[lttng-dev] [RELEASE] LTTng-Tools 2.6.0-rc1 - Gaia

Bernd Hufmann bernd.hufmann at ericsson.com
Mon Oct 20 14:44:21 EDT 2014


I just tried to configure the metadata channel for UST. After that I get 
an error when listing the session.
Could someone please verify this? See below for the commands I used and 
the error message.

Many thanks in advance!

Best Regards

 > lttng create
Session auto-20141020-141307 created.
Traces will be written in /home/bernd/lttng-traces/auto-20141020-141307

 >lttng enable-channel --subbuf-size 8192 -u metadata
UST channel metadata enabled for session auto-20141020-141307
 >lttng list auto-20141020-141307
Tracing session auto-20141020-141307: [inactive]
     Trace path: /home/bernd/lttng-traces/auto-20141020-141307

=== Domain: UST global ===

Buffer type: per UID

Error: UST channel not found
Error: Command error

On 10/20/2014 01:26 PM, David Goulet wrote:
> Greetings everyone (including LTTng bards!),
> The lttng-tools project provides a session daemon (lttng-sessiond) that acts as
> a tracing registry, the "lttng" command line for tracing control, a lttng-ctl
> library for tracing control and a lttng-relayd for network streaming and live
> reading.
> This is the release candidate number 1 of version 2.6, code name: Gaia.
> This features are listed below but here is a quick howto to use them. For the
> MI feature, simply adds to the lttng command line the option "--mi xml". Only
> XML is supported for now.
> 	lttng --mi xml version
> Note that there are now new lines for parsing efficiency. You can find the XML
> schema in "src/common/mi_lttng.xsd". Big thanks to Jonathan Rajotte for this
> great feature that the lttng bash completion file has already started using it!
> Also, Java log4j support has been added as a new domain (like JUL) that you can
> use with the command line option -l, --log4j and with the API using
> Finally, it's now possible to do per syscall tracing. You can get a full list
> of the available syscalls on your system with "lttng list -k --syscall". To
> enable a syscall, use its name like so:
> 	lttng enable-event -k --syscall connect
> Note that it's not possible to choose the bitness of the syscall thus for
> instance enabling "read" on a kernel supporting both 32 and 64 bit will enabled
> both of them.
> Of course, we fix a BUNCH of things that hopefully will make lttng tools more
> stable and powerful :). Here is the ChangeLog entry for 2.6-rc1.
> 2014-10-20 lttng-tools 2.6.0-rc1 (Harry Belafonte records Banana Boat Song)
> 	* Machine Interface added to lttng command line (--mi)
> 	* Java Log4j agent support (--log4j)
> 	* Kernel per syscall tracing
> 	* Multiple fixes. A lot!
> Please report ANY issues to bugs.lttng.org or on that mailing list.
> Using it is testing it!
> Project website: https://lttng.org
> Download link:
> https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2
> GPG sig: https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2.asc
> Cheers!
> David
> _______________________________________________
> lttng-dev mailing list
> lttng-dev at lists.lttng.org
> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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