linux-kernel - Re: [PATCH 8/9] clocksource: Improve unstable clocksource detection

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Message-ID: <20150901153518.6de77eb0@gandalf.local.home>
Date:	Tue, 1 Sep 2015 15:35:18 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Shaohua Li <shli@...com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Prarit Bhargava <prarit@...hat.com>,
	Richard Cochran <richardcochran@...il.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	"Ingo Molnar" <mingo@...nel.org>,
	Clark Williams <williams@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 8/9] clocksource: Improve unstable clocksource detection

On Tue, 1 Sep 2015 11:14:17 -0700
Shaohua Li <shli@...com> wrote:

> > You think that blocking softirq execution for 42.9 seconds is normal?
> > Seems we are living in a different universe.
> 
> I don't say it's normal. I say it's not hard to trigger.
> 
> > > it's just VM off. A softirq can hog the cpu.
> > 

Please provide a test case that shows the softirq hogging the cpu for
over 40 seconds.

-- Steve
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