CLOCK_DIFF         32 ompi/mca/topo/treematch/treematch/tm_timings.c   return CLOCK_DIFF(t2,t1);
CLOCK_DIFF        710 ompi/mca/topo/treematch/treematch/tm_tree.c       duration = CLOCK_DIFF(time1, time0);
CLOCK_DIFF       1412 ompi/mca/topo/treematch/treematch/tm_tree.c       duration=CLOCK_DIFF(time1, time0);