linux-kernel - Re: [PATCH 4/4] perf script: Add script to collect and display IBS samples

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Message-ID: <20120308121924.GA19674@elte.hu>
Date:	Thu, 8 Mar 2012 13:19:24 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Robert Richter <robert.richter@....com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] perf script: Add script to collect and display IBS
 samples


* Robert Richter <robert.richter@....com> wrote:

> > To help your effort we could tentatively put the patches 
> > into a separate tip:perf/ibs topic branch if everyone agrees 
> > otherwise, which can go upstream once it's complete and 
> > usable.
> 
> This would be very helpful for me. So far I see following 
> patches for this on top of today's tip/perf/core (623ec99):
> 
> 08e232d perf, x86: Implement IBS event configuration
> 05efba4 perf, x86: Implement IBS interrupt handler
> b0532b2 perf, x86: Implement IBS pmu control ops
> 56ccf1a perf, x86: Implement 64 bit counter support for IBS
> 98e655c perf tool: Parse general/raw events from sysfs
> aac22da perf tools: Add pmu mappings to header information
> f1f062d perf script: Add script to collect and display IBS samples

I've applied the following 4 kernel patches to perf/x86-ibs:

 db98c5faf8cb: perf/x86: Implement 64-bit counter support for IBS
 4db2e8e6500d: perf/x86: Implement IBS pmu control ops
 b7074f1fbd61: perf/x86: Implement IBS interrupt handler
 510419435c69: perf/x86: Implement IBS event configuration

and pushed it out.

We can apply any tooling changes to this branch as well.

I suspect being able to skid-less profile on AMD CPUs, using 
IBS, would be a useful feature to users. What would be required 
for that to work?

Thanks,

	Ingo
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