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@@ -62,6 +62,17 @@ starpu_data_set_wt_mask(img_handle, ~0U);
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will request to always automatically broadcast the updated data to all memory
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nodes.
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+@node Task granularity
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+@section Task granularity
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+
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+Like any other runtime, StarPU has some overhead to manage tasks. Since
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+it does smart scheduling and data management, that overhead is not always
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+neglectable. The order of magnitude of the overhead is typically a couple of
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+microseconds. The amount of work that a task should do should thus be somewhat
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+bigger, to make sure that the overhead becomes neglectible. The offline
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+performance feedback can provide a measure of task length, which should thus be
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+checked if bad performance are observed.
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+
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@node Task submission
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@section Task submission
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