linux-kernel - Re: [RFC PATCH 2/5] sched/events: Introduce cfs

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Message-ID: <20170328104755.4f03a68e@gandalf.local.home>
Date:   Tue, 28 Mar 2017 10:47:55 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Dietmar Eggemann <dietmar.eggemann@....com>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@....com>,
        Patrick Bellasi <patrick.bellasi@....com>
Subject: Re: [RFC PATCH 2/5] sched/events: Introduce cfs_rq load tracking
 trace event

On Tue, 28 Mar 2017 10:00:50 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> On Tue, Mar 28, 2017 at 07:35:38AM +0100, Dietmar Eggemann wrote:
> >  
> > +	if (cfs_rq)
> > +		trace_sched_load_cfs_rq(cfs_rq);  
> 
> You can do that with DEFINE_EVENT_CONDITION and TP_CONDITION.

I just read this after I replied about using TRACE_EVENT_CONDITION. As
there is not a DEFINE_EVENT(), the TRACE_EVENT_CONDITION() should be
used. All the locations expect cfs_rq to not be NULL I assume.

-- Steve