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From: Yang Jihong <yangjihong1@huawei.com>
To: <peterz@infradead.org>, <mingo@redhat.com>, <acme@kernel.org>,
	<mark.rutland@arm.com>, <alexander.shishkin@linux.intel.com>,
	<jolsa@kernel.org>, <namhyung@kernel.org>, <irogers@google.com>,
	<adrian.hunter@intel.com>, <linux-perf-users@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Cc: <yangjihong1@huawei.com>
Subject: [PATCH] perf pmu: Filter out search events table of software pmu in perf_pmu__lookup()
Date: Mon, 16 Oct 2023 09:33:09 +0000	[thread overview]
Message-ID: <20231016093309.726436-1-yangjihong1@huawei.com> (raw)

For software pmu, the events_table is empty, reducing unnecessary search.

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
---
 tools/perf/util/pmu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 6428e2648289..59c8394a4efa 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1033,7 +1033,8 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char
 		pmu->id = pmu_id(name);
 	pmu->max_precise = pmu_max_precise(dirfd, pmu);
 	pmu->alias_name = pmu_find_alias_name(pmu, dirfd);
-	pmu->events_table = perf_pmu__find_events_table(pmu);
+	if (!perf_pmu__is_software(pmu))
+		pmu->events_table = perf_pmu__find_events_table(pmu);
 	pmu_add_sys_aliases(pmu);
 	list_add_tail(&pmu->list, pmus);
 
-- 
2.34.1


             reply	other threads:[~2023-10-16  9:35 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-16  9:33 Yang Jihong [this message]
2023-10-16 21:04 ` [PATCH] perf pmu: Filter out search events table of software pmu in perf_pmu__lookup() Ian Rogers

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