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Message-ID: <82e4877d0712081246x4d788c36i908916185611fa94@mail.gmail.com>
Date: Sat, 8 Dec 2007 15:46:54 -0500
From: "Parag Warudkar" <parag.warudkar@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>
Subject: Re: soft lockup - CPU#1 stuck for 15s! [swapper:0]
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>
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On Dec 8, 2007 3:11 PM, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Parag Warudkar <parag.warudkar@gmail.com> wrote:
>
> > But there are still fluctuations under 100% idle -
>
> do you have CONFIG_HIGH_RES_TIMERS=y?

Yes - NO_HZ=y  and HIGH_RES_TIMERS=y.
My ssh connection still died with hpet=disable although this time I
did not see soft lockup message.
Also it randomly gets stuck - suddenly there is a freeze and I can't
type for seconds.

> these fluctuations would still be OK if they are due to HZ granularity.
>

So are the hpet ones ok too or do they seem off even with HRTIMERS=y?
Just trying to figure out if I should be testing further with hpet
disabled or enabling it is ok.

Parag
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