Re: XRUN traces

Lee Revell
2004-07-17T01:04:27Z

On Wed, 2004-07-14 at 02:56, Andrew Morton wrote:
> Lee Revell <rlrevell@joe-job.com> wrote:
> >
> > This is the only one I am still seeing that does not involve
> > get_user_pages(). I am seeing quite a lot with get_user_pages, but very
> > few of these:
>
> get_user_pages() shold be fixed in rc1-mm1. But that kernel is busted, so
> wait until I have a fix.
>
>

With 2.6.8-rc1-mm1, when I have started a jackd process in the playback
direction, and launch another in the capture direction, I can reliably
trigger a ~150ms XRUN in the first process. The duration of the XRUN
is exactly the same each time, it is probably a funciton of the amount
of memory being mlockall()'ed.

Otherwise this kernel seems pretty good.

Jul 16 20:57:29 mindpipe kernel: ALSA /home/rlrevell/cvs/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D2c
Jul 16 20:57:29 mindpipe kernel: [dump_stack+23/32] dump_stack+0x17/0x20
Jul 16 20:57:29 mindpipe kernel: [__crc_totalram_pages+115469/3518512] snd_pcm_period_elapsed+0x2c7/0x400 [snd_pcm]
Jul 16 20:57:29 mindpipe kernel: [__crc_totalram_pages+180567/3518512] snd_emu10k1_interrupt+0xd1/0x3c0 [snd_emu10k1]
Jul 16 20:57:29 mindpipe kernel: [handle_IRQ_event+51/96] handle_IRQ_event+0x33/0x60
Jul 16 20:57:29 mindpipe kernel: [do_IRQ+165/368] do_IRQ+0xa5/0x170
Jul 16 20:57:29 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jul 16 20:57:29 mindpipe kernel: [__alloc_pages+167/816] __alloc_pages+0xa7/0x330
Jul 16 20:57:29 mindpipe kernel: [do_anonymous_page+96/384] do_anonymous_page+0x60/0x180
Jul 16 20:57:29 mindpipe kernel: [do_no_page+78/784] do_no_page+0x4e/0x310
Jul 16 20:57:29 mindpipe kernel: [handle_mm_fault+193/368] handle_mm_fault+0xc1/0x170
Jul 16 20:57:29 mindpipe kernel: [get_user_pages+337/960] get_user_pages+0x151/0x3c0
Jul 16 20:57:29 mindpipe kernel: [make_pages_present+104/144] make_pages_present+0x68/0x90
Jul 16 20:57:29 mindpipe kernel: [mlock_fixup+141/176] mlock_fixup+0x8d/0xb0
Jul 16 20:57:29 mindpipe kernel: [do_mlockall+112/144] do_mlockall+0x70/0x90
Jul 16 20:57:29 mindpipe kernel: [sys_mlockall+150/160] sys_mlockall+0x96/0xa0
Jul 16 20:57:29 mindpipe kernel: [syscall_call+7/11] syscall_call+0x7/0xb

Lee