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Yang Jihong authored
when only show idle events, runtime stats of non-idle tasks is not updated, and the value is 0, there is no need to print non-idle samples. Before: # perf sched timehist -I Samples of sched_switch event do not have callchains. time cpu task name wait time sch delay run time [tid/pid] (msec) (msec) (msec) --------------- ------ ------------------------------ --------- --------- --------- 2090450.763235 [0000] migration/0[15] 0.000 0.000 0.000 2090450.763268 [0001] migration/1[21] 0.000 0.000 0.000 2090450.763309 [0002] migration/2[27] 0.000 0.000 0.000 2090450.763343 [0003] migration/3[33] 0.000 0.000 0.000 2090450.763469 [0004] migration/4[39] 0.000 0.000 0.000 2090450.763501 [0005] migration/5[45] 0.000 0.000 0.000 2090450.763622 [0006] migration/6[51] 0.000 0.000 0.000 2090450.763660 [0007] migration/7[57] 0.000 0.000 0.000 2090450.763741 [0009] migration/9[69] 0.000 0.000 0.000 2090450.763862 [0010] migration/10[75] 0.000 0.000 0.000 2090450.763894 [0011] migration/11[81] 0.000 0.000 0.000 2090450.764021 [0012] migration/12[87] 0.000 0.000 0.000 2090450.764056 [0013] migration/13[93] 0.000 0.000 0.000 2090450.764135 [0014] migration/14[99] 0.000 0.000 0.000 2090450.764163 [0015] migration/15[105] 0.000 0.000 0.000 2090450.764292 [0016] migration/16[111] 0.000 0.000 0.000 2090450.764371 [0017] migration/17[117] 0.000 0.000 0.000 2090450.764422 [0018] migration/18[123] 0.000 0.000 0.000 2090450.764490 [0000] <idle> 0.000 0.000 1.255 2090450.764505 [0000] s1-perf[8235/7168] 0.000 0.000 0.000 2090450.764571 [0016] <idle> 0.000 0.000 0.278 2090450.764588 [0010] <idle> 0.000 0.000 0.725 2090450.764590 [0016] s1-agent[7179/7162] 0.000 0.000 0.000 2090450.764635 [0000] <idle> 0.015 0.015 0.129 2090450.764637 [0017] <idle> 0.000 0.000 0.266 2090450.764639 [0000] s1-perf[8235/7168] 0.000 0.000 0.000 2090450.764668 [0017] s1-agent[7180/7162] 0.000 0.000 0.000 2090450.764669 [0000] <idle> 0.003 0.003 0.029 2090450.764672 [0000] s1-perf[8235/7168] 0.000 0.000 0.000 2090450.764683 [0000] <idle> 0.003 0.003 0.010 After: # perf sched timehist -I Samples of sched_switch event do not have callchains. time cpu task name wait time sch delay run time [tid/pid] (msec) (msec) (msec) --------------- ------ ------------------------------ --------- --------- --------- 2090450.764490 [0000] <idle> 0.000 0.000 1.255 2090450.764571 [0016] <idle> 0.000 0.000 0.278 2090450.764588 [0010] <idle> 0.000 0.000 0.725 2090450.764635 [0000] <idle> 0.015 0.015 0.129 2090450.764637 [0017] <idle> 0.000 0.000 0.266 2090450.764669 [0000] <idle> 0.003 0.003 0.029 2090450.764683 [0000] <idle> 0.003 0.003 0.010 2090450.764688 [0016] <idle> 0.019 0.019 0.097 2090450.764694 [0000] <idle> 0.001 0.001 0.009 2090450.764706 [0000] <idle> 0.001 0.001 0.010 2090450.764725 [0002] <idle> 0.000 0.000 1.415 2090450.764728 [0000] <idle> 0.002 0.002 0.019 2090450.764823 [0000] <idle> 0.003 0.003 0.091 2090450.764838 [0019] <idle> 0.000 0.000 0.154 2090450.764865 [0002] <idle> 0.109 0.109 0.029 2090450.764866 [0000] <idle> 0.012 0.012 0.030 2090450.764880 [0002] <idle> 0.013 0.013 0.001 2090450.764880 [0000] <idle> 0.002 0.002 0.011 2090450.764896 [0000] <idle> 0.001 0.001 0.013 2090450.764903 [0019] <idle> 0.063 0.063 0.002 2090450.764908 [0019] <idle> 0.003 0.003 0.001 Fixes: 07235f84 ("perf sched timehist: Add -I/--idle-hist option") Signed-off-by:Yang Jihong <yangjihong@bytedance.com> Acked-by:
Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20240812132606.3126490-1-yangjihong@bytedance.comReviewed-and-tested-by:
Madadi Vineeth Reddy <vineethr@linux.ibm.com> Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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