linux-kernel - Re: [PATCH -tip] perf, x86: fix unknown NMIs on a Pentium4 box

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Date:	Thu, 14 Apr 2011 13:35:56 -0600
From:	David Ahern <dsahern@...il.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	Shaun Ruffell <sruffell@...ium.com>, Ingo Molnar <mingo@...e.hu>,
	Lin Ming <ming.m.lin@...el.com>,
	Don Zickus <dzickus@...hat.com>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	Robert Richter <robert.richter@....com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] perf, x86: fix unknown NMIs on a Pentium4 box

On 04/14/11 12:19, Cyrill Gorcunov wrote:
> On 04/14/2011 10:12 PM, Shaun Ruffell wrote:

> Btw, Shaun, perf top wont work on P4 for a while (since it needs nmi-watchdog
> to be disabled).
> 

perf-top defaults to H/W cycles event. Just need to force it to S/W
events (the fallback for systems that do not support cycles event):
   perf top -e cpu-clock

David
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