likwid-perfctr: check executable status before sleeping

src/applications/likwid-perfctr.lua

@@ -1433,7 +1433,18 @@ if use_wrapper or use_timeline then
  end
  break
  end
- local remain = likwid.sleep(math.floor(duration - (twork * 1E6)))
+ exitvalue, exited = likwid.checkProgram(pid)
+ if exited then
+ io.stdout:flush()
+ if #execList > 0 then
+ break
+ end
+ end
+ local sleeptime = duration - (twork * 1E6)
+ local remain = 0
+ if sleeptime > 0 then
+ remain = likwid.sleep(math.floor(duration - (twork * 1E6)))
+ end
 
  exitvalue, exited = likwid.checkProgram(pid)
  if exited then