Commit-ID: 114d10ff9bc2cd4bfae6180476b8fe0f8047e022
Gitweb: http://git.kernel.org/tip/114d10ff9bc2cd4bfae6180476b8fe0f8047e022
Author: Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Mon, 4 May 2009 18:54:32 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 4 May 2009 18:54:32 +0200
perf_counter: round-robin per-CPU counters too
This used to be unstable when we had the rq->lock dependencies,
but now that they are that of the past we can turn on percpu
counter RR too.
[ Impact: handle counter over-commit for per-CPU counters too ]
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/perf_counter.c | 10 +++-------
1 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 8660ae5..b9679c3 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1069,18 +1069,14 @@ void perf_counter_task_tick(struct task_struct *curr, int cpu)
{
struct perf_cpu_context *cpuctx = &per_cpu(perf_cpu_context, cpu);
struct perf_counter_context *ctx = &curr->perf_counter_ctx;
- const int rotate_percpu = 0;
- if (rotate_percpu)
- perf_counter_cpu_sched_out(cpuctx);
+ perf_counter_cpu_sched_out(cpuctx);
perf_counter_task_sched_out(curr, cpu);
- if (rotate_percpu)
- rotate_ctx(&cpuctx->ctx);
+ rotate_ctx(&cpuctx->ctx);
rotate_ctx(ctx);
- if (rotate_percpu)
- perf_counter_cpu_sched_in(cpuctx, cpu);
+ perf_counter_cpu_sched_in(cpuctx, cpu);
perf_counter_task_sched_in(curr, cpu);
}
--
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