| From: Tom Zanussi <tom.zanussi@linux.intel.com> |
| Date: Fri, 22 Sep 2017 14:58:18 -0500 |
| Subject: [PATCH 03/48] tracing: Remove lookups from tracing_map hitcount |
| |
| Lookups inflate the hitcount, making it essentially useless. Only |
| inserts and updates should really affect the hitcount anyway, so |
| explicitly filter lookups out. |
| |
| Link: http://lkml.kernel.org/r/c8d9dc39d269a8abf88bf4102d0dfc65deb0fc7f.1506105045.git.tom.zanussi@linux.intel.com |
| |
| Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> |
| Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
| (cherry picked from commit 83c07ecc4203728e85fc4a2ce6fdf25d16ea118e) |
| Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| --- |
| kernel/trace/tracing_map.c | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| --- a/kernel/trace/tracing_map.c |
| +++ b/kernel/trace/tracing_map.c |
| @@ -428,7 +428,8 @@ static inline struct tracing_map_elt * |
| |
| if (test_key && test_key == key_hash && 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; |
| } |
| |
