SYNOPSIS  
  
    cpu_clock_ns:long(cpu:long) 
 
  ARGUMENTS  
   cpu  
 Which processor's clock to read 
 
  DESCRIPTION  
  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). 
 
  SEE
  ALSO0  
    tapset::timestamp_monotonic (3stap)