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Message-ID: <1347630180.7172.34.camel@twins>
Subject: Re: [RFC][PATCH] perf, intel: Expose SMI_COUNT as a fixed counter
From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: mingo@kernel.org, linux-kernel <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Arnaldo Carvalho de Melo <acme@infradead.org>
Date: Fri, 14 Sep 2012 15:43:00 +0200
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On Wed, 2012-09-12 at 13:27 +0200, Peter Zijlstra wrote:
> Subject: perf, intel: Expose SMI_COUNT as a fixed counter
> From: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Date: Wed Sep 12 13:10:53 CEST 2012
> 
> The Intel SMI_COUNT sadly isn't a proper PMU event but a free-running
> MSR, expose it by creating another fake fixed PMC and another pseudo
> event.

OK, so it looks like this MSR has the same content on all CPUs.. is this
inherent to SMIs or is that just my box being funny?