linux-kernel - Re: soft lockup - CPU#1 stuck for 15s! [swapper:0]

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Message-ID: <20071208201137.GA13451@elte.hu>
Date:	Sat, 8 Dec 2007 21:11:37 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Parag Warudkar <parag.warudkar@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: soft lockup - CPU#1 stuck for 15s! [swapper:0]


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

> But there are still fluctuations under 100% idle -

do you have CONFIG_HIGH_RES_TIMERS=y?

> IDLE
> real    0m1.112s
> real    0m1.131s
> real    0m1.112s
> real    0m1.112s
> real    0m1.139s

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

	Ingo
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