linux-kernel - Re: [PATCH 2/4] perf, tools: Implement duration

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Date:   Wed, 27 Mar 2019 06:54:39 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Andi Kleen <andi@...stfloor.org>, acme@...nel.org,
        jolsa@...nel.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 2/4] perf, tools: Implement duration_time as a proper
 event

> 
> so now that we have time in a separate event, we could
> get rid of the isolated update_stats(&walltime_nsecs_stats) calls
> and move them to perf_stat__update_shadow_stats?

In theory yes, but it would require perf stat always setting up
the duration_time event implicitely and then special handling.

For stat it would need to be hidden to keep the same output.

It's probably simpler to keep the old way for that.

-Andi