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From: Thomas Gleixner <tglx@linutronix.de>
To: Iratxo Pichel Ortiz <ipichel@albentia.com>
Cc: linux-rt-users <linux-rt-users@vger.kernel.org>,
	"Noelia Morón" <nmoron@albentia.com>,
	"'Rodrigo Partearroyo'" <rpartearroyo@albentia.com>
Subject: Re: NOHZ: local_softirq_pending
Date: Thu, 18 Jun 2009 00:03:32 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.00.0906180001210.2800@localhost.localdomain> (raw)
In-Reply-To: <4A37E6D1.5010207@albentia.com>

On Tue, 16 Jun 2009, Iratxo Pichel Ortiz wrote:
> I have tried disabling the CONFIG_NOHZ kernel option. Of course the trace is
> gone, but the weird behavior is still there. When I run my software without
> load from the network, the main task of the system experiences runtimes of
> about 700us. When I load the system, there are latencies of 50700us, so the
> 50ms delay is again there, and again the time when the task finishes is always
> X.296, 1 jiffy after the "NOHZ: pending..." was shown with CONFIG_NOHZ
> enabled.

What kind of system is this ? 

Can you please check whether you can reproduce with NOHZ=y and function
tracer enabled ?

That would be great.

Thanks,

	tglx

  reply	other threads:[~2009-06-17 22:03 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-14 15:28 NOHZ: local_softirq_pending Iratxo Pichel Ortiz
2009-06-14 19:50 ` Iratxo Pichel Ortiz
2009-06-15 13:19   ` Thomas Gleixner
2009-06-15 14:38     ` Iratxo Pichel Ortiz
     [not found]       ` <8e6b7a710906160101x6a8ae9d5qa7638627f513278@mail.gmail.com>
2009-06-16  8:26         ` NOHZ: local_softirq_pending - More info without need for specific code Iratxo Pichel Ortiz
     [not found]         ` <4A376450.5020209@albentia.com>
2009-06-16  9:26           ` Iratxo Pichel Ortiz
2009-06-16 14:45             ` NOHZ: local_softirq_pending Iratxo Pichel Ortiz
2009-06-16 18:39               ` Iratxo Pichel Ortiz
2009-06-17 22:03                 ` Thomas Gleixner [this message]
2009-06-17 22:35                   ` Iratxo Pichel Ortiz
2009-06-17 23:46                     ` Thomas Gleixner
2009-06-18  0:33                       ` Iratxo Pichel Ortiz
2009-06-18  8:57                         ` Thomas Gleixner
2009-06-18 16:52                           ` Iratxo Pichel Ortiz

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