Messages in this thread | | | From | "Liang, Kan" <> | Subject | RE: [PATCH V6 3/6] perf, x86: large PEBS interrupt threshold | Date | Wed, 15 Apr 2015 18:35:48 +0000 |
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> > On Thu, Apr 09, 2015 at 12:37:43PM -0400, Kan Liang wrote: > > @@ -280,8 +280,9 @@ static int alloc_pebs_buffer(int cpu) > > ds->pebs_absolute_maximum = ds->pebs_buffer_base + > > max * x86_pmu.pebs_record_size; > > > > - ds->pebs_interrupt_threshold = ds->pebs_buffer_base + > > - thresh * x86_pmu.pebs_record_size; > > + if (x86_pmu.intel_cap.pebs_format < 1) > > + ds->pebs_interrupt_threshold = ds->pebs_buffer_base + > > + x86_pmu.pebs_record_size; > > > > return 0; > > } > > I can't seem to figure out what this is about.. help?
We move AUTO_RELOAD and large PEBS check to intel_pmu_hw_config. But for earlier platform, it calls x86_pmu_hw_config. So we force single PEBS record for old platform.
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