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Commit 0bddd8c2 authored by Nathalie Furmento's avatar Nathalie Furmento
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tutorials: add doc on STARPU_PERFMODEL_DIR

parent a7facceb
......@@ -608,11 +608,25 @@ whole graph of tasks, and wait for termination.
Performance prediction is essential for proper scheduling decisions, the
performance models thus have to be calibrated. This is done automatically by
StarPU when a codelet is executed for the first time. Once this is done, the
result is saved to a file in <tt>$STARPU_HOME</tt> for later re-use. The
result is saved to a file in <tt>$STARPU_PERF_MODEL_DIR</tt> for later re-use. The
<tt>starpu_perfmodel_display</tt> tool can be used to check the resulting
performance model.
</p>
<p>
<tt>STARPU_PERF_MODEL_DIR</tt> specifies the main directory in which
StarPU stores its performance model files. The default is
$STARPU_HOME/.starpu/sampling.
<br/>
<tt>STARPU_HOME</tt> specifies the main directory in which StarPU
stores its configuration files. The default is <tt>$HOME</tt> on Unix
environments, and <tt>$USERPROFILE</tt> on Windows environments.
<br/>
In this tutorial which is using the Simgrid version of StarPU, we are
setting <tt>STARPU_PERF_MODEL_DIR</tt> to a specific
directory <tt>sampling</tt> available in the archive
</p>
<tt>
<pre>
$ starpu_perfmodel_display -l
......
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