* Shi, Yang | 2015-12-11 09:57:06 [-0800]:
>On 12/11/2015 9:36 AM, Sebastian Andrzej Siewior wrote:
>>And 4.1.12 (without -rt13) is not having this kind of problem?
>
>No. mainline 4.1.12 works well.
The same thing here. But I get this:
Performance counter stats for 'tar tJ':
144,407 cs
16,733 page-faults
16,732 minor-faults
1 major-faults
805,335 iTLB-load-misses (24.83%)
6,606,698 dTLB-load-misses (24.63%)
3,734,425,072 branches (37.35%)
228,660,856 L1-dcache-prefetches (37.06%)
4,564,273 L1-icache-prefetches (49.68%)
399,365,890 branch-misses # 10.69% of all branches (62.63%)
79,278,129 cache-misses (62.96%)
30,825,564,763 cycles (50.79%)
8.705696429 seconds time elapsed
once I apply this chunk:
diff --git a/kernel/events/core.c b/kernel/events/core.c
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -802,6 +802,7 @@ static void __perf_mux_hrtimer_init(struct perf_cpu_context *cpuctx, int cpu)
raw_spin_lock_init(&cpuctx->hrtimer_lock);
hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED);
timer->function = perf_mux_hrtimer_handler;
+ timer->irqsafe = 1;
}
static int perf_mux_hrtimer_restart(struct perf_cpu_context *cpuctx)
>Yang
Sebastian
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