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From: "Paul E. McKenney" <paulmck@linux.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	linux-kernel@vger.kernel.org, andrea.parri@amarulasolutions.com
Subject: Re: Question about sched_setaffinity()
Date: Wed, 1 May 2019 13:27:13 -0700	[thread overview]
Message-ID: <20190501202713.GY3923@linux.ibm.com> (raw)
In-Reply-To: <20190501151655.51469a4c@gandalf.local.home>

On Wed, May 01, 2019 at 03:16:55PM -0400, Steven Rostedt wrote:
> On Wed, 1 May 2019 12:12:13 -0700
> "Paul E. McKenney" <paulmck@linux.ibm.com> wrote:
> 
> 
> > OK, what I did was to apply the patch at the end of this email to -rcu
> > branch dev, then run rcutorture as follows:
> > 
> > nohup tools/testing/selftests/rcutorture/bin/kvm.sh --cpus 8 --duration 2 --configs "TRIVIAL" --bootargs "trace_event=sched:sched_switch,sched:sched_wakeup ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop"
> > 
> > This resulted in the console output that I placed here:
> > 
> > http://www2.rdrop.com/~paulmck/submission/console.log.gz
> > 
> > But I don't see calls to sched_setaffinity() or migration_cpu_stop().
> > Steve, is something else needed on the kernel command line in addition to
> > the following?
> > 
> > ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
> 
> Do you have function graph enabled in the config?
> 
> [    2.098303] ftrace bootup tracer 'function_graph' not registered.

I guess I don't!  Thank you, will fix.

Let's see...

My .config has CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y.  It looks like I
need CONFIG_FUNCTION_GRAPH_TRACER=y, which I don't have.  And it looks
like that needs CONFIG_FUNCTION_TRACER=y, which I also don't have.
But I do have CONFIG_HAVE_FUNCTION_TRACER=y.  So I should add this
to my rcutorture command line:

--kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y".

I fired this up.  Here is hoping!  ;-)

And it does have sched_setaffinity(), woo-hoo!!!  I overwrote the old file:

	http://www2.rdrop.com/~paulmck/submission/console.log.gz

							Thanx, Paul


  reply	other threads:[~2019-05-01 20:27 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-27 18:02 Paul E. McKenney
2019-04-30 10:03 ` Peter Zijlstra
2019-04-30 10:51   ` Paul E. McKenney
2019-04-30 11:55     ` Peter Zijlstra
2019-05-01 19:12       ` Paul E. McKenney
2019-05-01 19:16         ` Steven Rostedt
2019-05-01 20:27           ` Paul E. McKenney [this message]
2019-05-07 22:16             ` Paul E. McKenney
2019-05-09 17:36               ` Paul E. McKenney
2019-05-09 19:36                 ` Paul E. McKenney
2019-05-10 12:08                   ` Peter Zijlstra
2019-05-10 23:07                     ` Paul E. McKenney
2019-05-11 21:45                       ` Andrea Parri
2019-05-12  0:39                         ` Paul E. McKenney
2019-05-12  1:05                           ` Andrea Parri
2019-05-13 12:20                             ` Paul E. McKenney
2019-05-13 15:37                               ` Joel Fernandes
2019-05-13 15:53                                 ` Paul E. McKenney
2019-05-13  8:10                       ` Peter Zijlstra
2019-05-13 12:19                         ` Paul E. McKenney
2019-05-09 21:40                 ` Andrea Parri
2019-05-09 21:56                   ` Andrea Parri
2019-05-09 22:17                     ` Paul E. McKenney
2019-05-10  6:32                       ` Andrea Parri

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