Re: Real time for Ubuntu Studio 10.04 amd64
On Tue, 2010-07-13 at 01:32 +0400, Oleg Ivanenko wrote: 2010/7/13 Pablo pablo.f...@gmail.com One more significant(for me) reason for still using 2.6.31, except nvidia-problem, is that I find out that command ps output was somehow changed in subsequent kernels, so steps starts from 3 from http://subversion.ffado.org/wiki/IrqPriorities is not working. Hi Oleg, Just an idea. I use htop to see the processes and kernel threads' priorities. sudo apt-get install htop terminator I run htop in terminator because it uses the F10 to save configuration changes and gnome-terminal uses F10 to show the menus. F2 - Display Options: Disable Hide kernel threads - F10 F6 - Sort by: PRI Hi, Pablo! Thanks for pointing, I will try this way. -- Truly yours, Oleg Ivanenko aka Ash [if it wasn't so sad, it would be funny] I also prefer htop, but atop also has some advantages. -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
Hi Oleg :) hi Brian :) On Mon, 2010-07-12 at 11:45 -0500, Brian David wrote: This is one of the kernels that stops booting with the message 'mount: mounting none on /dev failed: No such device.' I have such message too but it is not stops booting and not affects my work. I have no idea what is this exactly :) This message will pop up, and the cursor will blink for some time, but the computer should start up if you wait long enough. At least, this is how my computer works with the current -rt kernel. I don't know what the actual message means, though. Aha, it might be some of that esoteric issues :D. For my self build kernel 2.6.31.6-rt19 on Suse 11.2 I need to wait around 10 seconds when GDM appeared, I also could log in, but than the screen will freeze and I need to push Ctrl + alt + double-backspace yes, I need to push backspace two times and log in (again), then everything is ok. - Ralf -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
Hi Ken :) On Sun, 2010-07-11 at 23:02 -0500, Kenneth Koym wrote: Ralf, Keep making these type postings; we need your expertise and questions! Ken On Sun, Jul 11, 2010 at 8:29 PM, Ralf Mardorf ralf.mard...@alice-dsl.net wrote: Hi :) I'm new to the list. Regarding to hw MIDI jitter, I'm testing and comparing several Linux setups. Here is a rough summary of my latest thread on LAD. What's bad with this posting? This is my question: I wonder what I need to do, to get a kernel-rt for Ubuntustudio 10.04? In other words, I couldn't boot a kernel-rt, but to do real time audio work, I need a kernel-rt. My question is about hints, what might be going wrong and how to solve it. Here are some details about my machine: Mobo M2A-VM HDMI AMD Athlon(tm) X2 Dual Core Processor BE-2350 RAM 2 GB Graphics NVIDIA 7200 GS Sound cards 2x Terratec EWX 24/96 This is the reason why I need a kernel-rt: Ubuntu Studio 10.04 amd64 $ uname -a Linux ubuntu 2.6.32-23-preempt #37-Ubuntu SMP PREEMPT Fri Jun 11 10:19:07 UTC 2010 x86_64 GNU/Linux $ alsa-midi-latency-test -Rrw=2 -o20:0 -i20:0 alsa-midi-latency-test 0.0.3 set_realtime_priority(SCHED_FIFO, 99).. done. clock resolution: 0.1 s SUCCESS best latency was 1.00 ms worst latency was 3.36 ms, which is great. 3.36 ms isn't great, but unusable to make music. openSUSE 11.2 amd64 uname -a Linux suse11-2 2.6.31.6-rt19 #1 SMP PREEMPT RT Wed Nov 18 16:59:26 CET 2009 x86_64 x86_64 x86_64 GNU/Linux alsa-midi-latency-test -Rrw=2 -o16:0 -i16:0 alsa-midi-latency-test 0.0.3 set_realtime_priority(SCHED_FIFO, 99).. done. clock resolution: 0.1 s SUCCESS best latency was 0.99 ms worst latency was 1.05 ms, which is great. PREEMPT vs PREEMPT RT and of course frequency scaling for an audio distro should be at performance by default, anyway, the frequency scaling isn't a big deal. This is about the issues when I try to boot the kernel-rt from the repositories resp. the messages I get instead of a desktop session: I tried to boot the kernel-rt from the Ubuntu repositories and I tried to build a kernel-rt myself. If I try to boot kernel 2.6.31-11-rt or kernel 2.6.31-10-rt from the repositories I get 'mount: mounting none on /dev failed: No such device.' Regading to the web this might be, because of CONFIG_DEVTMPFS. # cat config-2.6.31-11-rt | grep CONFIG_DEVTMPFS # cat config-2.6.32-23-preempt | grep CONFIG_DEVTMPFS CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y When I try to boot kernel 2.6.33-23-realtime from the repository I get 'ACPI: Expecting a [Reference] package element, found type 0'. I also tried to build a kernel-rt without succes: At least this three kernel-rt from the repositories come with an initrd. The kernel I tried to build the way I usually build kernels for Ubuntu with success, is missing an initrd. $ cd /usr/src $ sudo synaptic I checked if those packages were installed: bin86 build-essential bzip2 fakeroot gcc kernel-package make libncurses5-dev $ wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.33.5.tar.bz2 $ wget http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.33.5-rt23.bz2 $ tar xvjf linux-2.6.33.5.tar.bz2 $ rm linux-2.6.33.5.tar.bz2 $ mv linux-2.6.33.5 linux-2.6.33.5-rt23 $ ln -s linux-2.6.33.5-rt23 linux $ cd linux $ bunzip2 ../patch-2.6.33.5-rt23.bz2 $ patch -p1 ../patch-2.6.33.5-rt23 $ rm ../patch-2.6.33.5-rt23 $ cp /boot/config-2.6.32-23-preempt .config $ make oldconfig 81 x Enter $ make menuconfig Edited from Generic-x86-64 to Opteron/Athlon64/Hammer/K8 Save an Alternate Configuration File $ make oldconfig Nothing to do $ make-kpkg clean $ export CONCURRENCY_LEVEL=2 This didn't work: $ make-kpkg --rootcmd fakeroot --initrd kernel-image kernel-headers kernel-source
Re: Real time for Ubuntu Studio 10.04 amd64
2010/7/12 Ralf Mardorf ralf.mard...@alice-dsl.net What's bad with this posting? This is my question: I wonder what I need to do, to get a kernel-rt for Ubuntustudio 10.04? Hi, Ralf! Check this link http://ubuntustudio.org/LucidLynx and find phrases https://launchpad.net/~abogani/+archive/ppa; and realtime kernel will be available in Ubuntu Studio PPA in the text. May be this info will help you. Personally I have installed(default Ubunto Studio meta-package linux-rt): linux-image-2.6.31-11-rt Linux kernel image for version 2.6.31 on Ingo Molnar's full real time preemption patch -- Truly yours, Oleg Ivanenko aka Ash [if it wasn't so sad, it would be funny] -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
Hi, Ralf! 2010/7/12 Ralf Mardorf ralf.mard...@alice-dsl.net Thank you, unfortunately 2.6.33-23-realtime amd64 results with 'ACPI: Expecting a [Reference] package element, found type 0' and a login for text mode. FWIW I didn't log in and tested to start x or gdm. Personally I have installed(default Ubunto Studio meta-package linux-rt): linux-image-2.6.31-11-rt Linux kernel image for version 2.6.31 on Ingo Molnar's full real time preemption patch This is one of the kernels that stops booting with the message 'mount: mounting none on /dev failed: No such device.' I have such message too but it is not stops booting and not affects my work. I have no idea what is this exactly :) Is your machine an AMD dual core too and is the architecture of your 64 Studio also amd64, but x86? I have machine with x86. Perhaps it has to do with the NVIDIA graphics? Perhaps I should generate a xorg.conf by running 'sudo X -configure' and test the vesa driver. I dunno. Yes, I have NVIDIA videocard and it is the reason why I still use 2.6.31 kernel -- it still works with this kernel. The eye-catching thing regarding to 'mount: mounting none on /dev failed: No such device.' is # cat config-2.6.31-11-rt | grep CONFIG_DEVTMPFS # cat config-2.6.32-23-preempt | grep CONFIG_DEVTMPFS CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y that there's no output for 2.6.31-11-rt. May be this is a good point. But I don't dig with it, just stop to use new kernels temporarily and still using 2.6.31-rt One more significant(for me) reason for still using 2.6.31, except nvidia-problem, is that I find out that command ps output was somehow changed in subsequent kernels, so steps starts from 3 from http://subversion.ffado.org/wiki/IrqPriorities is not working. -- Truly yours, Oleg Ivanenko aka Ash [if it wasn't so sad, it would be funny] -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
On Mon, Jul 12, 2010 at 7:04 AM, Oleg Ivanenko oivane...@gmail.com wrote: Hi, Ralf! 2010/7/12 Ralf Mardorf ralf.mard...@alice-dsl.net Thank you, unfortunately 2.6.33-23-realtime amd64 results with 'ACPI: Expecting a [Reference] package element, found type 0' and a login for text mode. FWIW I didn't log in and tested to start x or gdm. Personally I have installed(default Ubunto Studio meta-package linux-rt): linux-image-2.6.31-11-rt Linux kernel image for version 2.6.31 on Ingo Molnar's full real time preemption patch This is one of the kernels that stops booting with the message 'mount: mounting none on /dev failed: No such device.' I have such message too but it is not stops booting and not affects my work. I have no idea what is this exactly :) This message will pop up, and the cursor will blink for some time, but the computer should start up if you wait long enough. At least, this is how my computer works with the current -rt kernel. I don't know what the actual message means, though. -- -Brian David -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
One more significant(for me) reason for still using 2.6.31, except nvidia-problem, is that I find out that command ps output was somehow changed in subsequent kernels, so steps starts from 3 from http://subversion.ffado.org/wiki/IrqPriorities is not working. Hi Oleg, Just an idea. I use htop to see the processes and kernel threads' priorities. sudo apt-get install htop terminator I run htop in terminator because it uses the F10 to save configuration changes and gnome-terminal uses F10 to show the menus. F2 - Display Options: Disable Hide kernel threads - F10 F6 - Sort by: PRI Cheers! Pablo -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Real time for Ubuntu Studio 10.04 amd64
2010/7/13 Pablo pablo.f...@gmail.com One more significant(for me) reason for still using 2.6.31, except nvidia-problem, is that I find out that command ps output was somehow changed in subsequent kernels, so steps starts from 3 from http://subversion.ffado.org/wiki/IrqPriorities is not working. Hi Oleg, Just an idea. I use htop to see the processes and kernel threads' priorities. sudo apt-get install htop terminator I run htop in terminator because it uses the F10 to save configuration changes and gnome-terminal uses F10 to show the menus. F2 - Display Options: Disable Hide kernel threads - F10 F6 - Sort by: PRI Hi, Pablo! Thanks for pointing, I will try this way. -- Truly yours, Oleg Ivanenko aka Ash [if it wasn't so sad, it would be funny] -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
