Re: Intel Memory Ordering White Paper

From: H. Peter Anvin
Date: Sat Sep 08 2007 - 16:38:19 EST


Nick Piggin wrote:
smp_rmb() should not need to do anything because loads are done
in order anyway. Both AMD and Intel have committed to this now.

The important point is that they *appear* to be done in order. AFAIK,
the CPUs can still do speculative and out of order loads, but throw
out the results if they could be wrong.

Is there anything even semiofficial from VIA? Not that the x86 architecture isn't pretty much definable as the AMD-Intel consensus...

-hpa

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