[andikleen2]

You have to be a bit careful with the CLFLUSH method. I tried to use it in a widely used program years ago because Intel recommended it, but we found that it just hangs the CPU on some older VIA/Centaur CPUs. Presumably that's fixed these days, but the old CPUs are likely still around.

[Nyan]

Thanks for the info! Unfortunately I don't have access to any VIA/Centaur CPUs, so couldn't test on those (though test results welcome if anyone is willing/able to!).

But yeah, you have to check the CPU you're running on when doing these tricks unfortunately, as results vary greatly across micro-architectures.

Interestingly, there's a more optimal CLFLUSHOPT instruction on more recent processors, which often seems to be quite effective for this task.

[ComputerGuru]

Funny. My line of thought was “it’s probably still not fixed, but those old cpus won’t be running new code anytime soon.”