From: Ingo Molnar <mingo@elte.hu>
To: John Sigler <linux.kernel@free.fr>
Cc: linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Pin-pointing the root of unusual application latencies
Date: Wed, 25 Jul 2007 15:38:35 +0200 [thread overview]
Message-ID: <20070725133835.GA17616@elte.hu> (raw)
In-Reply-To: <46A74E05.50504@free.fr>
* John Sigler <linux.kernel@free.fr> wrote:
> > does your test-app have higher priority than softirq--4 ?
>
> PID 4 is [softirq-timer/0] and has priority 50 in SCHED_FIFO. My
> process has priority 80 in SCHED_RR. It is waiting for IRQ10.
>
> My user-space app has higher priority than everything except PID 2
> which is [posix_cpu_timer]
well what priority does the IRQ 10 kernel thread have? It should be prio
80 too if it's in your critical path.
Ingo
next prev parent reply other threads:[~2007-07-25 13:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <469600F7.3060603@free.fr>
2007-07-23 9:53 ` Pin-pointing the root of unusual application latencies Ingo Molnar
2007-07-23 14:14 ` John Sigler
2007-07-23 16:04 ` Ingo Molnar
2007-07-23 16:44 ` John Sigler
2007-07-24 8:31 ` John Sigler
2007-07-24 9:20 ` John Sigler
2007-07-25 13:04 ` John Sigler
2007-07-25 13:05 ` Ingo Molnar
2007-07-25 13:20 ` John Sigler
2007-07-25 13:38 ` Ingo Molnar [this message]
2007-07-25 14:05 ` John Sigler
2007-07-25 15:28 ` Karsten Wiese
2007-07-25 15:46 ` John Sigler
2007-07-25 16:31 ` Karsten Wiese
2007-07-25 17:09 ` Len Brown
2007-07-26 8:35 ` John Sigler
2007-07-26 10:45 ` John Sigler
2007-07-26 12:02 ` John Sigler
2007-07-26 15:16 ` John Sigler
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