Re: [PATCH] perf/x86/intel: restrict period on Nehalem

2019-08-23 Thread Peter Zijlstra
On Mon, Aug 19, 2019 at 07:13:31PM -0400, Josh Hunt wrote: > We see our Nehalem machines reporting 'perfevents: irq loop stuck!' in > some cases when using perf: > > perfevents: irq loop stuck! > I found that a period limit of 32 was the lowest I could set it to without > the problem reoccurring.

[PATCH] perf/x86/intel: restrict period on Nehalem

2019-08-19 Thread Josh Hunt
We see our Nehalem machines reporting 'perfevents: irq loop stuck!' in some cases when using perf: perfevents: irq loop stuck! WARNING: CPU: 0 PID: 3485 at arch/x86/events/intel/core.c:2282 intel_pmu_handle_irq+0x37b/0x530 ... RIP: 0010:intel_pmu_handle_irq+0x37b/0x530 ... Call Trace: ? perf_eve