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[176.243.199.7]) by smtp.googlemail.com with ESMTPSA id g29sm3451459edf.31.2021.08.20.03.54.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Aug 2021 03:54:30 -0700 (PDT) From: Riccardo Mancini To: Arnaldo Carvalho de Melo Cc: Ian Rogers , Namhyung Kim , Peter Zijlstra , Ingo Molnar , Mark Rutland , Jiri Olsa , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Alexey Bayduraev , Riccardo Mancini Subject: [RFC PATCH v3 12/15] perf record: setup global workqueue Date: Fri, 20 Aug 2021 12:53:58 +0200 Message-Id: <3666b3e081d50de57d8669530eec59ed8be0c841.1629454773.git.rickyman7@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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