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

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

Adding Alexei and Brendan in CC, they will likely be interested
in the eBPF discussion.

Thanks,

Mathieu

----- On Feb 17, 2016, at 11:41 PM, Julien Desfossez jdesfossez@efficios.com wrote:

> Hi,
> 
> We are currently setting up a place on the diamon website so we can
> upload the slides, I will send the link soon.
> 
> Regarding the mainlining, we intend to push this projet upstream. Before
> that, we are working on more measurements/benchmarks, stability testing
> and usability improvements.
> 
> Also, one things that we would like to investigate before sending the
> patches is the possibility of using eBPF/bcc to handle the probes while
> keeping the latency-tracker as the backend to keep the state and all the
> more advanced interactions with the kernel. That way, we could combine
> the flexibility/safety of eBPF and the efficiency of the
> latency-tracker.
> 
> Thanks for your feedback, I will keep this list updated of the progress
> we make on that front.
> 
> Julien
> 
> On 14-Feb-2016 11:37:44 AM, Al Grant wrote:
>> Hi,
>> 
>> I have read the blog and this looks a very useful technique but unfortunately I
>> couldn't make the call.  Are slides/minutes available?
>> 
>> My main question is not actually technical - it's about the prospects for
>> getting
>> this into mainline Linux.
>> 
>> Thanks,
>> 
>> Al
>> 
>> 
>> > -----Original Message-----
>> > From: diamon-discuss-bounces@lists.linuxfoundation.org [mailto:diamon-
>> > discuss-bounces@lists.linuxfoundation.org] On Behalf Of Julien Desfossez
>> > Sent: 08 February 2016 19:14
>> > To: Mathieu Desnoyers
>> > Cc: diamon-discuss@lists.linuxfoundation.org
>> > Subject: Re: [diamon-discuss] Diamon Meeting on Tuesday February 9th, 2016,
>> > at 11h EDT (15h UTC)
>> >
>> > Hi,
>> >
>> > Here is the information for tomorrow's call:
>> > February 9th, 2016, at 11h EDT (15h UTC)
>> >
>> > Conference: 415-906-5657 PIN: 88326
>> > URL for the screen sharing: www.uberconference.com/mdolan
>> >
>> > Local International phone numbers are available at:
>> > https://www.uberconference.com/international
>> >
>> > Please note anyone dialing using the international numbers need to dial the
>> > local international number for the country they are in, then enter the US
>> > conference number (4159065657), and then enter the PIN (88326).
>> >
>> > Julien
>> >
>> > On 28-Jan-2016 08:08:45 PM, Mathieu Desnoyers wrote:
>> > > 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
>> 
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com