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@@ -313,6 +313,8 @@ detailed in the next chapter. The various informations should be checked for.
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looks like (see @ref{DAG}).
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@item If only some workers are completely red (Blocked), for some reason the
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scheduler didn't assign tasks to them. Perhaps the performance model is bogus,
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- check it (see @ref{Codelet performance}).
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+ check it (see @ref{Codelet performance}). Do all your codelets have a
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+ performance model? When some of them don't, the schedulers switches to a
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+ greedy algorithm which thus performs bad.
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@end itemize
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@end itemize
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