clockid(3) - phpMan

clock_getcpuclockid (3) - obtain ID of a process CPU-time clock
clock_getcpuclockid (3p) - access a process CPU-time clock (ADVANCED REALTIME)
pthread_getcpuclockid (3) - retrieve ID of a thread's CPU time clock
pthread_getcpuclockid (3p) - access a thread CPU-time clock (ADVANCED REALTIM...