linux-kernel - [PATCH v2 0/7] perf, intel: Add support for PEBS output to Intel PT

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Date:   Wed, 31 Jul 2019 16:58:22 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        kan.liang@...ux.intel.com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH v2 0/7] perf, intel: Add support for PEBS output to Intel PT

Hi Peter,

Third attempt at the PEBS-via-PT feature. The previous ones were [1], [2].
This one addresses review comments in patches 1/7 and 2/7, the tooling
patches are intact, but I'm including them anyway.

The PEBS feature: output to Intel PT stream instead of the DS area. It's
theoretically useful in virtualized environments, where DS area can't be
used. It's also good for those who are interested in instruction trace for
context of the PEBS events. As PEBS goes, it can provide LBR context with
all the branch-related information that PT doesn't provide at the moment.

PEBS records are packetized in the PT stream, so instead of extracting
them in the PMI, we leave it to the perf tool, because real time PT
decoding is not practical.

[1] https://marc.info/?l=linux-kernel&m=155679423430002
[2] https://marc.info/?l=linux-kernel&m=156225605132606

Adrian Hunter (5):
  perf tools: Add aux_source attribute flag
  perf tools: Add itrace option 'o' to synthesize aux-source events
  perf intel-pt: Process options for PEBS event synthesis
  perf tools: Add aux-source config term
  perf intel-pt: Add brief documentation for PEBS via Intel PT

Alexander Shishkin (2):
  perf: Allow normal events to be sources of AUX data
  perf/x86/intel: Support PEBS output to PT

 arch/x86/events/core.c                   | 35 +++++++++
 arch/x86/events/intel/core.c             | 18 +++++
 arch/x86/events/intel/ds.c               | 51 ++++++++++++-
 arch/x86/events/intel/pt.c               |  5 ++
 arch/x86/events/perf_event.h             | 17 +++++
 arch/x86/include/asm/intel_pt.h          |  2 +
 arch/x86/include/asm/msr-index.h         |  4 ++
 include/linux/perf_event.h               | 14 ++++
 include/uapi/linux/perf_event.h          |  3 +-
 kernel/events/core.c                     | 92 ++++++++++++++++++++++++
 tools/include/uapi/linux/perf_event.h    |  3 +-
 tools/perf/Documentation/intel-pt.txt    | 15 ++++
 tools/perf/Documentation/itrace.txt      |  2 +
 tools/perf/Documentation/perf-record.txt |  2 +
 tools/perf/arch/x86/util/intel-pt.c      | 23 ++++++
 tools/perf/util/auxtrace.c               |  4 ++
 tools/perf/util/auxtrace.h               |  3 +
 tools/perf/util/evsel.c                  |  4 ++
 tools/perf/util/evsel.h                  |  2 +
 tools/perf/util/intel-pt.c               | 18 +++++
 tools/perf/util/parse-events.c           |  8 +++
 tools/perf/util/parse-events.h           |  1 +
 tools/perf/util/parse-events.l           |  1 +
 23 files changed, 324 insertions(+), 3 deletions(-)

-- 
2.20.1