linux-kernel - Re: [RFC] perf/core: what is exclude

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Message-ID: <alpine.DEB.2.21.1804181109100.1587@macbook-air>
Date:   Wed, 18 Apr 2018 11:10:20 -0400 (EDT)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     Jiri Olsa <jolsa@...hat.com>
cc:     Stephane Eranian <eranian@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>, mingo@...e.hu,
        Andi Kleen <ak@...ux.intel.com>,
        Vince Weaver <vincent.weaver@...ne.edu>
Subject: Re: [RFC] perf/core: what is exclude_idle supposed to do

On Tue, 17 Apr 2018, Jiri Olsa wrote:

> On Mon, Apr 16, 2018 at 10:04:53PM +0000, Stephane Eranian wrote:
> > Hi,
> > 
> > I am trying to understand what the exclude_idle event attribute is supposed
> > to accomplish.
> > As per the definition in the header file:
> > 
> >     exclude_idle   :  1, /* don't count when idle */
> 
> AFAICS it's not implemented

so just to be completely clear hear, we're saying that the "exclude_idle" 
modifier has never done anything useful and still doesn't?

If so I should update the perf_event_open manpage to spell this out.

Vince