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Extrae
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Note, this page is outdated
| The Extrae library allows MPI communication events of a parallel program to be recorded as a trace file that can be analysed, e.g., visually with Paraver or used as an input for a simulator as Dimemas. Additionally, certain program-specific events can also be included. To record MPI communication events, simply run the program with the Extrae library preloaded. |
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Note, this page is outdated
Introduction
Usage
First load the needed software module:
module load performance/extrae
Then create a configuration file for the extrae run. Commented templates can be found under $EXTRAE_HOME/share/example.
Now set up the environment for the run.
export LD_PRELOAD=$HLRS_EXTRAE_ROOT/lib/libmpitrace.so
export EXTRAE_CONFIG_FILE=extrae.xml
export EXTRAE_CONFIG_FILE=extrae.xml
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
mpi2prv -f TRACE.mpits -o output.prv