[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