#! /usr/bin/env stap

global command, syscall_count, syscall_times, this_syscall_time, this_syscall

function accumulate () {
  tid = tid()
  if (! ([tid] in command)) command[tid] = execname()
  syscall=pp() # just the substring ideally
  syscall_count[tid,syscall] ++
  this_syscall[tid] = syscall
  this_syscall_time[tid] = gettimeofday_us()
}
function decumulate () {
  tid = tid()
  syscall = this_syscall[tid]
  syscall_times[tid,syscall] += gettimeofday_us() - this_syscall_time[tid]
  # free up memory
  delete(this_syscall[tid])
  delete(this_syscall_time[tid])
}
probe kernel.function("sys_*").call {
  accumulate ()
}
probe kernel.function("sys_*").return {
  decumulate ()
}
probe timer.ms(5000) {
  exit ()
}
probe end {
  foreach ([tid,syscall] in syscall_count- limit 30) {
    printf("%s(%d) %s count=%d ttime=%d\n", command[tid], tid, syscall,
	   syscall_count[tid,syscall], syscall_times[tid,syscall])
  }
}