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@xxxxxxxxxxxx/ 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 <irogers@xxxxxxxxxx> --- tools/perf/util/parse-events.c | 31 ++++++++++---- tools/perf/util/parse-events.h | 2 +- tools/perf/util/parse-events.l | 76 +++++++++++++++++----------------- tools/perf/util/parse-events.y | 62 +++++++++++++++++---------- 4 files changed, 103 insertions(+), 68 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 50c4012c737e..71b0c5d518f1 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1541,7 +1541,7 @@ static int parse_events_add_pmu(struct parse_events_state *parse_state, } int parse_events_multi_pmu_add(struct parse_events_state *parse_state, - const char *event_name, + const char *event_name, u64 hw_config, const struct parse_events_terms *const_parsed_terms, struct list_head **listp, void *loc_) { @@ -1549,8 +1549,8 @@ 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; @@ -1563,15 +1563,15 @@ 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); @@ -1602,6 +1602,8 @@ 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++; } } @@ -1618,6 +1620,18 @@ 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) @@ -1670,7 +1684,8 @@ int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state /* Failure to add, assume event_or_pmu is an event name. */ zfree(listp); - if (!parse_events_multi_pmu_add(parse_state, event_or_pmu, const_parsed_terms, listp, loc)) + if (!parse_events_multi_pmu_add(parse_state, event_or_pmu, PERF_COUNT_HW_MAX, + const_parsed_terms, listp, loc)) return 0; if (asprintf(&help, "Unable to find PMU or event on a PMU of '%s'", event_or_pmu) < 0) diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index 5005782766e9..7e5afad3feb8 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -215,7 +215,7 @@ struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr, struct perf_pmu *pmu); int parse_events_multi_pmu_add(struct parse_events_state *parse_state, - const char *event_name, + const char *event_name, u64 hw_config, const struct parse_events_terms *const_parsed_terms, struct list_head **listp, void *loc); diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index e86c45675e1d..6fe37003ab7b 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -100,12 +100,12 @@ 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 tool(yyscan_t scanner, enum perf_tool_event event) @@ -124,13 +124,13 @@ 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; } @@ -246,16 +246,16 @@ percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); } aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } 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 ','; } @@ -299,31 +299,31 @@ r0x{num_raw_hex} { return str(yyscanner, PE_RAW); } <<EOF>> { 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); } +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); } duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); } user_time { return tool(yyscanner, PERF_TOOL_USER_TIME); } system_time { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); } -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); } +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 bb9bee5c8a2b..ebac73786065 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_VALUE_SYM_TOOL %token PE_EVENT_NAME %token PE_RAW PE_NAME @@ -66,11 +66,9 @@ static void free_list_evsel(struct list_head* list_evsel) %token PE_DRV_CFG_TERM %token PE_TERM_HW %type <num> PE_VALUE -%type <num> PE_VALUE_SYM_HW %type <num> PE_VALUE_SYM_SW %type <num> PE_VALUE_SYM_TOOL %type <term_type> PE_TERM -%type <num> value_sym %type <str> PE_RAW %type <str> PE_NAME %type <str> PE_LEGACY_CACHE @@ -87,6 +85,7 @@ static void free_list_evsel(struct list_head* list_evsel) %type <list_terms> opt_pmu_config %destructor { parse_events_terms__delete ($$); } <list_terms> %type <list_evsel> event_pmu +%type <list_evsel> event_legacy_hardware %type <list_evsel> event_legacy_symbol %type <list_evsel> event_legacy_cache %type <list_evsel> event_legacy_mem @@ -104,8 +103,8 @@ static void free_list_evsel(struct list_head* list_evsel) %destructor { free_list_evsel ($$); } <list_evsel> %type <tracepoint_name> tracepoint_name %destructor { free ($$.sys); free ($$.event); } <tracepoint_name> -%type <hardware_term> PE_TERM_HW -%destructor { free ($$.str); } <hardware_term> +%type <hardware_event> PE_TERM_HW +%destructor { free ($$.str); } <hardware_event> %union { @@ -119,10 +118,10 @@ 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; } %% @@ -263,6 +262,7 @@ 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 | @@ -291,7 +291,7 @@ PE_NAME sep_dc struct list_head *list; int err; - err = parse_events_multi_pmu_add(_parse_state, $1, NULL, &list, &@1); + err = parse_events_multi_pmu_add(_parse_state, $1, PERF_COUNT_HW_MAX, NULL, &list, &@1); if (err < 0) { struct parse_events_state *parse_state = _parse_state; struct parse_events_error *error = parse_state->error; @@ -307,24 +307,45 @@ 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); + $$ = list; +} event_legacy_symbol: -value_sym '/' event_config '/' +PE_VALUE_SYM_SW '/' event_config '/' { struct list_head *list; - int type = $1 >> 16; - int config = $1 & 255; int err; - bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE); list = alloc_list(); if (!list) YYNOMEM; - err = parse_events_add_numeric(_parse_state, list, type, config, $3, wildcard); + err = parse_events_add_numeric(_parse_state, list, + /*type=*/PERF_TYPE_SOFTWARE, /*config=*/$1, + $3, /*wildcard=*/false); parse_events_terms__delete($3); if (err) { free_list_evsel(list); @@ -333,18 +354,17 @@ value_sym '/' event_config '/' $$ = 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; -- 2.44.0.683.g7961c838ac-goog
