centos man page for function::local_clock_us

FUNCTION::LOCAL_CLOC(3stap)					Timestamp Functions				       FUNCTION::LOCAL_CLOC(3stap)

NAME
       function::local_clock_us - Number of microseconds on the local cpu's clock

SYNOPSIS
	   local_clock_us:long()

ARGUMENTS
       None

DESCRIPTION
       This function returns the number of microseconds on the local cpu's clock. This is always monotonic comparing on the same cpu, but may have
       some drift between cpus (within about a jiffy).

SystemTap Tapset Reference					     June 2014					       FUNCTION::LOCAL_CLOC(3stap)