Messages in this thread | | | Subject | Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch | From | Lee Revell <> | Date | Sat, 24 Jul 2004 00:58:45 -0400 |
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On Tue, 2004-07-20 at 08:19, Jens Axboe wrote: > On Tue, Jul 20 2004, Ingo Molnar wrote: > > > How much I/O do you allow to be in flight at once? It seems like by > > > decreasing the maximum size of I/O that you handle in one interrupt > > > you could improve this quite a bit. Disk throughput is good enough, > > > anyone in the real world who would feel a 10% hit would just throw > > > hardware at the problem. > > > > i'm not sure whether this particular value (max # of sg-entries per IO > > op) is runtime tunable. Jens? Might make sense to enable elvtune-alike > > tunability of this value. > > elvtune is long dead :-) >
This one occured several times while bonnie was cleaning up after itself:
ALSA /home/rlrevell/cvs/alsa/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D2c [<c01066a7>] dump_stack+0x17/0x20 [<de935377>] snd_pcm_period_elapsed+0x2c7/0x400 [snd_pcm] [<de945211>] snd_emu10k1_interrupt+0xd1/0x3c0 [snd_emu10k1] [<c01078c3>] handle_IRQ_event+0x33/0x60 [<c0107c05>] do_IRQ+0xa5/0x170 [<c0106268>] common_interrupt+0x18/0x20 [<c0161b81>] shrink_dcache_parent+0x21/0x30 [<c0159d69>] d_unhash+0x39/0xb0 [<c0159e4c>] vfs_rmdir+0x6c/0x1b0 [<c015a05f>] sys_rmdir+0xcf/0xf0 [<c0106047>] syscall_call+0x7/0xb ALSA /home/rlrevell/cvs/alsa/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p [<c01066a7>] dump_stack+0x17/0x20 [<de935377>] snd_pcm_period_elapsed+0x2c7/0x400 [snd_pcm] [<de945477>] snd_emu10k1_interrupt+0x337/0x3c0 [snd_emu10k1] [<c01078c3>] handle_IRQ_event+0x33/0x60 [<c0107c05>] do_IRQ+0xa5/0x170 [<c0106268>] common_interrupt+0x18/0x20 [<c0161b81>] shrink_dcache_parent+0x21/0x30 [<c0159d69>] d_unhash+0x39/0xb0 [<c0159e4c>] vfs_rmdir+0x6c/0x1b0 [<c015a05f>] sys_rmdir+0xcf/0xf0 [<c0106047>] syscall_call+0x7/0xb
Lee
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