linux-kernel - Re: [PATCH v8 8/8] perf vendor events arm64:: Add i.MX93 DDR Performance Monitor metrics

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Date: Tue, 26 Mar 2024 10:57:27 -0400
From: Frank Li <Frank.li@....com>
To: Xu Yang <xu.yang_2@....com>
Cc: will@...nel.org, mark.rutland@....com, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
	festevam@...il.com, john.g.garry@...cle.com, jolsa@...nel.org,
	namhyung@...nel.org, irogers@...gle.com, mike.leach@...aro.org,
	peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	alexander.shishkin@...ux.intel.com, adrian.hunter@...el.com,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
	imx@...ts.linux.dev
Subject: Re: [PATCH v8 8/8] perf vendor events arm64:: Add i.MX93 DDR
 Performance Monitor metrics

On Fri, Mar 22, 2024 at 02:39:30PM +0800, Xu Yang wrote:
> Add JSON metrics for i.MX93 DDR Performance Monitor.
> 
> Signed-off-by: Xu Yang <xu.yang_2@....com>

Reviewed-by: Frank Li <Frank.Li@....com>

> 
> ---
> Changes in v7:
>  - new patch
> Changes in v8:
>  - no changes
> ---
>  .../arch/arm64/freescale/imx93/sys/ddrc.json  |  9 +++++++
>  .../arm64/freescale/imx93/sys/metrics.json    | 26 +++++++++++++++++++
>  2 files changed, 35 insertions(+)
>  create mode 100644 tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/ddrc.json
>  create mode 100644 tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/metrics.json
> 
> diff --git a/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/ddrc.json b/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/ddrc.json
> new file mode 100644
> index 000000000000..eeeae4d49fce
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/ddrc.json
> @@ -0,0 +1,9 @@
> +[
> +   {
> +           "BriefDescription": "ddr cycles event",
> +           "EventCode": "0x00",
> +           "EventName": "imx93_ddr.cycles",
> +           "Unit": "imx9_ddr",
> +           "Compat": "imx93"
> +   }
> +]
> diff --git a/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/metrics.json b/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/metrics.json
> new file mode 100644
> index 000000000000..4d2454ca1259
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/arm64/freescale/imx93/sys/metrics.json
> @@ -0,0 +1,26 @@
> +[
> +   {
> +	    "BriefDescription": "bandwidth usage for lpddr4x evk board",
> +	    "MetricName": "imx93_bandwidth_usage.lpddr4x",
> +	    "MetricExpr": "(((( imx9_ddr0@...c_pm_0@ ) * 2 * 8 ) + (( imx9_ddr0@...c_pm_3@ + imx9_ddr0@...c_pm_5@ + imx9_ddr0@...c_pm_7@ + imx9_ddr0@...c_pm_9@ - imx9_ddr0@...c_pm_2@ - imx9_ddr0@...c_pm_4@ - imx9_ddr0@...c_pm_6@ - imx9_ddr0@...c_pm_8@ ) * 32 )) / duration_time) / (3733 * 1000000 * 2)",
> +	    "ScaleUnit": "1e2%",
> +	    "Unit": "imx9_ddr",
> +	    "Compat": "imx93"
> +   },
> +   {
> +	    "BriefDescription": "bytes all masters read from ddr",
> +	    "MetricName": "imx93_ddr_read.all",
> +	    "MetricExpr": "( imx9_ddr0@...c_pm_0@ ) * 2 * 8",
> +	    "ScaleUnit": "9.765625e-4KB",
> +	    "Unit": "imx9_ddr",
> +	    "Compat": "imx93"
> +   },
> +   {
> +	    "BriefDescription": "bytes all masters write to ddr",
> +	    "MetricName": "imx93_ddr_write.all",
> +	    "MetricExpr": "( imx9_ddr0@...c_pm_3@ + imx9_ddr0@...c_pm_5@ + imx9_ddr0@...c_pm_7@ + imx9_ddr0@...c_pm_9@ - imx9_ddr0@...c_pm_2@ - imx9_ddr0@...c_pm_4@ - imx9_ddr0@...c_pm_6@ - imx9_ddr0@...c_pm_8@ ) * 32",
> +	    "ScaleUnit": "9.765625e-4KB",
> +	    "Unit": "imx9_ddr",
> +	    "Compat": "imx93"
> +   }
> +]
> -- 
> 2.34.1
>