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| author | Adrian Hunter <[email protected]> | 2022-05-09 18:23:58 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2022-05-17 11:55:49 -0300 |
| commit | d7015e50a9ed180dcc3947635bb2b5711c37f48b (patch) | |
| tree | f16c317f303979c5b3b6c91f6026083d31e5c18d /tools/perf/scripts/python/intel-pt-events.py | |
| parent | df36d2572e0515dc190459489c159b78bb3a21fc (diff) | |
perf intel-pt: Add support for emulated ptwrite
ptwrite is an Intel x86 instruction that writes arbitrary values into an
Intel PT trace. It is not supported on all hardware, so provide an
alternative that makes use of TNT packets to convey the payload data.
TNT packets encode Taken/Not-taken conditional branch information, so
taking branches based on the payload value will encode the value into
the TNT packet. Refer to the changes to the documentation file
perf-intel-pt.txt in this patch for an example.
Signed-off-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/intel-pt-events.py')
0 files changed, 0 insertions, 0 deletions