory of Voyage MPD
Use boot loader “SYSLINUX”, write it to MBR of USB memory stick and make it bootable.
Copy necessary files for boot to USB memory from Voyage MPD ISO image
The concrete steps are as follows:
- Format USB memory to FAT32
- You can do it in Windows explorer.
- Download SYSLINUX
- From the site SYSLINUX -> Download -> kernel.org. Download syslinux-4.03.zip.
- Write boot loader(SYSLINUX) to USB memory
- “syslinux -ma i” in Windows command prompt
- Copy files from Voyage MPD ISO image to USB memory
- Copy whole contents in \isolinux to root in USB memory. Directory-copy \live to root in USB memory.
- Change Settings(isolinux.cfg) to be able to boot as SYSLINUX
- Rename isolinux.cfg in root to syslinux.cfg(config of SYSLINUX). Open renamed syslinux.cfg with the editor that can handle UNIX file format. There is a line “default /isolinux/vesamenu.c32”. Edit it “default vesamenu.c32” (for matching directory structure).
- Boot from USB memory
- Change your bios to boot from USB drive and reboot.
To be exact you must edit exthelp.cfg. But if you do not use help at all, so omit it.
About SYSLINUX, this page is very useful.
Control MPD by Keypad board
This is a picture of Keypad board I use. Don’t you think it can be used as remote controller.
Followings are the commands of mpc(program to control Voyage MPD) related with playing music.
mpc play mpc next mpc prev mpc toggle(mpc pause) mpc stop mpc play nn(number)
Edit mykey.
root@voyage:~# emacs /etc/mykey string F78 = "mpc toggle\n" keycode 78 = F78 string F74 = "mpc stop\n" keycode 74 = F74 string F98 = "mpc prev\n" keycode 98 = F98 string F55 = "mpc next\n" keycode 55 = F55 string F83 = "mpc play " keycode 83 = F83
If mykey is a new file, edit rc.local to run it for next boot.
root@voyage:~# emacs /etc/rc.local
add next line before “exit 0”.
/usr/bin/loadkeys /etc/mykey
Auto Login method
To use Keypad board, you must login Voyage MPD. Here is a method to login automatically.
root@voyage:~# adduser hoge
Regist new user name and password.
Delete password.
root@voyage:~# emacs /etc/shadow
In the last line
hoge:$6$imU2OaTj$dxDNTiaPFFF2sbvjpNS99MJk1CbSOcf2cf2pJbRxi3wTiE5kytHQXYRdnGm0.p0zAnUcxJSkZXgHQgM\WhTFX0:14995:0:99999:7:::
edit it like this.
hoge::14995:0:99999:7:::
save the file.
root@voyage:~# emacs /etc/inittab
For automatic login tty1, edit inittab. Toward the end part
1:2345:respawn:/sbin/getty 38400 tty1
Search the line above. Comment out. Add the following lineand save.
#1:2345:respawn:/sbin/getty 38400 tty1 1:2345:respawn:/bin/login hoge /dev/tty1 2>/dev/tty1
Of course “hoge” is secret language of hackers, change it appropriate name.
“reboot” or “loadkeys /etc/mykey”. You can use Keypad board to control MPD.
Multi Boot(GRUB2)
This is a little risky. If you fail, you will lost valuable data and your system can not boot. Try it at your own risk.
Most of recent Linux distribution use GRUB2(v1.98 or later). But Voyage use legacy GRUB(grub-legacy v0.97). The reason why Voyage One apply grub-legacy is that they are used for embedded system.
Therefore if you want to multiboot, it cannot work well. You must edit menu.lst directly.
But recent Voyage MPD version can install GRUB2.
root@voyage:~# apt-get update #[command] ・・・ root@voyage:~# apt-get upgrade #[command] ・・・
Start install GRUB2.
root@voyage:~# apt-get install grub Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: grub-pc Suggested packages: desktop-base The following packages will be REMOVED: grub-legacy The following NEW packages will be installed: grub grub-pc 0 upgraded, 2 newly installed, 1 to remove and 0 not upgraded. Need to get 1139 kB of archives. After this operation, 1896 kB of additional disk space will be used. Do you want to continue [Y/n]? y #[reply]
Reply “y(yes)”
Get:1 http://ftp.tw.debian.org/debian/ squeeze/main grub-pc i386 1.98+20100804-13 [1021 kB] Get:2 http://ftp.tw.debian.org/debian/ squeeze/main grub i386 0.97-64 [118 kB] Fetched 1139 kB in 1s (578 kB/s) Preconfiguring packages ...
Reply “OK”
As /etc/default/grub does not exits, there is no message.
Reply “OK”.
Reply “OK”.
You can view this dialog only when you have over 2 active hard disks.
GRUB2 ask you which hard disk you use to boot. Select your choice.
(Reading database ... 12823 files and directories currently installed.) Removing grub-legacy ... Selecting previously deselected package grub-pc. (Reading database ... 12777 files and directories currently installed.) Unpacking grub-pc (from .../grub-pc_1.98+20100804-13_i386.deb) ... Selecting previously deselected package grub. Unpacking grub (from .../archives/grub_0.97-64_i386.deb) ... Setting up grub-pc (1.98+20100804-13) ... Creating config file /etc/default/grub with new version Installation finished. No error reported.
Installation has finished.
Generating grub.cfg ... Found linux image: /boot/vmlinuz-2.6.33.7-rt29-voyage Found initrd image: /boot/initrd.img-2.6.33.7-rt29-voyage done Setting up grub (0.97-64) ...
Maybe it means old settings are transfered to grub.cfg. But I am not sure.
If you are an Alix user you must setup GRUB_DEFAULT. Please refer to Mr. Shin blog more.
root@voyage:~# reboot
Reboot to confirm GRUB2 update.
You must install os-prober for multiboot. “os-prober” is a program to seach installed system and tell them to grub.
root@voyage:~# apt-get install os-prober #[command] Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: os-prober 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 23.8 kB of archives. After this operation, 188 kB of additional disk space will be used. Get:1 http://ftp.tw.debian.org/debian/ squeeze/main os-prober i386 1.42 [23.8 kB] 100% [Working] Fetched 23.8 kB in 0s (58.5 kB/s) Selecting previously deselected package os-prober. ・・・ (Reading database ... 13009 files and directories currently installed.) Unpacking os-prober (from .../os-prober_1.42_i386.deb) ... Setting up os-prober (1.42) ...
Search
root@voyage:~# os-prober #[command] /dev/sda1:Windows 7 (loader):Windows:chain /dev/sdb1:Debian GNU/Linux (squeeze/sid):Debian:linux /dev/sdb5:Ubuntu 10.10 (10.10):Ubuntu:linux
“os-prober” displays Installed OS and updates GRUB information(grub.cfg).
root@voyage:~# update-grub #[command] Generating grub.cfg ... Found linux image: /boot/vmlinuz-2.6.33.7-rt29-voyage Found initrd image: /boot/initrd.img-2.6.33.7-rt29-voyage Found Windows 7 (loader) on /dev/sda1 Found Debian GNU/Linux (squeeze/sid) on /dev/sdb1 Found Ubuntu 10.10 (10.10) on /dev/sdb5 done
Reboot your sytem. Confirm multiple boot.
(PC_Audio) Comments
Update Voyage MPD for the best audio performance
build OSS from source code
This is very effective to tune up MPD’s audio performance.
You must prepare packages, download source code and build for yourself, therefore it is a bit difficult, but is recommended.
Reference Link is here.
Install packages necessary to build OSS
root@voyage:~# apt-get install -y binutils libgtk2.0-0 sed gcc libc6 root@voyage:~# apt-get install -y build-essential linux-headers-`uname -r` gawk libtool libgtk2.0-dev root@voyage:~# apt-get install -y libesd0 libsdl1.2debian-oss
1st and 2nd line is required. I am not sure 3rd line is requisite but I think they do not disturb.
“/etc/apt/sources.list” is as following.
# /etc/apt/sources.list deb http://ftp.tw.debian.org/debian/ squeeze main contrib deb http://ftp.jp.debian.org/debian/ squeeze main contrib deb http://security.debian.org/ squeeze/updates main contrib deb http://www.voyage.hk/dists/experimental/ ./
I think last line is not needed(not confirmed).
Download OSS source code
root@voyage:~# apt-get install -y mercurial root@voyage:~# cd /opt root@voyage:/opt# hg clone http://opensound.hg.sourceforge.net:8000/hgroot/opensound/opensound oss-devel
In the referremce Link there is a description about recent testing tar bar but I neglect it because experimental version is not needed.
Make a directory to build
root@voyage:~# cd ~/ root@voyage:~# rm -rf oss42build root@voyage:~# mkdir oss42build root@voyage:~# cd oss42build/
“rm -rf” is not needed for the first time.
Build OSS (configure and make)
root@voyage:~/oss42build# NO_WARNING_CHECKS=yes /opt/oss-devel/configure --enable-libsalsa=NO root@voyage:~/oss42build# make root@voyage:~/oss42build# make deb
Quite time consuming. Especially, “make” takes 10 minutes in my environment.
Install OSS
root@voyage:~/oss42build# ls -l ./ root@voyage:~/oss42build# mv ./oss-linux-4.2-2004_i386.deb ../ root@voyage:~/oss42build# cd .. root@voyage:~# ln -s /usr/src/linux-headers-`uname -r` /lib/modules/`uname -r`/build root@voyage:~# dpkg -i oss-linux-4.2-2004_i386.deb root@voyage:~# dpkg-reconfigure linux-sound-base
“ls” command is to confirm oss-linux-4.2-2004_i386.deb is build. “cd”s command are not necessary to install but you had better do them if you change OSS and Alsa frequently.
Finally following dialog will appear
Select OSS and move OK by using “tab” and enter.
Confirm OSS operation, Setup MPD and reboot
root@voyage:~# ossinfo
root@voyage:~# osstest
root@voyage:~# emacs /etc/mpd.conf
audio_output {
type "oss"
name "My OSS Device"
device "/dev/dsp0" # optional
# format "44100:16:2" # optional
# mixer_device "/dev/mixer" # optional
# mixer_control "PCM" # optional
}
root@voyage:~# reboot
If osstest end after an error, surely there is no sound.
The information to fix this problem is here and here(These articles are in 4Front forum).
The method in the information means to end normal when device doed not accept sample rate assignment.
About how to change source code of ossusb_audio.c, descriptions are in the 2nd Link. “return 1;” must be added immediately after function definition of “write_control_value”. And ossusb_audio.c is in /opt/oss-devel/kernel/drv/oss_usb/ossusb_audio.c.
Of cource you should edit this change before configure.
You had better comment out Alsa’s “audio_output” in mpd.conf.
[device “/dev/dsp0”] must match ossinfo information.
Back to Alas
Comment in Alsa’s “audio_output” and comment out OSS’s “audio_output” in mpd.conf.
root@voyage:~# apt-get remove oss-linux root@voyage:~# dpkg-reconfigure linux-sound-base root@voyage:~# reboot
In my Atom environment package size become such as below.
-rw-r--r-- 1 root root 2182980 2011-02-07 21:23 oss-linux-4.2-2004_i386.deb build version -rw-r--r-- 1 root root 2460804 2011-01-06 03:10 oss-linux-4.2-2004_i386.deb download version
Build version is smaller than download version by 270KB. I think this means much for audio performance.
Build the latest version of Alsa (1.24)
I referred to the following links.
Install basic libraries for Alsa
root@voyage:~# apt-get install aptitude wget root@voyage:~# aptitude install build-essential libncurses-dev gettext xmlto xmltoman linux-headers-`uname -r`
Download driver source and expand
root@voyage:~# mkdir -p Alsa root@voyage:~# cd ./Alsa/ root@voyage:~/Alsa# wget ftp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.24.tar.bz2 root@voyage:~/Alsa# cd alsa-driver-1.0.24/ root@voyage:~/Alsa# tar xjvf alsa-driver-1.0.24.tar.bz2
Advance preparation to build driver
root@voyage:~/Alsa/alsa-driver-1.0.24# pkill mpd root@voyage:~/Alsa/alsa-driver-1.0.24# apt-get remove alsa-base
Build driver
Build usb-audio only and not include unnecessary features.
root@voyage:~/Alsa/alsa-driver-1.0.24# CFLAGS="-O2 -mtune=`uname -m`" ./configure --with-cards=usb-audio --with-sequencer=no --with-isapnp=no --with-kernel=/usr/src/linux-headers-$(uname -r) root@voyage:~/Alsa/alsa-driver-1.0.24# make root@voyage:~/Alsa/alsa-driver-1.0.24# make install root@voyage:~/Alsa/alsa-driver-1.0.24# reboot
Confirm Alsa is updated
root@voyage:~# cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.24. Compiled on May 7 2011 for kernel 2.6.33.7-rt29-voyage (SMP).
If you want to build libraries and utilities.
Download driver source code and expand root@voyage:~# cd Alsa/ root@voyage:~/Alsa# wget ftp://ftp.alsa-project.org/pub/lib/alsa-lib-1.0.24.1.tar.bz2 root@voyage:~/Alsa# wget ftp://ftp.alsa-project.org/pub/utils/alsa-utils-1.0.24.2.tar.bz2 root@voyage:~/Alsa# tar xjvf alsa-lib-1.0.24.1.tar.bz2 root@voyage:~/Alsa# tar xjvf alsa-utils-1.0.24.2.tar.bz2 Build libraries root@voyage:~/Alsa# cd ./alsa-lib-1.0.24.1/ root@voyage:~/Alsa/alsa-lib-1.0.24.1# ./configure root@voyage:~/Alsa/alsa-lib-1.0.24.1# make root@voyage:~/Alsa/alsa-lib-1.0.24.1# make install Build utilities root@voyage:~/Alsa/alsa-lib-1.0.24.1# cd ../alsa-utils-1.0.24.2 root@voyage:~/Alsa/alsa-utils-1.0.24.2# ln -s libpanelw.so.5 /usr/lib/libpanelw.so root@voyage:~/Alsa/alsa-utils-1.0.24.2# ln -s libformw.so.5 /usr/lib/libformw.so root@voyage:~/Alsa/alsa-utils-1.0.24.2# ln -s libmenuw.so.5 /usr/lib/libmenuw.so root@voyage:~/Alsa/alsa-utils-1.0.24.2# ln -s libncursesw.so.5 /lib/libncursesw.so root@voyage:~/Alsa/alsa-utils-1.0.24.2# ./configure root@voyage:~/Alsa/alsa-utils-1.0.24.2# make root@voyage:~/Alsa/alsa-utils-1.0.24.2# make install
Refer to the links about the meaning of “ln -s”.
Build the MPD latest version (0.17.0)
This tip has great effect but it is a little risky. Please try it at your own risk.
stop mpd
pkill mpd
Install basic libraries for MPD
apt-get install aptitude wget apt-get install git binutils gcc make subversion autoconf automake autotools-dev libtool pkg-config apt-get install build-essential libncurses5-dev libncursesw5-dev linux-headers-`uname -r` libglib2.0-dev
Install individual functional libraries for MPD
Select individual functional libraries that you need. Comment in necessary, comment out unnecessary line. Edit them as shell script and run it.
#apt-get install libmikmod2 libmikmod2-dev # disable modplug decoder plugin #apt-get install libfaad2 libfaad-dev # disable AAC(MP4/AAC) support (default: enable) apt-get install libflac8 libflac-dev # enable flac support (default: enable) apt-get install libogg0 libogg-dev libvorbis0a libvorbis-dev # enable Ogg Vorbis support (default: enable) apt-get install libid3tag0 libid3tag0-dev libmad0 libmad0-dev # enable id3 support (default: enable) apt-get install libcue-dev libcue1 # enable support for libcue(cue sheet) support apt-get install libasound2 libasound-dev libasound2-dev # enable ALSA support #aptitude install libpulse-dev libpulse0 libpulse-ocaml libpulse-browse0 libpulse-mainloop-glib0 # disable pulse support #aptitude install libjack-0.116 libjack-dev libjackson-json-java # disable jack support #aptitude install libgme0 libgme-dev # disable Blargg's game music emulator plugin(gme) #aptitude install sqlite3 libsqlite3-dev # disable sqlite #aptitude install libao-dev # disable ao #apt-get install libwavpack-dev libwavpack1 # disable WavPack support #apt-get install libmikmod2-dev libmikmod2 libmikmod-dev # disable the mikmod decoder (default: disable) apt-get install libsamplerate0 libsamplerate-dev # enable libsamplerate(sample rate) support apt-get install libshout-dev # enables the shoutcast streaming output apt-get install libavformat52 libavformat-dev libavcodec-dev libavcodec52 libavutil49 libavutil-dev # enable FFMPEG(mp3,ape etc) support apt-get install libaudiofile0 libaudiofile-dev # enable audiofile support (WAV and others) # apt-get install libsndfile-dev libsndfile1 # disable sndfile support #apt-get install libcdio-cdda0 libcdio-dev libcdio-paranoia0 libcdio10 libcdio-paranoia-dev # CDIO_PARANOIA aptitude install libcurl-dev libcurl4-openssl-dev # enable support for libcurl(CURL) HTTP streaming (default:auto) apt-get install libmms-dev libmms0 # enable the MMS protocol with libmms #apt-get install libtwolame-dev libtwolame0 # disable the TwoLAME mp2 encoder # LAME: http://debian-multimedia.org/pool/main/l/lame/lame.php disable libmad mp3 decoder plugin #wget http://debian-multimedia.org/pool/main/l/lame/libmp3lame0_3.98.4-0.0_i386.deb #wget http://debian-multimedia.org/pool/main/l/lame/libmp3lame-dev_3.98.4-0.0_i386.deb #dpkg -i libmp3lame0_3.98.4-0.0_i386.deb libmp3lame-dev_3.98.4-0.0_i386.deb apt-get install libavahi-client-dev libavahi-glib-dev # enable avahi, this line is required after voyage mpd v0.75
git latest version of MPD
git clone git://git.musicpd.org/master/mpd.git cd ./mpd
Create configure and configure and build
Automatically generate configure script
./autogen.sh
Edit following lines as shell script and run it.
emacs ./my-config #!/bin/sh ./configure \ --disable-bzip2 \ --disable-iso9660 \ --disable-zzip \ --enable-id3 \ --disable-sqlite \ --enable-ffmpeg \ --enable-alsa \ --disable-wave-encoder \ --enable-pipe-output \ --enable-httpd-output \ --disable-recorder-output \ --enable-sndfile \ --enable-oss \ --enable-shout \ --disable-pulse \ --disable-ao \ --disable-mad \ --disable-inotify \ --disable-ipv6 \ --enable-curl \ --disable-mms \ --disable-wavpack \ --disable-lame-encoder \ --disable-twolame-encoder \ --enable-vorbis \ --enable-lsr \ --enable-rtopt \ <-- This line is necessary for Tuning patches. Refer to the next article --with-zeroconf=auto \ CFLAGS="-O2 -mtune=`uname -m`" sh ./my-config
Minimize enable options. Disable ipv6 and sndfile.
Disable sndfile is very important if you use 24bit USB DAC or DDC because “enable” means no sound. Optimise option is O2.
Run make and make install.
make make install
Change MPD directory and start MPD
Change MPD directory
echo DAEMON=/usr/local/bin/mpd >>/etc/default/mpd /etc/init.d/mpd start
Confirm MPD 0.17.0 is running
mpc version
“mpc version” shows running MPD version.
If you want to build again another condition, run
make clean ./autogen.sh sh ./my-config make make install
You can confirm configure’s default “./mpd/configure –help”.
Back to the original
root@voyage:~# pkill mpd root@voyage:~# emacs /etc/default/mpd #DAEMON=/usr/local/bin/mpd root@voyage:~# /etc/init.d/mpd start
(PC_Audio) Comments
Tuning Patches for MPD by yan
Tuning Patches for MPD by yan
If you try the following patch, please do it all at your own risk. There are no warranties about the following patches.
Copyright policy of this patch is same as MPD.
Download Tuning Patch for MPD (mpd-rtopt-110605.tgz) by yan
Download Tuning Patch update for MPD (mpd-0.17-1123-rtopt.diff.gz) by yan
This parch is for git from 201111 to 201202.
Download Tuning Patch update for MPD (mpd-0.17git-20120226rtopt.diff.gz) by yan
This parch is for mpd-0.17.1(stable) and git from 201202 to 201207.
Download Tuning Patch update for MPD (mpd-0.17git-20120819rtopt.diff.gz) by yan
This parch is for git(0.18) from 201208.
- Tuning Patches for MPD
- These patches are to add realtime_option for MPD-0.17git or MPD-0.16.2. To improve MPD audio quality, these patches are intended to manage per-thread priority in RT(realtime) kernel and to allocate real memory to MPD’s virtual space. You can configure MPD’s thread scheduling priority and real memory allocation by editing /etc/mpd.conf.
Tuning Patch update is for current(november 2011) git version.
These patches are for MPD version 0.17.0 or 0.16.2 and for Linux RT kernel (major taget is Voyage MPD). The latest MPD’s version of Voyage MPD is 0.16.0. Therefore, applying these patches, you must update MPD to version 0.17.0 or 0.16.2.
Refer to the article before Build MPD latest version (0.17.0) how to build MPD.
You must do
- “Install basic libraries for MPD”
- “Install individual functional libraries for MPD”
- “git latest version of MPD”
before you patch mpd.
Run following commands in the MPD’s expanding directory before “Create configure and configure and build”.
Assuming the tar ball (and mpd-0.17-1123-rtopt.diff.gz) is on USB memory stick.
tar zxvf /media/usb0/mpd-rtopt-110605.tgz cp /media/usb0/mpd-0.17-1123-rtopt.diff.gz ./ <- if necessary gzip -d mpd-0.17-1123-rtopt.diff.gz <- if necessary patch -p1 < mpd-0.17git-rtopt.diff <- 0.17git June 2011 version or patch -p1 < mpd-0.17-1123-rtopt.diff <- 0.17git November 2011 version or patch -p1 < mpd-0.16.2-rtopt.diff <- 0.16.2 patch -p1 < buffer.c.diff
And you must edit /etc/mpd.conf to make Yan’s patches effective before “Change MPD directory and start MPD”.
add realtime_option section.
realtime_option {
memlock "yes"
stack_reserve "1024"
heap_reserve "0"
main_priority "OTHER:0"
player_priority "FIFO:49"
decoder_priority "FIFO:48"
update_priority "OTHER:0"
}
add priority to audio_output
audio_output {
type "alsa"
name "alsa-xmos"
device "x20"
priority "FIFO:99" <-- add this line
}
Compiled binaries of MPD appling Tuning Patches by yan
Here are compiled binaries of MPD 0.17git and 0.16.2 appling Tuning Patches by yan. About what they are, refer to the article before.
Download compiled binaries of MPD 0.17git appling Tuning Patch
Download compiled binaries of MPD 0.16.2 appling Tuning Patch
MPD setting is below.
########### MPD CONFIGURATION ############
Archive support:
(-bzip2) (-ISO9660) (-ZIP)
Client support:
(-IPv6) (+TCP) (+UNIX Domain Sockets)
File format support:
(-AAC) (-C64 SID) (+FFMPEG) (+FLAC) (-FluidSynth) (-GME) (-libsndfile)
(-MikMod) (-MODPLUG) (-MAD) (-MPG123) (-MP4) (-Musepack) (-OggFLAC)
(-OggTremor) (+OggVorbis) (+WAVE) (-WavPack) (-WildMidi)
Other features:
(+libsamplerate) (-inotify) (+SQLite)
Metadata support:
(-cue) (+ID3)
Playback support:
(+ALSA) (-ROAR) (+FFADO) (+FIFO) (-File Recorder) (-HTTP Daemon) (-RAOP) (+JACK) (-libao) (+OSS)
(-OpenAL) (-OS X) (+Pipeline) (-PulseAudio) (-Media MVP) (-SHOUTcast)
(-Solaris) (-WinMM)
Streaming support:
(-CURL) (-Last.FM) (-MMS) (-CDIO_PARANOIA) (-Despotify)
##########################################
How to install.
login as root tar zxvf mpd????.tgz cd mpd???? run mpdinstall.sh(sh mpdinstall.sh)
The contents of the installation shell script is as follows.
#!/bin/bash
# mpdinstall.sh Script to install MPD with tunig patches
/etc/init.d/mpd stop
cp ./mpd /usr/local/bin
echo DAEMON=/usr/local/bin/mpd >>/etc/default/mpd
sed -i "s/^\([\t ]\+device[\t ]\+\"hw:[0-9]\+,[0-9]\+\".*\)$/\1\n\tpriority\t\"FIFO:52\"/" /etc/mpd.conf
cat ＜＜EOF＞＞/etc/mpd.conf
# realtime option
realtime_option {
memlock "yes"
stack_reserve "1024"
heap_reserve "10240"
main_priority "OTHER:0"
player_priority "FIFO:47"
decoder_priority "FIFO:48"
update_priority "OTHER:0"
}
EOF
/etc/init.d/mpd start
- Stop MPD,
- Copy binaries,
- Change MPD location to /usr/local/bin,
- Edit /etc/mpd.conf to configure realtime option,
- Start MPD. Change parameter values as you like.
Here is Yan’s readme.txt.
You can understand details of the patches if you read it.
Latest (Dec 2011) compiled binaries of MPD appling Tuning Patches by yan
Here are latest compiled binaries of MPD 0.17git and 0.16.5 appling Tuning Patches by yan.
About how to install them, please refer to the article before.
Download compiled binaries of MPD 0.17git appling Tuning Patch
Download compiled binaries of MPD 0.16.5 appling Tuning Patch
The shell script to assign compile-options is below.
#!/bin/sh
./configure \
--disable-bzip2 \
--disable-iso9660 \
--disable-zzip \
--disable-cue \
--enable-id3 \
--enable-sqlite \
--enable-ffmpeg \
--enable-alsa \
--enable-pipe-output \
--enable-httpd-output \
--disable-recorder-output \
--disable-oss \
--enable-shout \
--disable-pulse \
--disable-ao \
--disable-mad \
--disable-oggflac \
--disable-inotify \
--disable-ipv6 \
--enable-curl \
--enable-mms \
--disable-wavpack \
--disable-sndfile \
--enable-rtopt \
--with-zeroconf=auto \
CFLAGS="-O2 -mtune=`uname -m`"
Readme.txt of Tuning Patches for MPD by yan
Introduction
These patches are for Mpd-0.17git and MPD-0.16.2 to add realtime_option to MPD.
Realtime_option means
- configuring MPD’s thread scheduling priority
- allocating real memory to MPD’s virtual space
by editing mpd.conf.
MPD applying these patches may cause abnormal system operation operation by incorrect use. Please be careful about setting parameters.
Please refer to “Starting-up Note” below.
Operating environment
These patches are only for Linux. You cannot use them without Linux.
I confirmed them in the following operating systems.
- voyage mpd
- ubuntu 10.10
- debian 6
Archive Contents
You can get the following files from the archive.
- mpd-0.17git-rtopt.diff
-
patches for mpd-0.17git
- mpd-0.16.2-rtopt.diff
-
patches for mpd-0.16.2
- buffer.c.diff
-
This is a complementary patch to rtopt.diff.
With this patch, you can choose higher priority of player than decoder.
It solve the problem about the opening of song and is effective in stable fast-forward.
It can work both in MPD 0.17git and 0.16.2. -
config-sample.sh
A sample of confifure(shell script). - memory.txt(in Japanese)
-
Documents on memory-related settings.
- readme.txt(in Japanese)
-
This file.
Reference sites
Following sites have published documents on various settings and parameters about this patches.
Please refer to them.
- “Mimizu Workshop”
This site. Bulletin board is available. - PC Audio Laboratory(in Japanese)
- voyage MPD-in Japanese
How to apply patches
mpd-0.16.2
Move the directory where MPD source is expanded.
patch -p1 < mpd-0.16.2-rtopt.diff
patch -p1 < buffer.c.diff
mpd-0.17git
Move the directory where MPD source is expanded.
patch -p1 < mpd-0.17git-rtopt.diff
patch -p1 < buffer.c.diff
MPD-0.17 version is under development, so these patches would not work if mpd’s version is different from the patch’s version.
Please check the reject file does not exist.
find . -name "*.rej" -print
If exists, please contact us (yo’s mail_address is bottom in this page or comment yo’s bulletin board).
How to compile
After patch MPD, run “autogen.sh” to create “configure”.
Run “configure”.
If the parameter “- enable-rtopt” is set in configure’s option, you can make realtime_option effective.
You can confirm by the MPD CONFIGURATION message “(+rtopt)” if rtopt is valid.
After configure, run “make” and “make install”.
–Supplement–
The file named “config-sample.sh” is an example file that specifies configure parameters. You can create always same MPD regardless the state of libraries installed in your system.
If “make” ends error, because library needed do not exist, then install it and run “sh config-sample.sh”.
How to set parameters
Added the following parameters to mpd.conf.
- realtime_option (new block parameters)
- memlock, and how to schedule threads(main, player, decoder, update), specify the priority
- audio_output (add priority parameter)
- how to schedule output thread, specify the priority
Realtime_option
realtime_option works when you add the block parameters enabling realtime_option to mpd.conf.
realtime_option parameters are as follows.
realtime_option {
memlock "yes"
stack_reserve "1024"
heap_reserve "0"
main_priority "OTHER:0"
player_priority "FIFO:49"
decoder_priority "FIFO:48"
update_priority "OTHER:0"
}
- memlock
- If you specify “yes”, memory used by mpd is locked(real memory space allocated for virtual).
Although Linux processes memory space at startup, real memory is not assigned to this area. Access to the area that is not allocated to memory, page fault signal is generated and kernel allocates memory to the running program.
Kernel locks into memory for real-time applications if you do not want them to intervene.
Also, the locked region will not swap out. (Voyage has no Swap area therefore it will not affect)
If your system has a small amount of memory, you specify “no” to avoid hang-up. - stack_reserve
- Specifies the size of real memory allocated to use pre-stack area.
Unit is “kb”. Please set the value in the range of 0 to 1024 maximum. - heap_reserve
- Specifies the size of real memory allocated to you to use at run-time memory in advance. Unit is “kb”.
If you specify memlock “no”, you may keep amount of real memory allocated by this parameter. However, the area you specify has possibly be swaped outed. - main_priority, player_priority, decoder_priority, update_priority
- Specify thread priority and scheduling.
Specify “scheduling : priority”
Scheduling method can be specified as follows.
About linux scheduling, refer to the man of sched_setscheduler(2).
- OTHER
- To schedule a regular Linux process. In this case, specify the priority 0.
- FIFO
- Accord to schedule priority.
If process/thread gets the right to run, it will continue to run until one of the following conditions are met
– runnable process/thread with higher priority appears
– it waives its right to run (yield)
– it sleeps (wait until the execution condition is satisfied)
When multiple processes/threads are running under the same priority order, kernel decide a process/thread to run with “first in first out(FIFO)” order. If process/thread sleeps. it is queued to the end of the queue. - RR
- Accord to schedule priority.
If process/thread gets the right to run, it will continue to run until one of the following conditions are met
– runnable process/thread with higher priority appears
– it waive its right to run (yield) – it sleep (wait until the execution condition is satisfied)
– conditions above are not met even within a period of time
When multiple processes/threads are running under the same priority order, kernel decide a process/thread to run with “first in first out(FIFO)” order. If process/thread sleep to wakeup it is queued to the end of the queue. - BATCH
- I do not know.
Typically, use FIFO.
Priority FIFO and RR is in the range of 1-99. The larger the priority number is higher. (Note “top” command is opposite).
Priority of Output
Specify priority by describing the parameters in the scheduling block “audio_output”.
Example:
audio_output {
type "alsa"
name "alsa-xmos"
device "x20"
priority "FIFO:81"
}
If you have more than one audio_output, specified priority in each audio_output.
Starting-up Note
If you specify realtime_option, limit values are cleared. A non-root can not execute this system calls, therefore please start MPD at the root.
Also, /etc/security/limits.conf is not referenced. (It may be a security hole)
- Extra Starting-up Note 1 — About memorylock and heap_reserve memory value
- if you use memlock, large value of heap_reserve and stack_reaserve may cause swap because the amount of memory other processes can use decrease. In this case a system as voyage MPD that do not use swap method cannot activate process.
heap_reserve could be 0 if you set memolock no. When you set memlock yes and heap_reserve not 0, you should determine the value of heap_reserve very carefully. - Extra Starting-up Note 2 — About busy hang by inappropriate scheduling
- There is no method to stop a system that loops and hangs by inappropriate scheduling. In this case you must reset a system by reset button.
Therefore it is recommended that you use a dedicated system such as Voyage MPD for these patches.
Fortunately, I didn’t encountere the situation like this busy loop. But please be careful about the system such as MPD 0.17 which is now in development.
From here is a technical note.
MPD thread
MPD consists of the following threads.
- main thread
- starts each thread and communicates with client programs.
- player thread
- controls player’s commands (play, stop etc.) and monitors buffers betweend ecoder and output to manage that decoder thread and the output thread work properly.
- decoder thread
- load audio files, convert them to pcm, pass them through buffers to output thread.
- output thread
- get pcm data from decoder thread and pass them to the pcm output driver.
- update thread
- update tag_cache(DB).
Setting policy of the priority of each thread
- main and update thread
- they seems to be not directly involved in playing music, therefore “OTHER:0” to them.
- decoder thread
- when it deals with compressed files such as alac or flac, it consumes relatively large CPU time. In this conditions if it is assigned high priority, other threads can not work properly. Therefore I assume it is assigned relatively low priority.
- output thread
- Decoder operates as a producer and output operates as a consumer in synchronization with the output sampling rate of music files. Output does not consume CPU. (*1)
It seems that if the operation of output is distorted, the sound operation of the thread affected very much (no evidence, just my assumption). Therefore I think output thread must have relatively high priority.
*1 Like Alsa if the sampling rate conversion is carried out in the library, this is not yhe case.
- player thread
- higher priority than the decoder is recommended.
In summary
main = update <<< decoder < player < output
Processes related in audio playback are
- irq/12-ehci_hcd (USB interrupt handler)
- irq/12-ohci_hcd (USB interrupt handler)
- sirq-timer, sirq-hrtimer timer-related interrupt handlers
- sirq -**, irq-** (Other interrupts handlers)
If decoder uses CPU for a long time, the operation of the interrupt handler could be disturbed. Therefore decoder priority should be lower than interrupt handlers priority.
Also, when you use USB audio devices, USB interrupt handlers do not want to upset any action.
Timer interrupts do not want to be disturbed too much when it is used to adjust the timing of the program. However, sirq-timer consume CPU highly, so too much high priority of sirq-timer is not desirable to control whole ballance.
I think that is a good set as follows to consider these factor.
decoder < player < sirq-**, irq-** < output = usb interrupt handlers = sirq-hrtimer
or
decoder < player < sirq-**, irq-** < usb interrupt handlers = sirq-hrtimer < output
Priority of the process must be tuned in coordination between processes. It might be related to a relative thing, so other combinations could be considered.
The priority value itself does not make much sense. Correlation of the value is important.
For exsample, if there is no process running priority level 80-89, there is no operational change by setting a process priority level 80 and 89. But if there is a process running priority level 85, setting a process priority level 80 and 89 means changing the operation of process.
— Memo —
On audio_buffer_size, buffer_before_play
Between decoder and output, there are FIFO buffers through which decoder deliver PCM data to output. Player thread is monitoring buffer condition(free or not) of decoder. This buffer is known as music_buffer.
“music_buffer” will be managed by the unit of 4kb chunks.
The number of chunks is determined by “audio_buffer_size” / 4kb. –> Chunks
“before_play” will be replaced by the number of chunks. (Chunks * buffer_before_play) / 100
Player thread which monitors the extent of free space in music_buffer and directs the transfer of data to decoder.
It decide free space in music_buffer by the following formula.
The number of buffers in the current chunk < (before_play + (chunks * 3) / 4)
If before_play is 0 (buffer_before_play 100 percent if you set) and 1/4 in the music_buffer is available, then data could be transferred to decoder.
And if befor_play is over 25%, available, data could be transferred to decoder.
On the other hand, decoder have internal buffers for conversion when it receives a request from player thread, it add music_buffer until full. When buffer is emptied for the conversion between them, it read file data from the conversion.
From above, if buffer_before_play over 25 percent, the operational result should be the same.
At this time the cpu load of decoder is distributed because it is often invoked.
When buffer_befor_play become to 0, the amount conversion of decoder become large. Therefore data may be lost as buffer_size is insufficient.
When you play high-bit data samples, the condition is more severe.
As audio_buffer_size is known to change sound expression, it is caused by this thread interference. Therefore decoder priority is lower than output priority, it will be no longer affected.
“audio_buffer_size” change comes out not to affect sound.
Configuration example
My currentl configuration is the following settings.
-------- Mpd.conf --------
realtime_option {
memlock "yes"
stack_reserve "1024"
heap_reserve "0"
main_priority "OTHER: 0"
player_priority "FIFO: 49"
decoder_priority "FIFO: 48"
update_priority "OTHER: 0"
}
audio_output {
type "alsa"
name "alsa-xmos"
device "x20"
priority "FIFO: 99"
}
-------------------------------
--------- / Etc / rc.local --------
chrt-p-f 98 `pgrep sirq-hrtimer`
# Chrt-p-f 97 `pgrep sirq-timer`
chrt-p-f 98 `pgrep irq/12-ehci_hcd`
chrt-p-f 98 `pgrep irq/12-ohci_hcd`
---------------------------------------
How to confirm a setting
Confirm command priority.
ps-eLo pid, lwp, rtprio, priority, cmd
“pid + lwp” can identify threads.
lwp priority is
main < decoder < player < output
in turn.
If there are multiple outputs, you can not specify threads.
rtprio is realtime priority.
TOP priority is same as PR. “RT” in TOP means rtprio = 99, .
About rtprio and priority, refer to http://www.mazn.net/blog/2010/09/18/311.html
This site would be helpful.
memory status
You can confirm your memory ussage by the following command. (Process ID is pid).
# cat /proc/pid/status
Example
If you start MPD by the mpd.conf in the configuration example above,
# cat /proc/1726/status Name: mpd State: S (sleeping) Tgid: 1726 Pid: 1726 PPid: 1 TracerPid: 0 Uid: 103 103 103 103 Gid: 29 29 29 29 FDSize: 32 Groups: 29 VmPeak: 60152 kB VmSize: 60148 kB VmLck: 60148 kB VmHWM: 60136 kB VmRSS: 60132 kB VmData: 40836 kB VmStk: 1032 kB VmExe: 268 kB VmLib: 17664 kB VmPTE: 72 kB .....
VmSize is the size of virtual space.
VmLck is the size of virtual space locked.
VmRss is the size of physical memory allocated.
VmData is the size of uninitialized data.
VmStk is the stack size.
VmSize = VmLck means locking the entire virtual space (which is fixed in physical memory).
If you start MPD without realtime_option specified
VmPeak: 51920 kB VmSize: 51920 kB VmLck: 0 kB VmHWM: 14160 kB VmRSS: 14160 kB VmData: 30596 kB --- heap_reserve minutes is smaller VmStk: 84 kB --- stack is also reduced VmExe: 268 kB VmLib: 20624 kB VmPTE: 52 kB
As VmRss is smaller than VmData, there is still physical memory not allocated in the uninitialized data section of program.
If you set memlock set “no”, following is the result.
VmPeak: 63108 kB VmSize: 63108 kB VmLck: 0 kB VmHWM: 25416 kB VmRSS: 25416 kB --- heap_reserve be increased by VmData: 40836 kB --- heap_reserve be increased by VmStk: 1032 kB VmExe: 268 kB VmLib: 20624 kB VmPTE: 60 kB
heap_reserve is allocated in the physical memory but there are places not yet allocated.
Thus, memlock seems to be better.
If you set heap_reserve size more than the difference between VmData and VmSize, you can increase the VmSize.
heap_reserve to “102400”
VmPeak: 155272 kB VmSize: 155272 kB VmLck: 155272 kB VmHWM: 155256 kB VmRSS: 155256 kB VmData: 132996 kB VmStk: 1036 kB VmExe: 268 kB VmLib: 20624 kB VmPTE: 164 kB
If VmSize and VmPeak is increaseing during MPD works, it is a good idea to increase heap_reserve in advance.
(PC_Audio) Comments
Best Tuning Tips for Voyage MPD
Play MPD from memory file
You shoud have enough memory to try this tip. If you want to play a whole CD at once, 2MB memory will be necessary.
Voyage MPD has mount point(/dev/shm) for tmpfs(you can confirm it by df command).
root@voyage:~# mkdir /dev/shm/music_mem root@voyage:~# ln -s /dev/shm/meusic_mem/ /music root@voyage:~# cp -r /music/BIS\ Sampler\ 1992 /dev/shm/music_mem root@voyage:~# sync;echo 3 > /proc/sys/vm/drop_caches
“/music” is music directory.
“sync;echo 3 > /proc/sys/vm/drop_caches” clear cache.
Note that Linux limits tmpfs capacity to the half size of real memory. You can change the value by mount command or fstab. Anyway real memory size is very important for this tip.
There are two problems for this Tip. Processing time and Time-consuming. About processing time faster hard is needed. About time-consuming following setup of emacs dried, lisp and shell script is effective.
Edit shell script in home directory as following.
#!/bin/bash # Clear cache, start to play # mpc_start.sh # sync;echo 3 > /proc/sys/vm/drop_caches mpc clear mpc update music_mem sleep 1 mpc ls music_mem | mpc add sleep 1 mpc play
Sleep timer values must be adjusted according to your environment.
Add .emacs following lines.
; Assigh z-key to music-file-copy
(add-hook 'dired-mode-hook
(lambda ()
(define-key dired-mode-map "z" 'dired-cp-music)))
; Copy music file
(defun dired-cp-music ()
(interactive)
(let ((file (dired-get-filename)))
(message "file copy start")
(setq buf (get-buffer-create "copy_music_file"))
(with-current-buffer buf
(erase-buffer))
(call-process "rm" nil buf nil "-r" "/dev/shm/music_mem")
(call-process "cp" nil buf nil file "-r" "/dev/shm/music_mem")
(call-process "ls" nil buf nil "-l" "/dev/shm/music_mem")
(call-process "/root/mpc_start.sh" nil buf nil)
(display-buffer buf)))
Run “emacs /music” dried. Select music directory. Push “z” key to start playing music.
You should edit and add following lines to “/etc/rc.local” to make this tip effective automatically after reboot.
mkdir /dev/shm/music_mem mpc clear mpc update music_mem
Setup grub parameters for tuning
A file you must edit will be changed whether you have updated grub.
- /boot/grub/menu.lst if you did not update grub. <- grub 0.97
- /boot/grub/grub.cfg if you changed grub. <- grub 1.98 or upper
“grub.cfg” is a read-only file by default therefore you should chmod it 744 as root.
Add “clocksource=hpet” and “maxcpus=1” to kernel line(s) for grub tuning.
Edit kernel line(s) like this.
root@voyage:~# emacs /boot/grub/menu.lst or /boot/grub/grub.cfg (from) kernel /vmlinuz root=LABEL=ROOT_FS ( to ) kernel /vmlinuz root=LABEL=ROOT_FS clocksource=hpet maxcpus=1
Note both tuning parameters are environment dependent.
hpet(high precision timer)
Your H/W should support a high precision timer for “hpet”.
You can check whether your H/W support a high precision timer for excellent timer performance or not by followig comands.
root@voyage:~# cat /sys/devices/system/clocksource/clocksource0/available_clocksource # confirm available_clocksource root@voyage:~# cat /sys/devices/system/clocksource/clocksource0/current_clocksource # confirm current_clocksource
maxcpus(Multi CPU support)
Refer to this link.
You can check your CPU type by the following command.
root@voyage:~# cat /proc/cpuinfo
NAS tuning setup
To improve audio quality it is recommended that music data are placed on NAS. Therefore NAS tuning setup is very important.
cifs buffer tuning
Refer to this page about the detail of parameters.
Maximize read buffer size and optimize write buffer size. Edit /etc/fstab and “mount -a”.
root@voyage:~# emacs /etc/fstab //192.168.0.3/cd2 /music1 cifs username=hoge,password=,uid=mpd,file_mode=0644,dir_mode=0755,iocharset=utf8,rsize=130048,wsize=4096 0 0 mount -a
Tune LAN buffers size
Refer to this link and this page.
Add following lines to /etc/sysctl.conf.
root@voyage:~# emacs /etc/sysctl.conf net.core.rmem_max=12582912 net.core.wmem_max=12582912 net.ipv4.tcp_rmem= 10240 87380 12582912 net.ipv4.tcp_wmem= 10240 87380 12582912 net.ipv4.tcp_timestamps = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_sack = 1 net.ipv4.tcp_no_metrics_save = 1 net.core.netdev_max_backlog = 5000 vm.overcommit_memory = 2 vm.overcommit_ratio = 50 root@voyage:~# sysctl -p
Best size depend on your physical memory size and LAN speed. Tune them as you like.
Setup tuning parameters of Linux
Adjust control values.
root@voyage:~# emacs /etc/sysctl.conf # adjust control values fs.inotify.max_user_watches = 524288 vm.swappiness = 10
Adjust limit values
root@voyage:~# emacs /etc/security/limits.conf # adjust limit values @audio - rtprio 99 @audio - memlock unlimited @audio - nice -19
Selct services to stop by using sysv-rc-conf. You must install sysv-rc-conf first.
“cron, dnsmasq, hostpapd, klogd, lirc, lighttpd, nfs-common, pptpd, portmap, sysklogd, watchdog, wd_keepalive” are candidates to remove.
root@voyage:~# apt-get remove pptpd # Memory leak root@voyage:~# apt-get install sysv-rc-conf # Stop daemon services root@voyage:~# sysv-rc-conf #
Adjust latency timer values Latency timer channel number depend on your environment.
root@voyage:~# lspci -nn # adjust latency timer values root@voyage:~# lspci -v # root@voyage:~# emacs /etc/rc.local # setpci -v -d 8086:27cb latency_timer=ff setpci -v -d 8086:27cc latency_timer=ff
Adjust priority values. Interrrupt handler names depend on your system.
root@voyage:~# lsusb # adjust priority values root@voyage:~# cat /proc/interrupts # root@voyage:~# ps aux # root@voyage:~# emacs /etc/rc.local # chrt -f -p 53 `pgrep sirq-timer/0` chrt -f -p 53 `pgrep sirq-timer/1` chrt -f -p 51 `pgrep irq/23-ehci_hcd` chrt -f -p 52 `pgrep irq/16-uhci_hcd`
You will find more information about priority tuning next chapter.
How to setup priority for Voyage MPD
In this chapter I will explain how to use Yan’s tuning patch and setup priority for Voyage MPD.
Yan’s tuning patch is intended for the best tuning of Voyge MPD. I think Voyage MPD as a RT Linux works best by Yan’s tuning patch.
Find process and thread working when you play music
From here I will explain on condition that music data is read from NAS and play music using USB audio devices.
First check interrupt processes.
root@voyage:~# cat /proc/interrupts
CPU0
0: 136 IO-APIC-edge timer
1: 8 IO-APIC-edge i8042
9: 0 IO-APIC-fasteoi acpi
14: 0 IO-APIC-edge ide0
16: 168578 IO-APIC-fasteoi uhci_hcd:usb5, eth0
18: 0 IO-APIC-fasteoi uhci_hcd:usb4
19: 2261 IO-APIC-fasteoi ata_piix, uhci_hcd:usb3
23: 152168 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 43427 Local timer interrupts
SPU: 0 Spurious interrupts
PMI: 0 Performance monitoring interrupts
PND: 0 Performance pending work
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
ERR: 0
MIS: 0
Numbers under “CPU0” are interrrupt number. Therefore only “13:IO-APIC uhci_hcd:usb5, eth0(is NAS connection), 23:IO-APIC ehci_hcd:usb1, uhci_hcd:usb2(is USB audio), LOC:Local timer interrupts” are working during the play.
Check interrrupt process numbers snd names and interrrupt levels.
root@voyage:~# ps -eLo pid,rtprio,priority,cmd | grep irq
4 49 -50 [sirq-high/0]
5 49 -50 [sirq-timer/0]
6 49 -50 [sirq-net-tx/0]
7 49 -50 [sirq-net-rx/0]
8 49 -50 [sirq-block/0]
9 49 -50 [sirq-block-iopo]
10 49 -50 [sirq-tasklet/0]
11 49 -50 [sirq-sched/0]
12 49 -50 [sirq-hrtimer/0]
13 49 -50 [sirq-rcu/0]
120 50 -51 [irq/9-acpi]
942 50 -51 [irq/1-i8042]
1147 50 -51 [irq/14-ide0]
1148 50 -51 [irq/23-ehci_hcd]
1149 50 -51 [irq/19-ata_piix]
1156 50 -51 [irq/23-uhci_hcd]
1157 50 -51 [irq/19-uhci_hcd]
1158 50 -51 [irq/18-uhci_hcd]
1159 50 -51 [irq/16-uhci_hcd]
1831 50 -51 [irq/16-eth0]
As you can see, realtime S/W interrupt level is 49 and H/W interrupt level is 50 by default.
Check “top” display.
1st time
root@voyage:~# top
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2681 mpd 20 0 58996 56m 14m S 1 2.8 0:04.37 mpd
1148 root -51 0 0 0 0 S 1 0.0 1:15.33 irq/23-ehci_hcd
5 root -50 0 0 0 0 S 0 0.0 0:02.37 sirq-timer/0
1228 root -51 0 0 0 0 S 0 0.0 0:05.63 irq/23-uhci_hcd
1242 root -51 0 0 0 0 S 0 0.0 0:06.06 irq/16-uhci_hcd
1949 root -51 0 0 0 0 S 0 0.0 0:07.30 irq/16-eth0
2nd time
root@voyage:~# top
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2681 mpd 20 0 58996 56m 14m S 1 2.8 0:12.37 mpd
1148 root -51 0 0 0 0 S 1 0.0 1:19.72 irq/23-ehci_hcd
5 root -50 0 0 0 0 S 0 0.0 0:02.49 sirq-timer/0
13 root -50 0 0 0 0 S 0 0.0 0:02.60 sirq-rcu/0
1831 root -51 0 0 0 0 S 0 0.0 0:07.69 irq/16-eth0
2065 root 20 0 0 0 0 S 0 0.0 0:10.52 cifsd
“TIME+” is cumulative operating time.
You can know that “mpd” and “cifsd” are major working task.
Check those processes name.
root@voyage:~# ps -eLo pid,lwp,rtprio,priority,cmd | egrep "mpd|cifsd" PID LWP RTPRIO PRI CMD 2065 2065 - 20 [cifsd] 2681 2681 - 20 /usr/local/bin/mpd /etc/mpd.conf 2681 2682 - 20 /usr/local/bin/mpd /etc/mpd.conf 2681 2684 - 20 /usr/local/bin/mpd /etc/mpd.conf 2681 2687 - 20 /usr/local/bin/mpd /etc/mpd.conf
MPD runs as 4 threads. From the information of yan’s readme.txt, These 4 threads are main, player, decoder and output.
Now you can know all related processes and threads.
- S/W interrupt process
- sirq-timer/0
- H/W interrupt process
- irq/23-ehci_hcd —> USB 2.0 interrupt irq/23-uhci_hcd —> USB 1.1 interrupt irq/16-eth0 —> LAN interrupt irq/16-uhci_hcd —> USB 1.1 interrupt
- LAN process
- cifsd
You can change priority of these processes by using “chrt” command.
- MPD process
- main thread player thread decoder thread update thread output thread
You can chage priority of these threads by using yan’s patch(This is what yan’s patch is great).
Change priority of process by using “chrt” command
“chrt” is a command to manipulate real-time attributes of a process. Usage is folloeing.
chrt -f -p priority process-number
You can get process-number from process name by using “pgrep” like this.
chrt -f -p 52 `pgrep irq/23-uhci_hcd`
You had better make them a shell script like this.
#!/bin/bash # chrtset.sh setup realtime priority for Voyage MPD chrt -f -p 50 `pgrep sirq-timer/0` chrt -f -p 52 `pgrep irq/23-uhci_hcd` chrt -f -p 52 `pgrep irq/23-ehci_hcd` chrt -f -p 52 `pgrep irq/16-uhci_hcd` chrt -f -p 52 `pgrep irq/16-eth0` chrt -f -p 48 `pgrep cifsd`
Edit /etc/rc.local to run this script when you boot.
root@voyage:~# emacs ./chrtset.sh edit and save chrtset.sh root@voyage:~# emacs /etc/rc.local add the following line and save rc.local sh /root/chrtset.sh
Change priority of threads of MPD by using yan’s patch
Refer yan’s readme.txt about how to edit tunings parameters of “mpd.conf”.
For convenience, I collected these parameters at the beginning of mpd.conf.
# An example configuration file for MPD
# realtime option
realtime_option {
memlock "yes"
stack_reserve "1024"
heap_reserve "0"
main_priority "OTHER:0"
player_priority "FIFO:50"
decoder_priority "FIFO:47"
update_priority "OTHER:0"
}
audio_output {
type "alsa"
name "My ALSA Device"
device "hw:0,0" # optional
priority "FIFO:52"
# format "44100:16:2" # optional
# mixer_device "default" # optional
# mixer_control "PCM" # optional
# mixer_index "0" # optional
}
audio_buffer_size "1024"
buffer_before_play "30%"
(PC_Audio) Comments
Extra Tips for Voyage MPD
How to use firewire audio devices
Voyage MPD kernel has built in support for firewire devices. Therefore you can run them by building FFADO and installing Jack.
Confirm firewire devices connection
root@voyage:~# lsmod | grep -e 1394 -e firewire firewire_ohci 17362 0 firewire_core 31344 1 firewire_ohci crc_itu_t 981 1 firewire_core root@voyage:~# ls -l /dev/fw* crw------- 1 root root 253, 0 2011-06-06 02:14 /dev/fw0 crw-rw---- 1 root audio 253, 1 2011-06-06 02:14 /dev/fw1 root@voyage:~# grep . /sys/bus/firewire/devices/fw*/*_name /sys/bus/firewire/devices/fw0/model_name:Juju /sys/bus/firewire/devices/fw0/vendor_name:Linux Firewire /sys/bus/firewire/devices/fw1.0/model_name:Konnekt8 /sys/bus/firewire/devices/fw1/model_name:Konnekt8 /sys/bus/firewire/devices/fw1/vendor_name:TC Electronic
About the meaning of each command, refer to Check your kernel modules and device permissions.
Advanced preparation(setup compilation environment and install the necessary modules)
Setup compilation environment
Add source info to /etc/apt/sources.list.
root@voyage:~# emacs /etc/apt/sources.list deb-src http://ftp.jp.debian.org/debian/ squeeze main contrib
Add source info to /etc/apt/sources.list.d/voyage.list.
root@voyage:~# emacs /etc/apt/sources.list.d/voyage.list deb-src http://www.voyage.hk/dists/0.7 ./
Install required modules.
root@voyage:~# svn co http://subversion.ffado.org/ffado/trunk/libffado ffado-svn root@voyage:~# apt-get build-dep libffado
Download FFADO sources. Install libraries and header files.
root@voyage:~# svn co http://subversion.ffado.org/ffado/trunk/libffado ffado-svn root@voyage:~# apt-get build-dep libffado
Buid FFADO
Compile and install.
root@voyage:~# cd ffado-svn/ root@voyage:~/ffado-svn# scons PREFIX=/usr DEBUG=False ENABLE_OPTIMIZATIONS=True ENABLLE_FIREWORKS=False ENABLE_MOTU=False ENABLE_DICE=True BUILD_TESTS=True root@voyage:~/ffado-svn# scons install
About parameters of compile, refer to Compile and install FFADO from source.
Why “REFIX=/usr”, refer to Why and how to avoid multiple parallel installations of jackd and FFADO.
Confirm the installation of FFADO.
root@voyage:~/ffado-svn# ffado-test ListDevices ----------------------------------------------- FFADO test and diagnostic utility Part of the FFADO project -- www.ffado.org Version: 2.999.0-1985 (C) 2008, Daniel Wagner, Pieter Palmers This program comes with ABSOLUTELY NO WARRANTY. ----------------------------------------------- === 1394 PORT 0 === Node id GUID VendorId ModelId Vendor - Model 0 0x00016604084009bf 0x00000166 0x00000021 TC Electronic - Konnekt8 1 0x0011d800011e2d2d 0x000011D8 0x00000000 Linux Firewire - no message buffer overruns
You can found your firewire audio device.
Install JACK
root@voyage:~/ffado-svn# aptitude install libjack-0.116 libjack-dev libjackson-json-java root@voyage:~/ffado-svn# aptitude install jackd2-firewire
Upper stage operation is for MPD and lower stage operation is for firewire Jack daemon.
Setup MPD environment
Start Jack server.
root@voyage:~/ffado-svn# jackd -dfirewire -r44100 &
Display firewire ports.
root@voyage:~/ffado-svn# jack_lsp firewire_pcm:00016604084009bf_mic | inst | line 1_in firewire_pcm:00016604084009bf_mic | inst | line 2_in firewire_pcm:00016604084009bf_coaxial L_in firewire_pcm:00016604084009bf_coaxial R_in firewire_pcm:00016604084009bf_midi 0_in firewire_pcm:00016604084009bf_line 1 | main L_out firewire_pcm:00016604084009bf_line 2 | main R_out firewire_pcm:00016604084009bf_coaxial L_out firewire_pcm:00016604084009bf_coaxial R_out firewire_pcm:00016604084009bf_midi 0_out
Use coaxial L_out and coaxial R_out.
Add audio_output for Jack to /etc/mpd.conf.
root@voyage:~/ffado-svn# emacs /etc/mpd.conf
audio_output {
type "jack"
name "mpd"
ports "firewire_pcm:00016604084009bf_coaxial L_out,firewire_pcm:00016604084009bf_coaxial R_out"
}
Change mpd passward and setup shell
root@voyage:~# passwd mpd
Enter new UNIX password:
Retype new UNIX password:
root@voyage:~# chsh mpd
Changing the login shell for mpd
Enter the new value, or press ENTER for the default
Login Shell [/bin/false]: /bin/bash
login as mpd user
Restart MPD. Kill jackd. Exit root. login mpd. Start jackd.
root@voyage:~/ffado-svn# /etc/init.d/mpd restart root@voyage:~# pkill jackd root@voyage:~/ffado-svn# exit login as mpd user mpd@voyage:~$ jackd -dfirewire -r44100 &
About jackd options, refer to Using JACK with FFADO.
(PC_Audio) Comments
Extra edition
MPD on SheevaPlug
What you need to build “MPD on SheevaPlug”
- SheevaPlug Dev kit
- SD card(capacity more than 2GB)
Before building “MPD on SheevaPlug”
At first you must prepare your host PC can access the serial console to connect SheevaPlug. Also you had better install TFPT in your host PC. The way to access the serial console and to install TFPT is different from the OS you use, please find the guides in internet.
Depending on the device you have, you may have to upgrade the u-boot. In this case refer to this page.
Your SheevaPlug must be connected to an Ethernet cable because many files should be downloaded from the Internet for building “MPD on SheevaPlug”.
Install stable Debian to your SheevaPlug
Much of the information of this chapter depends on this page. Many thanks to the auther.
Before you start the installation, you have to download the uImage and uInitrd from the link and place them in your TFPT program’s directory. Then start TFPT.
Connect SD card(upsidedown) to your SheevaPlug and start SheevaPlug and press a key to interrupt the boot process from your host serial console.
You must change a setting from the boot command line as your SheevaPlug will boot Debian kernel on SD card and can access to your host TFPT program.
Hit any key to stop autoboot: 3 0 Marvell>> setenv mainlineLinux yes Marvell>> setenv arcNumber 2678 Marvell>> setenv serverip 192.168.0.3 <- your host IP address Marvell>> setenv ipaddr 192.168.0.35 Marvell>> setenv netmask 255.255.255.0 Marvell>> saveenv Saving Environment to NAND... Erasing Nand...Writing to Nand... done Marvell>> reset
Now you can load and start the installer.
Marvell>> tftpboot 0x01100000 uInitrd Marvell>> tftpboot 0x00800000 uImage Marvell>> setenv bootargs console=ttyS0,115200n8 base-installer/initramfs-tools/driver-policy=most Marvell>> bootm 0x00800000 0x01100000
The installation itself is standard and you can follow the installation guide.
The followins are my choice(in red).
Select a language -> C Select your location -> Asia -> Japan Detecting network hardware Configuring the network -> debian Domain name -> ddo.org Choose a mirror of the Debian archive -> Japan -> ftp.jp.debian.org HTTP proxy information (blank for none) -> (none) Loading additional components Set up users and passwords root password -> ******** Full name for the new user -> xxxxx Choose a password for the new user -> ******** Getting the time from a network time server Detecting disks and all other hardware Starting up the partitioner Partition disks Partitioning method -> Guided - use entire disk Selected for partitioning -> MMC/SD card #1 (mmcblk0) - 2.0 GB SD 00000 Partitioning scheme -> All files in one partition (recommended for new users) -> Finish partitioning and write changes to disk Write the changes to disks? -> Yes Partitions formatting Installing the base system Select and install software Configuring popularity-contest -> Yes Software selection -> SSH server
Making the system bootable Installation complete -> Continue
The installation has been done.
You must configure u-boot so that it will automatically boot Debian. Interrupt the boot process of u-boot and enter the following commands.
Hit any key to stop autoboot: 3 0 Marvell>> setenv bootargs_console console=ttyS0,115200 Marvell>> setenv bootcmd_mmc 'mmcinit; ext2load mmc 0:1 0x00800000 /uImage; ext2load mmc 0:1 0x01100000 /uInitrd' Marvell>> setenv bootcmd 'setenv bootargs $(bootargs_console); run bootcmd_mmc; bootm 0x00800000 0x01100000' Marvell>> saveenv Saving Environment to NAND... Erasing Nand...Writing to Nand... done Marvell>> reset
Initial settings and install Japanese environment
Now yon can login Debian(Stable version) on ARM. Password is the password which you enter in the installation.
Debian GNU/Linux 6.0 debian ttyS0 debian2 login: root Password: ******** Linux debian2 2.6.32-5-kirkwood #1 Tue Jun 14 23:05:32 UTC 2011 armv5tel
First you had better fix your IP address and update&upgrade.
root@debian2:~# nano /etc/network/interfaces
#iface eth0 inet dhcp
iface eth0 inet static
address 192.168.0.36
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
dns-nameservers 192.168.0.1
root@debian2:~# apt-get update
root@debian2:~# apt-get upgrade
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Nano is a compact editor builded in Debian. If you like emacs, install it. Please note it consumes some space of SD card.
root@debian2:~# apt-get install emacs Updating category cid.. Updating category cmap..
I am a Japanese so install Japanese environment(fonts and locales).
root@debian2:~# apt-get install ttf-kochi-gothic ttf-kochi-mincho ttf-kochi-gothic-naga10 ttf-sazanami-gothic ttf-sazanami-mincho Setting up ttf-kochi-gothic (20030809-9) ... Setting up ttf-kochi-mincho (20030809-9) ... root@debian2:~# apt-get install language-env manpages-ja (x-terminal-emulator) in auto mode. root@debian2:~# dpkg-reconfigure -plow locales Configuring locales -> ja_JP.UTF-8 -> Ok Generating locales (this might take a while)... ja_JP.UTF-8... done Generation complete.
Then setup Japanese environment.
root@debian2:~# set-language-env -R Setting up users' native language environment 8 : ja (Nihongo,Japanese) Input number > 8 network NO DOKOKA BETSUNO computer DE Canna server GA UGOITE IMASUKA [y/N] Wnn server GA UGOITE IMASEN. network NO DOKOKA BETSUNO computer DE Wnn server GA UGOITE IMASUKA [y/N] SKK server GA UGOITE IMASEN. network NO DOKOKA BETSUNO computer DE SKK server GA UGOITE IMASUKA [y/N] KANJI HENKAN NIHA DORE WO TSUKAI MASUKA 1=Canna 2=Wnn 3=SKK 4=Anthy 5=PRIME 6=none (1..6, [Enter]=1) 6 NIHONGO NIHA KANKEINO NAI SAMAZAMANA SETTEIWO OKONAI MASUKA [Y/n] X Window System DE UGOKU program NO SETTEI DESU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. bash SHIYOU JI NI, login JI NI JIKKOU SAREMASU. TAN-NI, .bashrc WO JIKKOU SURU DAKENO NAIYOU DESU. SETTEI WO OKONAI MASUKA [Y/n] SETTEI SHIMASU ... bash GA KIDOU SURU TOKI NI JIKKOU SAREMASU. SAMAZAMA NA SETTEI WO SHITEIRU NODE, MEWO TOOSHITE OITE KUDASAI. SETTEI WO OKONAI MASUKA [Y/n] SETTEI SHIMASU ... Canna NO SETTEI DESU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. csh NO KIDOU JI NI JIKKOU SAREMASU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. emacs NO SETTEI DESU. SETTEI WO OKONAI MASUKA [Y/n] SETTEI SHIMASU ... emacs DEHA, KANJI HENKAN NIHA DORE WO TSUKAI MASUKA? 1=Canna 2=Wnn 3=SKK 4=Anthy 5=PRIME 6=none (1..6, [Enter]=6) 6 ATARASHII file "/root/.emacs" WO TSUKURIMASU... bash NADO, readline library WO MOCHIITA program NO SETTEI DESU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. xdm WO TSUKATTE X Window System NI login SHITA TOKI NI JIKKOU SAREMASU. MATA, startx YA xinit WO TSUKATTE X WO KIDOU SHITA TOKI NIMO JIKKOU SAREMASU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. xemacs21 NO SETTEI DESU. SETTEI WO OKONAI MASUKA [Y/n] n SETTEI SHIMASEN. [Enter] key WO OSUTO KONO set-language-env HA SYUURYOU SHIMASU. root@debian2:~# emacs ./.bashrc LANG=ja_JP.UTF-8
Install Alsa and MPD
These take a little time but these are package installations. Therefore very easy.
root@debian2:~# apt-get install alsa-base alsa-utils root@debian2:~# apt-get install mpd mpc ncmpc
Update Debian to the latest version(unstable)
Compiled binaries are in sheeva.with-linux.com.
You can update Debian to the latest version automatically to use the installer(README-PLUG-UPDATE.sh) in this site.
First, download the installer(README-PLUG-UPDATE.sh)
root@debian2:~# wget http://sheeva.with-linux.com/sheeva/README-PLUG-UPDATE.sh root@debian2:~# chmod a+x README-PLUG-UPDATE.sh
You must specify Linux versionsnd SD card to start the installer.
At the moment recommended version is 2.6.38.8. Version 2.6.39.2 has a trouble that there is no sound in USB 2.0 supprt of Alsa 2.04.
root@debian2:~# ./README-PLUG-UPDATE.sh 2.6.38.8 --rootkernel ..... Extracting modules Writing kernel to /boot **************************************************************** update your bootcmd to load sheeva-2.6.38.8-uImage or create a link from /boot/sheeva-2.6.38.8-uImage to /boot/uImage ****************************************************************
You must make initrd by using sheeva-2.6.38.8.config.
root@debian2:~# wget http://sheeva.with-linux.com/sheeva/2.6.38/2.6.38.8/sheeva-2.6.38.8.config root@debian2:~# mv sheeva-2.6.38.8.config .config root@debian2:~# cp ./.config /boot/config-2.6.38.8 root@debian2:~# mkinitramfs -o ./initrd 2.6.38.8 root@debian2:~# mkimage -A arm -O linux -T ramdisk -C gzip -a 0x0 -e 0x0 -n "2.6.38.8 ramdisk" -d ./initrd /boot/uInitrd-2.6.38.8 Image Name: 2.6.38.8 ramdisk Created: Wed Jun 29 08:20:05 2011 Image Type: ARM Linux RAMDisk Image (gzip compressed) Data Size: 3096894 Bytes = 3024.31 kB = 2.95 MB Load Address: 0x00000000 Entry Point: 0x00000000
You shoud move directory to /boot and change links to uImage and uInitrd 2.6.38.8.
root@debian2:~# cd /boot
root@debian2:/boot# mv uImage{,-2.6.32-5-kirkwood}
root@debian2:/boot# mv uInitrd{,-2.6.32-5-kirkwood}
root@debian2:/boot# mv ./sheeva-2.6.38.8-uImage ./uImage-2.6.38.8
root@debian2:/boot# ln -s uImage-2.6.38.8 uImage
root@debian2:/boot# ln -s uInitrd-2.6.38.8 uInitrd
You can confirm the result. Then reboot.
root@debian2:/boot# ls -la total 21700 drwxr-xr-x 3 root root 1024 Jun 29 08:26 . drwxr-xr-x 22 root root 4096 Jun 14 16:46 .. -rw-r--r-- 1 root root 1003185 Jun 15 17:00 System.map-2.6.32-5-kirkwood -rw-r--r-- 1 root root 84134 Jun 15 17:00 config-2.6.32-5-kirkwood -rw-r--r-- 1 root root 81778 Jun 29 08:18 config-2.6.38.8 lrwxrwxrwx 1 root root 28 Jun 28 22:55 initrd.img -> initrd.img-2.6.32-5-kirkwood -rw-r--r-- 1 root root 5474545 Jun 28 23:18 initrd.img-2.6.32-5-kirkwood drwxr-xr-x 2 root root 12288 Jun 28 22:31 lost+found -rw-r--r-- 1 root root 1217590 Jun 29 08:15 sheeva-2.6.38.8-System.map lrwxrwxrwx 1 root root 15 Jun 29 08:26 uImage -> uImage-2.6.38.8 -rw-r--r-- 1 root root 1433612 Jun 28 23:19 uImage-2.6.32-5-kirkwood -rw-r--r-- 1 root root 2798800 Jun 29 08:15 uImage-2.6.38.8 lrwxrwxrwx 1 root root 16 Jun 29 08:26 uInitrd -> uInitrd-2.6.38.8 -rw-r--r-- 1 root root 5474609 Jun 28 23:19 uInitrd-2.6.32-5-kirkwood -rw-r--r-- 1 root root 3096958 Jun 29 08:20 uInitrd-2.6.38.8 lrwxrwxrwx 1 root root 25 Jun 28 22:55 vmlinuz -> vmlinuz-2.6.32-5-kirkwood -rw-r--r-- 1 root root 1433548 Jun 15 16:59 vmlinuz-2.6.32-5-kirkwood root@debian2:/boot# reboot
Update MPD to the latest version
Before you start building MPD, you must install the required tools and kernelheaders.
~# apt-get install git binutils gcc make subversion autoconf automake autotools-dev libtool pkg-config ~# apt-get install build-essential libncurses5-dev libncursesw5-dev libglib2.0 ~# wget http://sheeva.with-linux.com/sheeva/2.6.38/2.6.38.8/sheeva-2.6.38.8-KernelHeaders.tar.gz ~# tar x -C / --overwrite -zf ./sheeva-2.6.38.8-KernelHeaders.tar.gz
Install required packages.
~# apt-get install libogg0 libogg-dev libvorbis0a libvorbis-dev ~# apt-get install libavformat52 libavformat-dev libavcodec-dev libavcodec52 libavutil49 libavutil-dev ~# apt-get install libflac8 libflac-dev ~# apt-get install libasound2 libasound-dev libasound2-dev ~# apt-get install libsndfile-dev libsndfile1 libaudiofile0 libaudiofile-dev
git latest version of MPD
~# git clone git://git.musicpd.org/master/mpd.git
Automatically generate configure script.
~# cd mpd/ ~/mpd# ./autogen.sh
configure and build MPD.
~/mpd# pkill mpd ~/mpd# CFLAGS="-O2" ./configure --disable-ipv6 ~/mpd# make ~/mpd# make install
Change MPD directory, setup music directory, edit mpd.conf and start MPD.
~/mpd# emacs /etc/default/mpd
DAEMON=/usr/local/bin/mpd
~/mpd# emacs /etc/fstab
//192.168.0.3/cd2 /music1 cifs username=yo,password=,uid=root,file_mode=0644,dir_mode=0755,iocharset=utf8 0 0
~/mpd# mount -a
~/mpd# ln -s /music1/ /var/lib/mpd/music
~/mpd# emacs /etc/mpd.conf
#bind_to_address "localhost"
follow_outside_symlinks "yes"
follow_inside_symlinks "yes"
device "hw:1,0" # optional
~/mpd# /etc/init.d/mpd start
mpodjacket.rb by yan for MPoD and MPaD
This ruby script is developed by yan.
I think it may be very useful for MPoD and MPaD users.
You can download it from the following link.
mpodjacket.rb by yan – A server to deliver cover art to MPoD and MPaD
# mpodjacket.rb # # NAME # mpodjacket.rb - extracts cover art from music-file(FLAC,ALAC,MP3,OGG) and deliver it to MPoD # # SYNOPSIS # mpodjacket.rb [-r document_root] [-m music_holder] [-p port] [-s save_file] # # DESCRIPTION # mpodjacket.rb is ruby-script that delivers the cover art to MPoD. # mpodjacket.rb looks for cover art in the following order,to deliver the cover art found. # # 1. The requested files from MPoD. # 2. Folder.jpg, folder.jpg, Folder.jpeg, folder.jpeg. # 3. Cover art(jpeg only) extracted from music-files(FLAC,ALAC,MP3,OGG). # It is also saved to a file. # # OPTION # -r document_root # set document root, the default is /var/www. # # -m music_folder # set music folder, the default is /Music. # # -p port # set port, the default is 8888. # # -s set cover art's file name, default does not save. # # ex: # if music_folder is /home/mpd/Music # # ./mpodjacket.rb -r /home/mpd -m /Music -p 8888 -s Folder.jpg # # MPoD Local Cover art setting # # URL http://host:8888/Music # Filename Folder.jpg # # # INSTALLATION # # 1. install ruby (at least 1.8, or more if you use ogg 1.9) # 2. install ruby-audioinfo package # gem install ruby-audioinfo
You can get yan’s MPD tuning up Patches and Readme from this page. The link is here.
Voyage MPD v0.75 with latest Linux Kernel
Voyage MPD v0.75 is great. It is tuned best for audio performance with kernel 2.6.38.
But I think it is a little regrettable that yan’s tuning patches for MPD in this site can not be fully effectable in v0.75 because RT function is not applied to this version.
RT function is included in linux-2.6.39-after as force threaded irq-handlers. Therefore you could make Voyage MPD v0.75 with RT function by updating Voyage MPD v0.75 kernel to 2.6.39-after.
Kernel update is easy but you must care following two points.
- One is to update grub latest(2.0).
- Two is to select “Select USB Audio/MIDI driver” in menuconfig.
## update grub 2.0 apt-get install grub upgrade-from-grub-legacy # apt-get install os-prober if you need # os-prober if you need # update-grub2 if you need
If you are an Alix user you must setup GRUB_DEFAULT. Please refer to Mr. Shin blog more.
## install required packages
# apt-get install aptitude libncurses5-dev if you need
# aptitude install kernel-package fakeroot lzma if you need
cd /usr/src/
## get kernel sources and voyage 0.75 config
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.39.2.tar.bz2
wget http://mirror.voyage.hk/download/kernel_config/config-2.6.38-voyage_9.0-1
tar xjf linux-2.6.39.2.tar.bz2
cd linux-2.6.39.2
cp ../config-2.6.38-voyage_9.0-1 ./.config
## Whether this is necessary or not, I am not sure.
make oldconfig <-- reply to all quetions by default
make menuconfig
Device Drivers --->
< M > Sound card support --->
< M > Advanced Linux Sound Architecture --->
[ * ] USB sound devices --->
< M > USB Audio/MIDI driver
make-kpkg clean
make-kpkg --initrd --revision=voyage.2.6.39.2 kernel_image kernel_headers
cd ..
dpkg -i *.deb
## or not change direcrory and dpkg -i ../linux-headers-2.6.39.2_voyage.2.6.39.2_i386.deb ../linux-image-2.6.39.2_voyage.2.6.39.2_i386.deb
reboot
Choose kernel 2.6.39.2 from boot menu.
Now you must install alsa and MPD if necessary.
# apt-get install alsa-base alsa-utils # apt-get install mpd mpc ncmpc
After this you must setup MPD to work. This is same as a normal setup. So refer to the previous chapters of this page.
You must add linux kernel boot parameter “threadirqs” to effect force threaded irq-handlers.
emacs /etc/default/grub # seach following line and add "threadirqs". GRUB_CMDLINE_LINUX_DEFAULT="quiet threadirqs" update-grub2 reboot
Voyage MPD v0.75 with Linux 3.0 + RT patches
Recently Linux Kernel 3.0 was released. RT patches are again separated as patches-3.0-rtN. Here is the information about these patches.
You could build Kernel 3.0 for Voyage MPD 0.75 as following (assuming that you had installed grub2 and required packages. Refer to the previous chapter).
cd /usr/src/ ## get kernel sources and voyage 0.75 config wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.bz2 wget http://www.kernel.org/pub/linux/kernel/projects/rt/patches-3.0-rt3.tar.bz2 wget http://mirror.voyage.hk/download/kernel_config/config-2.6.38-voyage_9.0-1 tar xjf linux-3.0.tar.bz2 cd linux-3.0 cp ../config-2.6.38-voyage_9.0-1 ./.config bzcat ../patches-3.0-rt3.tar.bz2 | patch -p1 make menuconfig ## Processor type and features -> Preemption Model -> Fully Preemptible Kernel (RT) ## Select USB Audio/MIDI driver (refer to previous chater) make-kpkg clean make-kpkg --initrd --revision=voyage.3.0 kernel_image kernel_headers
About what you must do after make-kpkg, refer to the previous chapter.
Download Linux 3.0.9 Kernel with rt25 patches for Voyage MPD
You can download deb-files of Linux 3.0.9 Kernel with rt25 patches for Voyage MPD here.
About how to compile Linux Kernel with rt patches, please refer to previous chapters.
linux-image-3.0.9-rt25_voyage.3.0_i386.deb
I use Voyage 0.8 config(config-3.0-voyage_10.0-1) and change only “Processor type and features” in menuconfig “Preemption Model” -> “Fully Preemptible Kernel (RT)”.
How to install.
# Login as root. Place linux-image-3.0.9-rt25_voyage.3.0_i386.deb in your current direcrory. apt-get install grub upgrade-from-grub-legacy
If you are an Alix user you must setup GRUB_DEFAULT. Please refer to Mr. Shin blog more.
dpkg -i linux-image-3.0.9-rt25_voyage.3.0_i386.deb reboot
linux-headers-3.0.9-rt25_voyage.3.0_i386.deb
This is the header files of the kernel above.
dpkg -i linux-headers-3.0.9-rt27_voyage.3.0_i386.deb
to install it.
Voyage MPD v0.75 Kernel config tuned for Atom
You could download config file of tuned for Atom from the following links.
config_voyage_atom_smp_tune.tar.gz
Followings are the differences from the original config(config-2.6.38-voyage_9.0-1).
General setup (-atom) Local version - append to kernel release [ ] Enable VM event counters for /proc/vmstat( -＞ off) There are no changes of other parms in this layer. Enable the block layer [ ] Support for large (2TB+) block devices and files There are no changes of other parms in this layer. Processor type and features [*] Symmetric multi-processing support [ ] Enable MPS table (2) Maximum number of CPUs [ ] Support for extended (non-PC) x86 platforms [ ] Single-depth WCHAN output Processor family (586/K5/5x86/6x86/6x86MX) [*] Supported processor vendors ---＞ check only intel [ ] Enable DMI scanning( -＞ off) Preemption Model (Fully Preemptible Kernel (RT)) [ ] SMT (Hyperthreading) scheduler support [ ] Multi-core scheduler support [ ] Enable VM86 support [ ] AMD microcode patch loading support ＜ ＞ /dev/cpu/*/msr - Model-specific register support [ ] Support for hot-pluggable CPUs There are no changes of other parms in this layer. Power management and ACPI options [*] ACPI (Advanced Configuration and Power Interface) Support ---＞ ＜*＞ Button (0) Disable ACPI for systems before Jan 1st this year Other params in this layer are all off Other params in this layer are all off Bus options (PCI etc.) [*] PCI support [*] Interrupts on hypertransport devices Other params in this layer are all off Networking support [*] Wireless ---＞ ＜M＞ Common routines for IEEE802.11 drivers Other params in this layer are all off Other params in this layer are all off Device Drivers ＜*＞ ATA/ATAPI/MFM/RLL support (DEPRECATED) ---＞ <*> generic ATA/ATAPI disk support [*] ATA disk support [*] IDE ACPI support [*] legacy /proc/ide/ supportgeneric/default IDE chipset support Platform driver for IDE interfaces [*] Probe IDE PCI devices in the PCI bus order (DEPRECATED) Generic PCI IDE Chipset Support Intel PIIX/ICH chipsets support Other params in this layer are all off SCSI device support ---> {*} SCSI device support ＜*＞ SCSI disk support ＜M＞ SCSI generic support Other params in this layer are all off ＜M＞ Serial ATA and Parallel ATA drivers ---＞ [*] Verbose ATA error reporting [*] ATA ACPI Support [*] SATA Port Multiplier support AHCI SATA support [*] ATA SFF support [*] ATA BMDMA support Intel ESB, ICH, PIIX3, PIIX4 PATA/SATA support CS5535 PATA support (Experimental) CS5536 PATA support Generic platform device PATA support Generic ATA support Legacy ISA PATA support (Experimental) Other params in this layer are all off [ ] Multiple devices driver support (RAID and LVM) [ ] Fusion MPT device support IEEE 1394 (FireWire) support ---＞ all off [ ] ISDN support Input device support ---> ＜M＞ Event interface [*] Keyboards ---> Other params in this layer are all off Character devices ---> [ ] Legacy (BSD) PTY support [ ] /dev/kmem virtual device support There are no changes of other parms in this layer. [*] Network device support ---＞ [ ] Wireless LAN ＜ ＞ PPP (point-to-point protocol) support There are no changes of other parms in this layer. {M} I2C support ---＞ all off [ ] GPIO Support ＜ ＞ Dallas's 1-wire support ＜ ＞ Power supply class support ＜ ＞ Hardware Monitoring support ＜ ＞ Generic Thermal sysfs driver [*] Watchdog Timer Support ---＞ ＜M＞ Software watchdog ＜M＞ Intel TCO Timer/Watchdog [*] Intel TCO Timer/Watchdog Specific Vendor Support Other params in this layer are all off ＜ ＞ Multimedia support ---＞ Graphics support ---> ＜ ＞ /dev/agpgart (AGP Support) ---> (2) Maximum number of GPUs ＜ ＞ Direct Rendering Manager (XFree86 4.1.0 and higher DRI support) ---> [ ] Bootup logo ---> There are no changes of other parms in this layer. ＜M＞ Sound card support ---＞ ＜M＞ Advanced Linux Sound Architecture [*] Support old ALSA API [*] Verbose procfs contents [*] USB sound devices ---＞ ＜M＞ USB Audio/MIDI driver ＜M＞ Open Sound System (DEPRECATED) ---＞ ＜M＞ OSS sound modules ---＞ [*] Persistent DMA buffers [*] USB support ---＞ ＜ ＞ USB Monitor ＜ ＞ xHCI HCD (USB 3.0) support (EXPERIMENTAL) ＜ ＞ USB Modem (CDC ACM) support ＜ ＞ USB Wireless Device Management support ＜ ＞ USB Serial Converter support ---＞ ＜ ＞ USB LED driver support ＜ ＞ Cypress USB thermometer driver support ＜ ＞ USB Gadget Support ---> There are no chanes of other parms in this layer. [ ] X86 Platform Specific Device Drivers There are no changes of other parms in this layer.
Download Linux 3.0.9 Kernel tuned for Atom
You could download deb files of 3.0.10 kernel + rt27 patches build by this config.
linux-image-3.0.9-rt25-atom-smp-tune_voyage.3.0_i386.deb
linux-headers-3.0.9-rt25-atom-smp-tune_voyage.3.0_i386.deb
About how to install these deb files, refer to the previous chapter.
MPD on Cubox
CuBox is a small, fanless computer manufactured by the Israeli company SolidRun Ltd, available as an open source development platform.
I think it is best suitable for PC-audio purpose and have tried it.
Here I will publish my two images which I have built. They are same in content only filesytems are different.
What you need to install “MPD on Cubox”
- Cubox
- micro SD card(capacity more than 2GB)
- PC with a SD card reader
The reason is not sure but there are unbootable micro SD cards. From my experience, KINGMAX and SiliconPower’s cards are not bootable. Please change yor card when it cannot boot.
Download Ubuntu-Core images for Cubox
ubuntu-core xfs version
ubuntu-core ext3 version
Make Ubuntu-Core/Debian system for Cubox to a micro SD Card
In Windows you can choose appropriat application to expand gzip and write image. I use alzip for expansin and ddwin to write image.
In linux set your micro SD card to your Linux PC.
Place a system-backup to your current directory.
Confirm your SD card device name and the device is unmounted.
zcat CuboxAudioRTuned_ubuntu-core-[xfs|ext3]-20121108.img.gz | dd of=/dev/sdb
Remove your card and insert it into cubox, try turning on the power.
How to login
cubox login: root Password: cubox
network configration
auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp
ssh, avahi daemon and winbind are available. Host name is “cubox”.
mpd
Three mpd packages with RTopt and buffer patch by yan are available.
- mpd0.18git
- mpd0.17.2stable
- mpd-0.17git-jk8.11 with dCS patch by yan
You can change them from a terminal with the following script(command).
select-mpd [18g|17s|jk]
/etc/mpd.conf is set to play DSD native mode. If you want to play DSD-PCM convert mode, please edit select-mpd script in /usr/local/bin.
System Configuratin
Kernel configuration
Please refer to .confing in /boot of 1st partion.
installed packages
apt-get install openssh-server apt-get install ubuntu-minimal apt-get install avahi-daemon winbind sysv-rc-conf nano usbutils apt-get install cifs-utils alsa-base alsa-utils apt-get install mpd mpc ncmpc apt-get install aptitude apt-get install libflac-dev libogg-dev libvorbis-dev libid3tag0-dev libmad0-dev libcue-dev libasound2-dev apt-get install libsamplerate0-dev libshout3-dev libaudiofile-dev libresample1-dev libsamplerate0-dev apt-get install libavformat53 libavcodec53 libavutil51 libavformat-dev libavcodec-dev libavutil-dev apt-get install libsndfile1-dev libmms-dev libavahi-client-dev libavahi-glib-dev aptitude install libcurl-dev libcurl4-openssl-dev
locales
apt-get install language-pack-ja export LANG=ja_JP.UTF-8 update-locale LANG=ja_JP.UTF-8
On system tuning
nano /etc/security/limits.conf
add following
@audio - rtprio 99
@audio - memlock unlimited
@audio - nice -19
nano /etc/sysctl.conf
add following
net.core.rmem_max=12582912
net.core.wmem_max=12582912
net.ipv4.tcp_rmem= 10240 87380 12582912
net.ipv4.tcp_wmem= 10240 87380 12582912
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_no_metrics_save = 1
net.core.netdev_max_backlog = 5000
vm.overcommit_memory = 2
vm.overcommit_ratio = 50
nano /etc/mpd.conf
add realtime_option
realtime_option {
memlock "yes"
stack_reserve "2048"
heap_reserve "10240"
main_priority "OTHER:0"
player_priority "FIFO:52"
decoder_priority "FIFO:51"
update_priority "OTHER:0"
}
add audio_output
priority "FIFO:52"
make a script to set priorities
nano /etc/init.d/rtset.conf
creat a new file
#!/bin/sh
chrt -f -p 53 `pgrep irq/24-ehci_hcd`
chrt -f -p 53 `pgrep irq/29-eth0`
chrt -f -p 53 `pgrep cifsd`
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