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Message-Id: <1672745976-2800146-6-git-send-email-renyu.zj@linux.alibaba.com>
Date: Tue, 3 Jan 2023 19:39:35 +0800
From: Jing Zhang <renyu.zj@...ux.alibaba.com>
To: John Garry <john.g.garry@...cle.com>,
Ian Rogers <irogers@...gle.com>,
Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
Will Deacon <will@...nel.org>,
James Clark <james.clark@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
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>,
Andrew Kilroy <andrew.kilroy@....com>,
Shuai Xue <xueshuai@...ux.alibaba.com>,
Zhuo Song <zhuo.song@...ux.alibaba.com>,
Jing Zhang <renyu.zj@...ux.alibaba.com>
Subject: [PATCH v5 5/6] perf vendor events arm64: Add PE utilization metrics for neoverse-n2
Add PE utilization related metrics. In cpu_utilization metric, stall_slot
minus cpu_cycles is a correction to the stall_slot error count.
Signed-off-by: Jing Zhang <renyu.zj@...ux.alibaba.com>
Acked-by: Ian Rogers <irogers@...gle.com>
---
.../arch/arm64/arm/neoverse-n2/metrics.json | 46 ++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json
index 35e3710..94ca91f 100644
--- a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json
+++ b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json
@@ -173,5 +173,51 @@
"MetricGroup": "Branch",
"MetricName": "branch_miss_pred_rate",
"ScaleUnit": "100%"
+ },
+ {
+ "MetricExpr": "instructions / CPU_CYCLES",
+ "BriefDescription": "The average number of instructions executed for each cycle.",
+ "MetricGroup": "PEutilization",
+ "MetricName": "ipc"
+ },
+ {
+ "MetricExpr": "ipc / 5",
+ "BriefDescription": "IPC percentage of peak. The peak of IPC is 5.",
+ "MetricGroup": "PEutilization",
+ "MetricName": "ipc_rate",
+ "ScaleUnit": "100%"
+ },
+ {
+ "MetricExpr": "INST_RETIRED / CPU_CYCLES",
+ "BriefDescription": "Architecturally executed Instructions Per Cycle (IPC)",
+ "MetricGroup": "PEutilization",
+ "MetricName": "retired_ipc"
+ },
+ {
+ "MetricExpr": "INST_SPEC / CPU_CYCLES",
+ "BriefDescription": "Speculatively executed Instructions Per Cycle (IPC)",
+ "MetricGroup": "PEutilization",
+ "MetricName": "spec_ipc"
+ },
+ {
+ "MetricExpr": "OP_RETIRED / OP_SPEC",
+ "BriefDescription": "Of all the micro-operations issued, what percentage are retired(committed)",
+ "MetricGroup": "PEutilization",
+ "MetricName": "retired_rate",
+ "ScaleUnit": "100%"
+ },
+ {
+ "MetricExpr": "1 - OP_RETIRED / OP_SPEC",
+ "BriefDescription": "Of all the micro-operations issued, what percentage are not retired(committed)",
+ "MetricGroup": "PEutilization",
+ "MetricName": "wasted_rate",
+ "ScaleUnit": "100%"
+ },
+ {
+ "MetricExpr": "OP_RETIRED / OP_SPEC * (1 - (STALL_SLOT - CPU_CYCLES) / (CPU_CYCLES * 5))",
+ "BriefDescription": "The truly effective ratio of micro-operations executed by the CPU, which means that misprediction and stall are not included",
+ "MetricGroup": "PEutilization",
+ "MetricName": "cpu_utilization",
+ "ScaleUnit": "100%"
}
]
--
1.8.3.1
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