Re: [PATCH 01/10] perf tools: Uniquify the event name if there's no other matched event
From: Andi Kleen
Date: Wed Jun 06 2018 - 19:19:08 EST
On Thu, Jun 07, 2018 at 12:15:04AM +0200, Jiri Olsa wrote:
> Currently by default we try to match the user specified PMU
> name to all PMU units available and use them to aggregate
> all matched PMUs event counts into one 'pattern' event.
>
> While this is useful for uncore events, it screws up names
> for other events, where this is not desirable, like:
>
> Before:
> # perf stat -e cp/cpu-cycles/ kill
I assume you mean cpU/cpu-cycles/
>
> Performance counter stats for 'kill':
>
> 1,573,757 cp/cpu-cycles/
>
> Keeping the pattern matching logic, but making the name unique
> in case there's no other match found. That fixes the example
> above and hopefully does not screw up anything else.
>
> After:
> # perf stat -e cp/cpu-cycles/ kill
>
> Performance counter stats for 'kill':
>
> 1,573,757 cpu/cpu-cycles/
The output is 100% identical?
-Andi