Provided by: systemtap-doc_4.2-3ubuntu0.1_all 

NAME
function::gettimeofday_ns - Number of nanoseconds since UNIX epoch
SYNOPSIS
gettimeofday_ns:long()
ARGUMENTS
None
DESCRIPTION
This function returns the number of nanoseconds since the UNIX epoch.
SEE ALSO
tapset::timestamp_gtod(3stap)
SystemTap Tapset Reference November 2019 FUNCTION::GETTIMEOFD(3stap)