kernel/tools/perf/tests/shell/stat+event_uniquifying.sh, branch linux-rolling-stable

perf test: Avoid uncore_imc/clockticks in uniquification test

2025-10-19T14:37:05Z

[ Upstream commit edaeb4bcf1511fe4e464fff9dd4a3abf6b0096da ] The detection of uncore_imc may happen for free running PMUs and the clockticks event may be present on uncore_clock. Rewrite the test to detect duplicated/deduplicated events from perf list, not hardcoded to uncore_imc. If perf stat fails then assume it is permissions and skip the test. Committer testing: Before: root@x1:~# perf test -vv uniquifyi 96: perf stat events uniquifying: --- start --- test child forked, pid 220851 stat event uniquifying test grep: Unmatched [, [^, [:, [., or [= Event is not uniquified [Failed] perf stat -e clockticks -A -o /tmp/__perf_test.stat_output.X7ChD -- true # started on Fri Sep 19 16:48:38 2025 Performance counter stats for 'system wide': CPU0 2,310,956 uncore_clock/clockticks/ 0.001746771 seconds time elapsed ---- end(-1) ---- 96: perf stat events uniquifying : FAILED! root@x1:~# After: root@x1:~# perf test -vv uniquifyi 96: perf stat events uniquifying: --- start --- test child forked, pid 222366 Uniquification of PMU sysfs events test Testing event uncore_imc_free_running/data_read/ is uniquified to uncore_imc_free_running_0/data_read/ Testing event uncore_imc_free_running/data_total/ is uniquified to uncore_imc_free_running_0/data_total/ Testing event uncore_imc_free_running/data_write/ is uniquified to uncore_imc_free_running_0/data_write/ Testing event uncore_imc_free_running/data_read/ is uniquified to uncore_imc_free_running_1/data_read/ Testing event uncore_imc_free_running/data_total/ is uniquified to uncore_imc_free_running_1/data_total/ Testing event uncore_imc_free_running/data_write/ is uniquified to uncore_imc_free_running_1/data_write/ ---- end(0) ---- 96: perf stat events uniquifying : Ok root@x1:~# Fixes: 070b315333ee942f ("perf test: Restrict uniquifying test to machines with 'uncore_imc'") Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chun-Tse Shao Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin

perf test: Restrict uniquifying test to machines with 'uncore_imc'

2025-06-16T17:05:10Z

The test would fail if target machine does not have 'uncore_imc' devices. Since event uniquifying behavior is similar among different architectures, we are restricting the test to only run on machines with `uncore_imc` devices. Suggested-by: Ian Rogers Signed-off-by: Chun-Tse Shao Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20250521224513.1104129-1-ctshao@google.com [ Skip the test, i.e. return 2, instead of returning 0 as if the test had succeed ] Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add stat uniquifying test

2025-05-14T12:51:04Z

The `stat+uniquify.sh` test retrieves all uniquified `clockticks` events from `perf list -v clockticks` and check if `perf stat -e clockticks -A` contains all of them. Committer testing: root@x1:~# grep -m1 "model name" /proc/cpuinfo model name : 13th Gen Intel(R) Core(TM) i7-1365U root@x1:~# perf list clockticks List of pre-defined events (to be used in -e or -M): uncore_clock/clockticks/ [Kernel PMU event] uncore memory: unc_m_clockticks [Number of clocks. Unit: uncore_imc] root@x1:~# root@x1:~# perf test uniquifying 92: perf stat events uniquifying : Ok root@x1:~# perf test -vv uniquifying 92: perf stat events uniquifying: --- start --- test child forked, pid 1552628 stat event uniquifying test ---- end(0) ---- 92: perf stat events uniquifying : Ok root@x1:~# Signed-off-by: Chun-Tse Shao Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Dr. David Alan Gilbert Cc: Howard Chu Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Levi Yun Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Weilin Wang Link: https://lore.kernel.org/r/20250513215401.2315949-4-ctshao@google.com Signed-off-by: Arnaldo Carvalho de Melo