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authorNamhyung Kim <namhyung@kernel.org>2021-03-11 20:54:13 +0900
committerPeter Zijlstra <peterz@infradead.org>2021-03-16 21:44:43 +0100
commitff65338e78418e5970a7aabbabb94c46f2bb821d (patch)
tree038304f39554a28108481e82015246969e35328a /kernel/events
parentbdacfaf26da166dd56c62f23f27a4b3e71f2d89e (diff)
perf core: Allocate perf_event in the target node memory
For cpu events, it'd better allocating them in the corresponding node memory as they would be mostly accessed by the target cpu. Although perf tools sets the cpu affinity before calling perf_event_open, there are places it doesn't (notably perf record) and we should consider other external users too. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210311115413.444407-2-namhyung@kernel.org
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index f526ddb50d5e..6182cb199f72 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -11288,13 +11288,16 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
struct perf_event *event;
struct hw_perf_event *hwc;
long err = -EINVAL;
+ int node;
if ((unsigned)cpu >= nr_cpu_ids) {
if (!task || cpu != -1)
return ERR_PTR(-EINVAL);
}
- event = kmem_cache_zalloc(perf_event_cache, GFP_KERNEL);
+ node = (cpu >= 0) ? cpu_to_node(cpu) : -1;
+ event = kmem_cache_alloc_node(perf_event_cache, GFP_KERNEL | __GFP_ZERO,
+ node);
if (!event)
return ERR_PTR(-ENOMEM);