Re: [PATCH v1 13/20] perf jevents: Add cycles breakdown metric for Intel

Liang, Kan
2024-02-29T21:30:18Z

On 2024-02-28 7:17 p.m., Ian Rogers wrote:
> Breakdown cycles to user, kernel and guest.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/pmu-events/intel_metrics.py | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
> index dae44d296861..fef40969a4b8 100755
> --- a/tools/perf/pmu-events/intel_metrics.py
> +++ b/tools/perf/pmu-events/intel_metrics.py
> @@ -26,6 +26,23 @@ core_cycles = Event("CPU_CLK_UNHALTED.THREAD_P_ANY",
> smt_cycles = Select(core_cycles / 2, Literal("#smt_on"), core_cycles)
>
>
> +def Cycles() -> MetricGroup:
> + cyc_k = Event("cycles:kHh")
> + cyc_g = Event("cycles:G")
> + cyc_u = Event("cycles:uH")
> + cyc = cyc_k + cyc_g + cyc_u
> +
> + return MetricGroup("cycles", [
> + Metric("cycles_total", "Total number of cycles", cyc, "cycles"),
> + Metric("cycles_user", "User cycles as a percentage of all cycles",
> + d_ratio(cyc_u, cyc), "100%"),
> + Metric("cycles_kernel", "Kernel cycles as a percentage of all cycles",
> + d_ratio(cyc_k, cyc), "100%"),
> + Metric("cycles_guest", "Hypervisor guest cycles as a percentage of all cycles",
> + d_ratio(cyc_g, cyc), "100%"),
> + ], description = "cycles breakdown per privilege level (users, kernel, guest)")
> +
> +
> def Idle() -> Metric:
> cyc = Event("msr/mperf/")
> tsc = Event("msr/tsc/")
> @@ -770,6 +787,7 @@ def IntelLdSt() -> Optional[MetricGroup]:
>
>
> all_metrics = MetricGroup("", [
> + Cycles(),

The metric group seem exactly the same on AMD and ARM. Maybe we can have
tools/perf/pmu-events/common_metrics.py for all the common metrics.

Thanks,
Kan

> Idle(),
> Rapl(),
> Smi(),