Re: [PATCH 2/6] perf stat: Fix metrics calculation with event qualifiers

[Namhyung Kim]

Hi Jiri and Andi,

On Tue, Apr 07, 2015 at 11:25:15PM +0200, Jiri Olsa wrote:
> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> 
> Currently in perf IPC and other metrics cannot be directly shown
> separately for both user and kernel in a single run. The problem was
> that the metrics matching code did not check event qualifiers.
> 
> With this patch the following case works correctly.
> 
> % perf stat -e cycles:k,cycles:u,instructions:k,instructions:u true
> 
>  Performance counter stats for 'true':
> 
>            531,718      cycles:k
>            203,895      cycles:u
>            338,151      instructions:k            #    0.64  insns per cycle
>            105,961      instructions:u            #    0.52  insns per cycle
> 
>        0.002989739 seconds time elapsed
> 
> Previously it would misreport the ratios because they were matching
> the wrong value.

This patch reminds me of following change: