[External] : [RFC PATCH v2 1/6] perf vendor events arm64: Add topdown L1 metrics for neoverse-n2

[John Garry]

> 
> 
> #./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"
>       },
>       {
>