+\subsubsection{Other useful info about running parallel programs}
+%* *
+%************************************************************************
+
+The ``garbage-collection statistics'' RTS options can be useful
+for seeing what parallel programs are doing. If you do either
+\tr{+RTS -Sstderr}\index{-Sstderr RTS option} or \tr{+RTS -sstderr},
+then you'll get mutator, garbage-collection, etc., times on standard
+error which, for PVM programs, appears in \tr{/tmp/pvml.nnn}.
+
+Whether doing \tr{+RTS -Sstderr} or not, a handy way to watch
+what's happening overall is: \tr{tail -f /tmp/pvml.nnn}.
+
+%************************************************************************
+%* *