From patchwork Wed May 20 07:28:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 1294070 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=NTpXQ1A1; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49Rkrh0qFPz9sTC for ; Wed, 20 May 2020 17:28:52 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726729AbgETH2g (ORCPT ); Wed, 20 May 2020 03:28:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726692AbgETH2d (ORCPT ); Wed, 20 May 2020 03:28:33 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CA61C05BD43 for ; Wed, 20 May 2020 00:28:33 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id s8so1001767ybj.9 for ; Wed, 20 May 2020 00:28:33 -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=hc3Sqxo8+bYSfhkPwdNX6J1W1ArXV71CFGbpLRTMQCw=; b=NTpXQ1A1gRSNTOGXOyCVCR1iC6kgvKg1t9N4YfEFiCb8i9he3ttBH4afAEMxJMGy6G mlmUOS872RRcLQdPNxzno/qgDg+Efs5iHuxPb3r7dJSa3MN9uKrnHcIoCUA3NtAxTxKW RZLqNMqut76B5AcGYbivw9LVKXOryu5+qVZIrz7G+jlz0KkO7v82BXAhoCgSrfjOXstc XUyEXnXqeTGhAqyfv+UeBHlsB4p/LtuR2jXbtC/eVCMEQjUvRpWI15nxN1Ozn/um0HKR hBHWk374nGtUGTAadSIeaNqwcEgCWUWxRlun45AePAr1/+y1pDwwD0YMXODSuzihoyQG IR4A== 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=hc3Sqxo8+bYSfhkPwdNX6J1W1ArXV71CFGbpLRTMQCw=; b=n848t9dwwRfAyhJyG8oE2mcW+IxZ/yP+TCG6k05S6hnXIdx7pa8/TDo+RMaudf9nJO GJfv4toq7zLvvXwuUy8ApjkCmP3mS/kJtTEi21vU88gnYXVSgesGhJWHOYEdbm4GIo0i 4VUTW87WwFlhZg/ITsQ9fcR3pdy1iktDCwKfQMY0A3G5N7kzRhicKwY+kp69axKfWFMX XdqQd3ldfyt1LrcA21gGYdkWgEE6F1UWgY9EEKajzp3c4S0rPIh285nk1iFXONLbtv8s dmALSqt8SOSPTlbd4cmrsJM+buxZmXcy4CYBb67uBZyISeXsv1WO9rHJZxlI0W2QtiEi EVhA== X-Gm-Message-State: AOAM532eOjNSb9tWRv4JW4UTJOeNZOjIshQNw+mKrD3/ZkLVSfmduYHy En7yiMoMT/F5grcvqc1HoWC3fBhJhsdn X-Google-Smtp-Source: ABdhPJzLE4psPB63CGVjzraCJOkwP6TF56kP8X2CQlkCwaIxGK09+QyKGvqSiWEtY10gJEhX9W9USuE9Nw41 X-Received: by 2002:a25:be41:: with SMTP id d1mr5223988ybm.462.1589959712767; Wed, 20 May 2020 00:28:32 -0700 (PDT) Date: Wed, 20 May 2020 00:28:12 -0700 In-Reply-To: <20200520072814.128267-1-irogers@google.com> Message-Id: <20200520072814.128267-6-irogers@google.com> Mime-Version: 1.0 References: <20200520072814.128267-1-irogers@google.com> X-Mailer: git-send-email 2.26.2.761.g0e0b3e54be-goog Subject: [PATCH 5/7] 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 , Song Liu , Andrii Nakryiko , Kajol Jain , Andi Kleen , John Garry , Jin Yao , Kan Liang , Cong Wang , Kim Phillips , Paul Clarke , Srikar Dronamraju , linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, Vince Weaver , 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 | 91 ++++++++++++++++++++++++----------- 1 file changed, 62 insertions(+), 29 deletions(-) diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 52e4c3e4748a..7ed32baeb767 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -93,36 +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; + 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 (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; } @@ -130,18 +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); } @@ -157,7 +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); @@ -173,7 +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", @@ -200,6 +227,12 @@ 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;