diff options
| -rw-r--r-- | tools/perf/util/pmu.c | 83 | ||||
| -rw-r--r-- | tools/perf/util/pmu.h | 1 |
2 files changed, 68 insertions, 16 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 10668b7f5272..9857fb14ea86 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -222,7 +222,7 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, } static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, - char *desc __maybe_unused, char *val) + char *desc, char *val) { struct perf_pmu_alias *alias; int ret; @@ -255,6 +255,8 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, perf_pmu__parse_snapshot(alias, dir, name); } + alias->desc = desc ? strdup(desc) : NULL; + list_add_tail(&alias->list, list); return 0; @@ -1043,11 +1045,42 @@ static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, return buf; } -static int cmp_string(const void *a, const void *b) +struct pair { + char *name; + char *desc; +}; + +static int cmp_pair(const void *a, const void *b) +{ + const struct pair *as = a; + const struct pair *bs = b; + + /* Put extra events last */ + if (!!as->desc != !!bs->desc) + return !!as->desc - !!bs->desc; + return strcmp(as->name, bs->name); +} + +static void wordwrap(char *s, int start, int max, int corr) { - const char * const *as = a; - const char * const *bs = b; - return strcmp(*as, *bs); + 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; + while (isspace(*s)) + s++; + } } void print_pmu_events(const char *event_glob, bool name_only) @@ -1057,7 +1090,9 @@ void print_pmu_events(const char *event_glob, bool name_only) char buf[1024]; int printed = 0; int len, j; - char **aliases; + struct pair *aliases; + int numdesc = 0; + int columns = 78; pmu = NULL; len = 0; @@ -1067,14 +1102,15 @@ void print_pmu_events(const char *event_glob, bool name_only) if (pmu->selectable) len++; } - aliases = zalloc(sizeof(char *) * len); + aliases = zalloc(sizeof(struct pair) * 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 = format_alias(buf, sizeof(buf), pmu, alias); + char *name = alias->desc ? alias->name : + format_alias(buf, sizeof(buf), pmu, alias); bool is_cpu = !strcmp(pmu->name, "cpu"); if (event_glob != NULL && @@ -1083,12 +1119,19 @@ void print_pmu_events(const char *event_glob, bool name_only) event_glob)))) continue; - if (is_cpu && !name_only) + if (is_cpu && !name_only && !alias->desc) name = format_alias_or(buf, sizeof(buf), pmu, alias); - aliases[j] = strdup(name); - if (aliases[j] == NULL) + 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 = alias->desc; j++; } if (pmu->selectable && @@ -1096,25 +1139,33 @@ void print_pmu_events(const char *event_glob, bool name_only) char *s; if (asprintf(&s, "%s//", pmu->name) < 0) goto out_enomem; - aliases[j] = s; + aliases[j].name = s; j++; } } len = j; - qsort(aliases, len, sizeof(char *), cmp_string); + qsort(aliases, len, sizeof(struct pair), cmp_pair); for (j = 0; j < len; j++) { if (name_only) { - printf("%s ", aliases[j]); + printf("%s ", aliases[j].name); continue; } - printf(" %-50s [Kernel PMU event]\n", aliases[j]); + if (aliases[j].desc) { + if (numdesc++ == 0) + printf("\n"); + printf(" %-50s\n", aliases[j].name); + printf("%*s", 8, "["); + wordwrap(aliases[j].desc, 8, columns, 0); + printf("]\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]); + zfree(&aliases[j].name); zfree(&aliases); return; diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 743422ad900b..51d8d0d35e63 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -40,6 +40,7 @@ struct perf_pmu_info { struct perf_pmu_alias { char *name; + char *desc; struct list_head terms; /* HEAD struct parse_events_term -> list */ struct list_head list; /* ELEM */ char unit[UNIT_MAX_LEN+1]; |