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perf list: List kernel supplied event aliases
List the kernel supplied pmu event aliases in perf list It's better when the users can actually see them. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1366480949-32292-2-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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50e200f079
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5 changed files with 86 additions and 2 deletions
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@ -8,7 +8,7 @@ perf-list - List all symbolic event types
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SYNOPSIS
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--------
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[verse]
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'perf list' [hw|sw|cache|tracepoint|event_glob]
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'perf list' [hw|sw|cache|tracepoint|pmu|event_glob]
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DESCRIPTION
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-----------
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@ -104,6 +104,8 @@ To limit the list use:
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'subsys_glob:event_glob' to filter by tracepoint subsystems such as sched,
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block, etc.
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. 'pmu' to print the kernel supplied PMU events.
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. If none of the above is matched, it will apply the supplied glob to all
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events, printing the ones that match.
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@ -13,6 +13,7 @@
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#include "util/parse-events.h"
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#include "util/cache.h"
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#include "util/pmu.h"
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int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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@ -37,6 +38,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
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else if (strcmp(argv[i], "cache") == 0 ||
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strcmp(argv[i], "hwcache") == 0)
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print_hwcache_events(NULL, false);
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else if (strcmp(argv[i], "pmu") == 0)
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print_pmu_events(NULL, false);
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else if (strcmp(argv[i], "--raw-dump") == 0)
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print_events(NULL, true);
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else {
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@ -1110,6 +1110,8 @@ int print_hwcache_events(const char *event_glob, bool name_only)
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}
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}
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if (printed)
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printf("\n");
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return printed;
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}
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@ -1164,11 +1166,12 @@ void print_events(const char *event_glob, bool name_only)
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print_hwcache_events(event_glob, name_only);
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print_pmu_events(event_glob, name_only);
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if (event_glob != NULL)
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return;
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if (!name_only) {
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printf("\n");
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printf(" %-50s [%s]\n",
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"rNNN",
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event_type_descriptors[PERF_TYPE_RAW]);
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@ -564,3 +564,76 @@ void perf_pmu__set_format(unsigned long *bits, long from, long to)
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for (b = from; b <= to; b++)
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set_bit(b, bits);
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}
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static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
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struct perf_pmu_alias *alias)
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{
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snprintf(buf, len, "%s/%s/", pmu->name, alias->name);
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return buf;
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}
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static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
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struct perf_pmu_alias *alias)
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{
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snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
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return buf;
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}
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static int cmp_string(const void *a, const void *b)
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{
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const char * const *as = a;
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const char * const *bs = b;
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return strcmp(*as, *bs);
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}
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void print_pmu_events(const char *event_glob, bool name_only)
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{
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struct perf_pmu *pmu;
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struct perf_pmu_alias *alias;
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char buf[1024];
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int printed = 0;
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int len, j;
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char **aliases;
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pmu = NULL;
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len = 0;
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while ((pmu = perf_pmu__scan(pmu)) != NULL)
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list_for_each_entry(alias, &pmu->aliases, list)
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len++;
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aliases = malloc(sizeof(char *) * len);
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if (!aliases)
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return;
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pmu = NULL;
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j = 0;
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while ((pmu = perf_pmu__scan(pmu)) != NULL)
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list_for_each_entry(alias, &pmu->aliases, list) {
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char *name = format_alias(buf, sizeof(buf), pmu, alias);
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bool is_cpu = !strcmp(pmu->name, "cpu");
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if (event_glob != NULL &&
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!(strglobmatch(name, event_glob) ||
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(!is_cpu && strglobmatch(alias->name,
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event_glob))))
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continue;
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aliases[j] = name;
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if (is_cpu && !name_only)
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aliases[j] = format_alias_or(buf, sizeof(buf),
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pmu, alias);
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aliases[j] = strdup(aliases[j]);
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j++;
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}
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len = j;
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qsort(aliases, len, sizeof(char *), cmp_string);
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for (j = 0; j < len; j++) {
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if (name_only) {
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printf("%s ", aliases[j]);
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continue;
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}
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printf(" %-50s [Kernel PMU event]\n", aliases[j]);
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free(aliases[j]);
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printed++;
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}
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if (printed)
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printf("\n");
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free(aliases);
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}
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@ -3,6 +3,7 @@
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#include <linux/bitops.h>
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#include <linux/perf_event.h>
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#include <stdbool.h>
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enum {
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PERF_PMU_FORMAT_VALUE_CONFIG,
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@ -40,5 +41,7 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);
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struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
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void print_pmu_events(const char *event_glob, bool name_only);
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int perf_pmu__test(void);
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#endif /* __PMU_H */
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