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

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Date: Thu, 29 Feb 2024 16:30:12 -0500
From: "Liang, Kan" <kan.liang@...ux.intel.com>
To: Ian Rogers <irogers@...gle.com>, Perry Taylor <perry.taylor@...el.com>,
 Samantha Alt <samantha.alt@...el.com>,
 Caleb Biggers <caleb.biggers@...el.com>, Weilin Wang
 <weilin.wang@...el.com>, Edward Baker <edward.baker@...el.com>,
 Andi Kleen <ak@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>,
 Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 John Garry <john.g.garry@...cle.com>, Jing Zhang
 <renyu.zj@...ux.alibaba.com>, Thomas Richter <tmricht@...ux.ibm.com>,
 James Clark <james.clark@....com>, linux-kernel@...r.kernel.org,
 linux-perf-users@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v1 13/20] perf jevents: Add cycles breakdown metric for
 Intel



On 2024-02-28 7:17 p.m., Ian Rogers wrote:
> Breakdown cycles to user, kernel and guest.
> 
> Signed-off-by: Ian Rogers <irogers@...gle.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(),