2.6.8-rc2-mm2, staircase sched and ESD
The 2.6.8-rc2-mm2 kernel has the staircase scheduler, right? Well, I am seeing an odd thing. At least, I think it is odd.
I'm running Fedora Core 2 and playing music with Rhythmbox. When I watch top sorted by priority, I see esd slowly increase its priority until it reaches 38, then it goes back to 20. ESD is only using 1-2% CPU.
This is causing a problem because doing just about anything in X, like bring up a new window or drag a window causes the sound to just stop.
Why does ESD's priority keep climbing?
Oh yes, this does not happen if I change /proc/sys/fs/interactive to 0. When it is 0, X's priority climbs faster than ESDs and does not cause the problem.
Signature · 1 line
Zan Lynx <[email protected]>
Quoted 8 lines · Zan Lynx
The 2.6.8-rc2-mm2 kernel has the staircase scheduler, right? Well, I am seeing an odd thing. At least, I think it is odd.
I'm running Fedora Core 2 and playing music with Rhythmbox. When I watch top sorted by priority, I see esd slowly increase its priority until it reaches 38, then it goes back to 20. ESD is only using 1-2% CPU.
Quoted 7 lines
This is causing a problem because doing just about anything in X, like bring up a new window or drag a window causes the sound to just stop.
Why does ESD's priority keep climbing?
Oh yes, this does not happen if I change
/proc/sys/fs/interactiveto 0. When it is 0, X's priority climbs faster than ESDs and does not cause the problem.
Yes this is a known issue with esd. It basically wakes up far too frequently for it's own good. esd should not be required with alsa drivers and 2.6 since alsa supports sharing of the sound card / mixing on it's own so adding esd adds an unnecessary layer to the sound drivers. It ends up doing this:esd->oss emulation->alsa.
Cheers,
Con
Quoted 13 lines · Con Kolivas
Quoted 11 lines · Zan Lynx
The 2.6.8-rc2-mm2 kernel has the staircase scheduler, right? Well, I am seeing an odd thing. At least, I think it is odd.
I'm running Fedora Core 2 and playing music with Rhythmbox. When I watch top sorted by priority, I see esd slowly increase its priority until it reaches 38, then it goes back to 20. ESD is only using 1-2% CPU.
This is causing a problem because doing just about anything in X, like bring up a new window or drag a window causes the sound to just stop.
Quoted 9 lines
Quoted 4 lines
Why does ESD's priority keep climbing?
Oh yes, this does not happen if I change
/proc/sys/fs/interactiveto 0. When it is 0, X's priority climbs faster than ESDs and does not cause the problem.Yes this is a known issue with esd. It basically wakes up far too frequently for it's own good. esd should not be required with alsa drivers and 2.6 since alsa supports sharing of the sound card / mixing on it's own so adding esd adds an unnecessary layer to the sound drivers. It ends up doing this:
esd->ossemulation->alsa.
Even so, this would be a showstopper if we're talking about replacing the 2.6 scheduler, wouldn't you agree?
Quoted 19 lines · Con Kolivas
Quoted 8 lines · Zan Lynx
The 2.6.8-rc2-mm2 kernel has the staircase scheduler, right? Well, I am seeing an odd thing. At least, I think it is odd.
I'm running Fedora Core 2 and playing music with Rhythmbox. When I watch top sorted by priority, I see esd slowly increase its priority until it reaches 38, then it goes back to 20. ESD is only using 1-2% CPU.
Quoted 8 lines
This is causing a problem because doing just about anything in X, like bring up a new window or drag a window causes the sound to just stop.
Why does ESD's priority keep climbing?
Oh yes, this does not happen if I change
/proc/sys/fs/interactiveto 0. When it is 0, X's priority climbs faster than ESDs and does not cause the problem.
Quoted 7 lines
Yes this is a known issue with esd. It basically wakes up far too frequently for it's own good. esd should not be required with alsa drivers and 2.6 since alsa supports sharing of the sound card / mixing on it's own so adding esd adds an unnecessary layer to the sound drivers. It ends up doing this:
esd->ossemulation->alsa.
This is not entirely true - or at least not on a more modern distro that uses alsa:
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nosferatu root # lsof | grep esd | grep /dev
esd 8886 azarah mem CHR 116,16 6226 /dev/snd/pcmC0D0p
esd 8886 azarah 0r CHR 1,3 756 /dev/null
esd 8886 azarah 1u CHR 4,4 1193 /dev/vc/4
esd 8886 azarah 2u CHR 4,4 1193 /dev/vc/4
esd 8886 azarah 29u CHR 116,16 6226 /dev/snd/pcmC0D0p
esd 8886 azarah 30r CHR 116,33 6058 /dev/snd/timer
esd 16748 azarah mem CHR 116,16 6226 /dev/snd/pcmC0D0p
esd 16748 azarah 29u CHR 116,16 6226 /dev/snd/pcmC0D0p
nosferatu root # ldd `which esd` | grep asound
libasound.so.2 => /usr/lib/libasound.so.2 (0x41b0d000)nosferatu root #
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Signature · 1 line
Martin Schlemmer