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| author |   Ian Rogers <irogers@google.com> | 2025-07-10 16:51:24 -0700 |
|---|---|---|
| committer |   Namhyung Kim <namhyung@kernel.org> | 2025-07-11 12:36:40 -0700 |
| commit | 6183afcba9c1c810656ddb36170106aaf3cf778c (patch) | |
| tree | 46956e7999b29cd82c16edc9acf7b3f8d3b40076 /tools/perf/scripts/python/flamegraph.py | |
| parent | perf python: Fix thread check in pyrf_evsel__read (diff) | |
| download | linux-rng-6183afcba9c1c810656ddb36170106aaf3cf778c.tar.xz linux-rng-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 <irogers@google.com>
Link: https://lore.kernel.org/r/20250710235126.1086011-12-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions