Re: [PATCH] perf, tools: Fix adding multiple event groups

[Jiri Olsa]

On Thu, Sep 14, 2017 at 01:57:35PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> 
> The -M metric group parser threw away the events of earlier
> groups when multiple groups were specified. Fix this here
> by not overwriting the string incorrectly.
> 
> Now this works correctly:
> 
> % perf stat -M Summary,SMT --metric-only -a sleep 1
> 
>  Performance counter stats for 'system wide':
> 
> Instructions         CPI                  CLKS                 CPU_Utilization      GFLOPs               SMT_2T_Utilization   SMT_2T_Utilization   Kernel_Utilization   CoreIPC              CORE_CLKS
> 900907376.0              2.7            2398954144.0             0.1                 0.0                 0.2                 0.2                 0.1                 0.4            2080822855.5
> 
> while previously it would only show the SMT metrics.
> 
> Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>

thanks,
jirka