From: Ingo Molnar <mingo@elte.hu>
To: Lee Revell <rlrevell@joe-job.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.13-rt12: irqs hard off for 657 usecs
Date: Tue, 11 Oct 2005 21:53:01 +0200 [thread overview]
Message-ID: <20051011195301.GA29042@elte.hu> (raw)
In-Reply-To: <1129056268.4718.1.camel@mindpipe>
* Lee Revell <rlrevell@joe-job.com> wrote:
> > The max latency is close to the period of the timer IRQ. So either it's
> > an instrumentation bug or something really disables IRQs for up to 1/HZ
> > seconds.
>
> I can no longer reproduce this with 2.6.14-rc4-rt1. It seems to have
> been a real IRQs disabled bug (not an instrumentation bug) as I was
> also getting xruns with 2.6.13-rt12.
ok, please re-report if it occurs again. I havent fixed any preemption
bug since -rt12, but maybe as a side-effect of other things? Some false
positive latencies were fixed in the latency tracer, but since you also
got xruns, they must have been real latencies. (albeit saving a long
false-positive latency trace can cause a latency by itself!)
Ingo
prev parent reply other threads:[~2005-10-11 19:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-07 22:38 2.6.13-rt12: irqs hard off for 657 usecs Lee Revell
2005-10-08 11:58 ` Ingo Molnar
2005-10-08 12:33 ` Danny ter Haar
2005-10-08 13:08 ` Felix Oxley
2005-10-08 13:24 ` Danny ter Haar
2005-10-11 11:20 ` Ingo Molnar
2005-10-11 16:28 ` Lee Revell
2005-10-11 18:44 ` Lee Revell
2005-10-11 19:53 ` Ingo Molnar [this message]
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