Messages in this thread | | | Date | Tue, 10 Jul 2018 15:31:06 +0100 | From | Will Deacon <> | Subject | Re: [PATCH v5 0/7] arm64: perf: Support for chained counters |
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Hi Suzuki,
On Tue, Jul 10, 2018 at 09:57:57AM +0100, Suzuki K Poulose wrote: > This series adds support for counting PMU events using 64bit counters > for arm64 PMU. > > The Arm v8 PMUv3 supports combining two adjacent 32bit counters > (low even and hig odd counters) to count a given "event" in 64bit mode. > This series adds the support for 64bit events in the core arm_pmu driver > infrastructure and adds the support for armv8 64bit kernel PMU to use > chained counters to count in 64bit mode. For CPU cycles, we use the cycle > counter in 64bit mode, only when requested. If the cycle counter is not > available, we fall back to chaining the counters. > > Tested on Juno, Fast models. Applies on 4.18-rc4
Thanks, this looks pretty good to me. How far did you get with the perf fuzzer?
Will
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