Re: [diamon-discuss] Diamon Meeting on Tuesday February 9th, 2016, at 11h EDT (15h UTC)

[Julien Desfossez <jdesfossez@efficios.com>]

Mike confirmed to me that the recording did not work, so I am annotating
the slides to add a little bit more context and I will send them very
soon.

Julien

On 16-Feb-2016 09:15:28 PM, Mathieu Desnoyers wrote:
> Hi Martin,
> 
> We are trying to clarify with Mike Dolan whether the recording
> feature of the conference system was working or not during the
> call. As far as I can see, it did not appear to have worked,
> even though the option was enabled in the conference system. :-(
> 
> Thanks,
> 
> Mathieu
> 
> ----- On Feb 4, 2016, at 4:31 AM, Oberhuber, Martin Martin.Oberhuber@windriver.com wrote:
> 
> > Hi Mathieu,
> > 
> > This looks like a very interesting approach and I've read the Blog,
> > but unfortunately I can't make the 9th.
> > 
> > I don't think I would have much to contribute, but I am certainly
> > interested in what others say. Could the session be recorded, or
> > meeting notes posted? - Otherwise I'd be available from the 15th on,
> > in case you'd consider moving the session.
> > 
> > Two questions came up for me when reading the blog,
> > 
> > 1. Julien writes  "We are not trying to solve a problem related to the
> > interrupts
> >   being masked for too long (ftrace already has some tools to help with that)."
> >   Which are those tools? Any pointer would be appreciated.
> > 
> > 2. I really like the general usefulness of the latency_tracker and the many
> > clever
> >    ways it can be configured / leveraged - but it feels like an expert tool to me,
> >    where you'd very clearly have to know what you're doing. Are there any ideas
> >    making such expert tools more usable and discoverable by general users ?
> > 
> > Many thanks,
> > Martin
> > --
> > Martin Oberhuber, SMTS / Product Owner - Development Tools, Wind River
> > direct +43.662.457915.85  fax +43.662.457915.6
> > 
> > 
> > -----Original Message-----
> > From: diamon-discuss-bounces@lists.linuxfoundation.org
> > [mailto:diamon-discuss-bounces@lists.linuxfoundation.org] On Behalf Of Mathieu
> > Desnoyers
> > Sent: Thursday, January 28, 2016 9:09 PM
> > To: diamon-discuss@lists.linuxfoundation.org
> > Subject: [diamon-discuss] Diamon Meeting on Tuesday February 9th, 2016, at 11h
> > EDT (15h UTC)
> > 
> > Hi,
> > 
> > Following the blog post published two weeks ago [1], we would like to propose
> > organizing a phone meeting with all interested members of this workgroup on
> > February 9th to gather feedback and ideas for improvement on the subject of
> > measuring and detecting high response time.
> > 
> > At EfficiOS, we have developed a kernel module for monitoring at run-time the
> > delay between the moment the kernel starts processing an interrupt
> > (do_IRQ) and the moment the target task gets scheduled in or has finished
> > processing the data.
> > 
> > When a high latency is detected, it emits a tracepoint event and can wakeup a
> > user-space script to take arbitrary actions as soon as possible.
> > 
> > The main intent is to provide an entry point in a kernel trace. After that,
> > everyone has their own methodology to process the trace. The blog post
> > illustrates what we can do with LTTng as an example but the detection and
> > triggers are not coupled with any tracer.
> > 
> > The proposed agenda is a discussion around these points:
> > - presentation of the scope of the problem
> > - limitation of the current tools
> > - overview of the latency_tracker module applied for this use-case
> > -- current state
> > -- use-cases
> > -- future plans
> > - from the audience: comments, ideas, other approaches, etc.
> > 
> > If you have other points you would like to discuss around this subject, please
> > let me know and I will add them.
> > 
> > Also, if you wish to attend but can't make it at the proposed date and time, let
> > us know.
> > 
> > The details for the conference call will be sent soon.
> > 
> > Thanks,
> > 
> > Julien & Mathieu
> > 
> > [1] https://lttng.org/blog/2016/01/06/monitoring-realtime-latencies/
> > 
> > --
> > Mathieu Desnoyers
> > EfficiOS Inc.
> > http://www.efficios.com
> > _______________________________________________
> > diamon-discuss mailing list
> > diamon-discuss@lists.linuxfoundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/diamon-discuss
> 
> -- 
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com
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