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Hello<br>
<br>
I just tried to configure the metadata channel for UST. After that I
get an error when listing the session.<br>
Could someone please verify this? See below for the commands I used
and the error message.<br>
<br>
Many thanks in advance!<br>
<br>
Best Regards<br>
Bernd<br>
<br>
> lttng create<br>
Session auto-20141020-141307 created.<br>
Traces will be written in
/home/bernd/lttng-traces/auto-20141020-141307<br>
<br>
>lttng enable-channel --subbuf-size 8192 -u metadata<br>
UST channel metadata enabled for session auto-20141020-141307<br>
>lttng list auto-20141020-141307<br>
Tracing session auto-20141020-141307: [inactive]<br>
Trace path: /home/bernd/lttng-traces/auto-20141020-141307<br>
<br>
=== Domain: UST global ===<br>
<br>
Buffer type: per UID<br>
<br>
Error: UST channel not found<br>
Error: Command error<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/20/2014 01:26 PM, David Goulet
wrote:<br>
</div>
<blockquote cite="mid:20141020172654.GE15954@thessa" type="cite">
<pre wrap="">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
LTTNG_DOMAIN_LOG4J.
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: <a class="moz-txt-link-freetext" href="https://lttng.org">https://lttng.org</a>
Download link:
<a class="moz-txt-link-freetext" href="https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2">https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2</a>
GPG sig: <a class="moz-txt-link-freetext" href="https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2.asc">https://lttng.org/files/lttng-tools/lttng-tools-2.6.0-rc1.tar.bz2.asc</a>
Cheers!
David
</pre>
<br>
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</pre>
</blockquote>
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