From: Ingo Molnar <mingo@elte.hu>
To: Mark_H_Johnson@raytheon.com
Cc: linux-kernel@vger.kernel.org, "K.R. Foley" <kr@cybsft.com>,
Felipe Alfaro Solana <lkml@felipe-alfaro.com>,
Daniel Schmitt <pnambic@unu.nu>,
Lee Revell <rlrevell@joe-job.com>
Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q9
Date: Thu, 2 Sep 2004 22:38:05 +0200 [thread overview]
Message-ID: <20040902203804.GA22309@elte.hu> (raw)
In-Reply-To: <OF77CAEAC1.5B07194A-ON86256F03.006FD5A2-86256F03.006FD5AB@raytheon.com>
* Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:
> 00000002 0.003ms (+0.000ms): dummy_switch_tasks (schedule)
> 00000002 0.003ms (+0.000ms): schedule (worker_thread)
> 00000002 0.003ms (+0.000ms): schedule (worker_thread)
> 00000002 0.004ms (+0.000ms): schedule (worker_thread)
> 00000002 0.004ms (+0.000ms): schedule (worker_thread)
> 00000002 0.004ms (+0.000ms): schedule (worker_thread)
> 00000002 0.004ms (+0.274ms): schedule (worker_thread)
> 04000002 0.279ms (+0.000ms): __switch_to (schedule)
a quick suggestion: could you add this near the top of sched.c (below
the #include lines):
#define static
this will turn off all inlining and makes the scheduler-internal
functions visible. If there's any scheduler-internal overhead we should
see it. Maybe this is the CR3 flush (switch_mm()) - but 274 usecs is
still excessive ...
Ingo
next prev parent reply other threads:[~2004-09-03 3:24 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-02 20:21 [patch] voluntary-preempt-2.6.9-rc1-bk4-Q9 Mark_H_Johnson
2004-09-02 20:38 ` Ingo Molnar [this message]
2004-09-02 22:43 ` Ingo Molnar
2004-09-03 9:09 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2004-09-03 18:28 Mark_H_Johnson
2004-09-03 18:33 ` Ingo Molnar
2004-09-03 15:33 Mark_H_Johnson
2004-09-04 0:04 ` Lee Revell
2004-09-04 16:52 ` Alan Cox
2004-09-04 18:05 ` Lee Revell
2004-09-03 13:42 Mark_H_Johnson
2004-08-30 19:13 [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 Mark_H_Johnson
2004-09-02 6:33 ` Ingo Molnar
2004-09-02 6:55 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q8 Ingo Molnar
2004-09-02 11:10 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q9 Ingo Molnar
2004-09-02 12:14 ` Thomas Charbonnel
2004-09-02 13:16 ` Thomas Charbonnel
2004-09-02 13:23 ` Ingo Molnar
2004-09-02 14:38 ` Thomas Charbonnel
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