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Groups > linux.kernel > #1369909
| From | Markus Trippelsdorf <markus@trippelsdorf.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 |
| Date | 2016-04-02 11:40 +0200 |
| Message-ID | <rjqcb-1I3-39@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Current git kernel sometimes shows: perf: interrupt took too long (71 > 52), lowering kernel.perf_event_max_sample_rate to 300 perf: interrupt took too long (103 > 88), lowering kernel.perf_event_max_sample_rate to 300 perf: interrupt took too long (130 > 128), lowering kernel.perf_event_max_sample_rate to 300 perf: interrupt took too long (175 > 162), lowering kernel.perf_event_max_sample_rate to 300 perf: interrupt took too long (219 > 218), lowering kernel.perf_event_max_sample_rate to 300 ... when running e.g. "perf top" even when /proc/sys/kernel/perf_cpu_time_max_percent is set to 0. -- Markus
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"perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Markus Trippelsdorf <markus@trippelsdorf.de> - 2016-04-02 11:40 +0200
Re: "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Peter Zijlstra <peterz@infradead.org> - 2016-04-02 13:10 +0200
Re: "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Markus Trippelsdorf <markus@trippelsdorf.de> - 2016-04-02 13:20 +0200
Re: "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Markus Trippelsdorf <markus@trippelsdorf.de> - 2016-04-02 13:30 +0200
Re: "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Peter Zijlstra <peterz@infradead.org> - 2016-04-02 18:40 +0200
Re: "perf: interrupt took too long" messages even with perf_cpu_time_max_percent==0 Markus Trippelsdorf <markus@trippelsdorf.de> - 2016-04-13 12:10 +0200
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