linux-kernel - Re: [PATCH v3 06/11] perf, tools, stat: Support JSON metrics in perf stat

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Date:   Mon, 11 Sep 2017 11:05:01 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Andi Kleen <andi@...stfloor.org>, jolsa@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 06/11] perf, tools, stat: Support JSON metrics in perf
 stat

Em Fri, Sep 08, 2017 at 12:08:48PM -0700, Andi Kleen escreveu:
> > > PERF_CPUID=GenuineIntel-...
> > > 
> > > See the mapfile.csv for valid codes
> > > 
> > > But it's quite a few.
> > 
> > yeah, I'm testing on the ones I have access and on a Skylake machine I'm having
> > trouble, see below.
> > [root@...enth ~]# perf stat -vv --metric-only -M Summary -a sleep 1
> 
> The problem is that your kernel is missing the msr// PMU.
> 
> It should work with a newer kernel.

Yes:

[root@...enth ~]# uname -r
4.12.0-rc6+
[root@...enth ~]# perf stat --metric-only -M Summary -a sleep 1 

 Performance counter stats for 'system wide':

Instructions         CPI                  CLKS                 CPU_Utilization      GFLOPs               SMT_2T_Utilization   Kernel_Utilization   
34021097.0               0.0            119424171.0              0.0                 0.0                 0.0                 0.0            

       1.001001793 seconds time elapsed

[root@...enth ~]#
 
> I can look at better error messages.

Please do,

Thanks!

- Arnaldo