linux-kernel - Re: [PATCH] nohz1: Documentation

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Message-ID: <514B464A.50700@linux.intel.com>
Date:	Thu, 21 Mar 2013 10:41:30 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	paulmck@...ux.vnet.ibm.com
CC:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Rob Landley <rob@...dley.net>, linux-kernel@...r.kernel.org,
	josh@...htriplett.org, zhong@...ux.vnet.ibm.com,
	khilman@...aro.org, geoff@...radead.org, tglx@...utronix.de
Subject: Re: [PATCH] nohz1: Documentation

On 3/21/2013 10:18 AM, Paul E. McKenney wrote:
> 	o	Use the "idle=poll" boot parameter.  However, please note
> 		that use of this parameter can cause your CPU to overheat,
> 		which may cause thermal throttling to degrade your
> 		latencies --and that this degradation can be even worse
> 		than that of dyntick-idle.

it also disables (effectively) Turbo Mode on Intel cpus... which can cost you a serious percentage of performance
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