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

NAME
function::ktime_get_ns - Number of nanoseconds since boot
SYNOPSIS
ktime_get_ns:long()
ARGUMENTS
None
DESCRIPTION
This function returns the system ktime.
SEE ALSO
tapset::timestamp_monotonic(3stap)
SystemTap Tapset Reference November 2019 FUNCTION::KTIME_GET_(3stap)