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[176.243.199.7]) by smtp.googlemail.com with ESMTPSA id g29sm3451459edf.31.2021.08.20.03.54.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Aug 2021 03:54:32 -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 13/15] perf top: setup global workqueue Date: Fri, 20 Aug 2021 12:53:59 +0200 Message-Id: <331e87d881040594673af3399a8b925442fa46d2.1629454773.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-top 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-top.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index a3ae9176a83e2453..9b4f220920780a95 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -49,6 +49,7 @@ #include "util/term.h" #include "util/intlist.h" #include "util/parse-branch-options.h" +#include "util/workqueue/workqueue.h" #include "arch/common.h" #include "ui/ui.h" @@ -1767,8 +1768,23 @@ int cmd_top(int argc, const char **argv) opts->no_bpf_event = true; } + if (top.nr_threads_synthesize == UINT_MAX) + top.nr_threads_synthesize = sysconf(_SC_NPROCESSORS_ONLN); + if (top.nr_threads_synthesize > 1) { + status = setup_global_workqueue(top.nr_threads_synthesize); + if (status) { + create_workqueue_strerror(global_wq, errbuf, sizeof(errbuf)); + pr_err("setup_global_workqueue: %s\n", errbuf); + goto out_stop_sb_th; + } + } + status = __cmd_top(&top); + if (top.nr_threads_synthesize > 1) + teardown_global_workqueue(); + +out_stop_sb_th: if (!opts->no_bpf_event) evlist__stop_sb_thread(top.sb_evlist); -- 2.31.1