Although it isn't equivalent to wireshark, linux's perf command (no doubt osx/win/bsd have their own) is close enough and very easy to use. It exposes a very l

Although it isn't equivalent to wireshark, linux's perf command (no doubt osx/win/bsd have their own) is close enough and very easy to use. It exposes a very large number of CPU counters, including cache misses etc. Not quite as thorough as simulating. But probably more useful in practice.