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From: Gabriel Devenyi <devenyga@mcmaster.ca>
To: ck@vds.kolivas.org
Cc: William Lee Irwin III <wli@holomorphy.com>, linux-kernel@vger.kernel.org
Subject: Re: [ck] Re: Preempt Threshold Measurements
Date: Mon, 12 Jul 2004 22:48:50 -0400	[thread overview]
Message-ID: <200407122248.50377.devenyga@mcmaster.ca> (raw)
In-Reply-To: <20040713024051.GQ21066@holomorphy.com>

Well I'm not particularly educated in kernel internals yet, here's some 
reports from the system when its running.

6ms non-preemptible critical section violated 4 ms preempt threshold starting 
at do_munmap+0xd2/0x140 and ending at do_munmap+0xeb/0x140
 [<c014007b>] do_munmap+0xeb/0x140
 [<c01163b0>] dec_preempt_count+0x110/0x120
 [<c014007b>] do_munmap+0xeb/0x140
 [<c014010f>] sys_munmap+0x3f/0x60
 [<c0103ee1>] sysenter_past_esp+0x52/0x71
6ms non-preemptible critical section violated 4 ms preempt threshold starting 
at do_munmap+0xd2/0x140 and ending at do_munmap+0xeb/0x140
 [<c014007b>] do_munmap+0xeb/0x140
 [<c01163b0>] dec_preempt_count+0x110/0x120
 [<c014007b>] do_munmap+0xeb/0x140
 [<c014010f>] sys_munmap+0x3f/0x60
 [<c0103ee1>] sysenter_past_esp+0x52/0x71
6ms non-preemptible critical section violated 4 ms preempt threshold starting 
at do_munmap+0xd2/0x140 and ending at do_munmap+0xeb/0x140
 [<c014007b>] do_munmap+0xeb/0x140
 [<c01163b0>] dec_preempt_count+0x110/0x120
 [<c014007b>] do_munmap+0xeb/0x140
 [<c014010f>] sys_munmap+0x3f/0x60
 [<c0103ee1>] sysenter_past_esp+0x52/0x71
5ms non-preemptible critical section violated 4 ms preempt threshold starting 
at do_munmap+0xd2/0x140 and ending at do_munmap+0xeb/0x140
 [<c014007b>] do_munmap+0xeb/0x140
 [<c01163b0>] dec_preempt_count+0x110/0x120
 [<c014007b>] do_munmap+0xeb/0x140
 [<c014010f>] sys_munmap+0x3f/0x60
 [<c0103ee1>] sysenter_past_esp+0x52/0x71


-- 
Gabriel Devenyi
devenyga@mcmaster.ca


On Monday 12 July 2004 22:40, William Lee Irwin III wrote:
> On Mon, Jul 12, 2004 at 07:43:25PM -0400, Gabriel Devenyi wrote:
> > Keeping in mind that I'm using the nvidia-kernel drivers, here are my
> > preempt threshold violations.
> > 6ms non-preemptible critical section violated 4 ms preempt threshold
> > starting at kernel_fpu_begin+0xd/0x50 and ending at
> > _mmx_memcpy+0x127/0x170 [<c0241987>] _mmx_memcpy+0x127/0x170
> >  [<c01163b0>] dec_preempt_count+0x110/0x120
> >  [<c0241987>] _mmx_memcpy+0x127/0x170
> >  [<c012d3b5>] load_module+0x835/0x900
> >  [<c013c84e>] unmap_vmas+0x10e/0x1f0
> >  [<c012d4fb>] sys_init_module+0x7b/0x230
> >  [<c0103ee1>] sysenter_past_esp+0x52/0x71
>
> Things tend to be slow and stupid in the interest of robustness during
> system initialization.
>
> I'd suggest ignoring those unless you're specifically interested in boot
> time (in which case you should be doing things for yourself) and focusing
> on ones reported during normal usage after the system is up.
>
>
> -- wli
> _______________________________________________
> ck@vds.kolivas.org
> ck mailing list - unmoderated. Please reply-to-all when posting.
> http://bhhdoa.org.au/mailman/listinfo/ck

  reply	other threads:[~2004-07-13  2:48 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-07-12 23:43 Gabriel Devenyi
2004-07-12 23:59 ` Con Kolivas
2004-07-13  0:15   ` Gabriel Devenyi
2004-07-13  2:40 ` William Lee Irwin III
2004-07-13  2:48   ` Gabriel Devenyi [this message]
2004-07-13  2:54     ` Con Kolivas
2004-07-13  4:01       ` Andrew Morton
2004-07-13  5:51         ` Con Kolivas
2004-07-13  6:14           ` Andrew Morton
2004-07-13  8:03             ` Lee Revell
2004-07-13 10:26             ` Con Kolivas
2004-07-13 21:52             ` Con Kolivas
2004-07-13 10:08         ` William Lee Irwin III
2004-07-13 10:40           ` William Lee Irwin III
2004-07-13 11:07             ` Lenar Lõhmus
2004-07-13 11:13               ` William Lee Irwin III
2004-07-13  2:55     ` [ck] " William Lee Irwin III
2004-07-13  3:09       ` Gabriel Devenyi
2004-07-13  4:07       ` Andrew Morton
2004-07-13  5:34         ` Con Kolivas
2004-07-13  5:48           ` Nick Piggin
2004-07-13 10:14             ` William Lee Irwin III
2004-07-14 10:15 ` [ck] " Jens Bergmann

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