[RFC PATCH v3 12/15] perf record: setup global workqueue
From: Riccardo Mancini <hidden>
Date: 2021-08-20 10:55:06
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
This patch initializes the global workqueue in perf-record if nr_threads_synthesize is set. This patch is a preparation for using the global_workqueue in synthesize. Signed-off-by: Riccardo Mancini <redacted> --- tools/perf/builtin-record.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 548c1dbde6c52ed6..4d7b610b1d0bb9af 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c@@ -49,6 +49,7 @@ #include "util/clockid.h" #include "util/pmu-hybrid.h" #include "util/evlist-hybrid.h" +#include "util/workqueue/workqueue.h" #include "asm/bug.h" #include "perf.h"
@@ -2894,7 +2895,21 @@ int cmd_record(int argc, const char **argv) rec->opts.comp_level = comp_level_max; pr_debug("comp level: %d\n", rec->opts.comp_level); + if (rec->opts.nr_threads_synthesize == UINT_MAX) + rec->opts.nr_threads_synthesize = sysconf(_SC_NPROCESSORS_ONLN); + if (rec->opts.nr_threads_synthesize > 1) { + err = setup_global_workqueue(rec->opts.nr_threads_synthesize); + if (err) { + create_workqueue_strerror(global_wq, errbuf, sizeof(errbuf)); + pr_err("setup_global_workqueue: %s\n", errbuf); + goto out; + } + } + err = __cmd_record(&record, argc, argv); + + if (rec->opts.nr_threads_synthesize > 1) + teardown_global_workqueue(); out: bitmap_free(rec->affinity_mask.bits); evlist__delete(rec->evlist);
--
2.31.1