From 5e895278697c014e95ae7ae5e79a72ef68c5184e Mon Sep 17 00:00:00 2001 From: Yang Jihong Date: Tue, 6 Feb 2024 08:32:26 +0000 Subject: [PATCH] perf sched: Move curr_thread initialization to perf_sched__map() The curr_thread is used only for the 'perf sched map'. Put initialization in perf_sched__map() to reduce unnecessary actions in other commands. Simple functional testing: # perf sched record perf bench sched messaging # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run Total time: 0.197 [sec] [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 15.526 MB perf.data (140095 samples) ] # perf sched map *A0 451264.532445 secs A0 => migration/0:15 *. 451264.532468 secs . => swapper:0 . *B0 451264.532537 secs B0 => migration/1:21 . *. 451264.532560 secs . . *C0 451264.532644 secs C0 => migration/2:27 . . *. 451264.532668 secs . . . *D0 451264.532753 secs D0 => migration/3:33 . . . *. 451264.532778 secs . . . . *E0 451264.532861 secs E0 => migration/4:39 . . . . *. 451264.532886 secs . . . . . *F0 451264.532973 secs F0 => migration/5:45 A7 A7 A7 A7 A7 *A7 . . . . . . . . . . 451264.790785 secs A7 A7 A7 A7 A7 A7 *A7 . . . . . . . . . 451264.790858 secs A7 A7 A7 A7 A7 A7 A7 *A7 . . . . . . . . 451264.790934 secs A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . . . . . . 451264.791004 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . . . . . 451264.791075 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . . . . 451264.791143 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . . . 451264.791232 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . . 451264.791336 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . . 451264.791407 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 . 451264.791484 secs A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 A7 *A7 451264.791553 secs # echo $? 0 Signed-off-by: Yang Jihong Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20240206083228.172607-4-yangjihong1@huawei.com --- tools/perf/builtin-sched.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 1513e87ce4f2..b56a573ed06c 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -3266,9 +3266,13 @@ static int perf_sched__map(struct perf_sched *sched) { int rc = -1; - if (setup_map_cpus(sched)) + sched->curr_thread = calloc(MAX_CPUS, sizeof(*(sched->curr_thread))); + if (!sched->curr_thread) return rc; + if (setup_map_cpus(sched)) + goto out_free_curr_thread; + if (setup_color_pids(sched)) goto out_put_map_cpus; @@ -3291,6 +3295,9 @@ out_put_color_pids: out_put_map_cpus: zfree(&sched->map.comp_cpus); perf_cpu_map__put(sched->map.cpus); + +out_free_curr_thread: + zfree(&sched->curr_thread); return rc; } @@ -3576,11 +3583,6 @@ int cmd_sched(int argc, const char **argv) unsigned int i; int ret = 0; - sched.curr_thread = calloc(MAX_CPUS, sizeof(*sched.curr_thread)); - if (!sched.curr_thread) { - ret = -ENOMEM; - goto out; - } sched.cpu_last_switched = calloc(MAX_CPUS, sizeof(*sched.cpu_last_switched)); if (!sched.cpu_last_switched) { ret = -ENOMEM; @@ -3662,7 +3664,6 @@ int cmd_sched(int argc, const char **argv) out: free(sched.curr_pid); free(sched.cpu_last_switched); - free(sched.curr_thread); return ret; }