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authorChengming Zhou <zhouchengming@bytedance.com>2022-03-29 23:45:21 +0800
committerPeter Zijlstra <peterz@infradead.org>2022-04-05 09:59:45 +0200
commit6875186aea5ce09a644758d9193265da1cc187c7 (patch)
treebc6a606f28579611141894f400bfb420c4bfa90c /kernel
parenta0827713e298d021d3c79ae7423aea408f3f7c3a (diff)
downloadlinux-6875186aea5ce09a644758d9193265da1cc187c7.tar.bz2
perf/core: Use perf_cgroup_info->active to check if cgroup is active
Since we use perf_cgroup_set_timestamp() to start cgroup time and set active to 1, then use update_cgrp_time_from_cpuctx() to stop cgroup time and set active to 0. We can use info->active directly to check if cgroup is active. Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220329154523.86438-3-zhouchengming@bytedance.com
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/core.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 65450200691c..a08fb92b3934 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -780,7 +780,6 @@ static inline void update_cgrp_time_from_cpuctx(struct perf_cpu_context *cpuctx,
static inline void update_cgrp_time_from_event(struct perf_event *event)
{
struct perf_cgroup_info *info;
- struct perf_cgroup *cgrp;
/*
* ensure we access cgroup data only when needed and
@@ -789,14 +788,12 @@ static inline void update_cgrp_time_from_event(struct perf_event *event)
if (!is_cgroup_event(event))
return;
- cgrp = perf_cgroup_from_task(current, event->ctx);
+ info = this_cpu_ptr(event->cgrp->info);
/*
* Do not update time when cgroup is not active
*/
- if (cgroup_is_descendant(cgrp->css.cgroup, event->cgrp->css.cgroup)) {
- info = this_cpu_ptr(event->cgrp->info);
+ if (info->active)
__update_cgrp_time(info, perf_clock(), true);
- }
}
static inline void