// SPDX-License-Identifier: GPL-2.0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "util.h" #include "pmu.h" #include "parse-events.h" #include "cpumap.h" #include "header.h" #include "pmu-events/pmu-events.h" #include "cache.h" #include "string2.h" struct perf_pmu_format { char *name; int value; DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS); struct list_head list; }; int perf_pmu_parse(struct list_head *list, char *name); extern FILE *perf_pmu_in; static LIST_HEAD(pmus); /* * Parse & process all the sysfs attributes located under * the directory specified in 'dir' parameter. */ int perf_pmu__format_parse(char *dir, struct list_head *head) { struct dirent *evt_ent; DIR *format_dir; int ret = 0; format_dir = opendir(dir); if (!format_dir) return -EINVAL; while (!ret && (evt_ent = readdir(format_dir))) { char path[PATH_MAX]; char *name = evt_ent->d_name; FILE *file; if (!strcmp(name, ".") || !strcmp(name, "..")) continue; snprintf(path, PATH_MAX, "%s/%s", dir, name); ret = -EINVAL; file = fopen(path, "r"); if (!file) break; perf_pmu_in = file; ret = perf_pmu_parse(head, name); fclose(file); } closedir(format_dir); return ret; } /* * Reading/parsing the default pmu format definition, which should be * located at: * /sys/bus/event_source/devices//format as sysfs group attributes. */ static int pmu_format(const char *name, struct list_head *format) { struct stat st; char path[PATH_MAX]; const char *sysfs = sysfs__mountpoint(); if (!sysfs) return -1; snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name); if (stat(path, &st) < 0) return 0; /* no error if format does not exist */ if (perf_pmu__format_parse(path, format)) return -1; return 0; } static int convert_scale(const char *scale, char **end, double *sval) { char *lc; int ret = 0; /* * save current locale */ lc = setlocale(LC_NUMERIC, NULL); /* * The lc string may be allocated in static storage, * so get a dynamic copy to make it survive setlocale * call below. */ lc = strdup(lc); if (!lc) { ret = -ENOMEM; goto out; } /* * force to C locale to ensure kernel * scale string is converted correctly. * kernel uses default C locale. */ setlocale(LC_NUMERIC, "C"); *sval = strtod(scale, end); out: /* restore locale */ setlocale(LC_NUMERIC, lc); free(lc); return ret; } static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) { struct stat st; ssize_t sret; char scale[128]; int fd, ret = -1; char path[PATH_MAX]; scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name); fd = open(path, O_RDONLY); if (fd == -1) return -1; if (fstat(fd, &st) < 0) goto error; sret = read(fd, scale, sizeof(scale)-1); if (sret < 0) goto error; if (scale[sret - 1] == '\n') scale[sret - 1] = '\0'; else scale[sret] = '\0'; ret = convert_scale(scale, NULL, &alias->scale); error: close(fd); return ret; } static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name) { char path[PATH_MAX]; ssize_t sret; int fd; scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name); fd = open(path, O_RDONLY); if (fd == -1) return -1; sret = read(fd, alias->unit, UNIT_MAX_LEN); if (sret < 0) goto error; close(fd); if (alias->unit[sret - 1] == '\n') alias->unit[sret - 1] = '\0'; else alias->unit[sret] = '\0'; return 0; error: close(fd); alias->unit[0] = '\0'; return -1; } static int perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name) { char path[PATH_MAX]; int fd; scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name); fd = open(path, O_RDONLY); if (fd == -1) return -1; close(fd); alias->per_pkg = true; return 0; } static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, char *dir, char *name) { char path[PATH_MAX]; int fd; scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name); fd = open(path, O_RDONLY); if (fd == -1) return -1; alias->snapshot = true; close(fd); return 0; } static void perf_pmu_assign_str(char *name, const char *field, char **old_str, char **new_str) { if (!*old_str) goto set_new; if (*new_str) { /* Have new string, check with old */ if (strcasecmp(*old_str, *new_str)) pr_debug("alias %s differs in field '%s'\n", name, field); zfree(old_str); } else /* Nothing new --> keep old string */ return; set_new: *old_str = *new_str; *new_str = NULL; } static void perf_pmu_update_alias(struct perf_pmu_alias *old, struct perf_pmu_alias *newalias) { perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc); perf_pmu_assign_str(old->name, "long_desc", &old->long_desc, &newalias->long_desc); perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic); perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr, &newalias->metric_expr); perf_pmu_assign_str(old->name, "metric_name", &old->metric_name, &newalias->metric_name); perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str); old->scale = newalias->scale; old->per_pkg = newalias->per_pkg; old->snapshot = newalias->snapshot; memcpy(old->unit, newalias->unit, sizeof(old->unit)); } /* Delete an alias entry. */ static void perf_pmu_free_alias(struct perf_pmu_alias *newalias) { zfree(&newalias->name); zfree(&newalias->desc); zfree(&newalias->long_desc); zfree(&newalias->topic); zfree(&newalias->str); zfree(&newalias->metric_expr); zfree(&newalias->metric_name); parse_events_terms__purge(&newalias->terms); free(newalias); } /* Merge an alias, search in alias list. If this name is already * present merge both of them to combine all information. */ static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias, struct list_head *alist) { struct perf_pmu_alias *a; list_for_each_entry(a, alist, list) { if (!strcasecmp(newalias->name, a->name)) { perf_pmu_update_alias(a, newalias); perf_pmu_free_alias(newalias); return true; } } return false; } static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, char *desc, char *val, char *long_desc, char *topic, char *unit, char *perpkg, char *metric_expr, char *metric_name) { struct parse_events_term *term; struct perf_pmu_alias *alias; int ret; int num; char newval[256]; alias = malloc(sizeof(*alias)); if (!alias) return -ENOMEM; INIT_LIST_HEAD(&alias->terms); alias->scale = 1.0; alias->unit[0] = '\0'; alias->per_pkg = false; alias->snapshot = false; ret = parse_events_terms(&alias->terms, val); if (ret) { pr_err("Cannot parse alias %s: %d\n", val, ret); free(alias); return ret; } /* Scan event and remove leading zeroes, spaces, newlines, some * platforms have terms specified as * event=0x0091 (read from files ..//events/ * and terms specified as event=0x91 (read from JSON files). * * Rebuild string to make alias->str member comparable. */ memset(newval, 0, sizeof(newval)); ret = 0; list_for_each_entry(term, &alias->terms, list) { if (ret) ret += scnprintf(newval + ret, sizeof(newval) - ret, ","); if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) ret += scnprintf(newval + ret, sizeof(newval) - ret, "%s=%#x", term->config, term->val.num); else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) ret += scnprintf(newval + ret, sizeof(newval) - ret, "%s=%s", term->config, term->val.str); } alias->name = strdup(name); if (dir) { /* * load unit name and scale if available */ perf_pmu__parse_unit(alias, dir, name); perf_pmu__parse_scale(alias, dir, name); perf_pmu__parse_per_pkg(alias, dir, name); perf_pmu__parse_snapshot(alias, dir, name); } alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL; alias->metric_name = metric_name ? strdup(metric_name): NULL; alias->desc = desc ? strdup(desc) : NULL; alias->long_desc = long_desc ? strdup(long_desc) : desc ? strdup(desc) : NULL; alias->topic = topic ? strdup(topic) : NULL; if (unit) { if (convert_scale(unit, &unit, &alias->scale) < 0) return -1; snprintf(alias->unit, sizeof(alias->unit), "%s", unit); } alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1; alias->str = strdup(newval); if (!perf_pmu_merge_alias(alias, list)) list_add_tail(&alias->list, list); return 0; } static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file) { char buf[256]; int ret; ret = fread(buf, 1, sizeof(buf), file); if (ret == 0) return -EINVAL; buf[ret] = 0; /* Remove trailing newline from sysfs file */ strim(buf); return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL, NULL, NULL, NULL); } static inline bool pmu_alias_info_file(char *name) { size_t len; len = strlen(name); if (len > 5 && !strcmp(name + len - 5, ".unit")) return true; if (len > 6 && !strcmp(name + len - 6, ".scale")) return true; if (len > 8 && !strcmp(name + len - 8, ".per-pkg")) return true; if (len > 9 && !strcmp(name + len - 9, ".snapshot")) return true; return false; } /* * Process all the sysfs attributes located under the directory * specified in 'dir' parameter. */ static int pmu_aliases_parse(char *dir, struct list_head *head) { struct dirent *evt_ent; DIR *event_dir; event_dir = opendir(dir); if (!event_dir) return -EINVAL; while ((evt_ent = readdir(event_dir))) { char path[PATH_MAX]; char *name = evt_ent->d_name; FILE *file; if (!strcmp(name, ".") || !strcmp(name, "..")) continue; /* * skip info files parsed in perf_pmu__new_alias() */ if (pmu_alias_info_file(name)) continue; scnprintf(path, PATH_MAX, "%s/%s", dir, name); file = fopen(path, "r"); if (!file) { pr_debug("Cannot open %s\n", path); continue; } if (perf_pmu__new_alias(head, dir, name, file) < 0) pr_debug("Cannot set up %s\n", name); fclose(file); } closedir(event_dir); return 0; } /* * Reading the pmu event aliases definition, which should be located at: * /sys/bus/event_source/devices//events as sysfs group attributes. */ static int pmu_aliases(const char *name, struct list_head *head) { struct stat st; char path[PATH_MAX]; const char *sysfs = sysfs__mountpoint(); if (!sysfs) return -1; snprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/events", sysfs, name); if (stat(path, &st) < 0) return 0; /* no error if 'events' does not exist */ if (pmu_aliases_parse(path, head)) return -1; return 0; } static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms) { struct parse_events_term *term, *cloned; LIST_HEAD(list); int ret; list_for_each_entry(term, &alias->terms, list) { ret = parse_events_term__clone(&cloned, term); if (ret) { parse_events_terms__purge(&list); return ret; } /* * Weak terms don't override command line options, * which we don't want for implicit terms in aliases. */ cloned->weak = true; list_add_tail(&cloned->list, &list); } list_splice(&list, terms); return 0; } /* * Reading/parsing the default pmu type value, which should be * located at: * /sys/bus/event_source/devices//type as sysfs attribute. */ static int pmu_type(const char *name, __u32 *type) { struct stat st; char path[PATH_MAX]; FILE *file; int ret = 0; const char *sysfs = sysfs__mountpoint(); if (!sysfs) return -1; snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name); if (stat(path, &st) < 0) return -1; file = fopen(path, "r"); if (!file) return -EINVAL; if (1 != fscanf(file, "%u", type)) ret = -1; fclose(file); return ret; } /* Add all pmus in sysfs to pmu list: */ static void pmu_read_sysfs(void) { char path[PATH_MAX]; DIR *dir; struct dirent *dent; const char *sysfs = sysfs__mountpoint(); if (!sysfs) return; snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); dir = opendir(path); if (!dir) return; while ((dent = readdir(dir))) { if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) continue; /* add to static LIST_HEAD(pmus): */ perf_pmu__find(dent->d_name); } closedir(dir); } static struct cpu_map *__pmu_cpumask(const char *path) { FILE *file; struct cpu_map *cpus; file = fopen(path, "r"); if (!file) return NULL; cpus = cpu_map__read(file); fclose(file); return cpus; } /* * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) * may have a "cpus" file. */ #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask" #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus" static struct cpu_map *pmu_cpumask(const char *name) { char path[PATH_MAX]; struct cpu_map *cpus; const char *sysfs = sysfs__mountpoint(); const char *templates[] = { CPUS_TEMPLATE_UNCORE, CPUS_TEMPLATE_CPU, NULL }; const char **template; if (!sysfs) return NULL; for (template = templates; *template; template++) { snprintf(path, PATH_MAX, *template, sysfs, name); cpus = __pmu_cpumask(path); if (cpus) return cpus; } return NULL; } static bool pmu_is_uncore(const char *name) { char path[PATH_MAX]; struct cpu_map *cpus; const char *sysfs = sysfs__mountpoint(); snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name); cpus = __pmu_cpumask(path); cpu_map__put(cpus); return !!cpus; } /* * PMU CORE devices have different name other than cpu in sysfs on some * platforms. * Looking for possible sysfs files to identify the arm core device. */ static int is_arm_pmu_core(const char *name) { struct stat st; char path[PATH_MAX]; const char *sysfs = sysfs__mountpoint(); if (!sysfs) return 0; /* Look for cpu sysfs (specific to arm) */ scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus", sysfs, name); if (stat(path, &st) == 0) return 1; return 0; } static char *perf_pmu__getcpuid(struct perf_pmu *pmu) { char *cpuid; static bool printed; cpuid = getenv("PERF_CPUID"); if (cpuid) cpuid = strdup(cpuid); if (!cpuid) cpuid = get_cpuid_str(pmu); if (!cpuid) return NULL; if (!printed) { pr_debug("Using CPUID %s\n", cpuid); printed = true; } return cpuid; } struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu) { struct pmu_events_map *map; char *cpuid = perf_pmu__getcpuid(pmu); int i; /* on some platforms which uses cpus map, cpuid can be NULL for * PMUs other than CORE PMUs. */ if (!cpuid) return NULL; i = 0; for (;;) { map = &pmu_events_map[i++]; if (!map->table) { map = NULL; break; } if (!strcmp_cpuid_str(map->cpuid, cpuid)) break; } free(cpuid); return map; } static bool pmu_uncore_alias_match(const char *pmu_name, const char *name) { char *tmp = NULL, *tok, *str; bool res; str = strdup(pmu_name); if (!str) return false; /* * uncore alias may be from different PMU with common prefix */ tok = strtok_r(str, ",", &tmp); if (strncmp(pmu_name, tok, strlen(tok))) { res = false; goto out; } /* * Match more complex aliases where the alias name is a comma-delimited * list of tokens, orderly contained in the matching PMU name. * * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we * match "socket" in "socketX_pmunameY" and then "pmuname" in * "pmunameY". */ for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) { name = strstr(name, tok); if (!name) { res = false; goto out; } } res = true; out: free(str); return res; } /* * From the pmu_events_map, find the table of PMU events that corresponds * to the current running CPU. Then, add all PMU events from that table * as aliases. */ static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu) { int i; struct pmu_events_map *map; const char *name = pmu->name; map = perf_pmu__find_map(pmu); if (!map) return; /* * Found a matching PMU events table. Create aliases */ i = 0; while (1) { const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu"; struct pmu_event *pe = &map->table[i++]; const char *pname = pe->pmu ? pe->pmu : cpu_name; if (!pe->name) { if (pe->metric_group || pe->metric_name) continue; break; } if (pmu_is_uncore(name) && pmu_uncore_alias_match(pname, name)) goto new_alias; if (strcmp(pname, name)) continue; new_alias: /* need type casts to override 'const' */ __perf_pmu__new_alias(head, NULL, (char *)pe->name, (char *)pe->desc, (char *)pe->event, (char *)pe->long_desc, (char *)pe->topic, (char *)pe->unit, (char *)pe->perpkg, (char *)pe->metric_expr, (char *)pe->metric_name); } } struct perf_event_attr * __weak perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) { return NULL; } static int pmu_max_precise(const char *name) { char path[PATH_MAX]; int max_precise = -1; scnprintf(path, PATH_MAX, "bus/event_source/devices/%s/caps/max_precise", name); sysfs__read_int(path, &max_precise); return max_precise; } static struct perf_pmu *pmu_lookup(const char *name) { struct perf_pmu *pmu; LIST_HEAD(format); LIST_HEAD(aliases); __u32 type; /* * The pmu data we store & need consists of the pmu * type value and format definitions. Load both right * now. */ if (pmu_format(name, &format)) return NULL; /* * Check the type first to avoid unnecessary work. */ if (pmu_type(name, &type)) return NULL; if (pmu_aliases(name, &aliases)) return NULL; pmu = zalloc(sizeof(*pmu)); if (!pmu) return NULL; pmu->cpus = pmu_cpumask(name); pmu->name = strdup(name); pmu->type = type; pmu->is_uncore = pmu_is_uncore(name); pmu->max_precise = pmu_max_precise(name); pmu_add_cpu_aliases(&aliases, pmu); INIT_LIST_HEAD(&pmu->format); INIT_LIST_HEAD(&pmu->aliases); list_splice(&format, &pmu->format); list_splice(&aliases, &pmu->aliases); list_add_tail(&pmu->list, &pmus); pmu->default_config = perf_pmu__get_default_config(pmu); return pmu; } static struct perf_pmu *pmu_find(const char *name) { struct perf_pmu *pmu; list_for_each_entry(pmu, &pmus, list) if (!strcmp(pmu->name, name)) return pmu; return NULL; } struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu) { /* * pmu iterator: If pmu is NULL, we start at the begin, * otherwise return the next pmu. Returns NULL on end. */ if (!pmu) { pmu_read_sysfs(); pmu = list_prepare_entry(pmu, &pmus, list); } list_for_each_entry_continue(pmu, &pmus, list) return pmu; return NULL; } struct perf_pmu *perf_pmu__find(const char *name) { struct perf_pmu *pmu; /* * Once PMU is loaded it stays in the list, * so we keep us from multiple reading/parsing * the pmu format definitions. */ pmu = pmu_find(name); if (pmu) return pmu; return pmu_lookup(name); } static struct perf_pmu_format * pmu_find_format(struct list_head *formats, const char *name) { struct perf_pmu_format *format; list_for_each_entry(format, formats, list) if (!strcmp(format->name, name)) return format; return NULL; } __u64 perf_pmu__format_bits(struct list_head *formats, const char *name) { struct perf_pmu_format *format = pmu_find_format(formats, name); __u64 bits = 0; int fbit; if (!format) return 0; for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) bits |= 1ULL << fbit; return bits; } /* * Sets value based on the format definition (format parameter) * and unformated value (value parameter). */ static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, bool zero) { unsigned long fbit, vbit; for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { if (!test_bit(fbit, format)) continue; if (value & (1llu << vbit++)) *v |= (1llu << fbit); else if (zero) *v &= ~(1llu << fbit); } } static __u64 pmu_format_max_value(const unsigned long *format) { int w; w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); if (!w) return 0; if (w < 64) return (1ULL << w) - 1; return -1; } /* * Term is a string term, and might be a param-term. Try to look up it's value * in the remaining terms. * - We have a term like "base-or-format-term=param-term", * - We need to find the value supplied for "param-term" (with param-term named * in a config string) later on in the term list. */ static int pmu_resolve_param_term(struct parse_events_term *term, struct list_head *head_terms, __u64 *value) { struct parse_events_term *t; list_for_each_entry(t, head_terms, list) { if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { if (!strcmp(t->config, term->config)) { t->used = true; *value = t->val.num; return 0; } } } if (verbose > 0) printf("Required parameter '%s' not specified\n", term->config); return -1; } static char *pmu_formats_string(struct list_head *formats) { struct perf_pmu_format *format; char *str = NULL; struct strbuf buf = STRBUF_INIT; unsigned i = 0; if (!formats) return NULL; /* sysfs exported terms */ list_for_each_entry(format, formats, list) if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) goto error; str = strbuf_detach(&buf, NULL); error: strbuf_release(&buf); return str; } /* * Setup one of config[12] attr members based on the * user input data - term parameter. */ static int pmu_config_term(struct list_head *formats, struct perf_event_attr *attr, struct parse_events_term *term, struct list_head *head_terms, bool zero, struct parse_events_error *err) { struct perf_pmu_format *format; __u64 *vp; __u64 val, max_val; /* * If this is a parameter we've already used for parameterized-eval, * skip it in normal eval. */ if (term->used) return 0; /* * Hardcoded terms should be already in, so nothing * to be done for them. */ if (parse_events__is_hardcoded_term(term)) return 0; format = pmu_find_format(formats, term->config); if (!format) { if (verbose > 0) printf("Invalid event/parameter '%s'\n", term->config); if (err) { char *pmu_term = pmu_formats_string(formats); err->idx = term->err_term; err->str = strdup("unknown term"); err->help = parse_events_formats_error_string(pmu_term); free(pmu_term); } return -EINVAL; } switch (format->value) { case PERF_PMU_FORMAT_VALUE_CONFIG: vp = &attr->config; break; case PERF_PMU_FORMAT_VALUE_CONFIG1: vp = &attr->config1; break; case PERF_PMU_FORMAT_VALUE_CONFIG2: vp = &attr->config2; break; default: return -EINVAL; } /* * Either directly use a numeric term, or try to translate string terms * using event parameters. */ if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { if (term->no_value && bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) { if (err) { err->idx = term->err_val; err->str = strdup("no value assigned for term"); } return -EINVAL; } val = term->val.num; } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { if (strcmp(term->val.str, "?")) { if (verbose > 0) { pr_info("Invalid sysfs entry %s=%s\n", term->config, term->val.str); } if (err) { err->idx = term->err_val; err->str = strdup("expected numeric value"); } return -EINVAL; } if (pmu_resolve_param_term(term, head_terms, &val)) return -EINVAL; } else return -EINVAL; max_val = pmu_format_max_value(format->bits); if (val > max_val) { if (err) { err->idx = term->err_val; if (asprintf(&err->str, "value too big for format, maximum is %llu", (unsigned long long)max_val) < 0) err->str = strdup("value too big for format"); return -EINVAL; } /* * Assume we don't care if !err, in which case the value will be * silently truncated. */ } pmu_format_value(format->bits, val, vp, zero); return 0; } int perf_pmu__config_terms(struct list_head *formats, struct perf_event_attr *attr, struct list_head *head_terms, bool zero, struct parse_events_error *err) { struct parse_events_term *term; list_for_each_entry(term, head_terms, list) { if (pmu_config_term(formats, attr, term, head_terms, zero, err)) return -EINVAL; } return 0; } /* * Configures event's 'attr' parameter based on the: * 1) users input - specified in terms parameter * 2) pmu format definitions - specified by pmu parameter */ int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, struct list_head *head_terms, struct parse_events_error *err) { bool zero = !!pmu->default_config; attr->type = pmu->type; return perf_pmu__config_terms(&pmu->format, attr, head_terms, zero, err); } static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, struct parse_events_term *term) { struct perf_pmu_alias *alias; char *name; if (parse_events__is_hardcoded_term(term)) return NULL; if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { if (term->val.num != 1) return NULL; if (pmu_find_format(&pmu->format, term->config)) return NULL; name = term->config; } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { if (strcasecmp(term->config, "event")) return NULL; name = term->val.str; } else { return NULL; } list_for_each_entry(alias, &pmu->aliases, list) { if (!strcasecmp(alias->name, name)) return alias; } return NULL; } static int check_info_data(struct perf_pmu_alias *alias, struct perf_pmu_info *info) { /* * Only one term in event definition can * define unit, scale and snapshot, fail * if there's more than one. */ if ((info->unit && alias->unit[0]) || (info->scale && alias->scale) || (info->snapshot && alias->snapshot)) return -EINVAL; if (alias->unit[0]) info->unit = alias->unit; if (alias->scale) info->scale = alias->scale; if (alias->snapshot) info->snapshot = alias->snapshot; return 0; } /* * Find alias in the terms list and replace it with the terms * defined for the alias */ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, struct perf_pmu_info *info) { struct parse_events_term *term, *h; struct perf_pmu_alias *alias; int ret; info->per_pkg = false; /* * Mark unit and scale as not set * (different from default values, see below) */ info->unit = NULL; info->scale = 0.0; info->snapshot = false; info->metric_expr = NULL; info->metric_name = NULL; list_for_each_entry_safe(term, h, head_terms, list) { alias = pmu_find_alias(pmu, term); if (!alias) continue; ret = pmu_alias_terms(alias, &term->list); if (ret) return ret; ret = check_info_data(alias, info); if (ret) return ret; if (alias->per_pkg) info->per_pkg = true; info->metric_expr = alias->metric_expr; info->metric_name = alias->metric_name; list_del(&term->list); free(term); } /* * if no unit or scale foundin aliases, then * set defaults as for evsel * unit cannot left to NULL */ if (info->unit == NULL) info->unit = ""; if (info->scale == 0.0) info->scale = 1.0; return 0; } int perf_pmu__new_format(struct list_head *list, char *name, int config, unsigned long *bits) { struct perf_pmu_format *format; format = zalloc(sizeof(*format)); if (!format) return -ENOMEM; format->name = strdup(name); format->value = config; memcpy(format->bits, bits, sizeof(format->bits)); list_add_tail(&format->list, list); return 0; } void perf_pmu__set_format(unsigned long *bits, long from, long to) { long b; if (!to) to = from; memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS)); for (b = from; b <= to; b++) set_bit(b, bits); } static int sub_non_neg(int a, int b) { if (b > a) return 0; return a - b; } static char *format_alias(char *buf, int len, struct perf_pmu *pmu, struct perf_pmu_alias *alias) { struct parse_events_term *term; int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name); list_for_each_entry(term, &alias->terms, list) { if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) used += snprintf(buf + used, sub_non_neg(len, used), ",%s=%s", term->config, term->val.str); } if (sub_non_neg(len, used) > 0) { buf[used] = '/'; used++; } if (sub_non_neg(len, used) > 0) { buf[used] = '\0'; used++; } else buf[len - 1] = '\0'; return buf; } static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, struct perf_pmu_alias *alias) { snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name); return buf; } struct sevent { char *name; char *desc; char *topic; char *str; char *pmu; char *metric_expr; char *metric_name; }; static int cmp_sevent(const void *a, const void *b) { const struct sevent *as = a; const struct sevent *bs = b; /* Put extra events last */ if (!!as->desc != !!bs->desc) return !!as->desc - !!bs->desc; if (as->topic && bs->topic) { int n = strcmp(as->topic, bs->topic); if (n) return n; } return strcmp(as->name, bs->name); } static void wordwrap(char *s, int start, int max, int corr) { int column = start; int n; while (*s) { int wlen = strcspn(s, " \t"); if (column + wlen >= max && column > start) { printf("\n%*s", start, ""); column = start + corr; } n = printf("%s%.*s", column > start ? " " : "", wlen, s); if (n <= 0) break; s += wlen; column += n; s = skip_spaces(s); } } void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag, bool long_desc, bool details_flag) { struct perf_pmu *pmu; struct perf_pmu_alias *alias; char buf[1024]; int printed = 0; int len, j; struct sevent *aliases; int numdesc = 0; int columns = pager_get_columns(); char *topic = NULL; pmu = NULL; len = 0; while ((pmu = perf_pmu__scan(pmu)) != NULL) { list_for_each_entry(alias, &pmu->aliases, list) len++; if (pmu->selectable) len++; } aliases = zalloc(sizeof(struct sevent) * len); if (!aliases) goto out_enomem; pmu = NULL; j = 0; while ((pmu = perf_pmu__scan(pmu)) != NULL) { list_for_each_entry(alias, &pmu->aliases, list) { char *name = alias->desc ? alias->name : format_alias(buf, sizeof(buf), pmu, alias); bool is_cpu = !strcmp(pmu->name, "cpu"); if (event_glob != NULL && !(strglobmatch_nocase(name, event_glob) || (!is_cpu && strglobmatch_nocase(alias->name, event_glob)) || (alias->topic && strglobmatch_nocase(alias->topic, event_glob)))) continue; if (is_cpu && !name_only && !alias->desc) name = format_alias_or(buf, sizeof(buf), pmu, alias); aliases[j].name = name; if (is_cpu && !name_only && !alias->desc) aliases[j].name = format_alias_or(buf, sizeof(buf), pmu, alias); aliases[j].name = strdup(aliases[j].name); if (!aliases[j].name) goto out_enomem; aliases[j].desc = long_desc ? alias->long_desc : alias->desc; aliases[j].topic = alias->topic; aliases[j].str = alias->str; aliases[j].pmu = pmu->name; aliases[j].metric_expr = alias->metric_expr; aliases[j].metric_name = alias->metric_name; j++; } if (pmu->selectable && (event_glob == NULL || strglobmatch(pmu->name, event_glob))) { char *s; if (asprintf(&s, "%s//", pmu->name) < 0) goto out_enomem; aliases[j].name = s; j++; } } len = j; qsort(aliases, len, sizeof(struct sevent), cmp_sevent); for (j = 0; j < len; j++) { /* Skip duplicates */ if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) continue; if (name_only) { printf("%s ", aliases[j].name); continue; } if (aliases[j].desc && !quiet_flag) { if (numdesc++ == 0) printf("\n"); if (aliases[j].topic && (!topic || strcmp(topic, aliases[j].topic))) { printf("%s%s:\n", topic ? "\n" : "", aliases[j].topic); topic = aliases[j].topic; } printf(" %-50s\n", aliases[j].name); printf("%*s", 8, "["); wordwrap(aliases[j].desc, 8, columns, 0); printf("]\n"); if (details_flag) { printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str); if (aliases[j].metric_name) printf(" MetricName: %s", aliases[j].metric_name); if (aliases[j].metric_expr) printf(" MetricExpr: %s", aliases[j].metric_expr); putchar('\n'); } } else printf(" %-50s [Kernel PMU event]\n", aliases[j].name); printed++; } if (printed && pager_in_use()) printf("\n"); out_free: for (j = 0; j < len; j++) zfree(&aliases[j].name); zfree(&aliases); return; out_enomem: printf("FATAL: not enough memory to print PMU events\n"); if (aliases) goto out_free; } bool pmu_have_event(const char *pname, const char *name) { struct perf_pmu *pmu; struct perf_pmu_alias *alias; pmu = NULL; while ((pmu = perf_pmu__scan(pmu)) != NULL) { if (strcmp(pname, pmu->name)) continue; list_for_each_entry(alias, &pmu->aliases, list) if (!strcmp(alias->name, name)) return true; } return false; } static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name) { struct stat st; char path[PATH_MAX]; const char *sysfs; sysfs = sysfs__mountpoint(); if (!sysfs) return NULL; snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name); if (stat(path, &st) < 0) return NULL; return fopen(path, "r"); } int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) { va_list args; FILE *file; int ret = EOF; va_start(args, fmt); file = perf_pmu__open_file(pmu, name); if (file) { ret = vfscanf(file, fmt, args); fclose(file); } va_end(args); return ret; }