Messages in this thread | | | From | Adrian Hunter <> | Subject | [PATCH 00/12] perf intel-pt: Add more support for VMs | Date | Thu, 29 Apr 2021 15:58:42 +0300 |
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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
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