Messages in this thread | | | Date | Tue, 17 Jan 2023 08:45:05 +0000 | Subject | Re: [PATCH v8 1/9] perf pmu: Add #slots literal support for arm64 | From | John Garry <> |
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On 17/01/2023 07:29, Jing Zhang wrote: > The slots in each architecture may be different, so add #slots literal > to obtain the slots of different architectures, and the #slots can be > applied in the metric. Currently, The #slots just support for arm64, > and other architectures will return NAN. > > On arm64, the value of slots is from the register PMMIR_EL1.SLOT, which > I can read in /sys/bus/event_source/device/armv8_pmuv3_*/caps/slots. > PMMIR_EL1.SLOT might read as zero if the PMU version is lower than > ID_AA64DFR0_EL1_PMUVer_V3P4 or the STALL_SLOT event is not implemented. > > Signed-off-by: Jing Zhang<renyu.zj@linux.alibaba.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
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