linux-kernel - Re: balance storm

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Message-ID: <1401265004.9793.19.camel@marge.simpson.net>
Date:	Wed, 28 May 2014 10:16:44 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Libo Chen <libo.chen@...wei.com>
Cc:	tglx@...utronix.de, mingo@...e.hu,
	LKML <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Li Zefan <lizefan@...wei.com>, peterz@...radead.org,
	Huang Qiang <h.huangqiang@...wei.com>
Subject: Re: balance storm

On Wed, 2014-05-28 at 14:54 +0800, Libo Chen wrote: 
> On 2014/5/28 9:53, Mike Galbraith wrote:
> > On Wed, 2014-05-28 at 09:04 +0800, Libo Chen wrote:
> > 
> >> oh yes, no tsc only hpet in my box.
> > 
> > Making poor E5-2658 box a crippled wreck.
> 
> yes,it is. But cpu usage will be down from 15% to 5% when binding cpu, so maybe read_hpet
> is not the root cause.

I don't think anyone will be particularly interested in making kernel
changes based upon the behavior of a broken box.  The problem we were
discussing is real enough though, it's just a question of severity.

-Mike

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