linux-kernel - Re: [PATCH v3 3/7] perf vendor events: Add JSON metrics for CMN

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Message-ID: <a31c7578-93fe-193e-1c4b-fa8fa187f5dd@linux.alibaba.com>
Date:   Wed, 31 May 2023 10:43:36 +0800
From:   Shuai Xue <xueshuai@...ux.alibaba.com>
To:     Jing Zhang <renyu.zj@...ux.alibaba.com>,
        John Garry <john.g.garry@...cle.com>,
        Ian Rogers <irogers@...gle.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Ilkka Koskinen <ilkka@...amperecomputing.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-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org,
        Zhuo Song <zhuo.song@...ux.alibaba.com>
Subject: Re: [PATCH v3 3/7] perf vendor events: Add JSON metrics for CMN



On 2023/5/30 17:19, Jing Zhang wrote:
> Add JSON metrics for arm CMN. Currently just add part of CMN PMU
> metrics which are general and compatible for any SoC and CMN-ANY.

Is it a typo? You mean "any SoC integration with CMN-ANY" right?

Thanks,
Shuai

> 
> Signed-off-by: Jing Zhang <renyu.zj@...ux.alibaba.com>
> ---
>  .../pmu-events/arch/arm64/arm/cmn/sys/metrics.json | 74 ++++++++++++++++++++++
>  tools/perf/pmu-events/jevents.py                   |  1 +
>  2 files changed, 75 insertions(+)
>  create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
> 
> diff --git a/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
> new file mode 100644
> index 0000000..e70ac1a
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metrics.json
> @@ -0,0 +1,74 @@
> +[
> +	{
> +		"MetricName": "slc_miss_rate",
> +		"BriefDescription": "The system level cache miss rate include.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "hnf_cache_miss / hnf_slc_sf_cache_access",
> +		"ScaleUnit": "100%",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "hnf_message_retry_rate",
> +		"BriefDescription": "HN-F message retry rate indicates whether a lack of credits is causing the bottlenecks.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "hnf_pocq_retry / hnf_pocq_reqs_recvd",
> +		"ScaleUnit": "100%",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "sf_hit_rate",
> +		"BriefDescription": "Snoop filter hit rate can be used to measure the Snoop Filter efficiency.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "hnf_sf_hit / hnf_slc_sf_cache_access",
> +		"ScaleUnit": "100%",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "mc_message_retry_rate",
> +		"BriefDescription": "The memory controller request retries rate indicates whether the memory controller is the bottleneck.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "hnf_mc_retries / hnf_mc_reqs",
> +		"ScaleUnit": "100%",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "rni_actual_read_bandwidth.all",
> +		"BriefDescription": "This event measure the actual bandwidth(MB/sec) that RN-I bridge sends to the interconnect.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "rnid_rxdat_flits * 32 / 1e6 / duration_time",
> +		"ScaleUnit": "1MB/s",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "rni_actual_write_bandwidth.all",
> +		"BriefDescription": "This event measures the actual write bandwidth(MB/sec) at RN-I bridges.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "rnid_txdat_flits * 32 / 1e6 / duration_time",
> +		"ScaleUnit": "1MB/s",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "rni_retry_rate",
> +		"BriefDescription": "RN-I bridge retry rate indicates whether the memory controller is the bottleneck.",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "rnid_txreq_flits_retried / rnid_txreq_flits_total",
> +		"ScaleUnit": "100%",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	},
> +	{
> +		"MetricName": "sbsx_actual_write_bandwidth.all",
> +		"BriefDescription": "sbsx actual write bandwidth(MB/sec).",
> +		"MetricGroup": "arm_cmn",
> +		"MetricExpr": "sbsx_txdat_flitv * 32 / 1e6 / duration_time",
> +		"ScaleUnit": "1MB/s",
> +		"Unit": "arm_cmn",
> +		"Compat": "arm_cmn600;arm_cmn650;arm_cmn700;arm_ci700"
> +	}
> +]
> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
> index 2bcd07c..7cff2c6 100755
> --- a/tools/perf/pmu-events/jevents.py
> +++ b/tools/perf/pmu-events/jevents.py
> @@ -256,6 +256,7 @@ class JsonEvent:
>            'DFPMC': 'amd_df',
>            'cpu_core': 'cpu_core',
>            'cpu_atom': 'cpu_atom',
> +          'arm_cmn': 'arm_cmn',
>        }
>        return table[unit] if unit in table else f'uncore_{unit.lower()}'
>