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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C007AC433FE for ; Sat, 13 Nov 2021 07:16:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A27C46112E for ; Sat, 13 Nov 2021 07:16:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235733AbhKMHTP (ORCPT ); Sat, 13 Nov 2021 02:19:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235579AbhKMHSs (ORCPT ); Sat, 13 Nov 2021 02:18:48 -0500 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 3F8BFC061767 for ; Fri, 12 Nov 2021 23:15:56 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id d9-20020a251d09000000b005c208092922so18386686ybd.20 for ; Fri, 12 Nov 2021 23:15:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=9oeCdIbb0ChQ0ccTxxKgUNT90EB+1NVnPZJWSCLoDCg=; b=Q4nPPeDQEwBQzlLPs6cvF0Pq7yWZfNs9NM4+SUndkl++DYth+Z6CB9MpWDIU65nbHG He3+VG20vEcvYhk3GM0ql64FoJopt1Ww1w22Gs0SVH3nEVvh95T95p8Omj/zCXs/9AdE xfUkP54Jz2BSYs9JO9TBRCmsWsZvB/uQ3H4wfNguAfjPBEe4PfBf6VLoAu3BdzbXUCpI X5NsnE1N8QYJ5fKCKj1/rcWu6Gf3O7mpjgXrjDKretWmNG0saksRJ2HqkRo7XjP5aSP3 G8r+65B9jpwkgHMvcdbkgPXJ9KmSsi3upeBThHVZP2g2K5R3snoCo0ldbgkjMzw0y9sN r0LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=9oeCdIbb0ChQ0ccTxxKgUNT90EB+1NVnPZJWSCLoDCg=; b=oONYG7VlZhyGkhjAz+y9/T5qWW5/qhhTPjejoni3eadGS1eaFsvIpUjKszroqM7mtI vNhL0gY/tPh3q4zaqyFoZjfrF7UJPe6vbN/L6/vhJSzbDgxlzhpHeqcfogUf0KudKxXv 1d32XNb9nEBy2onhoIYr9o4/lkHjUXl/2QXymnQ434UBgnxEHYf4niyXWmbxrZow/dV+ fmK/Dz29TG87/2kPLSrkzvYZvfXz/pfeG56fuHnBNnPurRWFXWLT69E/fW/s332lUlE8 hirUGjtObL3iaWh9oQdtAGnXADEaXZX+6+sSJz7vzhSFkCWnM7p97KXNUBoZBkU8z2bt aWXQ== X-Gm-Message-State: AOAM532NiOkHlPiLHQVsaoV5zMI4eYp6mXD1A5vBadSfKF7VpBgUk394 zHJ7gkCoa9ZhWdoHyP7EidWpJwkLEaqy X-Google-Smtp-Source: ABdhPJxH/qqHn0qagbpbT52hxeFtOfwO/JTXSSEhEUdCc62dL0DZzLdc/R3Rl0f+WTkLsLb0ouSZShRVWgXF X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:7363:ca3f:1032:5f2d]) (user=irogers job=sendgmr) by 2002:a25:2493:: with SMTP id k141mr22438807ybk.387.1636787755420; Fri, 12 Nov 2021 23:15:55 -0800 (PST) Date: Fri, 12 Nov 2021 23:15:48 -0800 In-Reply-To: <20211113071548.372572-1-irogers@google.com> Message-Id: <20211113071548.372572-2-irogers@google.com> Mime-Version: 1.0 References: <20211113071548.372572-1-irogers@google.com> X-Mailer: git-send-email 2.34.0.rc1.387.gb447b232ab-goog Subject: [PATCH 2/2] perf parse-events: Architecture specific leader override From: Ian Rogers To: Andi Kleen , Jiri Olsa , Namhyung Kim , John Garry , Kajol Jain , "Paul A . Clarke" , Arnaldo Carvalho de Melo , Riccardo Mancini , Kan Liang , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: eranian@google.com, Ian Rogers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently topdown events must appear after a slots event: $ perf stat -e '{slots,topdown-fe-bound}' /bin/true Performance counter stats for '/bin/true': 3,183,090 slots 986,133 topdown-fe-bound Reversing the events yields: $ perf stat -e '{topdown-fe-bound,slots}' /bin/true Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (topdown-fe-bound). For metrics the order of events is determined by iterating over a hashmap, and so slots isn't guaranteed to be first which can yield this error. Change the set_leader in parse-events, called when a group is closed, so that rather than always making the first event the leader, if the slots event exists then it is made the leader. It is then moved to the head of the evlist otherwise it won't be opened in the correct order. The result is: $ perf stat -e '{topdown-fe-bound,slots}' /bin/true Performance counter stats for '/bin/true': 3,274,795 slots 1,001,702 topdown-fe-bound A problem with this approach is the slots event is identified by name, names can be overwritten like 'cpu/slots,name=foo/' and this causes the leader change to fail. Signed-off-by: Ian Rogers --- tools/perf/arch/x86/util/evlist.c | 17 +++++++++++++++++ tools/perf/util/evlist.h | 1 + tools/perf/util/parse-events.c | 16 +++++++++++----- tools/perf/util/parse-events.h | 4 ++-- tools/perf/util/parse-events.y | 12 ++++++++---- 5 files changed, 39 insertions(+), 11 deletions(-) diff --git a/tools/perf/arch/x86/util/evlist.c b/tools/perf/arch/x86/util/evlist.c index 0b0951030a2f..1624372b2da2 100644 --- a/tools/perf/arch/x86/util/evlist.c +++ b/tools/perf/arch/x86/util/evlist.c @@ -17,3 +17,20 @@ int arch_evlist__add_default_attrs(struct evlist *evlist) else return parse_events(evlist, TOPDOWN_L1_EVENTS, NULL); } + +struct evsel *arch_evlist__leader(struct list_head *list) +{ + struct evsel *evsel, *first; + + first = list_entry(list->next, struct evsel, core.node); + + if (!pmu_have_event("cpu", "slots")) + return first; + + __evlist__for_each_entry(list, evsel) { + if (evsel->pmu_name && !strcmp(evsel->pmu_name, "cpu") && + evsel->name && strstr(evsel->name, "slots")) + return evsel; + } + return first; +} diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 97bfb8d0be4f..993437ffe429 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -110,6 +110,7 @@ int __evlist__add_default_attrs(struct evlist *evlist, __evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) int arch_evlist__add_default_attrs(struct evlist *evlist); +struct evsel *arch_evlist__leader(struct list_head *list); int evlist__add_dummy(struct evlist *evlist); diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 6308ba739d19..a2f4c086986f 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1821,22 +1821,28 @@ parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list, return ret; } -void parse_events__set_leader(char *name, struct list_head *list, - struct parse_events_state *parse_state) +__weak struct evsel *arch_evlist__leader(struct list_head *list) +{ + return list_entry(list->next, struct evsel, core.node); +} + +struct list_head *parse_events__set_leader(char *name, struct list_head *list, + struct parse_events_state *parse_state) { struct evsel *leader; if (list_empty(list)) { WARN_ONCE(true, "WARNING: failed to set leader: empty list"); - return; + return NULL; } if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) - return; + return NULL; - leader = list_entry(list->next, struct evsel, core.node); + leader = arch_evlist__leader(list); __perf_evlist__set_leader(list, &leader->core); leader->group_name = name ? strdup(name) : NULL; + return &leader->core.node; } /* list_event is assumed to point to malloc'ed memory */ diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index c7fc93f54577..8a6e6b4d5cbe 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -211,8 +211,8 @@ int parse_events_copy_term_list(struct list_head *old, enum perf_pmu_event_symbol_type perf_pmu__parse_check(const char *name); -void parse_events__set_leader(char *name, struct list_head *list, - struct parse_events_state *parse_state); +struct list_head *parse_events__set_leader(char *name, struct list_head *list, + struct parse_events_state *parse_state); void parse_events_update_lists(struct list_head *list_event, struct list_head *list_all); void parse_events_evlist_error(struct parse_events_state *parse_state, diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y index 174158982fae..5358c400f938 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -199,20 +199,24 @@ group_def group_def: PE_NAME '{' events '}' { - struct list_head *list = $3; + struct list_head *new_head, *list = $3; inc_group_count(list, _parse_state); - parse_events__set_leader($1, list, _parse_state); + new_head = parse_events__set_leader($1, list, _parse_state); + if (new_head) + list_move(new_head, list); free($1); $$ = list; } | '{' events '}' { - struct list_head *list = $2; + struct list_head *new_head, *list = $2; inc_group_count(list, _parse_state); - parse_events__set_leader(NULL, list, _parse_state); + new_head = parse_events__set_leader(NULL, list, _parse_state); + if (new_head) + list_move(new_head, list); $$ = list; } -- 2.34.0.rc1.387.gb447b232ab-goog