[lttng-dev] Beginner question: how to inspect scheduling of multi-threaded user application?

[David Aldrich]

Thank you, things are looking much better now.

David

> -----Original Message-----
> From: Jonathan Rajotte Julien [mailto:Jonathan.rajotte-julien at efficios.com]
> Sent: 15 September 2016 16:50
> To: David Aldrich <David.Aldrich at EMEA.NEC.COM>; lttng-
> dev at lists.lttng.org
> Subject: Re: [lttng-dev] Beginner question: how to inspect scheduling of
> multi-threaded user application?
> 
> Hi,
> 
> On 2016-09-15 11:41 AM, David Aldrich wrote:
> > Hi Jonathan
> >
> > Thanks, I had not logged out/in after joining the tracing group.
> >
> > I now see:
> >
> > $ lttng create demo_session
> > Session demo_session created.
> > $ sudo lttng enable-event -k sched_switch -s demo_session
> > Error: Event sched_switch: Kernel tracer not available (channel
> > channel0, session demo_session)
> > Warning: Some command(s) went wrong
> >
> > What do I need to install?
> 
> Did you have a look at http://lttng.org/download/#ubuntu ?
> 
> I recommend the use of the ppa if possible. For kernel tracing make sure to
> install the lttng-modules-dkms.
> 
> Make sure there is not error during the installation. It might happen but
> should not :) .
> 
> If it's not done already make sure to drop by http://lttng.org/docs/#doc-
> getting-started for more informations.
> 
> Cheers
> 
> >
> > Best regards
> >
> > David
> 
> --
> Jonathan R. Julien
> Efficios
> 
> 
> 
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