From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932337AbdIGR5x (ORCPT ); Thu, 7 Sep 2017 13:57:53 -0400 Received: from mga09.intel.com ([134.134.136.24]:19649 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755627AbdIGR4c (ORCPT ); Thu, 7 Sep 2017 13:56:32 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,359,1500966000"; d="scan'208";a="149347775" From: kan.liang@intel.com To: acme@kernel.org, peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org Cc: jolsa@kernel.org, namhyung@kernel.org, adrian.hunter@intel.com, lukasz.odzioba@intel.com, ak@linux.intel.com, Kan Liang Subject: [PATCH RFC 09/10] perf top: add option to set the number of thread for event synthesize Date: Thu, 7 Sep 2017 10:55:53 -0700 Message-Id: <1504806954-150842-10-git-send-email-kan.liang@intel.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1504806954-150842-1-git-send-email-kan.liang@intel.com> References: <1504806954-150842-1-git-send-email-kan.liang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang Using UINT_MAX to indicate the default thread#, which is the max number of online CPU. Signed-off-by: Kan Liang --- tools/perf/builtin-top.c | 5 ++++- tools/perf/util/event.c | 5 ++++- tools/perf/util/top.h | 1 + 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 4b8fdc1..5f59aa7 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -961,7 +961,7 @@ static int __cmd_top(struct perf_top *top) machine__synthesize_threads(&top->session->machines.host, &opts->target, top->evlist->threads, false, opts->proc_map_timeout, - (unsigned int)sysconf(_SC_NPROCESSORS_ONLN)); + top->nr_threads_synthesize); if (perf_hpp_list.socket) { ret = perf_env__read_cpu_topology_map(&perf_env); @@ -1114,6 +1114,7 @@ int cmd_top(int argc, const char **argv) }, .max_stack = sysctl_perf_event_max_stack, .sym_pcnt_filter = 5, + .nr_threads_synthesize = UINT_MAX, }; struct record_opts *opts = &top.record_opts; struct target *target = &opts->target; @@ -1223,6 +1224,8 @@ int cmd_top(int argc, const char **argv) OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, "Show entries in a hierarchy"), OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), + OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, + "number of thread to run event synthesize"), OPT_END() }; const char * const top_usage[] = { diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 4f565ff..2104603 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -777,7 +777,10 @@ int perf_event__synthesize_threads(struct perf_tool *tool, if (n < 0) return err; - thread_nr = nr_threads_synthesize; + if (nr_threads_synthesize == UINT_MAX) + thread_nr = sysconf(_SC_NPROCESSORS_ONLN); + else + thread_nr = nr_threads_synthesize; if (thread_nr <= 0) thread_nr = 1; if (thread_nr > n) diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index 9bdfb78..f4296e1 100644 --- a/tools/perf/util/top.h +++ b/tools/perf/util/top.h @@ -37,6 +37,7 @@ struct perf_top { int sym_pcnt_filter; const char *sym_filter; float min_percent; + unsigned int nr_threads_synthesize; }; #define CONSOLE_CLEAR "" -- 2.5.5