From patchwork Thu May 7 08:14:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 219715 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=-17.4 required=3.0 tests=DKIMWL_WL_MED, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable 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 11E0AC47257 for ; Thu, 7 May 2020 08:15:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E51A62083B for ; Thu, 7 May 2020 08:15:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="DnIDWylk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726742AbgEGIPH (ORCPT ); Thu, 7 May 2020 04:15:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727113AbgEGIPC (ORCPT ); Thu, 7 May 2020 04:15:02 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B4CFC0610D5 for ; Thu, 7 May 2020 01:15:02 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id o134so6050343yba.18 for ; Thu, 07 May 2020 01:15:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=x8VCoNbOxLZFLMlYxTaRHwkq1NLOLyg87hzu7d14hyY=; b=DnIDWylkv4QP0E/qzQWQUCOw7DqAcUr3dRnGPEmlynHVcgCTSSNtA34J5/WXyDy/aP ngFsSIAbn63mO9dCCMLqNc3lZvV1x6HE7yJHCH8kUOPz+osOzAkEMLoD85q/cvoCppbw WAkFdMs1zJurIznD2whL+nIGeLl4D3OjIh9edCTiXHsgxu1WKRpnKw7KWh8xRzsy/U9/ aZkK1eF48qBvbFmqvtFI9UkiW87sJD4lVGmj5AgzvrWz0P/0S2o60DvWmM5aw+hD0cCg PQTUYFUCFZRmmyYktlnTmLdcOxiks64/8k0cWu2D7wedXZNPmJqnnQN+zXCzl0eICorv D9pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=x8VCoNbOxLZFLMlYxTaRHwkq1NLOLyg87hzu7d14hyY=; b=RbEMGhpIK7BvTffqurg7OxZoNxhyA9pwlKqVQ8ruAtcHGlwECi5GIiqBemp1Gcoj1w sH7s3h2AQRLz4uBP7puh2FtZ4Ikp+YWeQ/0lFmitHSfPYP3u1IKmJNcuZHxMsadcOv39 6RKf0EGpuJZycTMEPGnnQDihq21fVP7tzVYdZ5Jpc1gzGPXiV2ynpApq5AknHpiORQyD D7mgu6rOSHbkjtTPAePT6CuJP7aMCLBMGSi5BKo/RU4IBwGzqw/u4LKO0zSLiSJ9mIHf fJRh0jO+XkIIaFoYZroLNZXuVHpXGZ3qGd2hGqWiQOQvG83hu5uc0pg93D9NmH9gh4Q3 PXmw== X-Gm-Message-State: AGi0PubdqiFJGah1rNoEnvtedC3GDcznlXO9SeT0yE8VrMLqQT8SUV/K eTSWtwxjXvxq8Vi5CLkjuO0RmtBy34M6 X-Google-Smtp-Source: APiQypL08ol3QAGdJ7KqVpm246M96AzQ5bgXecR762VCaNSOfpazYEMEu4altrjVLdXdV0ZaiO5/RSEmHw81 X-Received: by 2002:a25:8b02:: with SMTP id i2mr20129800ybl.283.1588839301174; Thu, 07 May 2020 01:15:01 -0700 (PDT) Date: Thu, 7 May 2020 01:14:36 -0700 In-Reply-To: <20200507081436.49071-1-irogers@google.com> Message-Id: <20200507081436.49071-8-irogers@google.com> Mime-Version: 1.0 References: <20200507081436.49071-1-irogers@google.com> X-Mailer: git-send-email 2.26.2.526.g744177e7f7-goog Subject: [RFC PATCH 7/7] perf metricgroup: remove duped metric group events From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , KP Singh , Kajol Jain , Andi Kleen , John Garry , Jin Yao , Kan Liang , Cong Wang , Kim Phillips , linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, Stephane Eranian , Ian Rogers Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A metric group contains multiple metrics. These metrics may use the same events. If metrics use separate events then it leads to more multiplexing and overall metric counts fail to sum to 100%. Modify how metrics are associated with events so that if the events in an earlier group satisfy the current metric, the same events are used. A record of used events is kept and at the end of processing unnecessary events are eliminated. Before: $ perf stat -a -M TopDownL1 sleep 1 Performance counter stats for 'system wide': 920,211,343 uops_issued.any # 0.5 Backend_Bound (16.56%) 1,977,733,128 idq_uops_not_delivered.core (16.56%) 51,668,510 int_misc.recovery_cycles (16.56%) 732,305,692 uops_retired.retire_slots (16.56%) 1,497,621,849 cycles (16.56%) 721,098,274 uops_issued.any # 0.1 Bad_Speculation (16.79%) 1,332,681,791 cycles (16.79%) 552,475,482 uops_retired.retire_slots (16.79%) 47,708,340 int_misc.recovery_cycles (16.79%) 1,383,713,292 cycles # 0.4 Frontend_Bound (16.76%) 2,013,757,701 idq_uops_not_delivered.core (16.76%) 1,373,363,790 cycles # 0.1 Retiring (33.54%) 577,302,589 uops_retired.retire_slots (33.54%) 392,766,987 inst_retired.any # 0.3 IPC (50.24%) 1,351,873,350 cpu_clk_unhalted.thread (50.24%) 1,332,510,318 cycles # 5330041272.0 SLOTS (49.90%) 1.006336145 seconds time elapsed After: $ perf stat -a -M TopDownL1 sleep 1 Performance counter stats for 'system wide': 765,949,145 uops_issued.any # 0.1 Bad_Speculation # 0.5 Backend_Bound (50.09%) 1,883,830,591 idq_uops_not_delivered.core # 0.3 Frontend_Bound (50.09%) 48,237,080 int_misc.recovery_cycles (50.09%) 581,798,385 uops_retired.retire_slots # 0.1 Retiring (50.09%) 1,361,628,527 cycles # 5446514108.0 SLOTS (50.09%) 391,415,714 inst_retired.any # 0.3 IPC (49.91%) 1,336,486,781 cpu_clk_unhalted.thread (49.91%) 1.005469298 seconds time elapsed Note: Bad_Speculation + Backend_Bound + Frontend_Bound + Retiring = 100% after, where as before it is 110%. After there are 2 groups, whereas before there are 6. After the cycles event appears once, before it appeared 5 times. Signed-off-by: Ian Rogers --- tools/perf/util/metricgroup.c | 97 ++++++++++++++++++++++------------- 1 file changed, 61 insertions(+), 36 deletions(-) diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 25e3e8df6b45..8bb2aeeb70ad 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -93,44 +93,72 @@ struct egroup { bool has_constraint; }; +/** + * Find a group of events in perf_evlist that correpond to those from a parsed + * metric expression. + * @perf_evlist: a list of events something like: {metric1 leader, metric1 + * sibling, metric1 sibling}:W,duration_time,{metric2 leader, metric2 sibling, + * metric2 sibling}:W,duration_time + * @pctx: the parse context for the metric expression. + * @has_constraint: is there a contraint on the group of events? In which case + * the events won't be grouped. + * @metric_events: out argument, null terminated array of evsel's associated + * with the metric. + * @evlist_used: in/out argument, bitmap tracking which evlist events are used. + * @return the first metric event or NULL on failure. + */ static struct evsel *find_evsel_group(struct evlist *perf_evlist, struct expr_parse_ctx *pctx, + bool has_constraint, struct evsel **metric_events, unsigned long *evlist_used) { - struct evsel *ev; - bool leader_found; - const size_t idnum = hashmap__size(&pctx->ids); - size_t i = 0; - int j = 0; - double *val_ptr; + struct evsel *ev, *current_leader = NULL; + double *val_ptr; + int i = 0, matched_events = 0, events_to_match; + const int idnum = (int)hashmap__size(&pctx->ids); + + /* duration_time is grouped separately. */ + if (!has_constraint && + hashmap__find(&pctx->ids, "duration_time", (void**)&val_ptr)) + events_to_match = idnum - 1; + else + events_to_match = idnum; evlist__for_each_entry (perf_evlist, ev) { - if (test_bit(j++, evlist_used)) + /* + * Events with a constraint aren't grouped and match the first + * events available. + */ + if (has_constraint && ev->weak_group) continue; - if (hashmap__find(&pctx->ids, ev->name, (void**)&val_ptr)) { - if (!metric_events[i]) - metric_events[i] = ev; - i++; - if (i == idnum) - break; - } else { - /* Discard the whole match and start again */ - i = 0; + if (!has_constraint && ev->leader != current_leader) { + /* + * Start of a new group, discard the whole match and + * start again. + */ + matched_events = 0; memset(metric_events, 0, sizeof(struct evsel *) * idnum); + current_leader = ev->leader; + } + if (hashmap__find(&pctx->ids, ev->name, (void**)&val_ptr)) + metric_events[matched_events++] = ev; + if (matched_events == events_to_match) + break; + } - if (hashmap__find(&pctx->ids, ev->name, (void**)&val_ptr)) { - if (!metric_events[i]) - metric_events[i] = ev; - i++; - if (i == idnum) - break; + if (events_to_match != idnum) { + /* Add the first duration_time. */ + evlist__for_each_entry (perf_evlist, ev) { + if (!strcmp(ev->name, "duration_time")) { + metric_events[matched_events++] = ev; + break; } } } - if (i != idnum) { + if (matched_events != idnum) { /* Not whole match */ return NULL; } @@ -138,18 +166,8 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist, metric_events[idnum] = NULL; for (i = 0; i < idnum; i++) { - leader_found = false; - evlist__for_each_entry(perf_evlist, ev) { - if (!leader_found && (ev == metric_events[i])) - leader_found = true; - - if (leader_found && - !strcmp(ev->name, metric_events[i]->name)) { - ev->metric_leader = metric_events[i]; - } - j++; - } ev = metric_events[i]; + ev->metric_leader = ev; set_bit(ev->idx, evlist_used); } @@ -165,7 +183,7 @@ static int metricgroup__setup_events(struct list_head *groups, int i = 0; int ret = 0; struct egroup *eg; - struct evsel *evsel; + struct evsel *evsel, *tmp; unsigned long *evlist_used; evlist_used = bitmap_alloc(perf_evlist->core.nr_entries); @@ -181,7 +199,8 @@ static int metricgroup__setup_events(struct list_head *groups, ret = -ENOMEM; break; } - evsel = find_evsel_group(perf_evlist, &eg->pctx, metric_events, + evsel = find_evsel_group(perf_evlist, &eg->pctx, + eg->has_constraint, metric_events, evlist_used); if (!evsel) { pr_debug("Cannot resolve %s: %s\n", @@ -211,6 +230,12 @@ static int metricgroup__setup_events(struct list_head *groups, list_add(&expr->nd, &me->head); } + evlist__for_each_entry_safe (perf_evlist, tmp, evsel) { + if (!test_bit(evsel->idx, evlist_used)) { + evlist__remove(perf_evlist, evsel); + evsel__delete(evsel); + } + } bitmap_free(evlist_used); return ret;