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Commit dc098b35 authored by Andi Kleen's avatar Andi Kleen Committed by Arnaldo Carvalho de Melo
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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: default avatarAndi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1366480949-32292-2-git-send-email-andi@firstfloor.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 50e200f0
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+3 −1
Original line number Diff line number Diff line
@@ -8,7 +8,7 @@ perf-list - List all symbolic event types
SYNOPSIS
--------
[verse]
'perf list' [hw|sw|cache|tracepoint|event_glob]
'perf list' [hw|sw|cache|tracepoint|pmu|event_glob]

DESCRIPTION
-----------
@@ -104,6 +104,8 @@ To limit the list use:
  'subsys_glob:event_glob' to filter by tracepoint subsystems such as sched,
  block, etc.

. 'pmu' to print the kernel supplied PMU events.

. If none of the above is matched, it will apply the supplied glob to all
  events, printing the ones that match.

+3 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@

#include "util/parse-events.h"
#include "util/cache.h"
#include "util/pmu.h"

int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
@@ -37,6 +38,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
			else if (strcmp(argv[i], "cache") == 0 ||
				 strcmp(argv[i], "hwcache") == 0)
				print_hwcache_events(NULL, false);
			else if (strcmp(argv[i], "pmu") == 0)
				print_pmu_events(NULL, false);
			else if (strcmp(argv[i], "--raw-dump") == 0)
				print_events(NULL, true);
			else {
+4 −1
Original line number Diff line number Diff line
@@ -1110,6 +1110,8 @@ int print_hwcache_events(const char *event_glob, bool name_only)
		}
	}

	if (printed)
		printf("\n");
	return printed;
}

@@ -1164,11 +1166,12 @@ void print_events(const char *event_glob, bool name_only)

	print_hwcache_events(event_glob, name_only);

	print_pmu_events(event_glob, name_only);

	if (event_glob != NULL)
		return;

	if (!name_only) {
		printf("\n");
		printf("  %-50s [%s]\n",
		       "rNNN",
		       event_type_descriptors[PERF_TYPE_RAW]);
+73 −0
Original line number Diff line number Diff line
@@ -564,3 +564,76 @@ void perf_pmu__set_format(unsigned long *bits, long from, long to)
	for (b = from; b <= to; b++)
		set_bit(b, bits);
}

static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
			  struct perf_pmu_alias *alias)
{
	snprintf(buf, len, "%s/%s/", pmu->name, alias->name);
	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;
}

static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;
	return strcmp(*as, *bs);
}

void print_pmu_events(const char *event_glob, bool name_only)
{
	struct perf_pmu *pmu;
	struct perf_pmu_alias *alias;
	char buf[1024];
	int printed = 0;
	int len, j;
	char **aliases;

	pmu = NULL;
	len = 0;
	while ((pmu = perf_pmu__scan(pmu)) != NULL)
		list_for_each_entry(alias, &pmu->aliases, list)
			len++;
	aliases = malloc(sizeof(char *) * len);
	if (!aliases)
		return;
	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);
			bool is_cpu = !strcmp(pmu->name, "cpu");

			if (event_glob != NULL &&
			    !(strglobmatch(name, event_glob) ||
			      (!is_cpu && strglobmatch(alias->name,
						       event_glob))))
				continue;
			aliases[j] = name;
			if (is_cpu && !name_only)
				aliases[j] = format_alias_or(buf, sizeof(buf),
							      pmu, alias);
			aliases[j] = strdup(aliases[j]);
			j++;
		}
	len = j;
	qsort(aliases, len, sizeof(char *), cmp_string);
	for (j = 0; j < len; j++) {
		if (name_only) {
			printf("%s ", aliases[j]);
			continue;
		}
		printf("  %-50s [Kernel PMU event]\n", aliases[j]);
		free(aliases[j]);
		printed++;
	}
	if (printed)
		printf("\n");
	free(aliases);
}
+3 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@

#include <linux/bitops.h>
#include <linux/perf_event.h>
#include <stdbool.h>

enum {
	PERF_PMU_FORMAT_VALUE_CONFIG,
@@ -40,5 +41,7 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);

struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);

void print_pmu_events(const char *event_glob, bool name_only);

int perf_pmu__test(void);
#endif /* __PMU_H */