[PATCH v2 36/40] tracing: Remove lookups from tracing_map hitcount
From: Tom Zanussi <hidden>
Date: 2017-09-05 22:01:13
Also in:
lkml
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Lookups inflate the hitcount, making it essentially useless. Only inserts and updates should really affect the hitcount anyway, so explicitly filter lookups out. Signed-off-by: Tom Zanussi <redacted> --- kernel/trace/tracing_map.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index a4e5a56..f8e2338 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c@@ -538,7 +538,8 @@ static inline bool keys_match(void *key, void *test_key, unsigned key_size) if (test_key && test_key == key_hash) { if (entry->val && keys_match(key, entry->val->key, map->key_size)) { - atomic64_inc(&map->hits); + if (!lookup_only) + atomic64_inc(&map->hits); return entry->val; } else if (unlikely(!entry->val)) { /*
--
1.9.3