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