Vectorized Emulation: fuzzing at 2 trillion instructions per second

Re:Vectorized Emulation: fuzzing at 2 trillion instructions ... by pjc50 on Wednesday October 17, 2018 @09:24AM (#18238672)

I wondered about that too, but the author points out that the VMs can re-converge: if you have one that does 5 times round a loop and another that does 10, they end up resynchronised.

Any kind of software with a message or input processing loop will naturally re-converge at the top of the loop. It's quite neat.

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Re:Vectorized Emulation: fuzzing at 2 trillion instructions ... by TickleSteve on Wednesday October 17, 2018 @02:53PM (#18242416)

...but during that one iteration of the loop, the paths will diverge wildly.

In a typical message handling loop, the big-switch will immediately jump off to separate message-handling code, immediately wiping out the possibility of parallelisation.

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