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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

  reply	other threads:[~2007-07-25 13:38 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-12 10:22 Pin-pointing the root of unusual application latencies John Sigler
2007-07-13  8:32 ` John Sigler
2007-07-23  8:25   ` John Sigler
2007-07-23  9:53 ` Ingo Molnar
2007-07-23 14:14   ` John Sigler
2007-07-23 16:04     ` Ingo Molnar
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 13:05             ` 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 14:13                   ` Alessio Igor Bogani
2007-07-25 14:35                     ` John Sigler
2007-07-25 15:00                       ` Alessio Igor Bogani
2007-07-25 15:21                         ` John Sigler
2007-07-25 15:35                           ` Alessio Igor Bogani
2007-07-25 15:53                             ` 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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