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>

3 files changed, 80 insertions, 1 deletions

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a5076f4f6016..2c460ede0a69 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -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]);
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 1d1862dcbbbc..bc9d8069d376 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -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);
+}
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index d17b5656bacf..6b2cbe2d4cc3 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -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 */