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

Sorry all, not sure what happened on the last call. I had a conflict so wasn’t there, but Julien, maybe you and I should try a practice run before the next meeting?


---
Mike Dolan
VP of Strategic Programs
The Linux Foundation
Office: +1.330.460.3250   Cell: +1.440.552.5322  Skype: michaelkdolan
[email protected]
---

> On Feb 16, 2016, at 4:22 PM, Julien Desfossez <[email protected]> wrote:
> 
> 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 [email protected] 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: [email protected]
>>> [mailto:[email protected]] On Behalf Of Mathieu
>>> Desnoyers
>>> Sent: Thursday, January 28, 2016 9:09 PM
>>> To: [email protected]
>>> 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
>>> [email protected]
>>> https://lists.linuxfoundation.org/mailman/listinfo/diamon-discuss
>> 
>> -- 
>> Mathieu Desnoyers
>> EfficiOS Inc.
>> http://www.efficios.com
>> _______________________________________________
>> diamon-discuss mailing list
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