Sep 29 22:00:31 localhost kernel: perf: interrupt took too long (2508 > 2500), lowering kernel.perf_event_max_sample_rate to 79000

Sep 29 22:05:51 localhost kernel: perf: interrupt took too long (3156 > 3135), lowering kernel.perf_event_max_sample_rate to 63000

Sep 29 22:11:54 localhost kernel: perf: interrupt took too long (3946 > 3945), lowering kernel.perf_event_max_sample_rate to 50000

Sep 29 22:19:02 localhost kernel: perf: interrupt took too long (4965 > 4932), lowering kernel.perf_event_max_sample_rate to 40000

Sep 29 22:24:15 localhost kernel: perf: interrupt took too long (3665 > 2500), lowering kernel.perf_event_max_sample_rate to 54000

Sep 29 22:24:20 localhost kernel: perf: interrupt took too long (5015 > 4581), lowering kernel.perf_event_max_sample_rate to 39000

[root@localhost kernel]# cat /etc/sysctl.conf|grep per

kernel.perf_event_max_sample_rate = 100000

kernel.perf_cpu_time_max_percent = 0

echo 0 > /proc/sys/kernel/perf_cpu_time_max_percent

echo 10000 > /proc/sys/kernel/perf_event_max_sample_rate

ITPub博客

tpcc sysbench 测试 kernel: perf: interrupt took too long