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perf: Migrate per cpu event accounting
author
Frederic Weisbecker
<fweisbec@gmail.com>
Tue, 23 Jul 2013 00:31:03 +0000
(
02:31
+0200)
committer
Ingo Molnar
<mingo@kernel.org>
Tue, 30 Jul 2013 20:29:14 +0000
(22:29 +0200)
When an event is migrated, move the event per-cpu
accounting accordingly so that branch stack and cgroup
events work correctly on the new CPU.
Original-patch-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link:
http://lkml.kernel.org/r/1374539466-4799-6-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/events/core.c
patch
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diff --git
a/kernel/events/core.c
b/kernel/events/core.c
index
3a4b73a
..
63bdec9
100644
(file)
--- a/
kernel/events/core.c
+++ b/
kernel/events/core.c
@@
-7145,6
+7145,7
@@
void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu)
list_for_each_entry_safe(event, tmp, &src_ctx->event_list,
event_entry) {
perf_remove_from_context(event);
+ unaccount_event_cpu(event, src_cpu);
put_ctx(src_ctx);
list_add(&event->event_entry, &events);
}
@@
-7157,6
+7158,7
@@
void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu)
list_del(&event->event_entry);
if (event->state >= PERF_EVENT_STATE_OFF)
event->state = PERF_EVENT_STATE_INACTIVE;
+ account_event_cpu(event, dst_cpu);
perf_install_in_context(dst_ctx, event, dst_cpu);
get_ctx(dst_ctx);
}