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Message-ID: <abebb42b-62c1-30d7-ad9a-5fbf6c0edce1@oracle.com>
Date: Mon, 21 Nov 2022 10:22:01 +0000
From: John Garry <john.g.garry@...cle.com>
To: Jing Zhang <renyu.zj@...ux.alibaba.com>,
linux-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
John Garry <john.garry@...wei.com>,
Will Deacon <will@...nel.org>,
James Clark <james.clark@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>, Ian Rogers <irogers@...gle.com>
Cc: 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>
Subject: Re: [External] : [RFC PATCH v2 1/6] perf vendor events arm64: Add
topdown L1 metrics for neoverse-n2
>
>
> #./perf stat -e FRONTEND_BOUND sleep 1
> event syntax error: 'FRONTEND_BOUND'
For metrics, use -M, not -e
If this doesn't help, verify generated pmu-events/pmu-events.c is same
after you make the change to try to use std arch events for metrics.
Note that I never tested running my change.
Thanks,
John
> \___ parser error
> Run 'perf list' for a list of valid events
>
> Usage: perf stat [<options>] [<command>]
>
> -e, --event <event> event selector. use 'perf list' to list available events
>
>
>
> diff --git a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/pipeline.json b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/pipeli
> index f9fae15..1089ca0 100644
> --- a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/pipeline.json
> +++ b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/pipeline.json
> @@ -6,18 +6,24 @@
> "ArchStdEvent": "STALL_BACKEND"
> },
> {
> - "ArchStdEvent": "STALL_SLOT_FRONTEND"
> + "ArchStdEvent": "STALL_SLOT_FRONTEND",
> + "MetricExpr": "STALL_SLOT_FRONTEND - CPU_CYCLES"
> },
> {
>
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