linux-kernel - Re: [PATCH v2 1/3] perf vendor events intel: Fix broadwellde tma_info_system_dram_bw

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Date:   Wed, 27 Sep 2023 09:47:31 -0400
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     Ian Rogers <irogers@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Perry Taylor <perry.taylor@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>
Subject: Re: [PATCH v2 1/3] perf vendor events intel: Fix broadwellde
 tma_info_system_dram_bw_use metric



On 2023-09-26 4:59 p.m., Ian Rogers wrote:
> Broadwell-de has a consumer core and server uncore. The uncore_arb PMU
> isn't present and the broadwellx style cbox PMU should be used
> instead. Fix the tma_info_system_dram_bw_use metric to use the server
> metric rather than client.
> 
> The associated converter script fix is in:
> https://github.com/intel/perfmon/pull/111
> 
> Fixes: 7d124303d620 ("perf vendor events intel: Update broadwell variant events/metrics")
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---

Thanks Ian. The whole patch series looks good to me.

Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>

Thanks,
Kan

>  tools/perf/pmu-events/arch/x86/broadwellde/bdwde-metrics.json | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/pmu-events/arch/x86/broadwellde/bdwde-metrics.json b/tools/perf/pmu-events/arch/x86/broadwellde/bdwde-metrics.json
> index 8fc62b8f667d..d0ef46c9bb61 100644
> --- a/tools/perf/pmu-events/arch/x86/broadwellde/bdwde-metrics.json
> +++ b/tools/perf/pmu-events/arch/x86/broadwellde/bdwde-metrics.json
> @@ -652,7 +652,7 @@
>      },
>      {
>          "BriefDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]",
> -        "MetricExpr": "64 * (arb@...nt\\=0x81\\,umask\\=0x1@ + arb@...nt\\=0x84\\,umask\\=0x1@) / 1e6 / duration_time / 1e3",
> +        "MetricExpr": "64 * (UNC_M_CAS_COUNT.RD + UNC_M_CAS_COUNT.WR) / 1e9 / duration_time",
>          "MetricGroup": "HPC;Mem;MemoryBW;SoC;tma_issueBW",
>          "MetricName": "tma_info_system_dram_bw_use",
>          "PublicDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]. Related metrics: tma_fb_full, tma_mem_bandwidth, tma_sq_full"