linux-kernel - Re: [RFC PATCH 1/1] perf arm64: Implement --topdown with metrics

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Message-ID: <4fefb1bc-49b2-bc5b-23cd-cd8fabe8c588@huawei.com>
Date:   Thu, 6 Jan 2022 18:24:26 +0000
From:   John Garry <john.garry@...wei.com>
To:     Andrew Kilroy <andrew.kilroy@....com>,
        Ian Rogers <irogers@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>
CC:     <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <acme@...nel.org>, Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        "Namhyung Kim" <namhyung@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 1/1] perf arm64: Implement --topdown with metrics

On 06/01/2022 16:33, Andrew Kilroy wrote:
> 
> Andi requested that the json metrics be disabled on x86 in
> 
> 
> https://lore.kernel.org/linux-perf-users/12e0deef-08db-445f-4958-bcd5c3e10367@linux.intel.com/#t 
> 
> 
> If we do that, do you still think the --topdown=<arg>  modification is 
> needed? 

Probably not. I assumed that the metricgroup solution could work for x86 
also, so now no need for this option.

> I guess it would have to report an error if someone requests 
> --topdown=json-metrics on x86.
> 

Thanks,
John