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From devnull@lkml.org Fri Apr 26 19:24:30 2024 >From mailfetcher Tue Oct 3 14:56:48 2017 Envelope-to: lkml@grols.ch Delivery-date: Tue, 03 Oct 2017 14:56:47 +0200 Received: from srv.grols.ch [5.172.41.101] by 74f7beb50cb2 with IMAP (fetchmail-6.3.26) for (single-drop); Tue, 03 Oct 2017 14:56:48 +0200 (CEST) Received: from vger.kernel.org ([209.132.180.67]) by home.grols.ch with esmtp (Exim 4.89) (envelope-from ) id 1dzMkh-0000OQ-C7 for lkml@grols.ch; Tue, 03 Oct 2017 14:56:47 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753433AbdJCM4b (ORCPT ); Tue, 3 Oct 2017 08:56:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:55202 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753963AbdJCM4X (ORCPT ); Tue, 3 Oct 2017 08:56:23 -0400 Received: from jouet.infradead.org (unknown [181.213.46.212]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 417A2218BD; Tue, 3 Oct DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 417A2218BD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=acme@kernel.org From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Kan Liang , Adrian Hunter , Alexei Starovoitov , Andi Kleen , He Kuang X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171003125540.331-1-acme@kernel.org> References: <20171003125540.331-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-Id: X-Mailing-List: linux-kernel@vger.kernel.org Received-SPF: none client-ip=209.132.180.67; envelope-from=linux-kernel-owner@vger.kernel.org; helo=vger.kernel.org X-Spam-Score: 5.7 X-Spam-Score-Bar: +++++ X-Spam-Action: greylist X-Spam-Report: Action: greylist Symbol: R_SPF_NA(0.00) Symbol: RCPT_COUNT_TWELVE(0.00) Symbol: MAILLIST(-0.20) Symbol: FROM_HAS_DN(0.00) Symbol: ASN(0.00) Symbol: MIME_GOOD(-0.10) Symbol: TO_DN_SOME(0.00) Symbol: RCVD_COUNT_THREE(0.00) Symbol: BAYES_SPAM(4.00) Symbol: From: Kan Liang Using UINT_MAX to indicate the default thread#, which is the max number of online CPU. Committer testing: # perf trace --no-inherit -e clone -o /tmp/output perf top --num-thread-synthesize 9 # cat /tmp/output ? ( ? ): ... [continued]: clone()) = 26651 (perf) 0.059 ( 0.010 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5bfac44f30, parent_tidptr: 0x7f5bfac459d0, child_tidptr: 0x7f5bfac459d0, tls: 0x7f5bfac45700) = 26652 (perf) 0.116 ( 0.014 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5bfa443f30, parent_tidptr: 0x7f5bfa4449d0, child_tidptr: 0x7f5bfa4449d0, tls: 0x7f5bfa444700) = 26653 (perf) 0.141 ( 0.009 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5bf9c42f30, parent_tidptr: 0x7f5bf9c439d0, child_tidptr: 0x7f5bf9c439d0, tls: 0x7f5bf9c43700) = 26654 (perf) 0.160 ( 0.012 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5bf9441f30, parent_tidptr: 0x7f5bf94429d0, child_tidptr: 0x7f5bf94429d0, tls: 0x7f5bf9442700) = 26655 (perf) 0.232 ( 0.013 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5bf8c40f30, parent_tidptr: 0x7f5bf8c419d0, child_tidptr: 0x7f5bf8c419d0, tls: 0x7f5bf8c41700) = 26656 (perf) 0.393 ( 0.011 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5be3ffef30, parent_tidptr: 0x7f5be3fff9d0, child_tidptr: 0x7f5be3fff9d0, tls: 0x7f5be3fff700) = 26657 (perf) 0.802 ( 0.012 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5be37fdf30, parent_tidptr: 0x7f5be37fe9d0, child_tidptr: 0x7f5be37fe9d0, tls: 0x7f5be37fe700) = 26658 (perf) 1.411 ( 0.022 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5be2ffcf30, parent_tidptr: 0x7f5be2ffd9d0, child_tidptr: 0x7f5be2ffd9d0, tls: 0x7f5be2ffd700) = 26659 (perf) 246.422 ( 0.042 ms): clone(flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, child_stack: 0x7f5be2ffcf30, parent_tidptr: 0x7f5be2ffd9d0, child_tidptr: 0x7f5be2ffd9d0, tls: 0x7f5be2ffd700) = 26660 (perf) # Signed-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexei Starovoitov Cc: Andi Kleen Cc: He Kuang Cc: Lukasz Odzioba Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/r/1506696477-146932-5-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-top.txt | 3 +++ tools/perf/builtin-top.c | 11 ++++++++--- tools/perf/util/event.c | 5 ++++- tools/perf/util/top.h | 1 + 4 files changed, 16 insertions(+), 4 deletions(-) diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index d864ea6fd367..4353262bc462 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -240,6 +240,9 @@ Default is to monitor all CPUS. --force:: Don't do ownership validation. +--num-thread-synthesize:: + The number of threads to run when synthesizing events for existing processes. + By default, the number of threads equals to the number of online CPUs. INTERACTIVE PROMPTING KEYS -------------------------- diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index bc31b93cc1d8..477a8699f0b5 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -958,14 +958,16 @@ static int __cmd_top(struct perf_top *top) if (perf_session__register_idle_thread(top->session) < 0) goto out_delete; - perf_set_multithreaded(); + if (top->nr_threads_synthesize > 1) + perf_set_multithreaded(); 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); - perf_set_singlethreaded(); + if (top->nr_threads_synthesize > 1) + perf_set_singlethreaded(); if (perf_hpp_list.socket) { ret = perf_env__read_cpu_topology_map(&perf_env); @@ -1118,6 +1120,7 @@ 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; @@ -1227,6 +1230,8 @@ 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 0e678dd6bdbe..47eff4767edb 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -790,7 +790,10 @@ 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 <= 1) { err = __perf_event__synthesize_threads(tool, process, diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index 9bdfb78a9a35..f4296e1e3bb8 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 "" -- 2.13.6