linux-kernel - Re: [PATCH v2 00/11] perf metric fixes and test

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Date:   Thu, 23 Apr 2020 16:02:49 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     "Jin, Yao" <yao.jin@...ux.intel.com>
Cc:     Ian Rogers <irogers@...gle.com>,
        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>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Haiyan Song <haiyanx.song@...el.com>,
        Song Liu <songliubraving@...com>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        Leo Yan <leo.yan@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Paul Clarke <pc@...ibm.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 00/11] perf metric fixes and test

On Thu, Apr 23, 2020 at 09:44:24PM +0800, Jin, Yao wrote:
> Hi Jiri,
> 
> On 4/23/2020 7:28 PM, Jiri Olsa wrote:
> > On Wed, Apr 22, 2020 at 03:04:19PM -0700, Ian Rogers wrote:
> > > Add a test that all perf metrics (for your architecture) are
> > > parsable. Fix bugs in the expr parser and in x86 metrics. Untested on
> > > architectures other than x86.
> > > 
> > > v2 adds Fixes tags to commit messages for when broken metrics were
> > >    first added. Adds a debug warning for division by zero in expr, and
> > >    adds a workaround for id values in the expr test necessary for
> > >    powerpc. It also fixes broken power8 and power9 metrics.
> > 
> > looks good to me
> > 
> > Jin Yao, is there a metric that's not working for you with this patchset
> > applied?
> > 
> > thanks,
> > jirka
> > 
> 
> Let me look for a CLX for testing, but maybe need some time.
> 
> BTW, suppose this patchset can work well, does it mean we will change the
> json file format in future?
> 
> For example,
> 
> before:
> cha@...nt\\=0x36\\\\\\
> 
> after:
> cha@...nt\\=0x36\\
> 
> "\\\\" are removed.
> 
> If so, we need to change our event generation script.

ok, maybe I got the wrong idea that the extra \\\\ were just
superfluous, what was the actual error there? and what's the
reason for that many '\' in there?

jirka