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Technology Stocks : Advanced Micro Devices - Moderated (AMD)
AMD 219.83+1.1%Dec 1 3:59 PM EST
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To: Joe NYC who wrote (196986)5/15/2006 11:29:24 PM
From: dougSF30Read Replies (1) of 275872
 
Joe, it can be significantly more than a few cycles (that's only 1 or 2 instructions worth). From Johan's article:

Determining whether a load and a store share the same address is called memory disambiguation. Allowing loads to move ahead of stores gives a big performance boost. In some snippets of benchmarking code, Intel saw up to a 40% performance boost, solely the result of the more flexible way Loads get reordered. It is pretty clear that we won't see this in most real applications, but it is nevertheless impressive and it should show tangible (10-20%) performance boosts together with the fast L2 and L1 cache.
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