Re: [PATCH V1 3/4] perf vendor events: Add JSON metrics for imx8mq DDR Perf
From: John Garry <hidden>
Date: 2021-01-19 10:42:54
Also in:
linux-arm-kernel
On 19/01/2021 02:56, Joakim Zhang wrote:
quoted hunk ↗ jump to hunk
index 000000000000..c3e9f89a4a4d--- /dev/null +++ b/tools/perf/pmu-events/arch/arm64/freescale/imx8mq/sys/metrics.json@@ -0,0 +1,26 @@ +[ + { + "BriefDescription": "bandwidth usage for lpddr4 evk board",
Why mention the evk board specifically? Is this metric only specific to that board, and not all i.MX8MQ platforms? Thanks, John
+ "MetricName": "imx8mq_bandwidth_usage.lpddr4", + "MetricExpr": "(( imx8_ddr0@read\\-cycles@ + imx8_ddr0@write\\-cycles@ ) * 4 * 4 / duration_time) / (800 * 1000000 * 4 * 4)", + "ScaleUnit": "1e2%", + "Unit": "imx8_ddr", + "Compat": "i.MX8MQ" + },