View source for Extrae

{{Infobox software
| description = The Extrae library allows MPI communication events of a parallel program to be recorded as a trace file. Additionally, certain program-specific events can also be included. To record MPI communication events, simply run the program with the Extrae library preloaded.
| developer              = BSC
| available on           = [[Hazel Hen]], [[Vulcan]]
| category               = [[:Category:Performance Analyzer|Performance Analyzer]]
| license                = GPL
| website                = [https://tools.bsc.es/extrae Extrae homepage] 
}}

== Introduction ==

== Usage ==

First load the needed software module:

{{Command 
| command = module load performance/extrae
}}

Then create a configuration file for the extrae run. Commented templates can be found under $EXTRAE_HOME/share/example.

Now set up the environment for the run.
{{Command| command =<div>export LD_PRELOAD=$EXTRAE_HOME/lib/libmpitrace.so <br>
export EXTRAE_CONFIG_FILE=extrae.xml</div>
}}
Finally run your application as usual. This will generate the needed tracefiles.

== Viewing traces with Paraver ==
To create a tracefile which is viewable with [[Paraver]] we have to convert the generated traces to a prv file

{{Command| command =
mpi2prv -f TRACE.mpits -o output.prv
}}

== Trouble shooting ==


== See also ==
* [[Software Development Tools, Compilers & Libraries]]

== External Links ==
* [http://www.bsc.es/plantillaF.php?cat_id=52 Extrae Homepage]