Re: [PATCH v4 00/22] perf: Add infrastructure and support for Intel PT

From: Pawel Moll
Date: Mon Sep 01 2014 - 13:17:22 EST

On Mon, 2014-09-01 at 17:30 +0100, Peter Zijlstra wrote:
> On Wed, Aug 20, 2014 at 03:35:57PM +0300, Alexander Shishkin wrote:
> > This patchset adds support for Intel Processor Trace (PT) extension [1] of
> > Intel Architecture that allows the capture of information about software
> > execution flow, to the perf kernel infrastructure.

I'm particularly excited about the "to the perf kernel
infrastructure" :-)

> It would also be good if some other archs can comment on this (the
> generic parts obviously). There is the ARM CoreSight stuff

We've got Mathieu Poirier at Linaro working on the drivers for CoreSight
components, with the latest (v5) version here:

but it was mostly intended to have the processor trace decoded using a
separate tool in userspace. I must say that an idea of getting it all
into perf sounds really interesting.

I've copied Mathieu so he can have a look as well. As for me personally,
I'd like to have 48 hours to digest it all. I've just got back from a
very distant time zone and am suffering a monumental jet lag...


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