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Message-ID: <4DA74C9C.9070609@gmail.com>
Date: Thu, 14 Apr 2011 13:35:56 -0600
From: David Ahern <dsahern@gmail.com>
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To: Cyrill Gorcunov <gorcunov@gmail.com>
CC: Shaun Ruffell <sruffell@digium.com>, Ingo Molnar <mingo@elte.hu>,
        Lin Ming <ming.m.lin@intel.com>, Don Zickus <dzickus@redhat.com>,
        Maciej Rutecki <maciej.rutecki@gmail.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Stephane Eranian <eranian@google.com>,
        Robert Richter <robert.richter@amd.com>,
        lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -tip] perf, x86: fix unknown NMIs on a Pentium4 box
References: <4DA70950.3060102@openvz.org> <20110414174327.GA8863@elte.hu> <20110414174420.GA8950@elte.hu> <4DA733B1.1010702@gmail.com> <20110414181226.GA14390@digium.com> <4DA73AC9.6080901@gmail.com>
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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