linux-kernel - [PATCH 00/12] perf intel-pt: Add more support for VMs

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Date:   Thu, 29 Apr 2021 15:58:42 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, Andi Kleen <ak@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 00/12] perf intel-pt: Add more support for VMs

Hi

Previously, limited support was added for timeless decoding of VM traces.

Primarily, these patches add support for decoding traces of virtual
machines using timestamps, assuming the VMX TSC Offset is unchanging
during perf record, and VMX TSC Scaling is not used.

The first 3 patches add an itrace option to allow timeless decoding
even if timestamps have been recorded.

The next 2 patches add an option to perf inject to do "VM Time Correlation"
i.e. sort out the timestamps.

There are 5 preparation patches, then the main changes in patch
"perf intel-pt: Add VM Time Correlation to decoder".

The final patch adds documentation which provides an example.


Adrian Hunter (12):
      perf auxtrace: Add Z itrace option for timeless decoding
      perf intel-pt: Move synth_opts initialization earlier
      perf intel-pt: Support Z itrace option for timeless decoding
      perf inject: Add facility to do in place update
      perf inject: Add --vm-time-correlation option
      perf auxtrace: Allow buffers to be mapped read / write
      perf intel-pt: Let overlap detection handle VM timestamps
      perf intel-pt: Add a tree for VMCS information
      perf intel-pt: Pass the first timestamp to the decoder
      perf intel-pt: Better 7-byte timestamp wraparound logic
      perf intel-pt: Add VM Time Correlation to decoder
      perf intel-pt: Parse VM Time Correlation options and set up decoding

 tools/perf/Documentation/itrace.txt                |   1 +
 tools/perf/Documentation/perf-inject.txt           |  10 +
 tools/perf/Documentation/perf-intel-pt.txt         | 114 +++-
 tools/perf/builtin-inject.c                        |  73 ++-
 tools/perf/util/auxtrace.c                         |   8 +-
 tools/perf/util/auxtrace.h                         |  14 +-
 tools/perf/util/data.c                             |   3 +-
 tools/perf/util/data.h                             |   1 +
 tools/perf/util/header.c                           |   5 +
 .../perf/util/intel-pt-decoder/intel-pt-decoder.c  | 723 ++++++++++++++++++++-
 .../perf/util/intel-pt-decoder/intel-pt-decoder.h  |  20 +-
 tools/perf/util/intel-pt-decoder/intel-pt-log.h    |   5 +
 tools/perf/util/intel-pt.c                         | 224 ++++++-
 tools/perf/util/session.c                          |   6 +-
 14 files changed, 1169 insertions(+), 38 deletions(-)


Regards
Adrian