diff options
| -rw-r--r-- | tools/perf/util/parse-events.c | 117 | ||||
| -rw-r--r-- | tools/perf/util/parse-events.h | 14 | ||||
| -rw-r--r-- | tools/perf/util/pmu.c | 10 | ||||
| -rw-r--r-- | tools/perf/util/pmu.h | 10 |
4 files changed, 141 insertions, 10 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index c5642e6748b2..c659a3ca1283 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -30,6 +30,15 @@ extern int parse_events_debug; #endif int parse_events_parse(void *data, void *scanner); +static struct perf_pmu_event_symbol *perf_pmu_events_list; +/* + * The variable indicates the number of supported pmu event symbols. + * 0 means not initialized and ready to init + * -1 means failed to init, don't try anymore + * >0 is the number of supported pmu event symbols + */ +static int perf_pmu_events_list_num; + static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { [PERF_COUNT_HW_CPU_CYCLES] = { .symbol = "cpu-cycles", @@ -863,6 +872,113 @@ int parse_events_name(struct list_head *list, char *name) return 0; } +static int +comp_pmu(const void *p1, const void *p2) +{ + struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; + struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; + + return strcmp(pmu1->symbol, pmu2->symbol); +} + +static void perf_pmu__parse_cleanup(void) +{ + if (perf_pmu_events_list_num > 0) { + struct perf_pmu_event_symbol *p; + int i; + + for (i = 0; i < perf_pmu_events_list_num; i++) { + p = perf_pmu_events_list + i; + free(p->symbol); + } + free(perf_pmu_events_list); + perf_pmu_events_list = NULL; + perf_pmu_events_list_num = 0; + } +} + +#define SET_SYMBOL(str, stype) \ +do { \ + p->symbol = str; \ + if (!p->symbol) \ + goto err; \ + p->type = stype; \ +} while (0) + +/* + * Read the pmu events list from sysfs + * Save it into perf_pmu_events_list + */ +static void perf_pmu__parse_init(void) +{ + + struct perf_pmu *pmu = NULL; + struct perf_pmu_alias *alias; + int len = 0; + + pmu = perf_pmu__find("cpu"); + if ((pmu == NULL) || list_empty(&pmu->aliases)) { + perf_pmu_events_list_num = -1; + return; + } + list_for_each_entry(alias, &pmu->aliases, list) { + if (strchr(alias->name, '-')) + len++; + len++; + } + perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); + if (!perf_pmu_events_list) + return; + perf_pmu_events_list_num = len; + + len = 0; + list_for_each_entry(alias, &pmu->aliases, list) { + struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; + char *tmp = strchr(alias->name, '-'); + + if (tmp != NULL) { + SET_SYMBOL(strndup(alias->name, tmp - alias->name), + PMU_EVENT_SYMBOL_PREFIX); + p++; + SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); + len += 2; + } else { + SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); + len++; + } + } + qsort(perf_pmu_events_list, len, + sizeof(struct perf_pmu_event_symbol), comp_pmu); + + return; +err: + perf_pmu__parse_cleanup(); +} + +enum perf_pmu_event_symbol_type +perf_pmu__parse_check(const char *name) +{ + struct perf_pmu_event_symbol p, *r; + + /* scan kernel pmu events from sysfs if needed */ + if (perf_pmu_events_list_num == 0) + perf_pmu__parse_init(); + /* + * name "cpu" could be prefix of cpu-cycles or cpu// events. + * cpu-cycles has been handled by hardcode. + * So it must be cpu// events, not kernel pmu event. + */ + if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) + return PMU_EVENT_SYMBOL_ERR; + + p.symbol = strdup(name); + r = bsearch(&p, perf_pmu_events_list, + (size_t) perf_pmu_events_list_num, + sizeof(struct perf_pmu_event_symbol), comp_pmu); + free(p.symbol); + return r ? r->type : PMU_EVENT_SYMBOL_ERR; +} + static int parse_events__scanner(const char *str, void *data, int start_token) { YY_BUFFER_STATE buffer; @@ -917,6 +1033,7 @@ int parse_events(struct perf_evlist *evlist, const char *str) int ret; ret = parse_events__scanner(str, &data, PE_START_EVENTS); + perf_pmu__parse_cleanup(); if (!ret) { int entries = data.idx - evlist->nr_entries; perf_evlist__splice_list_tail(evlist, &data.list, entries); diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index df094b4ed5ed..db2cf78ff0f3 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -35,6 +35,18 @@ extern int parse_filter(const struct option *opt, const char *str, int unset); #define EVENTS_HELP_MAX (128*1024) +enum perf_pmu_event_symbol_type { + PMU_EVENT_SYMBOL_ERR, /* not a PMU EVENT */ + PMU_EVENT_SYMBOL, /* normal style PMU event */ + PMU_EVENT_SYMBOL_PREFIX, /* prefix of pre-suf style event */ + PMU_EVENT_SYMBOL_SUFFIX, /* suffix of pre-suf style event */ +}; + +struct perf_pmu_event_symbol { + char *symbol; + enum perf_pmu_event_symbol_type type; +}; + enum { PARSE_EVENTS__TERM_TYPE_NUM, PARSE_EVENTS__TERM_TYPE_STR, @@ -95,6 +107,8 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx, void *ptr, char *type); int parse_events_add_pmu(struct list_head *list, int *idx, char *pmu , struct list_head *head_config); +enum perf_pmu_event_symbol_type +perf_pmu__parse_check(const char *name); void parse_events__set_leader(char *name, struct list_head *list); void parse_events_update_lists(struct list_head *list_event, struct list_head *list_all); diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 93a41ca96b8e..e243ad962a4d 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -12,16 +12,6 @@ #include "parse-events.h" #include "cpumap.h" -#define UNIT_MAX_LEN 31 /* max length for event unit name */ - -struct perf_pmu_alias { - char *name; - struct list_head terms; /* HEAD struct parse_events_term -> list */ - struct list_head list; /* ELEM */ - char unit[UNIT_MAX_LEN+1]; - double scale; -}; - struct perf_pmu_format { char *name; int value; diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index fe90a012c003..fe9dfbee8eed 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -30,6 +30,16 @@ struct perf_pmu_info { double scale; }; +#define UNIT_MAX_LEN 31 /* max length for event unit name */ + +struct perf_pmu_alias { + char *name; + struct list_head terms; /* HEAD struct parse_events_term -> list */ + struct list_head list; /* ELEM */ + char unit[UNIT_MAX_LEN+1]; + double scale; +}; + struct perf_pmu *perf_pmu__find(const char *name); int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, struct list_head *head_terms); |