Messages in this thread | | | Date | Mon, 17 Nov 2014 11:24:47 +0000 | From | Will Deacon <> | Subject | Re: [PATCH 00/11] arm: perf: add support for heterogeneous PMUs |
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On Fri, Nov 07, 2014 at 04:25:25PM +0000, Mark Rutland wrote: > In systems with heterogeneous CPUs (e.g. big.LITTLE) the associated PMUs > also differ in terms of the supported set of events, the precise > behaviour of each of those events, and the number of event counters. > Thus it is not possible to expose these PMUs as a single logical PMU. > > Instead a logical PMU is created per CPU microarchitecture, which events > can target directly: > > $ perf stat \ > -e armv7_cortex_a7/config=0x11/ \ > -e armv7_cortex_a15/config=0x11/ \ > ./test > > Performance counter stats for './test': > > 7980455 armv7_cortex_a7/config=0x11/ [27.29%] > 9947934 armv7_cortex_a15/config=0x11/ [72.66%] > > 0.016734833 seconds time elapsed > > This series is based atop of my recent preparatory rework [1,2].
Modulo the patches I commented on, the ARM perf bits look fine to me. For those:
Acked-by: Will Deacon <will.deacon@arm.com>
However, you need to get the event_filter_match change into the core code before I can queue anything.
Will
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