Date: Sat, 8 Dec 2007 20:13:30 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Parag Warudkar <parag.warudkar@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
       "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
       LKML <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: soft lockup - CPU#1 stuck for 15s! [swapper:0]
Message-ID: <20071208191330.GA21186@elte.hu>
References: <82e4877d0712071453h38795e36of26324a4b123fa6c@mail.gmail.com> <924EFEDD5F540B4284297C4DC59F3DEE38C3C2@orsmsx423.amr.corp.intel.com> <alpine.LFD.0.99999.0712080821220.3070@localhost.localdomain> <82e4877d0712080710g205ba93ag12ee204b15d70fdb@mail.gmail.com> <82e4877d0712080736v12c1e31at9149655ae000fe50@mail.gmail.com> <20071208154755.GA5255@elte.hu> <82e4877d0712080800j6572734ek78a76cf7bb17a7e0@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <82e4877d0712080800j6572734ek78a76cf7bb17a7e0@mail.gmail.com>
User-Agent: Mutt/1.5.17 (2007-11-01)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 692
Lines: 21


* Parag Warudkar <parag.warudkar@gmail.com> wrote:

> >    while :; do time usleep 1111111; done
> >
> > or do these sleeps fluctuate?
> 
> They seem to fluctuate - not sure if that's supposed to be exact or if 
> below variations are normal - This is when my compiles are running -

it's normal for them to fluctuate a little when load goes up and the 
task gets delayed.

'bad' fluctuations are ones that happen when the system is idle.

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/