linux-kernel - Re: [PATCH v0 00/71] perf: Add support for Intel Processor Trace

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Message-ID: <20131211130448.GA2480@gmail.com>
Date:	Wed, 11 Dec 2013 14:04:48 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH v0 00/71] perf: Add support for Intel Processor Trace


* Alexander Shishkin <alexander.shishkin@...ux.intel.com> wrote:

> Hi,
> 
> 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 and userspace 
> infrastructure. We provide an abstraction for it called "itrace" for 
> "instruction trace" ([2]).

Ok, this feature looks rather interesting.

On the hardware side this is essentially BTS (Branch Trace Store) on 
steroids (with many extensions), right?

Thanks,

	Ingo
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