December 2017 - Arch-proaudio - lists.archlinux.org

[arch-proaudio] ardour buildscript
by Joakim Hernberg 09 Feb '18

09 Feb '18

I built Ardour 5.12 the other day and came up with some inconsistencies, so I asked rgareus one of the devs for advice. He gave me the following: 1. sed -i 's/python ${SRC}/python2 ${SRC}/' libs/pbd/wscript is not needed this has been fixed in the source a long time. The only thing we have to do is to run python2 waf configure as the script already does. 2. configure it like this: configure --prefix=/usr --configdir=/etc --with-backends="jack,alsa,dummy" \ --libjack=weak \ --optimize \ --cxx11 \ --ptformat \ --no-phone-home He said there is no need to build the documentation on the users machine. Add the dummy backend which improves on functionality. Optionally add the experimental --ptformat option which gives initial support for opening pro tools session in ardour. This is a work in progress but they have understood the XOR based encryption and are in the process of clean room reverse engineering the format. -- Joakim

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[arch-proaudio] limits.conf for jack
by David Runge 28 Dec '17

28 Dec '17

Hey all, I'd like you to have a look at this bug [1]. Although, I think the whole issue with skype and pulse is a non-issue really (and probably somehow long fixed), the packaging and use of the group being allowed the realtime settings is not. As both jack and jack2 ship the same limits.conf and udev rule, I suggest to create a "meta" package "realtime" or similar, which in turn those two packages will depend upon and will ship the configuration files. Addditionally, it should create the system group realtime (using systemd-sysusers), to decouple the realtime priorities from the audio group. Best, David P.S.: Also, jack2-1.9.12 is out. Use [community-testing] to try it out. [1] https://bugs.archlinux.org/task/46058 -- https://sleepmap.de

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Re: [arch-proaudio] cyclictest
by LX 28 Dec '17

28 Dec '17

Hi Ralf, Here are my results with various versions of the RT kernel + latest stock: [root@pill-mobile4 gimmeapill]# cat /proc/cpuinfo | grep "model name" | uniq model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz Linux 4.9.40-rt30-1-rt [root@pill-mobile4 gimmeapill]# cyclictest -S -m -p98 # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 0.10 0.06 0.02 1/161 470 T: 0 ( 463) P:98 I:1000 C: 57257 Min: 2 Act: 4 Avg: 4 Max: 12 T: 1 ( 464) P:98 I:1500 C: 38168 Min: 2 Act: 4 Avg: 4 Max: 11 T: 2 ( 465) P:98 I:2000 C: 28624 Min: 3 Act: 5 Avg: 4 Max: 12 T: 3 ( 466) P:98 I:2500 C: 22897 Min: 3 Act: 4 Avg: 4 Max: 11 Linux 4.11.12-rt14-1-rt [root@pill-mobile4 gimmeapill]# cyclictest -S -m -p98 # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 0.02 0.02 0.00 1/210 573 T: 0 ( 570) P:98 I:1000 C: 47702 Min: 2 Act: 4 Avg: 3 Max: 13 T: 1 ( 571) P:98 I:1500 C: 31794 Min: 2 Act: 4 Avg: 3 Max: 12 T: 2 ( 572) P:98 I:2000 C: 23844 Min: 2 Act: 4 Avg: 3 Max: 10 T: 3 ( 573) P:98 I:2500 C: 19072 Min: 2 Act: 4 Avg: 4 Max: 13 Linux 4.14.6-rt7-1-rt [root@pill-mobile4 gimmeapill]# cyclictest -S -m -p98 # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 0.10 0.06 0.02 1/161 521 T: 0 ( 515) P:98 I:1000 C: 50834 Min: 2 Act: 5 Avg: 3 Max: 14 T: 1 ( 516) P:98 I:1500 C: 33887 Min: 2 Act: 3 Avg: 3 Max: 15 T: 2 ( 517) P:98 I:2000 C: 25412 Min: 2 Act: 3 Avg: 3 Max: 14 T: 3 ( 518) P:98 I:2500 C: 20327 Min: 3 Act: 3 Avg: 4 Max: 14 Linux 4.14.7-1-ARCH [root@pill-mobile4 gimmeapill]# cyclictest -S -m -p98 # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 0.13 0.08 0.03 1/139 492 T: 0 ( 489) P:98 I:1000 C: 27676 Min: 2 Act: 6 Avg: 3 Max: 16 T: 1 ( 490) P:98 I:1500 C: 18453 Min: 2 Act: 5 Avg: 4 Max: 21 T: 2 ( 491) P:98 I:2000 C: 13839 Min: 3 Act: 5 Avg: 3 Max: 9 T: 3 ( 492) P:98 I:2500 C: 11070 Min: 3 Act: 4 Avg: 4 Max: 13 BR, LX

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[arch-proaudio] Save the date: Linux Audio Conference 2018
by David Runge 23 Dec '17

23 Dec '17

[Apologies for cross-postings] [Please distribute] Save the date: Linux Audio Conference 2018 The 2018 Linux Audio Conference will take place at c-base, Berlin 7th -11th June 2018 The LAC 2018 will feature a full program of talks, workshops and music. The official call for papers and works will be sent shortly after the winter break - so use the quiet of the holidays to think about possible submissions. All relevant information will be made available on: http://lac.linuxaudio.org/2018/ The LAC 2018 Organizing Team -- https://sleepmap.de

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[arch-proaudio] cyclictest
by Ralf Mardorf 22 Dec '17

22 Dec '17

Hi, I wonder what results you get, if you run cyclictest on your machine, what ever kernel you are using. I've done this for 4.14.6-rt7 from https://aur.archlinux.org/pkgbase/linux-rt [1] and for 4.14.6-rt7 less patched, using a different config [2]. Regards, Ralf [1] [rocketmouse@archlinux ~]$ cat /var/log/rtest/rtest-20171221_195747.log sudo hwinfo --cpu | grep -m1 Model Model: 6.60.3 "Intel(R) Celeron(R) CPU G1840 @ 2.80GHz" uname -a Linux archlinux 4.14.6-rt7-1-rt #1 SMP PREEMPT RT Wed Dec 20 22:37:18 CET 2017 x86_64 GNU/Linux cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor performance performance [2017-12-21 19:57] cyclictest -S -m -p98 WARN: open /dev/cpu_dma_latency: Permission denied policy: fifo: loadavg: 0.13 0.09 0.02 1/208 4690 T: 0 ( 1245) P:98 I:1000 C:35539474 Min: 1 Act: 31 Avg: 27 Max: 76 T: 1 ( 1246) P:98 I:1500 C:23692982 Min: 1 Act: 31 Avg: 28 Max: 83 [2017-12-22 05:50] [2] [rocketmouse@archlinux ~]$ cat /var/log/rtest/rtest-20171221_085832.log sudo hwinfo --cpu | grep -m1 Model Model: 6.60.3 "Intel(R) Celeron(R) CPU G1840 @ 2.80GHz" uname -a Linux archlinux 4.14.6-rt7-1-rt-pussytoes #1 SMP PREEMPT RT Tue Dec 19 05:51:37 CET 2017 x86_64 GNU/Linux cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor performance performance [2017-12-21 08:58] cyclictest -S -m -p98 WARN: open /dev/cpu_dma_latency: Permission denied policy: fifo: loadavg: 0.36 0.26 0.11 1/217 30782 T: 0 (30748) P:98 I:1000 C:5147453 Min: 1 Act: 40 Avg: 28 Max: 68 T: 1 (30749) P:98 I:1500 C:3431635 Min: 1 Act: 32 Avg: 31 Max: 61 [2017-12-21 10:24] -- $ pacman -Q linux{,-rt{,-cornflower,-pussytoes}}|awk '{print $2}' 4.14.7-1 4.14.6_rt7-1 4.11.12_rt16-1 4.14.6_rt7-1

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[arch-proaudio] Latest LinuxSampler
by Jeanette C. 20 Dec '17

20 Dec '17

Hey hey, I was just wondering, if there are plans to include the latest LinuxSampler release in Arch, in the near future? Where should I be looking out for? Could I help by testing something? Best wishes, Jeanette -------- * website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c For whatever reason, I feel like I've been wanting you all my life <3 (Britney Spears)

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[arch-proaudio] Test my rebuilds
by David Runge 10 Dec '17

10 Dec '17

Hi all, I spent some time to rebuild all packages I inherited from speps [1] [2]. If you have some time to spare, I'd be very happy if you could test them and report any breakage, before I move them to [community] [3]! Best, David [1] https://www.archlinux.org/packages/?sort=3D&repo=Community-Testing&q=&maint… [2] https://www.archlinux.org/packages/?sort=3D&repo=Multilib-Testing&q=&mainta… [3] https://www.archlinux.org/packages/?sort=3D&repo=Community&q=&maintainer=dv… -- https://sleepmap.de

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Re: [arch-proaudio] Kernel with extended RT capabilities
by Ralf Mardorf 08 Dec '17

08 Dec '17

Hi, my apologies for breaking the thread. I subscribed a few minutes ago and read the archive, IOW I didn't receive a mail with the required header for this reply. In my experiences it's wise to keep several rt patched kernel versions, just in case a patched kernel should cause issues. The mainline/stable as well as the longterm rt kernel from AUR as well as those provided by the Arch audio repo a while back, not always worked with e.g. some old AMD machines or at least not without a tailored config. For my new Intel machine I currently try to keep up with the latest patch from the 4.11/, 4.13/ and 4.14/ tree [1]. I didn't update 4.14 to the current version, since there's is an issue with building the modules for the version of virtualbox I'm using. For the Arch repository it wouldn't be as easy to maintain a rt patched kernel, as it is to provide a vanilla kernel with a config that is good for pro-audio, when booted with threadirqs. Ubuntu provides a quasi vanilla kernel "lowlatency", other than linux from Arch's core, it comes with the feature, that it doesn't require a bootloader entry "treadirqs" [3]. Btw. it wouldn't be possible to stay in sync with linux and linux-rt from Arch's core, since the rt project doesn't provide a patch for each available kernel release. Regards, Ralf [1] [root@moonstudio weremouse]# systemd-nspawn -qD /mnt/archlinux/ 2>/dev/null pacman -Q linux-rt{,-cornflower,-pussytoes}|awk '{print $2}' 4.13.13_rt5-1 4.11.12_rt16-1 4.14_rt1-1 [2] [root@moonstudio weremouse]# apt list -qq linux-lowlatency linux-lowlatency/xenial-updates,xenial-security,now 4.4.0.101.106 amd64 [installed] [3] [root@moonstudio weremouse]# grep threadirqs /mnt/archlinux/boot/syslinux/syslinux.cfg MENU LABEL Arch Linux ^threadirqs APPEND root=LABEL=archlinux ro threadirqs

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[arch-proaudio] Kernel with extended RT capabilities
by Jeanette C. 08 Dec '17

08 Dec '17

Hey hey, thanks for the new list! <3 I wondered, if there is a kernel for Arch that has all the RT support configured/patched? I didn't spot any in the repositories (both with pacman and AUR). TIA and best wishes, Jeanette -------- * website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c E-mail my heart and say our love will never die... <3 (Britney Spears)

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