1 0.7 "Posix mutex"
2 1.5
3 2.2
4 2.9
5 3.7
break

1 2.0 "Posix read-write lock"
2 5.4
3 7.5
4 13.7
5 19.7
break

1 4.5 "Posix memory-based semaphore"
2 9.0
3 14.4
4 18.2
5 22.8
break

1 15.4 "Posix named semaphore"
2 31.1
3 46.5
4 62.5
5 76.8
break

1 16.3 "System V semaphore, w/out UNDO"
2 31.5
3 48.3
4 65.8
5 81.8
break

1 21.1 "System V semaphore, with UNDO"
2 37.5
3 57.7
4 75.8
5 90.0
break

1 89.4 "fcntl"
break