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| author | Ian Rogers <[email protected]> | 2025-07-10 23:51:24 +0000 |
|---|---|---|
| committer | Namhyung Kim <[email protected]> | 2025-07-11 19:36:40 +0000 |
| commit | 6183afcba9c1c810656ddb36170106aaf3cf778c (patch) | |
| tree | 46956e7999b29cd82c16edc9acf7b3f8d3b40076 /tools/perf/scripts/python/flamegraph.py | |
| parent | perf python: Fix thread check in pyrf_evsel__read (diff) | |
| download | kernel-6183afcba9c1c810656ddb36170106aaf3cf778c.tar.gz kernel-6183afcba9c1c810656ddb36170106aaf3cf778c.zip | |
perf python: Correct pyrf_evsel__read for tool PMUs
Tool PMUs assume that stat's process_counter_values is being used to
read the counters. Specifically they hold onto old values in
evsel->prev_raw_counts and give the cumulative count based off of this
value. Update pyrf_evsel__read to allocate counts and prev_raw_counts,
use evsel__read_counter rather than perf_evsel__read so tool PMUs are
read from not just perf_event_open events, make the returned
pyrf_counts_values contain the delta value rather than the cumulative
value.
Fixes: 739621f65702 ("perf python: Add evsel read method")
Signed-off-by: Ian Rogers <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions