From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE234C43382 for ; Fri, 28 Sep 2018 06:40:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74B972172C for ; Fri, 28 Sep 2018 06:40:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74B972172C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728867AbeI1NCM (ORCPT ); Fri, 28 Sep 2018 09:02:12 -0400 Received: from mga02.intel.com ([134.134.136.20]:40240 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726060AbeI1NCL (ORCPT ); Fri, 28 Sep 2018 09:02:11 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Sep 2018 23:39:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,313,1534834800"; d="scan'208";a="74562483" Received: from linux.intel.com ([10.54.29.200]) by fmsmga008.fm.intel.com with ESMTP; 27 Sep 2018 23:39:26 -0700 Received: from [10.125.252.13] (abudanko-mobl.ccr.corp.intel.com [10.125.252.13]) by linux.intel.com (Postfix) with ESMTP id 6BC70580144; Thu, 27 Sep 2018 23:39:24 -0700 (PDT) From: Alexey Budankov Organization: Intel Corp. Subject: [PATCH v2] perf record: encode -k clockid frequency into Perf trace To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo Cc: Alexander Shishkin , Jiri Olsa , Namhyung Kim , Andi Kleen , linux-kernel Message-ID: <16a10c62-e929-fc1b-de09-1d36b8d7396e@linux.intel.com> Date: Fri, 28 Sep 2018 09:39:23 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Store -k clockid frequency into Perf trace to enable timestamps derived metrics conversion into wall clock time on reporting stage. Below is the example of perf report output: tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc ... [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ] tools/perf/perf report --header # ======== ... # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4 ... # clockid frequency: 1000 MHz ... # ======== Signed-off-by: Alexey Budankov --- Changes in v2: - renamed clockid_freq to clockid_res_ns and get_clockid_freq() to get_clockid_res() - avoided redundant define of NSEC_IN_SEC, reused linux/time64.h:NSEC_PER_SEC - moved MHz conversion into print_clockid() and shortened write_clockid() --- tools/perf/builtin-record.c | 21 +++++++++++++++++++-- tools/perf/perf.h | 1 + tools/perf/util/env.h | 1 + tools/perf/util/header.c | 27 +++++++++++++++++++++++++++ tools/perf/util/header.h | 1 + 5 files changed, 49 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 0980dfe3396b..127dc7432394 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -592,6 +592,11 @@ static void record__init_features(struct record *rec) if (!rec->opts.full_auxtrace) perf_header__clear_feat(&session->header, HEADER_AUXTRACE); + if (rec->opts.use_clockid && rec->opts.clockid_res_ns) + session->header.env.clockid_res_ns = rec->opts.clockid_res_ns; + else + perf_header__clear_feat(&session->header, HEADER_CLOCKID); + perf_header__clear_feat(&session->header, HEADER_STAT); } @@ -1337,6 +1342,17 @@ static const struct clockid_map clockids[] = { CLOCKID_END, }; +static int get_clockid_res(clockid_t clk_id, size_t *res_ns) +{ + struct timespec res; + + *res_ns = 0; + if (!clock_getres(clk_id, &res)) + *res_ns = res.tv_nsec + res.tv_sec * NSEC_PER_SEC; + + return 0; +} + static int parse_clockid(const struct option *opt, const char *str, int unset) { struct record_opts *opts = (struct record_opts *)opt->value; @@ -1360,7 +1376,7 @@ static int parse_clockid(const struct option *opt, const char *str, int unset) /* if its a number, we're done */ if (sscanf(str, "%d", &opts->clockid) == 1) - return 0; + return get_clockid_res(opts->clockid, &opts->clockid_res_ns); /* allow a "CLOCK_" prefix to the name */ if (!strncasecmp(str, "CLOCK_", 6)) @@ -1369,7 +1385,8 @@ static int parse_clockid(const struct option *opt, const char *str, int unset) for (cm = clockids; cm->name; cm++) { if (!strcasecmp(str, cm->name)) { opts->clockid = cm->clockid; - return 0; + return get_clockid_res(opts->clockid, + &opts->clockid_res_ns); } } diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 21bf7f5a3cf5..981db3c2ed60 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -81,6 +81,7 @@ struct record_opts { unsigned initial_delay; bool use_clockid; clockid_t clockid; + size_t clockid_res_ns; unsigned int proc_map_timeout; }; diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h index 1f3ccc368530..b167a54d635f 100644 --- a/tools/perf/util/env.h +++ b/tools/perf/util/env.h @@ -63,6 +63,7 @@ struct perf_env { struct numa_node *numa_nodes; struct memory_node *memory_nodes; unsigned long long memory_bsize; + size_t clockid_res_ns; }; extern struct perf_env perf_env; diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 1ec1d9bc2d63..4ce5339158f7 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1034,6 +1034,13 @@ static int write_auxtrace(struct feat_fd *ff, return err; } +static int write_clockid(struct feat_fd *ff, + struct perf_evlist *evlist __maybe_unused) +{ + return do_write(ff, &ff->ph->env.clockid_res_ns, + sizeof(ff->ph->env.clockid_res_ns)); +} + static int cpu_cache_level__sort(const void *a, const void *b) { struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a; @@ -1508,6 +1515,12 @@ static void print_cpu_topology(struct feat_fd *ff, FILE *fp) fprintf(fp, "# Core ID and Socket ID information is not available\n"); } +static void print_clockid(struct feat_fd *ff, FILE *fp) +{ + fprintf(fp, "# clockid frequency: %ld MHz\n", + ff->ph->env.clockid_res_ns * 1000); +} + static void free_event_desc(struct perf_evsel *events) { struct perf_evsel *evsel; @@ -2531,6 +2544,19 @@ static int process_mem_topology(struct feat_fd *ff, return ret; } +static int process_clockid(struct feat_fd *ff, + void *data __maybe_unused) +{ + size_t clockid_res_ns; + + if (do_read_u64(ff, &clockid_res_ns)) + return -1; + + ff->ph->env.clockid_res_ns = clockid_res_ns; + + return 0; +} + struct feature_ops { int (*write)(struct feat_fd *ff, struct perf_evlist *evlist); void (*print)(struct feat_fd *ff, FILE *fp); @@ -2590,6 +2616,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { FEAT_OPN(CACHE, cache, true), FEAT_OPR(SAMPLE_TIME, sample_time, false), FEAT_OPR(MEM_TOPOLOGY, mem_topology, true), + FEAT_OPR(CLOCKID, clockid, false) }; struct header_print_data { diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index e17903caa71d..0d553ddca0a3 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -38,6 +38,7 @@ enum { HEADER_CACHE, HEADER_SAMPLE_TIME, HEADER_MEM_TOPOLOGY, + HEADER_CLOCKID, HEADER_LAST_FEATURE, HEADER_FEAT_BITS = 256, };