From: William Lee Irwin III <wli@holomorphy.com>
To: Gabriel Devenyi <devenyga@mcmaster.ca>
Cc: ck@vds.kolivas.org, linux-kernel@vger.kernel.org
Subject: Re: Preempt Threshold Measurements
Date: Mon, 12 Jul 2004 19:40:51 -0700 [thread overview]
Message-ID: <20040713024051.GQ21066@holomorphy.com> (raw)
In-Reply-To: <200407121943.25196.devenyga@mcmaster.ca>
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
next prev parent reply other threads:[~2004-07-13 2:40 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-12 23:43 Preempt Threshold Measurements 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 [this message]
2004-07-13 2:48 ` [ck] " Gabriel Devenyi
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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