proc_usage
if (proc_usage(pid, &usage, &gret) == 0) {
timestruc_t user, sys, proc_usage;
proc_usage = sys;
TIMESTRUC_ADD_TIMESTRUC(proc_usage, user);
TIMESTRUC_DELTA(delta, proc_usage,
proc_usage = sys;
TIMESTRUC_ADD_TIMESTRUC(proc_usage, user);
TIMESTRUC_DELTA(delta, proc_usage,