From patchwork Fri May 15 22:17:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 1291699 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=Rwn/0w8W; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49P2pn4hwGz9sTM for ; Sat, 16 May 2020 08:17:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727083AbgEOWRv (ORCPT ); Fri, 15 May 2020 18:17:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727884AbgEOWRu (ORCPT ); Fri, 15 May 2020 18:17:50 -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 D56BEC05BD09 for ; Fri, 15 May 2020 15:17:49 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id n7so4250701ybh.13 for ; Fri, 15 May 2020 15:17:49 -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=Qx5DR7q9yKe+bR/yiFue61eKIkA72C71MJNDdOxOzy4=; b=Rwn/0w8WxYuhUpX/zciil6SxoMXHnIKaLCZPxHlN9pzaMX71ALqRWzgYEXMLeBZiys Ava8ynDGhAuD9fMF4jIBKyeKWjLmxyzk+zbxtEhP2TBK6SQneBp9uMZdgz+Joy5YHhW9 VhDldwJ0CS7dKsqTpd0oo8YrQ7pNFQgG5FB1jCEKPKoG7B06H5vT6HDjawh3ksWemrX8 A1vs87z0jkAOyk+SdHyYPgdRLksC0m8N/NsBFlWOARYi1pTO1UFP3ABB7mzoc02l97eE W++A9p5XcZnXPyHW1bEInLp3F6hhNKl22RfGCZT58eauBlnsOZR0KNPHAcF5u4cQfvLh EHFQ== 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=Qx5DR7q9yKe+bR/yiFue61eKIkA72C71MJNDdOxOzy4=; b=kOHEMVHcqGUN0n/SXTDIfnJq48vjf0Hd3b2KpUlkvyFpmX3/wzqHUj1VWspWedEIcA +ppQaWU8Dn1CsW5AqcXRLRtkZWmmF8cdK5XvngCVtP9uu7diPJi02qhIh3TmGRx1ls2+ NqAjLlvhIgGWw4TURdGh4pXsRDrEi77lxsRX20InoyX/Vf6TZ59YHlK/A/YpIaEN3YXF 4/u/Jiehi5il/ZTzPt7XAc6kziBucWgALCtA8inNY8OY8X7MTEImV0XjCymqUUsIXGbD fdWXVM0uJAHMmGqVhDpzcYXyiUZgsYXqt7OR2chRa2sVrLRS+/MdPg9RlJVMEpS8C3nc Bgvw== X-Gm-Message-State: AOAM530wqeejvbgL/83Kh2xEnEwzaDcQyeDhu/WGvPwLTwxo2wMW/bmI 3NDEmcw3JJAe4yQwL0CoHHzcQ9y4Mntu X-Google-Smtp-Source: ABdhPJx/oVUXEZPTRJ/jHqEoXA9V4xEQiHjmHVNLIxCe0F3WhTGlxuUUTaksUrl22/Ycyr48eGh1u55Z3IMf X-Received: by 2002:a25:7389:: with SMTP id o131mr9874733ybc.267.1589581069054; Fri, 15 May 2020 15:17:49 -0700 (PDT) Date: Fri, 15 May 2020 15:17:31 -0700 In-Reply-To: <20200515221732.44078-1-irogers@google.com> Message-Id: <20200515221732.44078-7-irogers@google.com> Mime-Version: 1.0 References: <20200515221732.44078-1-irogers@google.com> X-Mailer: git-send-email 2.26.2.761.g0e0b3e54be-goog Subject: [PATCH v3 6/7] perf test: Improve pmu event metric testing 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 , Adrian Hunter , Leo Yan , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Cc: Stephane Eranian , Ian Rogers , Paul Clarke , Arnaldo Carvalho de Melo Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Break pmu-events test into 2 and add a test to verify that all pmu metric expressions simply parse. Try to parse all metric ids/events, skip/warn if metrics for the current architecture fail to parse. To support warning for a skip, and an ability for a subtest to describe why it skips. Tested on power9, skylakex, haswell, broadwell, westmere, sandybridge and ivybridge. May skip/warn on other architectures if metrics are invalid. In particular s390 is untested, but its expressions are trivial. The untested architectures with expressions are power8, cascadelakex, tremontx, skylake, jaketown, ivytown and variants of haswell and broadwell. v3. addresses review comments from John Garry , Jiri Olsa and Arnaldo Carvalho de Melo . v2. changes the commit message as event parsing errors no longer cause the test to fail. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Paul Clarke Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200513212933.41273-1-irogers@google.com [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/builtin-test.c | 7 ++ tools/perf/tests/pmu-events.c | 168 ++++++++++++++++++++++++++++++-- tools/perf/tests/tests.h | 3 + 3 files changed, 172 insertions(+), 6 deletions(-) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index baee735e6aa5..9553f8061772 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -75,6 +75,13 @@ static struct test generic_tests[] = { { .desc = "PMU events", .func = test__pmu_events, + .subtest = { + .skip_if_fail = false, + .get_nr = test__pmu_events_subtest_get_nr, + .get_desc = test__pmu_events_subtest_get_desc, + .skip_reason = test__pmu_events_subtest_skip_reason, + }, + }, { .desc = "DSO data read", diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c index d64261da8bf7..e21f0addcfbb 100644 --- a/tools/perf/tests/pmu-events.c +++ b/tools/perf/tests/pmu-events.c @@ -8,6 +8,9 @@ #include #include "debug.h" #include "../pmu-events/pmu-events.h" +#include "util/evlist.h" +#include "util/expr.h" +#include "util/parse-events.h" struct perf_pmu_test_event { struct pmu_event event; @@ -144,7 +147,7 @@ static struct pmu_events_map *__test_pmu_get_events_map(void) } /* Verify generated events from pmu-events.c is as expected */ -static int __test_pmu_event_table(void) +static int test_pmu_event_table(void) { struct pmu_events_map *map = __test_pmu_get_events_map(); struct pmu_event *table; @@ -347,14 +350,11 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count) return res; } -int test__pmu_events(struct test *test __maybe_unused, - int subtest __maybe_unused) + +static int test_aliases(void) { struct perf_pmu *pmu = NULL; - if (__test_pmu_event_table()) - return -1; - while ((pmu = perf_pmu__scan(pmu)) != NULL) { int count = 0; @@ -377,3 +377,159 @@ int test__pmu_events(struct test *test __maybe_unused, return 0; } + +static bool is_number(const char *str) +{ + char *end_ptr; + + strtod(str, &end_ptr); + return end_ptr != str; +} + +static int check_parse_id(const char *id, bool same_cpu, struct pmu_event *pe) +{ + struct parse_events_error error; + struct evlist *evlist; + int ret; + + /* Numbers are always valid. */ + if (is_number(id)) + return 0; + + evlist = evlist__new(); + memset(&error, 0, sizeof(error)); + ret = parse_events(evlist, id, &error); + if (ret && same_cpu) { + pr_warning("Parse event failed metric '%s' id '%s' expr '%s'\n", + pe->metric_name, id, pe->metric_expr); + pr_warning("Error string '%s' help '%s'\n", error.str, + error.help); + } else if (ret) { + pr_debug3("Parse event failed, but for an event that may not be supported by this CPU.\nid '%s' metric '%s' expr '%s'\n", + id, pe->metric_name, pe->metric_expr); + ret = 0; + } + evlist__delete(evlist); + free(error.str); + free(error.help); + free(error.first_str); + free(error.first_help); + return ret; +} + +static void expr_failure(const char *msg, + const struct pmu_events_map *map, + const struct pmu_event *pe) +{ + pr_debug("%s for map %s %s %s\n", + msg, map->cpuid, map->version, map->type); + pr_debug("On metric %s\n", pe->metric_name); + pr_debug("On expression %s\n", pe->metric_expr); +} + +static int test_parsing(void) +{ + struct pmu_events_map *cpus_map = perf_pmu__find_map(NULL); + struct pmu_events_map *map; + struct pmu_event *pe; + int i, j, k; + const char **ids; + int idnum; + int ret = 0; + struct expr_parse_ctx ctx; + double result; + + i = 0; + for (;;) { + map = &pmu_events_map[i++]; + if (!map->table) + break; + j = 0; + for (;;) { + pe = &map->table[j++]; + if (!pe->name && !pe->metric_group && !pe->metric_name) + break; + if (!pe->metric_expr) + continue; + if (expr__find_other(pe->metric_expr, NULL, + &ids, &idnum, 0) < 0) { + expr_failure("Parse other failed", map, pe); + ret++; + continue; + } + expr__ctx_init(&ctx); + + /* + * Add all ids with a made up value. The value may + * trigger divide by zero when subtracted and so try to + * make them unique. + */ + for (k = 0; k < idnum; k++) + expr__add_id(&ctx, ids[k], k + 1); + + for (k = 0; k < idnum; k++) { + if (check_parse_id(ids[k], map == cpus_map, pe)) + ret++; + } + + if (expr__parse(&result, &ctx, pe->metric_expr, 0)) { + expr_failure("Parse failed", map, pe); + ret++; + } + for (k = 0; k < idnum; k++) + zfree(&ids[k]); + free(ids); + } + } + /* TODO: fail when not ok */ + return ret == 0 ? TEST_OK : TEST_SKIP; +} + +static const struct { + int (*func)(void); + const char *desc; +} pmu_events_testcase_table[] = { + { + .func = test_pmu_event_table, + .desc = "PMU event table sanity", + }, + { + .func = test_aliases, + .desc = "PMU event map aliases", + }, + { + .func = test_parsing, + .desc = "Parsing of PMU event table metrics", + }, +}; + +const char *test__pmu_events_subtest_get_desc(int subtest) +{ + if (subtest < 0 || + subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table)) + return NULL; + return pmu_events_testcase_table[subtest].desc; +} + +const char *test__pmu_events_subtest_skip_reason(int subtest) +{ + if (subtest < 0 || + subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table)) + return NULL; + if (pmu_events_testcase_table[subtest].func != test_parsing) + return NULL; + return "some metrics failed"; +} + +int test__pmu_events_subtest_get_nr(void) +{ + return (int)ARRAY_SIZE(pmu_events_testcase_table); +} + +int test__pmu_events(struct test *test __maybe_unused, int subtest) +{ + if (subtest < 0 || + subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table)) + return TEST_FAIL; + return pmu_events_testcase_table[subtest].func(); +} diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index 88e45aeab94f..6c6c4b6a4796 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -51,6 +51,9 @@ int test__perf_evsel__tp_sched_test(struct test *test, int subtest); int test__syscall_openat_tp_fields(struct test *test, int subtest); int test__pmu(struct test *test, int subtest); int test__pmu_events(struct test *test, int subtest); +const char *test__pmu_events_subtest_get_desc(int subtest); +const char *test__pmu_events_subtest_skip_reason(int subtest); +int test__pmu_events_subtest_get_nr(void); int test__attr(struct test *test, int subtest); int test__dso_data(struct test *test, int subtest); int test__dso_data_cache(struct test *test, int subtest);