From patchwork Sat Apr 11 07:46:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 221273 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 5A3D5C2BBC7 for ; Sat, 11 Apr 2020 07:46:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1235E20732 for ; Sat, 11 Apr 2020 07:46:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="J4jNDnAC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726718AbgDKHqu (ORCPT ); Sat, 11 Apr 2020 03:46:50 -0400 Received: from mail-pf1-f202.google.com ([209.85.210.202]:54110 "EHLO mail-pf1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726692AbgDKHqt (ORCPT ); Sat, 11 Apr 2020 03:46:49 -0400 Received: by mail-pf1-f202.google.com with SMTP id i26so3766968pfk.20 for ; Sat, 11 Apr 2020 00:46:46 -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=X1Gidm0Gt3kRgute8DbJxeZNzZuREGI+sAjSPOrTJ6o=; b=J4jNDnAC3eXP+zBcDMo818J8f5Dw/7rvyJ8lUXgOktmiYohQ9OyJENOWykd7jCYXWD D/8iZinr+jLq1imDbozMYmfIFc+reXT2UVOaOn26lx4YeZsRqR/N2ScGMmdkDtAgvSBz 6ur3V2K9nr6uEYeoasbymbduatY7e2lYaKohAQzV1jSO6rF0/iNkV+6imGQmCxltBS+m Tch0dfMplnL7EMaz5cxgTuzh3yhe5a3VwOOUPulDdBRFJOpEUdEbNy1aRG3iSrNbB8aH zXPi8DKy/YKeIiLKzwYMw7EIjj4mHkLYdUF29DKwO540eu4y04zBpB6BySvHsiWxTuFB eLcA== 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=X1Gidm0Gt3kRgute8DbJxeZNzZuREGI+sAjSPOrTJ6o=; b=HgS6wenATuUOZcOXeOfXxK8Ge/nAYYs4cmFjGAIu93+7PMmzRrLPwRBn1DNKPCzKIF wK3rC4CbolmBIdjQIGfYzDT4ilMOvpnhSoYqlSopvRTwGuX2+Etc6d/jvrjfNy326mQE 8JFIPjB9Nj92cYafdeXSmdBtrRygfw9ZYvjRn15uxHvkXI0wz0+7SnVuHY0nEWTdNiZh +iUi5P58Dpqj9pP41j+EwJjVu1iideCaQ7eNPyslJGqdQKJgdXYGMNlFy8mNJdWtr86M in80jFlnNt3bCtP+1K/zdpMdkK0wWWHqobHtVtAu5jk9R7PhnfkOJUkvivbFmCONrYSQ CE1g== X-Gm-Message-State: AGi0PuaFs/24CD/Qq3Ha/Uo4yjnR4ZY9c2gJLRtDaR0wpTi+Hz8JIZg1 Eph1DZUxZjlP48NdzKUAY/eoRTqLvXwl X-Google-Smtp-Source: APiQypK/TMZUe1/MrLBgfUyapyv2cGb4zZsDqN+YsTGYBtnq05cTKGwYw7WyOaVxMbO2a/IITEszVA21W9Qk X-Received: by 2002:a17:90a:c08c:: with SMTP id o12mr9641218pjs.16.1586591206259; Sat, 11 Apr 2020 00:46:46 -0700 (PDT) Date: Sat, 11 Apr 2020 00:46:31 -0700 In-Reply-To: <20200411074631.9486-1-irogers@google.com> Message-Id: <20200411074631.9486-5-irogers@google.com> Mime-Version: 1.0 References: <20200411074631.9486-1-irogers@google.com> X-Mailer: git-send-email 2.26.0.110.g2183baf09c-goog Subject: [PATCH v8 4/4] perf tools: add support for libpfm4 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 , Yonghong Song , Andrii Nakryiko , Greg Kroah-Hartman , Thomas Gleixner , Igor Lubashev , Alexey Budankov , Florian Fainelli , Adrian Hunter , Andi Kleen , Jiwei Sun , yuzhoujian , Kan Liang , Jin Yao , Leo Yan , John Garry , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Stephane Eranian This patch links perf with the libpfm4 library if it is available and NO_LIBPFM4 isn't passed to the build. The libpfm4 library contains hardware event tables for all processors supported by perf_events. It is a helper library that helps convert from a symbolic event name to the event encoding required by the underlying kernel interface. This library is open-source and available from: http://perfmon2.sf.net. With this patch, it is possible to specify full hardware events by name. Hardware filters are also supported. Events must be specified via the --pfm-events and not -e option. Both options are active at the same time and it is possible to mix and match: $ perf stat --pfm-events inst_retired:any_p:c=1:i -e cycles .... Signed-off-by: Stephane Eranian Reviewed-by: Ian Rogers --- tools/perf/Documentation/perf-record.txt | 11 + tools/perf/Documentation/perf-stat.txt | 10 + tools/perf/Documentation/perf-top.txt | 11 + tools/perf/Makefile.config | 12 + tools/perf/Makefile.perf | 6 +- tools/perf/builtin-list.c | 14 +- tools/perf/builtin-record.c | 13 ++ tools/perf/builtin-stat.c | 13 ++ tools/perf/builtin-top.c | 13 ++ tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test.c | 9 + tools/perf/tests/pfm.c | 206 +++++++++++++++++ tools/perf/tests/tests.h | 3 + tools/perf/util/Build | 2 + tools/perf/util/evsel.c | 6 + tools/perf/util/evsel.h | 3 + tools/perf/util/parse-events.c | 37 ++- tools/perf/util/parse-events.h | 5 + tools/perf/util/pfm.c | 272 +++++++++++++++++++++++ tools/perf/util/pfm.h | 19 ++ 20 files changed, 655 insertions(+), 11 deletions(-) create mode 100644 tools/perf/tests/pfm.c create mode 100644 tools/perf/util/pfm.c create mode 100644 tools/perf/util/pfm.h diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index b3f3b3f1c161..ad2c41f595c2 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -596,6 +596,17 @@ Make a copy of /proc/kcore and place it into a directory with the perf data file Limit the sample data max size, is expected to be a number with appended unit character - B/K/M/G +ifdef::HAVE_LIBPFM[] +--pfm-events events:: +Select a PMU event using libpfm4 syntax (see http://perfmon2.sf.net) +including support for event filters. For example '--pfm-events +inst_retired:any_p:u:c=1:i'. More than one event can be passed to the +option using the comma separator. Hardware events and generic hardware +events cannot be mixed together. The latter must be used with the -e +option. The -e option and this one can be mixed and matched. Events +can be grouped using the {} notation. +endif::HAVE_LIBPFM[] + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-intel-pt[1] diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 4d56586b2fb9..536952ad592c 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -71,6 +71,16 @@ report:: --tid=:: stat events on existing thread id (comma separated list) +ifdef::HAVE_LIBPFM[] +--pfm-events events:: +Select a PMU event using libpfm4 syntax (see http://perfmon2.sf.net) +including support for event filters. For example '--pfm-events +inst_retired:any_p:u:c=1:i'. More than one event can be passed to the +option using the comma separator. Hardware events and generic hardware +events cannot be mixed together. The latter must be used with the -e +option. The -e option and this one can be mixed and matched. Events +can be grouped using the {} notation. +endif::HAVE_LIBPFM[] -a:: --all-cpus:: diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index 487737a725e9..9858e3640b0c 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -319,6 +319,17 @@ Default is to monitor all CPUS. go straight to the histogram browser, just like 'perf top' with no events explicitely specified does. +ifdef::HAVE_LIBPFM[] +--pfm-events events:: +Select a PMU event using libpfm4 syntax (see http://perfmon2.sf.net) +including support for event filters. For example '--pfm-events +inst_retired:any_p:u:c=1:i'. More than one event can be passed to the +option using the comma separator. Hardware events and generic hardware +events cannot be mixed together. The latter must be used with the -e +option. The -e option and this one can be mixed and matched. Events +can be grouped using the {} notation. +endif::HAVE_LIBPFM[] + INTERACTIVE PROMPTING KEYS -------------------------- diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 12a8204d63c6..26167ad38a47 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -1012,6 +1012,18 @@ ifdef LIBCLANGLLVM endif endif +ifndef NO_LIBPFM4 + ifeq ($(feature-libpfm4), 1) + CFLAGS += -DHAVE_LIBPFM + EXTLIBS += -lpfm + ASCIIDOC_EXTRA = -aHAVE_LIBPFM=1 + $(call detected,CONFIG_LIBPFM4) + else + msg := $(warning libpfm4 not found, disables libpfm4 support. Please install libpfm4-dev); + NO_LIBPFM4 := 1 + endif +endif + # Among the variables below, these: # perfexecdir # perf_include_dir diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index d15a311408f1..9787eb3ca0a9 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -118,6 +118,8 @@ include ../scripts/utilities.mak # # Define LIBBPF_DYNAMIC to enable libbpf dynamic linking. # +# Define NO_LIBPFM4 to disable libpfm4 extension. +# # As per kernel Makefile, avoid funny character set dependencies unexport LC_ALL @@ -188,7 +190,7 @@ AWK = awk # non-config cases config := 1 -NON_CONFIG_TARGETS := clean python-clean TAGS tags cscope help install-doc install-man install-html install-info install-pdf doc man html info pdf +NON_CONFIG_TARGETS := clean python-clean TAGS tags cscope help ifdef MAKECMDGOALS ifeq ($(filter-out $(NON_CONFIG_TARGETS),$(MAKECMDGOALS)),) @@ -832,7 +834,7 @@ INSTALL_DOC_TARGETS += quick-install-doc quick-install-man quick-install-html # 'make doc' should call 'make -C Documentation all' $(DOC_TARGETS): - $(Q)$(MAKE) -C $(DOC_DIR) O=$(OUTPUT) $(@:doc=all) + $(Q)$(MAKE) -C $(DOC_DIR) O=$(OUTPUT) $(@:doc=all) ASCIIDOC_EXTRA=$(ASCIIDOC_EXTRA) TAG_FOLDERS= . ../lib ../include TAG_FILES= ../../include/uapi/linux/perf_event.h diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c index 965ef017496f..7b64cd34266e 100644 --- a/tools/perf/builtin-list.c +++ b/tools/perf/builtin-list.c @@ -18,6 +18,10 @@ #include #include +#ifdef HAVE_LIBPFM +#include "util/pfm.h" +#endif + static bool desc_flag = true; static bool details_flag; @@ -45,7 +49,7 @@ int cmd_list(int argc, const char **argv) "perf list [] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]", NULL }; - + const char *header = "\nList of pre-defined events (to be used in -e):\n\n"; set_option_flag(list_options, 0, "raw-dump", PARSE_OPT_HIDDEN); argc = parse_options(argc, argv, list_options, list_usage, @@ -53,8 +57,14 @@ int cmd_list(int argc, const char **argv) setup_pager(); +#ifdef HAVE_LIBPFM + libpfm_initialize(); + + header = "\nList of pre-defined events (to be used in -e or --pfm-events):\n\n"; +#endif + if (!raw_dump && pager_in_use()) - printf("\nList of pre-defined events (to be used in -e):\n\n"); + puts(header); if (argc == 0) { print_events(NULL, raw_dump, !desc_flag, long_desc_flag, diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 1ab349abe904..66705265440e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -64,6 +64,10 @@ #include #include +#ifdef HAVE_LIBPFM +#include "util/pfm.h" +#endif + struct switch_output { bool enabled; bool signal; @@ -2421,6 +2425,11 @@ static struct option __record_options[] = { #endif OPT_CALLBACK(0, "max-size", &record.output_max_size, "size", "Limit the maximum size of the output file", parse_output_max_size), +#ifdef HAVE_LIBPFM + OPT_CALLBACK(0, "pfm-events", &record.evlist, "event", + "libpfm4 event selector. use 'perf list' to list available events", + parse_libpfm_events_option), +#endif OPT_END() }; @@ -2461,6 +2470,10 @@ int cmd_record(int argc, const char **argv) if (rec->evlist == NULL) return -ENOMEM; +#ifdef HAVE_LIBPFM + libpfm_initialize(); +#endif + err = perf_config(perf_record_config, rec); if (err) return err; diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index ec053dc1e35c..27fc96ee2436 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -89,6 +89,10 @@ #include #include +#ifdef HAVE_LIBPFM +#include "util/pfm.h" +#endif + #define DEFAULT_SEPARATOR " " #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" @@ -933,6 +937,11 @@ static struct option stat_options[] = { "Use with 'percore' event qualifier to show the event " "counts of one hardware thread by sum up total hardware " "threads of same physical core"), +#ifdef HAVE_LIBPFM + OPT_CALLBACK(0, "pfm-events", &evsel_list, "event", + "libpfm4 event selector. use 'perf list' to list available events", + parse_libpfm_events_option), +#endif OPT_END() }; @@ -1871,6 +1880,10 @@ int cmd_stat(int argc, const char **argv) unsigned int interval, timeout; const char * const stat_subcommands[] = { "record", "report" }; +#ifdef HAVE_LIBPFM + libpfm_initialize(); +#endif + setlocale(LC_ALL, ""); evsel_list = evlist__new(); diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 289cf83e658a..bf4c2e820536 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -84,6 +84,10 @@ #include #include +#ifdef HAVE_LIBPFM +#include "util/pfm.h" +#endif + static volatile int done; static volatile int resize; @@ -1571,6 +1575,11 @@ int cmd_top(int argc, const char **argv) "Sort the output by the event at the index n in group. " "If n is invalid, sort by the first event. " "WARNING: should be used on grouped events."), +#ifdef HAVE_LIBPFM + OPT_CALLBACK(0, "pfm-events", &top.evlist, "event", + "libpfm4 event selector. use 'perf list' to list available events", + parse_libpfm_events_option), +#endif OPTS_EVSWITCH(&top.evswitch), OPT_END() }; @@ -1584,6 +1593,10 @@ int cmd_top(int argc, const char **argv) if (status < 0) return status; +#ifdef HAVE_LIBPFM + libpfm_initialize(); +#endif + top.annotation_opts.min_pcnt = 5; top.annotation_opts.context = 4; diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index b3d1bf13ca07..7d2ccec9fd75 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -56,6 +56,7 @@ perf-y += mem2node.o perf-y += maps.o perf-y += time-utils-test.o perf-y += genelf.o +perf-y += pfm.o $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build $(call rule_mkdir) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index b6322eb0f423..8b323151f22c 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -313,6 +313,15 @@ static struct test generic_tests[] = { .desc = "maps__merge_in", .func = test__maps__merge_in, }, + { + .desc = "Test libpfm4 support", + .func = test__pfm, + .subtest = { + .skip_if_fail = true, + .get_nr = test__pfm_subtest_get_nr, + .get_desc = test__pfm_subtest_get_desc, + } + }, { .func = NULL, }, diff --git a/tools/perf/tests/pfm.c b/tools/perf/tests/pfm.c new file mode 100644 index 000000000000..e33b89316711 --- /dev/null +++ b/tools/perf/tests/pfm.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test support for libpfm4 event encodings. + * + * Copyright 2020 Google LLC. + */ +#include "tests.h" +#include "util/debug.h" +#include "util/evlist.h" +#include "util/pfm.h" + +#include + +#ifdef HAVE_LIBPFM +static int test__pfm_events(void); +static int test__pfm_group(void); +#endif + +static const struct { + int (*func)(void); + const char *desc; +} pfm_testcase_table[] = { +#ifdef HAVE_LIBPFM + { + .func = test__pfm_events, + .desc = "test of individual --pfm-events", + }, + { + .func = test__pfm_group, + .desc = "test groups of --pfm-events", + }, +#endif +}; + +#ifdef HAVE_LIBPFM +static int count_pfm_events(struct perf_evlist *evlist) +{ + struct perf_evsel *evsel; + int count = 0; + + perf_evlist__for_each_entry(evlist, evsel) { + count++; + } + return count; +} + +static int test__pfm_events(void) +{ + struct evlist *evlist; + struct option opt; + size_t i; + const struct { + const char *events; + int nr_events; + } table[] = { + { + .events = "", + .nr_events = 0, + }, + { + .events = "instructions", + .nr_events = 1, + }, + { + .events = "instructions,cycles", + .nr_events = 2, + }, + { + .events = "stereolab", + .nr_events = 0, + }, + { + .events = "instructions,instructions", + .nr_events = 2, + }, + { + .events = "stereolab,instructions", + .nr_events = 0, + }, + { + .events = "instructions,stereolab", + .nr_events = 1, + }, + }; + + libpfm_initialize(); + + for (i = 0; i < ARRAY_SIZE(table); i++) { + evlist = evlist__new(); + if (evlist == NULL) + return -ENOMEM; + + opt.value = evlist; + parse_libpfm_events_option(&opt, + table[i].events, + 0); + TEST_ASSERT_EQUAL(table[i].events, + count_pfm_events(&evlist->core), + table[i].nr_events); + TEST_ASSERT_EQUAL(table[i].events, + evlist->nr_groups, + 0); + + evlist__delete(evlist); + } + return 0; +} + +static int test__pfm_group(void) +{ + struct evlist *evlist; + struct option opt; + size_t i; + const struct { + const char *events; + int nr_events; + int nr_groups; + } table[] = { + { + .events = "{},", + .nr_events = 0, + .nr_groups = 0, + }, + { + .events = "{instructions}", + .nr_events = 1, + .nr_groups = 1, + }, + { + .events = "{instructions},{}", + .nr_events = 1, + .nr_groups = 1, + }, + { + .events = "{},{instructions}", + .nr_events = 0, + .nr_groups = 0, + }, + { + .events = "{instructions},{instructions}", + .nr_events = 2, + .nr_groups = 2, + }, + { + .events = "{instructions,cycles},{instructions,cycles}", + .nr_events = 4, + .nr_groups = 2, + }, + { + .events = "{stereolab}", + .nr_events = 0, + .nr_groups = 0, + }, + { + .events = "{instructions,cycles},{instructions,stereolab}", + .nr_events = 3, + .nr_groups = 1, + }, + }; + + libpfm_initialize(); + + for (i = 0; i < ARRAY_SIZE(table); i++) { + evlist = evlist__new(); + if (evlist == NULL) + return -ENOMEM; + + opt.value = evlist; + parse_libpfm_events_option(&opt, + table[i].events, + 0); + TEST_ASSERT_EQUAL(table[i].events, + count_pfm_events(&evlist->core), + table[i].nr_events); + TEST_ASSERT_EQUAL(table[i].events, + evlist->nr_groups, + table[i].nr_groups); + + evlist__delete(evlist); + } + return 0; +} +#endif + +const char *test__pfm_subtest_get_desc(int i) +{ + if (i < 0 || i >= (int)ARRAY_SIZE(pfm_testcase_table)) + return NULL; + return pfm_testcase_table[i].desc; +} + +int test__pfm_subtest_get_nr(void) +{ + return (int)ARRAY_SIZE(pfm_testcase_table); +} + +int test__pfm(struct test *test __maybe_unused, int i __maybe_unused) +{ +#ifdef HAVE_LIBPFM + if (i < 0 || i >= (int)ARRAY_SIZE(pfm_testcase_table)) + return TEST_FAIL; + return pfm_testcase_table[i].func(); +#else + return TEST_SKIP; +#endif +} diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index 61a1ab032080..47cbae753b42 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -112,6 +112,9 @@ int test__mem2node(struct test *t, int subtest); int test__maps__merge_in(struct test *t, int subtest); int test__time_utils(struct test *t, int subtest); int test__jit_write_elf(struct test *test, int subtest); +int test__pfm(struct test *test, int subtest); +const char *test__pfm_subtest_get_desc(int subtest); +int test__pfm_subtest_get_nr(void); bool test__bp_signal_is_supported(void); bool test__bp_account_is_supported(void); diff --git a/tools/perf/util/Build b/tools/perf/util/Build index c0cf8dff694e..afd3d2221c83 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -177,6 +177,8 @@ perf-$(CONFIG_LIBBPF) += bpf-event.o perf-$(CONFIG_CXX) += c++/ +perf-$(CONFIG_LIBPFM4) += pfm.o + CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))" CFLAGS_llvm-utils.o += -DPERF_INCLUDE_DIR="BUILD_STR($(perf_include_dir_SQ))" diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index d23db6755f51..83ad76d3d2be 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2447,9 +2447,15 @@ bool perf_evsel__fallback(struct evsel *evsel, int err, const char *sep = ":"; /* Is there already the separator in the name. */ +#ifndef HAVE_LIBPFM if (strchr(name, '/') || strchr(name, ':')) sep = ""; +#else + if (strchr(name, '/') || + (strchr(name, ':') && !evsel->is_libpfm_event)) + sep = ""; +#endif if (asprintf(&new_name, "%s%su", name, sep) < 0) return false; diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 53187c501ee8..397d335d5e24 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -76,6 +76,9 @@ struct evsel { bool ignore_missing_thread; bool forced_leader; bool use_uncore_alias; +#ifdef HAVE_LIBPFM + bool is_libpfm_event; +#endif /* parse modifier helper */ int exclude_GH; int sample_read; diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 10107747b361..f6b300149365 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -37,6 +37,10 @@ #include "util/evsel_config.h" #include "util/event.h" +#ifdef HAVE_LIBPFM +#include "util/pfm.h" +#endif + #define MAX_NAME_LEN 100 #ifdef PARSER_DEBUG @@ -344,6 +348,7 @@ static char *get_config_name(struct list_head *head_terms) static struct evsel * __add_event(struct list_head *list, int *idx, struct perf_event_attr *attr, + bool init_attr, char *name, struct perf_pmu *pmu, struct list_head *config_terms, bool auto_merge_stats, const char *cpu_list) @@ -352,7 +357,8 @@ __add_event(struct list_head *list, int *idx, struct perf_cpu_map *cpus = pmu ? pmu->cpus : cpu_list ? perf_cpu_map__new(cpu_list) : NULL; - event_attr_init(attr); + if (init_attr) + event_attr_init(attr); evsel = perf_evsel__new_idx(attr, *idx); if (!evsel) @@ -370,15 +376,27 @@ __add_event(struct list_head *list, int *idx, if (config_terms) list_splice(config_terms, &evsel->config_terms); - list_add_tail(&evsel->core.node, list); + if (list) + list_add_tail(&evsel->core.node, list); + return evsel; } +#ifdef HAVE_LIBPFM +struct evsel *parse_events__pfm_add_event(int idx, struct perf_event_attr *attr, + char *name, struct perf_pmu *pmu) +{ + return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false, + NULL); +} +#endif + static int add_event(struct list_head *list, int *idx, struct perf_event_attr *attr, char *name, struct list_head *config_terms) { - return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM; + return __add_event(list, idx, attr, true, name, NULL, config_terms, + false, NULL) ? 0 : -ENOMEM; } static int add_event_tool(struct list_head *list, int *idx, @@ -390,7 +408,8 @@ static int add_event_tool(struct list_head *list, int *idx, .config = PERF_COUNT_SW_DUMMY, }; - evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0"); + evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false, + "0"); if (!evsel) return -ENOMEM; evsel->tool_event = tool_event; @@ -1446,8 +1465,8 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, if (!head_config) { attr.type = pmu->type; - evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, - auto_merge_stats, NULL); + evsel = __add_event(list, &parse_state->idx, &attr, true, NULL, + pmu, NULL, auto_merge_stats, NULL); if (evsel) { evsel->pmu_name = name ? strdup(name) : NULL; evsel->use_uncore_alias = use_uncore_alias; @@ -1487,7 +1506,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, return -EINVAL; } - evsel = __add_event(list, &parse_state->idx, &attr, + evsel = __add_event(list, &parse_state->idx, &attr, true, get_config_name(head_config), pmu, &config_terms, auto_merge_stats, NULL); if (evsel) { @@ -2794,6 +2813,10 @@ void print_events(const char *event_glob, bool name_only, bool quiet_flag, print_sdt_events(NULL, NULL, name_only); metricgroup__print(true, true, NULL, name_only, details_flag); + +#ifdef HAVE_LIBPFM + print_libpfm_events(name_only, long_desc); +#endif } int parse_events__is_hardcoded_term(struct parse_events_term *term) diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index 27596cbd0ba0..f13598a9785b 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -185,6 +185,11 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, struct list_head *head_config, bool auto_merge_stats, bool use_alias); +#ifdef HAVE_LIBPFM +struct perf_pmu; +struct evsel *parse_events__pfm_add_event(int idx, struct perf_event_attr *attr, + char *name, struct perf_pmu *pmu); +#endif int parse_events_multi_pmu_add(struct parse_events_state *parse_state, char *str, diff --git a/tools/perf/util/pfm.c b/tools/perf/util/pfm.c new file mode 100644 index 000000000000..de5df2b686a3 --- /dev/null +++ b/tools/perf/util/pfm.c @@ -0,0 +1,272 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Support for libpfm4 event encoding. + * + * Copyright 2020 Google LLC. + */ +#include "util/cpumap.h" +#include "util/debug.h" +#include "util/event.h" +#include "util/evlist.h" +#include "util/evsel.h" +#include "util/parse-events.h" +#include "util/pmu.h" +#include "util/pfm.h" + +#include +#include +#include + +void libpfm_initialize(void) +{ + int ret; + + ret = pfm_initialize(); + if (ret != PFM_SUCCESS) { + ui__warning("libpfm failed to initialize: %s\n", + pfm_strerror(ret)); + } +} + +int parse_libpfm_events_option(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct evlist *evlist = *(struct evlist **)opt->value; + struct perf_event_attr attr; + struct perf_pmu *pmu; + struct evsel *evsel, *grp_leader = NULL; + char *p, *q, *p_orig; + const char *sep; + int grp_evt = -1; + int ret; + + p_orig = p = strdup(str); + if (!p) + return -1; + /* + * force loading of the PMU list + */ + perf_pmu__scan(NULL); + + for (q = p; strsep(&p, ",{}"); q = p) { + sep = p ? str + (p - p_orig - 1) : ""; + if (*sep == '{') { + if (grp_evt > -1) { + ui__error("nested event groups not supported\n"); + goto error; + } + grp_evt++; + } + + /* no event */ + if (*q == '\0') + continue; + + memset(&attr, 0, sizeof(attr)); + event_attr_init(&attr); + + ret = pfm_get_perf_event_encoding(q, PFM_PLM0|PFM_PLM3, + &attr, NULL, NULL); + + if (ret != PFM_SUCCESS) { + ui__error("failed to parse event %s : %s\n", str, + pfm_strerror(ret)); + goto error; + } + + pmu = perf_pmu__find_by_type((unsigned int)attr.type); + evsel = parse_events__pfm_add_event(evlist->core.nr_entries, + &attr, q, pmu); + if (evsel == NULL) + goto error; + + evsel->is_libpfm_event = true; + + evlist__add(evlist, evsel); + + if (grp_evt == 0) + grp_leader = evsel; + + if (grp_evt > -1) { + evsel->leader = grp_leader; + grp_leader->core.nr_members++; + grp_evt++; + } + + if (*sep == '}') { + if (grp_evt < 0) { + ui__error("cannot close a non-existing event group\n"); + goto error; + } + evlist->nr_groups++; + grp_leader = NULL; + grp_evt = -1; + } + evsel->is_libpfm_event = true; + } + return 0; +error: + free(p_orig); + return -1; +} + +static const char *srcs[PFM_ATTR_CTRL_MAX] = { + [PFM_ATTR_CTRL_UNKNOWN] = "???", + [PFM_ATTR_CTRL_PMU] = "PMU", + [PFM_ATTR_CTRL_PERF_EVENT] = "perf_event", +}; + +static void +print_attr_flags(pfm_event_attr_info_t *info) +{ + int n = 0; + + if (info->is_dfl) { + printf("[default] "); + n++; + } + + if (info->is_precise) { + printf("[precise] "); + n++; + } + + if (!n) + printf("- "); +} + +static void +print_libpfm_events_detailed(pfm_event_info_t *info, bool long_desc) +{ + pfm_event_attr_info_t ainfo; + const char *src; + int j, ret; + + ainfo.size = sizeof(ainfo); + + printf(" %s\n", info->name); + printf(" [%s]\n", info->desc); + if (long_desc) { + if (info->equiv) + printf(" Equiv: %s\n", info->equiv); + + printf(" Code : 0x%"PRIx64"\n", info->code); + } + pfm_for_each_event_attr(j, info) { + ret = pfm_get_event_attr_info(info->idx, j, + PFM_OS_PERF_EVENT_EXT, &ainfo); + if (ret != PFM_SUCCESS) + continue; + + if (ainfo.type == PFM_ATTR_UMASK) { + printf(" %s:%s\n", info->name, ainfo.name); + printf(" [%s]\n", ainfo.desc); + } + + if (!long_desc) + continue; + + if (ainfo.ctrl >= PFM_ATTR_CTRL_MAX) + ainfo.ctrl = PFM_ATTR_CTRL_UNKNOWN; + + src = srcs[ainfo.ctrl]; + switch (ainfo.type) { + case PFM_ATTR_UMASK: + printf(" Umask : 0x%02"PRIx64" : %s: ", ainfo.code, src); + print_attr_flags(&ainfo); + putchar('\n'); + break; + case PFM_ATTR_MOD_BOOL: + printf(" Modif : %s: [%s] : %s (boolean)\n", src, ainfo.name, ainfo.desc); + break; + case PFM_ATTR_MOD_INTEGER: + printf(" Modif : %s: [%s] : %s (integer)\n", src, ainfo.name, ainfo.desc); + break; + case PFM_ATTR_NONE: + case PFM_ATTR_RAW_UMASK: + case PFM_ATTR_MAX: + default: + printf(" Attr : %s: [%s] : %s\n", src, ainfo.name, ainfo.desc); + } + } +} + +/* + * list all pmu::event:umask, pmu::event + * printed events may not be all valid combinations of umask for an event + */ +static void +print_libpfm_events_raw(pfm_pmu_info_t *pinfo, pfm_event_info_t *info) +{ + pfm_event_attr_info_t ainfo; + int j, ret; + bool has_umask = false; + + ainfo.size = sizeof(ainfo); + + pfm_for_each_event_attr(j, info) { + ret = pfm_get_event_attr_info(info->idx, j, + PFM_OS_PERF_EVENT_EXT, &ainfo); + if (ret != PFM_SUCCESS) + continue; + + if (ainfo.type != PFM_ATTR_UMASK) + continue; + + printf("%s::%s:%s\n", pinfo->name, info->name, ainfo.name); + has_umask = true; + } + if (!has_umask) + printf("%s::%s\n", pinfo->name, info->name); +} + +void print_libpfm_events(bool name_only, bool long_desc) +{ + pfm_event_info_t info; + pfm_pmu_info_t pinfo; + int i, p, ret; + + /* initialize to zero to indicate ABI version */ + info.size = sizeof(info); + pinfo.size = sizeof(pinfo); + + if (!name_only) + putchar('\n'); + + pfm_for_all_pmus(p) { + bool printed_pmu = false; + + ret = pfm_get_pmu_info(p, &pinfo); + if (ret != PFM_SUCCESS) + continue; + + /* only print events that are supported by host HW */ + if (!pinfo.is_present) + continue; + + /* handled by perf directly */ + if (pinfo.pmu == PFM_PMU_PERF_EVENT) + continue; + + for (i = pinfo.first_event; i != -1; + i = pfm_get_event_next(i)) { + + ret = pfm_get_event_info(i, PFM_OS_PERF_EVENT_EXT, + &info); + if (ret != PFM_SUCCESS) + continue; + + if (!name_only && !printed_pmu) { + printf("%s pfm-events\n", pinfo.name); + printed_pmu = true; + } + + if (!name_only) + print_libpfm_events_detailed(&info, long_desc); + else + print_libpfm_events_raw(&pinfo, &info); + } + if (!name_only && printed_pmu) + putchar('\n'); + } +} diff --git a/tools/perf/util/pfm.h b/tools/perf/util/pfm.h new file mode 100644 index 000000000000..22d525726df9 --- /dev/null +++ b/tools/perf/util/pfm.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Support for libpfm4 event encoding. + * + * Copyright 2020 Google LLC. + */ +#ifndef __PERF_PFM_H +#define __PERF_PFM_H + +#include + +void libpfm_initialize(void); + +int parse_libpfm_events_option(const struct option *opt, const char *str, + int unset); + +void print_libpfm_events(bool name_only, bool long_desc); + +#endif /* __PERF_PFM_H */