[PATCH 04/10] perf, tools: Support per pmu json aliases

[Andi Kleen]

From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Add support for registering json aliases per PMU. Any alias
with an unit matching the prefix is registered to the PMU.
Uncore has multiple instances of most units, so all
these aliases get registered for each individual PMU
(this is important later to run the event on every instance
of the PMU).

To avoid printing the events multiple times in perf list
filter out duplicated events during printing.

v2: Rely on uncore_ prefix already in unit
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
 tools/perf/util/pmu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 1ab981739798..8cc6d8d9ee02 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -588,14 +588,13 @@ static struct perf_pmu *pmu_lookup(const char *name)
 	if (pmu_format(name, &format))
 		return NULL;
 
-	if (pmu_aliases(name, &aliases))
+	if (pmu_type(name, &type))
 		return NULL;
 
-	pmu_add_cpu_aliases(&aliases, name);
-
-	if (pmu_type(name, &type))
+	if (pmu_aliases(name, &aliases))
 		return NULL;
 
+	pmu_add_cpu_aliases(&aliases, name);
 	pmu = zalloc(sizeof(*pmu));
 	if (!pmu)
 		return NULL;
@@ -1193,6 +1192,9 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 	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;
-- 
2.5.5