(att. ismail) [announce] [patch] Voluntary Kernel Preemption Patch
Quoted 7 lines
Tested on 2.6.7-bk20, Pentium3 700 mhz, 576 mb RAM
I did cp -rf
big_foldernew_folder. Then opened up a gui ftp client and music in amarok started to skip like for 2-3 seconds.Btw Amarok uses Artsd ( KDE Sound Daemon ) which in turn set to use Jack Alsa Backend.
Are you sure that both artsd and jackd is run as RT processes? artsd needs 'artswrapper' as suid root and option in kconfig enabled. (never versions of amarok warns the user if this is not the case...)
[You can try to run the same as root to be sure]
But it does sound as a io scheduler problem - but 2-3 seconds!?
/RogerL
Signature · 3 lines
Roger Larsson Skellefteå Sweden
Quoted 2 lines · Roger Larsson
But it does sound as a io scheduler problem - but 2-3 seconds!?
nothing particularly unusual on my system ... when an updatedb or a 'cvs up' or 'make install' of kde are running i often get hangs of up to 10 seconds (not the sound, though, as xmms with oss output seems less susceptible to this, but "random" other processes freeze hard for that time). and with 2.4 ... errm ... 30 seconds are usual, and 60 seconds are still not exceptional.
for the record: i have 1GB of ram, no swap, and reasonably fast disks (and yes, udma is enabled ;).
greetings
Signature · 3 lines
Hi! I'm a .signature virus! Copy me into your ~/.signature, please! -- Chaos, panic, and disorder - my work here is done.
I made artswrapper suid root. It's still skipping during cp -rf big_folder copy operation. Jack is running with --realtime and I use realtime lsm module to give it realtime capabilities.
doing a modprobe realtime gid=17
where 17 is "audio" group which happens to contain "cartman" user too.
Quoted 28 lines · Roger Larsson
Quoted 7 lines
Tested on 2.6.7-bk20, Pentium3 700 mhz, 576 mb RAM
I did cp -rf
big_foldernew_folder. Then opened up a gui ftp client and music in amarok started to skip like for 2-3 seconds.Btw Amarok uses Artsd ( KDE Sound Daemon ) which in turn set to use Jack Alsa Backend.
Are you sure that both artsd and jackd is run as RT processes? artsd needs 'artswrapper' as suid root and option in kconfig enabled. (never versions of amarok warns the user if this is not the case...)
[You can try to run the same as root to be sure]
But it does sound as a io scheduler problem - but 2-3 seconds!?
/RogerL
--
Roger Larsson
Skellefteå
Sweden
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Signature · 1 line
Time is what you make of it