linux-kernel - Re: sched: trace: update trace_sched

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Message-ID: <20081216154748.GC6231@Krystal>
Date:	Tue, 16 Dec 2008 10:47:48 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Jason Baron <jbaron@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: sched: trace: update trace_sched_wakeup()

* Peter Zijlstra (peterz@...radead.org) wrote:
> On Tue, 2008-12-16 at 08:07 +0100, Peter Zijlstra wrote:
> > Add the information needed to distinguish 'real' wakeups from 'false'
> > wakeups.
> 
> I don't seem to be doing so well this morning...
> 
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> 
> Thanks Dhaval!
> 

Applied a modified version into the 2.6.27.9 LTTng tree. Thanks!
(remembering that I should really move to 2.6.28-rc!)

Mathieu

> > ---
> >  include/trace/sched.h             |    4 ++--
> >  kernel/sched.c                    |    2 +-
> >  kernel/trace/trace_sched_switch.c |    2 +-
> >  kernel/trace/trace_sched_wakeup.c |    2 +-
> >  4 files changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/include/trace/sched.h b/include/trace/sched.h
> > index 9b2854a..a0861d2 100644
> > --- a/include/trace/sched.h
> > +++ b/include/trace/sched.h
> > @@ -17,8 +17,8 @@ DECLARE_TRACE(sched_wait_task,
> >  		TPARGS(rq, p));
> >  
> >  DECLARE_TRACE(sched_wakeup,
> > -	TPPROTO(struct rq *rq, struct task_struct *p),
> > -		TPARGS(rq, p));
> > +	TPPROTO(struct rq *rq, struct task_struct *p, int success),
> > +		TPARGS(rq, p, success));
> >  
> >  DECLARE_TRACE(sched_wakeup_new,
> >  	TPPROTO(struct rq *rq, struct task_struct *p),
> > diff --git a/kernel/sched.c b/kernel/sched.c
> > index 0eff15b..953ded9 100644
> > --- a/kernel/sched.c
> > +++ b/kernel/sched.c
> > @@ -2329,7 +2329,7 @@ out_activate:
> >  	success = 1;
> >  
> >  out_running:
> > -	trace_sched_wakeup(rq, p);
> > +	trace_sched_wakeup(rq, p, success);
> >  	check_preempt_curr(rq, p, sync);
> >  
> >  	p->state = TASK_RUNNING;
> > diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
> > index 8633905..d4db564 100644
> > --- a/kernel/trace/trace_sched_switch.c
> > +++ b/kernel/trace/trace_sched_switch.c
> > @@ -49,7 +49,7 @@ probe_sched_switch(struct rq *__rq, struct task_struct *prev,
> >  }
> >  
> >  static void
> > -probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
> > +probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success)
> >  {
> >  	struct trace_array_cpu *data;
> >  	unsigned long flags;
> > diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
> > index 0067b49..43586b6 100644
> > --- a/kernel/trace/trace_sched_wakeup.c
> > +++ b/kernel/trace/trace_sched_wakeup.c
> > @@ -211,7 +211,7 @@ static void wakeup_reset(struct trace_array *tr)
> >  }
> >  
> >  static void
> > -probe_wakeup(struct rq *rq, struct task_struct *p)
> > +probe_wakeup(struct rq *rq, struct task_struct *p, int success)
> >  {
> >  	int cpu = smp_processor_id();
> >  	unsigned long flags;
> > 
> > --
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-- 
Mathieu Desnoyers
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