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From: Adrian Hunter <adrian.hunter@intel.com>
To: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>, linux-kernel@vger.kernel.org,
        David Ahern <dsahern@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@gmail.com>, Paul Mackerras <paulus@samba.org>,
        Stephane Eranian <eranian@google.com>,
        John Stultz <john.stultz@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>, Pawel Moll <pawel.moll@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>, Andi Kleen <ak@linux.intel.com>,
        Mathieu Poirier <mathieu.poirier@linaro.org>
Subject: [PATCH V2 0/2] perf/x86: Add ability to sample TSC
Date: Fri, 20 Feb 2015 14:44:07 +0200
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Hi

TSC is needed to synchronize Intel Processor Trace (Intel PT)
with perf event samples. Refer to patch 1 for more details.

There is a description of Intel PT in the Intel Architecture
manuals:

http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html 

With the advent of switching perf_clock to CLOCK_MONOTONIC,
it will not be possible to convert perf_clock directly to/from
TSC. So add the ability to sample TSC instead.

Changes in V2:
    perf: Sample additional clock value
        Rename "Architecture specific clock" to
        "Processor trace clock" 
        Rename PERF_SAMPLE_CLOCK_ARCH -> PERF_SAMPLE_CLOCK_PT etc
        Expand commit message

    perf/x86: Provide TSC for PERF_SAMPLE_CLOCK_PT
        Rename PERF_SAMPLE_CLOCK_ARCH -> PERF_SAMPLE_CLOCK_PT etc
        Expand commit message


Adrian Hunter (2):
      perf: Sample additional clock value
      perf/x86: Provide TSC for PERF_SAMPLE_CLOCK_PT

 arch/x86/include/asm/perf_event.h |  6 ++++++
 arch/x86/kernel/cpu/perf_event.c  | 10 ++++++++++
 include/linux/perf_event.h        |  3 ++-
 include/uapi/linux/perf_event.h   | 19 +++++++++++++++++--
 kernel/events/core.c              | 30 ++++++++++++++++++++++++++++++
 kernel/events/internal.h          |  4 ++++
 6 files changed, 69 insertions(+), 3 deletions(-)


Regards
Adrian