1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/list.h>
3 #include <linux/compiler.h>
12 #include <api/fs/fs.h>
16 #include "parse-events.h"
19 #include "pmu-events/pmu-events.h"
23 struct perf_pmu_format {
26 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
27 struct list_head list;
30 #define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
32 int perf_pmu_parse(struct list_head *list, char *name);
33 extern FILE *perf_pmu_in;
35 static LIST_HEAD(pmus);
38 * Parse & process all the sysfs attributes located under
39 * the directory specified in 'dir' parameter.
41 int perf_pmu__format_parse(char *dir, struct list_head *head)
43 struct dirent *evt_ent;
47 format_dir = opendir(dir);
51 while (!ret && (evt_ent = readdir(format_dir))) {
53 char *name = evt_ent->d_name;
56 if (!strcmp(name, ".") || !strcmp(name, ".."))
59 snprintf(path, PATH_MAX, "%s/%s", dir, name);
62 file = fopen(path, "r");
67 ret = perf_pmu_parse(head, name);
76 * Reading/parsing the default pmu format definition, which should be
78 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
80 static int pmu_format(const char *name, struct list_head *format)
84 const char *sysfs = sysfs__mountpoint();
89 snprintf(path, PATH_MAX,
90 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
92 if (stat(path, &st) < 0)
93 return 0; /* no error if format does not exist */
95 if (perf_pmu__format_parse(path, format))
101 static int convert_scale(const char *scale, char **end, double *sval)
107 * save current locale
109 lc = setlocale(LC_NUMERIC, NULL);
112 * The lc string may be allocated in static storage,
113 * so get a dynamic copy to make it survive setlocale
123 * force to C locale to ensure kernel
124 * scale string is converted correctly.
125 * kernel uses default C locale.
127 setlocale(LC_NUMERIC, "C");
129 *sval = strtod(scale, end);
133 setlocale(LC_NUMERIC, lc);
138 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
146 snprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
148 fd = open(path, O_RDONLY);
152 if (fstat(fd, &st) < 0)
155 sret = read(fd, scale, sizeof(scale)-1);
159 if (scale[sret - 1] == '\n')
160 scale[sret - 1] = '\0';
164 ret = convert_scale(scale, NULL, &alias->scale);
170 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
176 snprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
178 fd = open(path, O_RDONLY);
182 sret = read(fd, alias->unit, UNIT_MAX_LEN);
188 if (alias->unit[sret - 1] == '\n')
189 alias->unit[sret - 1] = '\0';
191 alias->unit[sret] = '\0';
196 alias->unit[0] = '\0';
201 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
206 snprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
208 fd = open(path, O_RDONLY);
214 alias->per_pkg = true;
218 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
219 char *dir, char *name)
224 snprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
226 fd = open(path, O_RDONLY);
230 alias->snapshot = true;
235 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
236 char *desc, char *val,
237 char *long_desc, char *topic,
238 char *unit, char *perpkg,
242 struct perf_pmu_alias *alias;
246 alias = malloc(sizeof(*alias));
250 INIT_LIST_HEAD(&alias->terms);
252 alias->unit[0] = '\0';
253 alias->per_pkg = false;
254 alias->snapshot = false;
256 ret = parse_events_terms(&alias->terms, val);
258 pr_err("Cannot parse alias %s: %d\n", val, ret);
263 alias->name = strdup(name);
266 * load unit name and scale if available
268 perf_pmu__parse_unit(alias, dir, name);
269 perf_pmu__parse_scale(alias, dir, name);
270 perf_pmu__parse_per_pkg(alias, dir, name);
271 perf_pmu__parse_snapshot(alias, dir, name);
274 alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL;
275 alias->metric_name = metric_name ? strdup(metric_name): NULL;
276 alias->desc = desc ? strdup(desc) : NULL;
277 alias->long_desc = long_desc ? strdup(long_desc) :
278 desc ? strdup(desc) : NULL;
279 alias->topic = topic ? strdup(topic) : NULL;
281 if (convert_scale(unit, &unit, &alias->scale) < 0)
283 snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
285 alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
286 alias->str = strdup(val);
288 list_add_tail(&alias->list, list);
293 static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
298 ret = fread(buf, 1, sizeof(buf), file);
304 return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL,
308 static inline bool pmu_alias_info_file(char *name)
313 if (len > 5 && !strcmp(name + len - 5, ".unit"))
315 if (len > 6 && !strcmp(name + len - 6, ".scale"))
317 if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
319 if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
326 * Process all the sysfs attributes located under the directory
327 * specified in 'dir' parameter.
329 static int pmu_aliases_parse(char *dir, struct list_head *head)
331 struct dirent *evt_ent;
334 event_dir = opendir(dir);
338 while ((evt_ent = readdir(event_dir))) {
340 char *name = evt_ent->d_name;
343 if (!strcmp(name, ".") || !strcmp(name, ".."))
347 * skip info files parsed in perf_pmu__new_alias()
349 if (pmu_alias_info_file(name))
352 snprintf(path, PATH_MAX, "%s/%s", dir, name);
354 file = fopen(path, "r");
356 pr_debug("Cannot open %s\n", path);
360 if (perf_pmu__new_alias(head, dir, name, file) < 0)
361 pr_debug("Cannot set up %s\n", name);
370 * Reading the pmu event aliases definition, which should be located at:
371 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
373 static int pmu_aliases(const char *name, struct list_head *head)
377 const char *sysfs = sysfs__mountpoint();
382 snprintf(path, PATH_MAX,
383 "%s/bus/event_source/devices/%s/events", sysfs, name);
385 if (stat(path, &st) < 0)
386 return 0; /* no error if 'events' does not exist */
388 if (pmu_aliases_parse(path, head))
394 static int pmu_alias_terms(struct perf_pmu_alias *alias,
395 struct list_head *terms)
397 struct parse_events_term *term, *cloned;
401 list_for_each_entry(term, &alias->terms, list) {
402 ret = parse_events_term__clone(&cloned, term);
404 parse_events_terms__purge(&list);
407 list_add_tail(&cloned->list, &list);
409 list_splice(&list, terms);
414 * Reading/parsing the default pmu type value, which should be
416 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
418 static int pmu_type(const char *name, __u32 *type)
424 const char *sysfs = sysfs__mountpoint();
429 snprintf(path, PATH_MAX,
430 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
432 if (stat(path, &st) < 0)
435 file = fopen(path, "r");
439 if (1 != fscanf(file, "%u", type))
446 /* Add all pmus in sysfs to pmu list: */
447 static void pmu_read_sysfs(void)
452 const char *sysfs = sysfs__mountpoint();
457 snprintf(path, PATH_MAX,
458 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
464 while ((dent = readdir(dir))) {
465 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
467 /* add to static LIST_HEAD(pmus): */
468 perf_pmu__find(dent->d_name);
474 static struct cpu_map *__pmu_cpumask(const char *path)
477 struct cpu_map *cpus;
479 file = fopen(path, "r");
483 cpus = cpu_map__read(file);
489 * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
490 * may have a "cpus" file.
492 #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask"
493 #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus"
495 static struct cpu_map *pmu_cpumask(const char *name)
498 struct cpu_map *cpus;
499 const char *sysfs = sysfs__mountpoint();
500 const char *templates[] = {
501 CPUS_TEMPLATE_UNCORE,
505 const char **template;
510 for (template = templates; *template; template++) {
511 snprintf(path, PATH_MAX, *template, sysfs, name);
512 cpus = __pmu_cpumask(path);
520 static bool pmu_is_uncore(const char *name)
523 struct cpu_map *cpus;
524 const char *sysfs = sysfs__mountpoint();
526 snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
527 cpus = __pmu_cpumask(path);
534 * Return the CPU id as a raw string.
536 * Each architecture should provide a more precise id string that
537 * can be use to match the architecture's "mapfile".
539 char * __weak get_cpuid_str(void)
545 * From the pmu_events_map, find the table of PMU events that corresponds
546 * to the current running CPU. Then, add all PMU events from that table
549 static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
552 struct pmu_events_map *map;
553 struct pmu_event *pe;
557 cpuid = getenv("PERF_CPUID");
559 cpuid = strdup(cpuid);
561 cpuid = get_cpuid_str();
566 pr_debug("Using CPUID %s\n", cpuid);
572 map = &pmu_events_map[i++];
576 if (!strcmp(map->cpuid, cpuid))
581 * Found a matching PMU events table. Create aliases
587 pe = &map->table[i++];
591 pname = pe->pmu ? pe->pmu : "cpu";
592 if (strncmp(pname, name, strlen(pname)))
595 /* need type casts to override 'const' */
596 __perf_pmu__new_alias(head, NULL, (char *)pe->name,
597 (char *)pe->desc, (char *)pe->event,
598 (char *)pe->long_desc, (char *)pe->topic,
599 (char *)pe->unit, (char *)pe->perpkg,
600 (char *)pe->metric_expr,
601 (char *)pe->metric_name);
608 struct perf_event_attr * __weak
609 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
614 static struct perf_pmu *pmu_lookup(const char *name)
616 struct perf_pmu *pmu;
622 * The pmu data we store & need consists of the pmu
623 * type value and format definitions. Load both right
626 if (pmu_format(name, &format))
630 * Check the type first to avoid unnecessary work.
632 if (pmu_type(name, &type))
635 if (pmu_aliases(name, &aliases))
638 pmu_add_cpu_aliases(&aliases, name);
639 pmu = zalloc(sizeof(*pmu));
643 pmu->cpus = pmu_cpumask(name);
645 pmu->is_uncore = pmu_is_uncore(name);
647 INIT_LIST_HEAD(&pmu->format);
648 INIT_LIST_HEAD(&pmu->aliases);
649 list_splice(&format, &pmu->format);
650 list_splice(&aliases, &pmu->aliases);
651 pmu->name = strdup(name);
653 list_add_tail(&pmu->list, &pmus);
655 pmu->default_config = perf_pmu__get_default_config(pmu);
660 static struct perf_pmu *pmu_find(const char *name)
662 struct perf_pmu *pmu;
664 list_for_each_entry(pmu, &pmus, list)
665 if (!strcmp(pmu->name, name))
671 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
674 * pmu iterator: If pmu is NULL, we start at the begin,
675 * otherwise return the next pmu. Returns NULL on end.
679 pmu = list_prepare_entry(pmu, &pmus, list);
681 list_for_each_entry_continue(pmu, &pmus, list)
686 struct perf_pmu *perf_pmu__find(const char *name)
688 struct perf_pmu *pmu;
691 * Once PMU is loaded it stays in the list,
692 * so we keep us from multiple reading/parsing
693 * the pmu format definitions.
695 pmu = pmu_find(name);
699 return pmu_lookup(name);
702 static struct perf_pmu_format *
703 pmu_find_format(struct list_head *formats, const char *name)
705 struct perf_pmu_format *format;
707 list_for_each_entry(format, formats, list)
708 if (!strcmp(format->name, name))
714 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
716 struct perf_pmu_format *format = pmu_find_format(formats, name);
723 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
724 bits |= 1ULL << fbit;
730 * Sets value based on the format definition (format parameter)
731 * and unformated value (value parameter).
733 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
736 unsigned long fbit, vbit;
738 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
740 if (!test_bit(fbit, format))
743 if (value & (1llu << vbit++))
744 *v |= (1llu << fbit);
746 *v &= ~(1llu << fbit);
750 static __u64 pmu_format_max_value(const unsigned long *format)
755 for_each_set_bit(fbit, format, PERF_PMU_FORMAT_BITS)
762 * Term is a string term, and might be a param-term. Try to look up it's value
763 * in the remaining terms.
764 * - We have a term like "base-or-format-term=param-term",
765 * - We need to find the value supplied for "param-term" (with param-term named
766 * in a config string) later on in the term list.
768 static int pmu_resolve_param_term(struct parse_events_term *term,
769 struct list_head *head_terms,
772 struct parse_events_term *t;
774 list_for_each_entry(t, head_terms, list) {
775 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
776 if (!strcmp(t->config, term->config)) {
785 printf("Required parameter '%s' not specified\n", term->config);
790 static char *pmu_formats_string(struct list_head *formats)
792 struct perf_pmu_format *format;
794 struct strbuf buf = STRBUF_INIT;
800 /* sysfs exported terms */
801 list_for_each_entry(format, formats, list)
802 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
805 str = strbuf_detach(&buf, NULL);
807 strbuf_release(&buf);
813 * Setup one of config[12] attr members based on the
814 * user input data - term parameter.
816 static int pmu_config_term(struct list_head *formats,
817 struct perf_event_attr *attr,
818 struct parse_events_term *term,
819 struct list_head *head_terms,
820 bool zero, struct parse_events_error *err)
822 struct perf_pmu_format *format;
827 * If this is a parameter we've already used for parameterized-eval,
828 * skip it in normal eval.
834 * Hardcoded terms should be already in, so nothing
835 * to be done for them.
837 if (parse_events__is_hardcoded_term(term))
840 format = pmu_find_format(formats, term->config);
843 printf("Invalid event/parameter '%s'\n", term->config);
845 char *pmu_term = pmu_formats_string(formats);
847 err->idx = term->err_term;
848 err->str = strdup("unknown term");
849 err->help = parse_events_formats_error_string(pmu_term);
855 switch (format->value) {
856 case PERF_PMU_FORMAT_VALUE_CONFIG:
859 case PERF_PMU_FORMAT_VALUE_CONFIG1:
862 case PERF_PMU_FORMAT_VALUE_CONFIG2:
870 * Either directly use a numeric term, or try to translate string terms
871 * using event parameters.
873 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
874 if (term->no_value &&
875 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
877 err->idx = term->err_val;
878 err->str = strdup("no value assigned for term");
884 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
885 if (strcmp(term->val.str, "?")) {
887 pr_info("Invalid sysfs entry %s=%s\n",
888 term->config, term->val.str);
891 err->idx = term->err_val;
892 err->str = strdup("expected numeric value");
897 if (pmu_resolve_param_term(term, head_terms, &val))
902 max_val = pmu_format_max_value(format->bits);
905 err->idx = term->err_val;
906 if (asprintf(&err->str,
907 "value too big for format, maximum is %llu",
908 (unsigned long long)max_val) < 0)
909 err->str = strdup("value too big for format");
913 * Assume we don't care if !err, in which case the value will be
914 * silently truncated.
918 pmu_format_value(format->bits, val, vp, zero);
922 int perf_pmu__config_terms(struct list_head *formats,
923 struct perf_event_attr *attr,
924 struct list_head *head_terms,
925 bool zero, struct parse_events_error *err)
927 struct parse_events_term *term;
929 list_for_each_entry(term, head_terms, list) {
930 if (pmu_config_term(formats, attr, term, head_terms,
939 * Configures event's 'attr' parameter based on the:
940 * 1) users input - specified in terms parameter
941 * 2) pmu format definitions - specified by pmu parameter
943 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
944 struct list_head *head_terms,
945 struct parse_events_error *err)
947 bool zero = !!pmu->default_config;
949 attr->type = pmu->type;
950 return perf_pmu__config_terms(&pmu->format, attr, head_terms,
954 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
955 struct parse_events_term *term)
957 struct perf_pmu_alias *alias;
960 if (parse_events__is_hardcoded_term(term))
963 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
964 if (term->val.num != 1)
966 if (pmu_find_format(&pmu->format, term->config))
969 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
970 if (strcasecmp(term->config, "event"))
972 name = term->val.str;
977 list_for_each_entry(alias, &pmu->aliases, list) {
978 if (!strcasecmp(alias->name, name))
985 static int check_info_data(struct perf_pmu_alias *alias,
986 struct perf_pmu_info *info)
989 * Only one term in event definition can
990 * define unit, scale and snapshot, fail
991 * if there's more than one.
993 if ((info->unit && alias->unit[0]) ||
994 (info->scale && alias->scale) ||
995 (info->snapshot && alias->snapshot))
999 info->unit = alias->unit;
1002 info->scale = alias->scale;
1004 if (alias->snapshot)
1005 info->snapshot = alias->snapshot;
1011 * Find alias in the terms list and replace it with the terms
1012 * defined for the alias
1014 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
1015 struct perf_pmu_info *info)
1017 struct parse_events_term *term, *h;
1018 struct perf_pmu_alias *alias;
1021 info->per_pkg = false;
1024 * Mark unit and scale as not set
1025 * (different from default values, see below)
1029 info->snapshot = false;
1030 info->metric_expr = NULL;
1031 info->metric_name = NULL;
1033 list_for_each_entry_safe(term, h, head_terms, list) {
1034 alias = pmu_find_alias(pmu, term);
1037 ret = pmu_alias_terms(alias, &term->list);
1041 ret = check_info_data(alias, info);
1046 info->per_pkg = true;
1047 info->metric_expr = alias->metric_expr;
1048 info->metric_name = alias->metric_name;
1050 list_del(&term->list);
1055 * if no unit or scale foundin aliases, then
1056 * set defaults as for evsel
1057 * unit cannot left to NULL
1059 if (info->unit == NULL)
1062 if (info->scale == 0.0)
1068 int perf_pmu__new_format(struct list_head *list, char *name,
1069 int config, unsigned long *bits)
1071 struct perf_pmu_format *format;
1073 format = zalloc(sizeof(*format));
1077 format->name = strdup(name);
1078 format->value = config;
1079 memcpy(format->bits, bits, sizeof(format->bits));
1081 list_add_tail(&format->list, list);
1085 void perf_pmu__set_format(unsigned long *bits, long from, long to)
1092 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
1093 for (b = from; b <= to; b++)
1097 static int sub_non_neg(int a, int b)
1104 static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
1105 struct perf_pmu_alias *alias)
1107 struct parse_events_term *term;
1108 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
1110 list_for_each_entry(term, &alias->terms, list) {
1111 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
1112 used += snprintf(buf + used, sub_non_neg(len, used),
1113 ",%s=%s", term->config,
1117 if (sub_non_neg(len, used) > 0) {
1121 if (sub_non_neg(len, used) > 0) {
1125 buf[len - 1] = '\0';
1130 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
1131 struct perf_pmu_alias *alias)
1133 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
1147 static int cmp_sevent(const void *a, const void *b)
1149 const struct sevent *as = a;
1150 const struct sevent *bs = b;
1152 /* Put extra events last */
1153 if (!!as->desc != !!bs->desc)
1154 return !!as->desc - !!bs->desc;
1155 if (as->topic && bs->topic) {
1156 int n = strcmp(as->topic, bs->topic);
1161 return strcmp(as->name, bs->name);
1164 static void wordwrap(char *s, int start, int max, int corr)
1170 int wlen = strcspn(s, " \t");
1172 if (column + wlen >= max && column > start) {
1173 printf("\n%*s", start, "");
1174 column = start + corr;
1176 n = printf("%s%.*s", column > start ? " " : "", wlen, s);
1185 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
1186 bool long_desc, bool details_flag)
1188 struct perf_pmu *pmu;
1189 struct perf_pmu_alias *alias;
1193 struct sevent *aliases;
1195 int columns = pager_get_columns();
1200 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1201 list_for_each_entry(alias, &pmu->aliases, list)
1203 if (pmu->selectable)
1206 aliases = zalloc(sizeof(struct sevent) * len);
1211 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1212 list_for_each_entry(alias, &pmu->aliases, list) {
1213 char *name = alias->desc ? alias->name :
1214 format_alias(buf, sizeof(buf), pmu, alias);
1215 bool is_cpu = !strcmp(pmu->name, "cpu");
1217 if (event_glob != NULL &&
1218 !(strglobmatch_nocase(name, event_glob) ||
1219 (!is_cpu && strglobmatch_nocase(alias->name,
1222 strglobmatch_nocase(alias->topic, event_glob))))
1225 if (is_cpu && !name_only && !alias->desc)
1226 name = format_alias_or(buf, sizeof(buf), pmu, alias);
1228 aliases[j].name = name;
1229 if (is_cpu && !name_only && !alias->desc)
1230 aliases[j].name = format_alias_or(buf,
1233 aliases[j].name = strdup(aliases[j].name);
1234 if (!aliases[j].name)
1237 aliases[j].desc = long_desc ? alias->long_desc :
1239 aliases[j].topic = alias->topic;
1240 aliases[j].str = alias->str;
1241 aliases[j].pmu = pmu->name;
1242 aliases[j].metric_expr = alias->metric_expr;
1243 aliases[j].metric_name = alias->metric_name;
1246 if (pmu->selectable &&
1247 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
1249 if (asprintf(&s, "%s//", pmu->name) < 0)
1251 aliases[j].name = s;
1256 qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
1257 for (j = 0; j < len; j++) {
1258 /* Skip duplicates */
1259 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name))
1262 printf("%s ", aliases[j].name);
1265 if (aliases[j].desc && !quiet_flag) {
1268 if (aliases[j].topic && (!topic ||
1269 strcmp(topic, aliases[j].topic))) {
1270 printf("%s%s:\n", topic ? "\n" : "",
1272 topic = aliases[j].topic;
1274 printf(" %-50s\n", aliases[j].name);
1275 printf("%*s", 8, "[");
1276 wordwrap(aliases[j].desc, 8, columns, 0);
1279 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str);
1280 if (aliases[j].metric_name)
1281 printf(" MetricName: %s", aliases[j].metric_name);
1282 if (aliases[j].metric_expr)
1283 printf(" MetricExpr: %s", aliases[j].metric_expr);
1287 printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
1290 if (printed && pager_in_use())
1293 for (j = 0; j < len; j++)
1294 zfree(&aliases[j].name);
1299 printf("FATAL: not enough memory to print PMU events\n");
1304 bool pmu_have_event(const char *pname, const char *name)
1306 struct perf_pmu *pmu;
1307 struct perf_pmu_alias *alias;
1310 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1311 if (strcmp(pname, pmu->name))
1313 list_for_each_entry(alias, &pmu->aliases, list)
1314 if (!strcmp(alias->name, name))
1320 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
1323 char path[PATH_MAX];
1326 sysfs = sysfs__mountpoint();
1330 snprintf(path, PATH_MAX,
1331 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
1333 if (stat(path, &st) < 0)
1336 return fopen(path, "r");
1339 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
1346 va_start(args, fmt);
1347 file = perf_pmu__open_file(pmu, name);
1349 ret = vfscanf(file, fmt, args);