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AJvYcCWs3DhfRlsv4el9ov+7CC/Ze5dv6m3lsyS0w47TnWdOOlsNpFFCDo4dcTsFSZ+8iR8shFo=@vger.kernel.org X-Gm-Message-State: AOJu0YxffsSgiJOzwmbjJ/aKJ0jwg51vHCwX2YT+DHORaVh0HLuXjkkh GQjbY/GZJglrOU31G7Z0GsJqNFMIgmYO3KhRg9JfIh2H2NnNbsCLcj4bQPmQRuhxNlOUw7yud2A poCJ27g== X-Google-Smtp-Source: AGHT+IHBZDUkpvQeZy3FcJFEfq6MwwNIBVkBtMOFeNRB923rmDP/2fgHlbt3fG9m5NJ+kGqdWoMsGqsCws9N X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:a2bc:ec03:1143:41ab]) (user=irogers job=sendgmr) by 2002:a81:fb07:0:b0:6ef:5e7a:aa72 with SMTP id 00721157ae682-6f3f8261ee6mr171607b3.8.1734809227308; Sat, 21 Dec 2024 11:27:07 -0800 (PST) Date: Sat, 21 Dec 2024 11:26:54 -0800 In-Reply-To: <20241221192654.94344-1-irogers@google.com> Message-Id: <20241221192654.94344-5-irogers@google.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241221192654.94344-1-irogers@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Subject: [PATCH v3 4/4] perf parse-events: Reapply "Prefer sysfs/JSON hardware events over legacy" From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Ze Gao , Weilin Wang , Dominique Martinet , Jean-Philippe Romain , Junhao He , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, Aditya Bodkhe Cc: Atish Patra , Leo Yan , Beeman Strong , Arnaldo Carvalho de Melo Originally posted and merged from: https://lore.kernel.org/r/20240416061533.921723-10-irogers@google.com This reverts commit 4f1b067359ac8364cdb7f9fda41085fa85789d0f although the patch is now smaller due to related fixes being applied in commit 22a4db3c3603 ("perf evsel: Add alternate_hw_config and use in evsel__match"). The original commit message was: It was requested that RISC-V be able to add events to the perf tool so the PMU driver didn't need to map legacy events to config encodings: https://lore.kernel.org/lkml/20240217005738.3744121-1-atishp@rivosinc.com/ This change makes the priority of events specified without a PMU the same as those specified with a PMU, namely sysfs and JSON events are checked first before using the legacy encoding. The hw_term is made more generic as a hardware_event that encodes a pair of string and int value, allowing parse_events_multi_pmu_add to fall back on a known encoding when the sysfs/JSON adding fails for core events. As this covers PE_VALUE_SYM_HW, that token is removed and related code simplified. Signed-off-by: Ian Rogers Reviewed-by: Kan Liang Tested-by: Atish Patra Tested-by: James Clark Tested-by: Leo Yan Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Beeman Strong Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/parse-events.c | 26 +++++++++--- tools/perf/util/parse-events.l | 76 +++++++++++++++++----------------- tools/perf/util/parse-events.y | 60 ++++++++++++++++++--------- 3 files changed, 98 insertions(+), 64 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 1e23faa364b1..3a60fca53cfa 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1545,8 +1545,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, struct list_head *list = NULL; struct perf_pmu *pmu = NULL; YYLTYPE *loc = loc_; - int ok = 0; - const char *config; + int ok = 0, core_ok = 0; + const char *tmp; struct parse_events_terms parsed_terms; *listp = NULL; @@ -1559,15 +1559,15 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, return ret; } - config = strdup(event_name); - if (!config) + tmp = strdup(event_name); + if (!tmp) goto out_err; if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER, - config, /*num=*/1, /*novalue=*/true, + tmp, /*num=*/1, /*novalue=*/true, loc, /*loc_val=*/NULL) < 0) { - zfree(&config); + zfree(&tmp); goto out_err; } list_add_tail(&term->list, &parsed_terms.terms); @@ -1598,6 +1598,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, pr_debug("%s -> %s/%s/\n", event_name, pmu->name, sb.buf); strbuf_release(&sb); ok++; + if (pmu->is_core) + core_ok++; } } @@ -1614,6 +1616,18 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, } } + if (hw_config != PERF_COUNT_HW_MAX && !core_ok) { + /* + * The event wasn't found on core PMUs but it has a hardware + * config version to try. + */ + if (!parse_events_add_numeric(parse_state, list, + PERF_TYPE_HARDWARE, hw_config, + const_parsed_terms, + /*wildcard=*/true)) + ok++; + } + out_err: parse_events_terms__exit(&parsed_terms); if (ok) diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index bf7f73548605..29082a22ccc9 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -113,12 +113,12 @@ do { \ yyless(0); \ } while (0) -static int sym(yyscan_t scanner, int type, int config) +static int sym(yyscan_t scanner, int config) { YYSTYPE *yylval = parse_events_get_lval(scanner); - yylval->num = (type << 16) + config; - return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; + yylval->num = config; + return PE_VALUE_SYM_SW; } static int term(yyscan_t scanner, enum parse_events__term_type type) @@ -129,13 +129,13 @@ static int term(yyscan_t scanner, enum parse_events__term_type type) return PE_TERM; } -static int hw_term(yyscan_t scanner, int config) +static int hw(yyscan_t scanner, int config) { YYSTYPE *yylval = parse_events_get_lval(scanner); char *text = parse_events_get_text(scanner); - yylval->hardware_term.str = strdup(text); - yylval->hardware_term.num = PERF_TYPE_HARDWARE + config; + yylval->hardware_event.str = strdup(text); + yylval->hardware_event.num = config; return PE_TERM_HW; } @@ -324,16 +324,16 @@ aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } aux-action { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_ACTION); } aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); } metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); } -cpu-cycles|cycles { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); } -stalled-cycles-frontend|idle-cycles-frontend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } -stalled-cycles-backend|idle-cycles-backend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } -instructions { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); } -cache-references { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); } -cache-misses { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); } -branch-instructions|branches { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } -branch-misses { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); } -bus-cycles { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); } -ref-cycles { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); } +cpu-cycles|cycles { return hw(yyscanner, PERF_COUNT_HW_CPU_CYCLES); } +stalled-cycles-frontend|idle-cycles-frontend { return hw(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } +stalled-cycles-backend|idle-cycles-backend { return hw(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } +instructions { return hw(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); } +cache-references { return hw(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); } +cache-misses { return hw(yyscanner, PERF_COUNT_HW_CACHE_MISSES); } +branch-instructions|branches { return hw(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } +branch-misses { return hw(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); } +bus-cycles { return hw(yyscanner, PERF_COUNT_HW_BUS_CYCLES); } +ref-cycles { return hw(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); } r{num_raw_hex} { return str(yyscanner, PE_RAW); } r0x{num_raw_hex} { return str(yyscanner, PE_RAW); } , { return ','; } @@ -377,28 +377,28 @@ r0x{num_raw_hex} { return str(yyscanner, PE_RAW); } <> { BEGIN(INITIAL); } } -cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } -stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } -stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } -instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } -cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } -cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } -branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } -branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } -bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } -ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } -cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } -task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } -page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } -minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } -major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } -context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } -cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } -alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } -emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } -dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } -bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } -cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); } +cpu-cycles|cycles { return hw(yyscanner, PERF_COUNT_HW_CPU_CYCLES); } +stalled-cycles-frontend|idle-cycles-frontend { return hw(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } +stalled-cycles-backend|idle-cycles-backend { return hw(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } +instructions { return hw(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); } +cache-references { return hw(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); } +cache-misses { return hw(yyscanner, PERF_COUNT_HW_CACHE_MISSES); } +branch-instructions|branches { return hw(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } +branch-misses { return hw(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); } +bus-cycles { return hw(yyscanner, PERF_COUNT_HW_BUS_CYCLES); } +ref-cycles { return hw(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); } +cpu-clock { return sym(yyscanner, PERF_COUNT_SW_CPU_CLOCK); } +task-clock { return sym(yyscanner, PERF_COUNT_SW_TASK_CLOCK); } +page-faults|faults { return sym(yyscanner, PERF_COUNT_SW_PAGE_FAULTS); } +minor-faults { return sym(yyscanner, PERF_COUNT_SW_PAGE_FAULTS_MIN); } +major-faults { return sym(yyscanner, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } +context-switches|cs { return sym(yyscanner, PERF_COUNT_SW_CONTEXT_SWITCHES); } +cpu-migrations|migrations { return sym(yyscanner, PERF_COUNT_SW_CPU_MIGRATIONS); } +alignment-faults { return sym(yyscanner, PERF_COUNT_SW_ALIGNMENT_FAULTS); } +emulation-faults { return sym(yyscanner, PERF_COUNT_SW_EMULATION_FAULTS); } +dummy { return sym(yyscanner, PERF_COUNT_SW_DUMMY); } +bpf-output { return sym(yyscanner, PERF_COUNT_SW_BPF_OUTPUT); } +cgroup-switches { return sym(yyscanner, PERF_COUNT_SW_CGROUP_SWITCHES); } {lc_type} { return str(yyscanner, PE_LEGACY_CACHE); } {lc_type}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); } diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y index f888cbb076d6..d2ef1890007e 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -55,7 +55,7 @@ static void free_list_evsel(struct list_head* list_evsel) %} %token PE_START_EVENTS PE_START_TERMS -%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_TERM +%token PE_VALUE PE_VALUE_SYM_SW PE_TERM %token PE_EVENT_NAME %token PE_RAW PE_NAME %token PE_MODIFIER_EVENT PE_MODIFIER_BP PE_BP_COLON PE_BP_SLASH @@ -65,11 +65,9 @@ static void free_list_evsel(struct list_head* list_evsel) %token PE_DRV_CFG_TERM %token PE_TERM_HW %type PE_VALUE -%type PE_VALUE_SYM_HW %type PE_VALUE_SYM_SW %type PE_MODIFIER_EVENT %type PE_TERM -%type value_sym %type PE_RAW %type PE_NAME %type PE_LEGACY_CACHE @@ -85,6 +83,7 @@ static void free_list_evsel(struct list_head* list_evsel) %type opt_pmu_config %destructor { parse_events_terms__delete ($$); } %type event_pmu +%type event_legacy_hardware %type event_legacy_symbol %type event_legacy_cache %type event_legacy_mem @@ -102,8 +101,8 @@ static void free_list_evsel(struct list_head* list_evsel) %destructor { free_list_evsel ($$); } %type tracepoint_name %destructor { free ($$.sys); free ($$.event); } -%type PE_TERM_HW -%destructor { free ($$.str); } +%type PE_TERM_HW +%destructor { free ($$.str); } %union { @@ -118,10 +117,10 @@ static void free_list_evsel(struct list_head* list_evsel) char *sys; char *event; } tracepoint_name; - struct hardware_term { + struct hardware_event { char *str; u64 num; - } hardware_term; + } hardware_event; } %% @@ -264,6 +263,7 @@ PE_EVENT_NAME event_def event_def event_def: event_pmu | + event_legacy_hardware | event_legacy_symbol | event_legacy_cache sep_dc | event_legacy_mem sep_dc | @@ -306,24 +306,45 @@ PE_NAME sep_dc $$ = list; } -value_sym: -PE_VALUE_SYM_HW +event_legacy_hardware: +PE_TERM_HW opt_pmu_config +{ + /* List of created evsels. */ + struct list_head *list = NULL; + int err = parse_events_multi_pmu_add(_parse_state, $1.str, $1.num, $2, &list, &@1); + + free($1.str); + parse_events_terms__delete($2); + if (err) + PE_ABORT(err); + + $$ = list; +} | -PE_VALUE_SYM_SW +PE_TERM_HW sep_dc +{ + struct list_head *list; + int err; + + err = parse_events_multi_pmu_add(_parse_state, $1.str, $1.num, NULL, &list, &@1); + free($1.str); + if (err) + PE_ABORT(err); + $$ = list; +} event_legacy_symbol: -value_sym '/' event_config '/' +PE_VALUE_SYM_SW '/' event_config '/' { struct list_head *list; - int type = $1 >> 16; - int config = $1 & 255; int err; - bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE); list = alloc_list(); if (!list) YYNOMEM; - err = parse_events_add_numeric(_parse_state, list, type, config, $3, wildcard); + err = parse_events_add_numeric(_parse_state, list, + /*type=*/PERF_TYPE_SOFTWARE, /*config=*/$1, + $3, /*wildcard=*/false); parse_events_terms__delete($3); if (err) { free_list_evsel(list); @@ -332,18 +353,17 @@ value_sym '/' event_config '/' $$ = list; } | -value_sym sep_slash_slash_dc +PE_VALUE_SYM_SW sep_slash_slash_dc { struct list_head *list; - int type = $1 >> 16; - int config = $1 & 255; - bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE); int err; list = alloc_list(); if (!list) YYNOMEM; - err = parse_events_add_numeric(_parse_state, list, type, config, /*head_config=*/NULL, wildcard); + err = parse_events_add_numeric(_parse_state, list, + /*type=*/PERF_TYPE_SOFTWARE, /*config=*/$1, + /*head_config=*/NULL, /*wildcard=*/false); if (err) PE_ABORT(err); $$ = list;