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authorPeter Zijlstra2014-02-24 12:43:31 +0100
committerIngo Molnar2014-02-27 12:43:26 +0100
commit4a2345937c17722bd2979f662ae909846b4a052a (patch)
tree4936c660a961dcbc9369850dfdf785a7c8f976f7
parentc347a2f1793e285b0812343e715bb7e953dbdf68 (diff)
perf: Optimize group_sched_in()
Use the ctx pmu instead of the event pmu. When a group leader is a software event but the group contains hardware events, the entire group is on the hardware PMU. Using the hardware PMU for the transaction makes most sense since that's the most expensive one to programm (and software PMUs generally don't have TXN support anyway). Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-sctoo9t2f3nn2c9g568928q3@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--kernel/events/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 823a53d72d6a..661951ab8ae7 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1733,7 +1733,7 @@ group_sched_in(struct perf_event *group_event,
struct perf_event_context *ctx)
{
struct perf_event *event, *partial_group = NULL;
- struct pmu *pmu = group_event->pmu;
+ struct pmu *pmu = ctx->pmu;
u64 now = ctx->time;
bool simulate = false;