On Wed, Mar 25, 2015 at 10:57:05PM -0700, Sukadev Bhattiprolu wrote:
> Would something liks this work?
>
Sure, that looks fine.
Thanks.
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Peter Zijlstra [pet...@infradead.org] wrote:
|
| Is there a down-side to always doing the txn based group read? If an
| arch does not implement the read txn support it'll fall back to doing
| independent read ops, but we end up doing those anyway.
|
| That way we get less special case code.
We c
On Wed, Mar 04, 2015 at 12:35:08AM -0800, Sukadev Bhattiprolu wrote:
> +++ b/kernel/events/core.c
> @@ -3677,11 +3677,34 @@ u64 perf_event_read_value(struct perf_event *event,
> u64 *enabled, u64 *running,
> }
> EXPORT_SYMBOL_GPL(perf_event_read_value);
>
> +static int do_pmu_group_read(struct
The 24x7 counters in Powerpc allow monitoring a large number of counters
simultaneously. They also allow reading several counters in a single
HCALL so we can get a more consistent snapshot of the system.
Use the PMU's transaction interface to monitor and read several event
counters at once. The id
