function::cpu_clock_ns - Number of nanoseconds on the given cpu's clock

cpu
           Which processor's clock to read

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

       function::cpu_clock_ns - Number of nanoseconds on the given cpu's clock

tapset::timestamp_monotonic(3stap)

SystemTap Tapset Reference                         April 2024                        FUNCTION::CPU_CLOCK_(3stap)

           cpu_clock_ns:long(cpu:long)