[lttng-dev] LTTng project development activities November 2013

[Mathieu Desnoyers]

----- Original Message -----
> From: "Christian Babeux" <christian.babeux at efficios.com>
> To: lttng-dev at lists.lttng.org
> Sent: Wednesday, November 6, 2013 5:19:45 PM
> Subject: [lttng-dev] LTTng project development activities November 2013
> 
> Hi lttng-aficionados,
> 
> My apologies for the missing October summary, the previous months have
> been pretty intense!
> 
> tl;dr : A lot of talks at LinuxCon/CloudOpen/Tracing Summit/ELCE on
> LTTng; On track for mid-november 2.4 release candidate with live
> streaming, Java JUL and health check in relayd/consumerd;
> 
> September 2013 summary:
> 
> - Minor releases:
> 
> lttng-modules 2.3.2, 2.3.1 and 2.2.2:
> 
> A timekeeping regression was introduced in the Linux kernel version
> 3.10.13 to 3.11.2 which could lead to hard system lockup when enabling
> the tracing of some subsystems, including but not limited to
> workqueues. The fix for this issue was merged in kernel 3.10.14 and
> 3.11.3+.

Small precision: the Linux kernel regression has been introduced in 3.10. It has been fixed in 3.10.14, 3.11.3, and 3.12 (and better).

LTTng modules has a blacklist that refuses to compile against the bad kernel versions.

Thanks,

Mathieu

> 
> - Patches for the live streaming support have been merged in lttng-tools.
> 
> October 2013 summary:
> 
> - Patches for Java Util Logging (JUL) support have been merged in
> lttng-tools.
> 
> - Patches for CTF writer have been merged in Babeltrace. This new API
> allow programmatic creation of CTF traces.
> 
> - Health check overhaul patches have been merged in lttng-tools. It is
> now possible to query to health status of the consumer daemon and the
> relay daemon.
> 
> Conferences activities:
> 
> * Google Summer of Code Mentor Summit 2013:
> 
> - Jérémie Galarneau and Christian Babeux went to the GSoC Mentor
> Summit to represent the LTTng project.
> 
> * LinuxCon Europe 2013:
> 
> - David Goulet gave a talk entitled "LTTng as a new monitoring tool" [1].
> 
> * CloudOpen Europe 2013:
> 
> - Julien Desfossez gave a talk entitled "Efficient and Large-scale
> Infrastructure Monitoring with Tracing" [2].
> 
> * Tracing Summit 2013:
> 
> - Alexandre Montplaisir gave a talk entitled "Analyzing all kinds of
> traces with TMF" [3]
> 
> - Mathieu Desnoyers gave a talk entitled "LTTng: Cloud Monitoring and
> Distribution Bug Reporting with Live Streaming and Snapshots" [4]
> 
> * Embedded Linux Conference Europe 2013:
> 
> - Christian Babeux gave a talk entitled "Bridging the gap between
> hardware and software tracing" [5]
> 
> On-going work:
> 
> We are on track for a mid-november 2.4 release candidate including the
> live streaming, Java JUL logging support and health check in the
> consumerd/relayd.
> 
> Thanks,
> 
> Christian
> 
> [1] -
> https://events.linuxfoundation.org/sites/events/files/slides/slides_2.pdf
> [2] -
> https://events.linuxfoundation.org/sites/events/files/slides/presentation-cloudopen.pdf
> [3] -
> http://www.tracingsummit.org/w/images/2/2a/TMF_AMG_TracingSummit2013.pdf
> [4] -
> http://www.tracingsummit.org/w/images/b/b3/Lttng-desnoyers-tracing-summit-2013.pdf
> [5] - http://www.slideshare.net/ChristianBabeux/slides-27979925
> 
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> 

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com