From: Daniel Walker <dwalker@mvista.com>
To: kus Kusche Klaus <kus@keba.com>
Cc: Ingo Molnar <mingo@elte.hu>, Lee Revell <rlrevell@joe-job.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: RE: Latency traces I cannot interpret (sa1100, 2.6.15-rc7-rt1)
Date: Mon, 02 Jan 2006 06:14:55 -0800 [thread overview]
Message-ID: <1136211295.22548.7.camel@localhost.localdomain> (raw)
In-Reply-To: <AAD6DA242BC63C488511C611BD51F36732330E@MAILIT.keba.co.at>
On Mon, 2006-01-02 at 08:57 +0100, kus Kusche Klaus wrote:
>
> <idle>-0 0D... 1us+: preempt_schedule_irq (svc_preempt)
> <idle>-0 0.... 5us!: default_idle (cpu_idle)
> <idle>-0 0D..1 8700us+: asm_do_IRQ (c021da48 1a 0)
Your trace appears to be showing an actual latency of 300us . The trace
starts at 8700us . The default_idle line above is showing interrupts are
enable, and preemption is enabled . So the tracing code really should be
ignoring the default_idle line since there is no reason to be tracing.
Daniel
next prev parent reply other threads:[~2006-01-02 14:14 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-02 7:57 Latency traces I cannot interpret (sa1100, 2.6.15-rc7-rt1) kus Kusche Klaus
2006-01-02 14:14 ` Daniel Walker [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-01-05 15:32 kus Kusche Klaus
2006-01-04 9:28 kus Kusche Klaus
2006-01-05 14:30 ` Daniel Walker
2006-01-03 15:40 kus Kusche Klaus
2006-01-03 14:57 kus Kusche Klaus
2006-01-03 15:01 ` Daniel Walker
2006-01-03 8:00 kus Kusche Klaus
2006-01-03 14:16 ` Daniel Walker
2006-01-03 7:27 kus Kusche Klaus
2006-01-02 14:55 kus Kusche Klaus
2006-01-02 15:36 ` Daniel Walker
2006-01-02 16:07 ` Daniel Walker
2006-01-02 14:39 kus Kusche Klaus
2006-01-02 14:44 ` Daniel Walker
2005-12-30 12:40 kus Kusche Klaus
2005-12-30 13:35 ` Daniel Walker
2005-12-30 11:18 kus Kusche Klaus
2005-12-30 10:59 kus Kusche Klaus
2005-12-30 10:35 kus Kusche Klaus
2005-12-30 8:02 kus Kusche Klaus
2005-12-30 7:42 Kai Geek
2005-12-30 18:46 ` Lee Revell
2005-12-30 6:35 kus Kusche Klaus
2005-12-29 15:08 kus Kusche Klaus
2005-12-29 18:25 ` Daniel Walker
2005-12-30 7:29 ` Lee Revell
2005-12-30 7:36 ` Ingo Molnar
2005-12-30 7:44 ` Ingo Molnar
2005-12-30 13:07 ` Daniel Walker
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