it_value           65 src/prof.c             tval.it_value.tv_sec = 0;                       \
it_value           66 src/prof.c             tval.it_value.tv_usec = SAMPLING_PERIOD;        \
it_value           75 src/prof.c             tval.it_value.tv_sec = 0;               \
it_value           76 src/prof.c             tval.it_value.tv_usec = 0;              \