On Fri, Dec 02, 2016 at 04:19:09PM -0500, kan.li...@intel.com wrote:
> @@ -1221,6 +1225,11 @@ static inline bool has_addr_filter(struct perf_event
> *event)
> return event->pmu->nr_addr_filters;
> }
>
> +static inline bool needs_log_overhead(struct perf_event *event)
> +{
> + return !
From: Kan Liang
A new perf record is introduced to export perf overhead information to
userspace. So the user can measure the overhead of sampling directly.
If the user doesn't want to use this feature, it can be switched off by
configuring the user space tool.
To output the overhead information
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