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authorIan Rogers <irogers@google.com>2025-11-13 21:05:09 +0300
committerNamhyung Kim <namhyung@kernel.org>2025-11-18 05:43:08 +0300
commitbdf96c4ecd69523d97c98e47284caddde20b1df7 (patch)
tree07a02521e0bed6a71bbb56f78818ee03be53607c /include/linux/stackprotector.h
parentf69d34e8f23db8bca38c82a04ee9cd990777aaa2 (diff)
downloadlinux-bdf96c4ecd69523d97c98e47284caddde20b1df7.tar.xz
perf tool_pmu: Use old_count when computing count values for time events
When running in interval mode every third count of a time event isn't showing properly: ``` $ perf stat -e duration_time -a -I 1000 1.001082862 1,002,290,425 duration_time 2.004264262 1,003,183,516 duration_time 3.007381401 <not counted> duration_time 4.011160141 1,003,705,631 duration_time 5.014515385 1,003,290,110 duration_time 6.018539680 <not counted> duration_time 7.022065321 1,003,591,720 duration_time ``` The regression came in with a different fix, found through bisection, commit 68cb1567439f ("perf tool_pmu: Fix aggregation on duration_time"). The issue is caused by the enabled and running time of the event matching the old_count's and creating a delta of 0, which is indicative of an error. Fixes: 68cb1567439f ("perf tool_pmu: Fix aggregation on duration_time") Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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