C:\test\lockfree>mutex2 1 102400000
threads:    1 loops: 102400000  count:  204800000 time:73.739000 processor cycles: 176641186086

C:\test\lockfree>mutex2 4 102400000
threads:    4 loops:  25600000  count:  204800000 time:631.779000 processor cycles: 1247492094759