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SubjectRe: [PATCH V6 3/6] perf, x86: large PEBS interrupt threshold
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?


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