On Wed, Jul 23, 2008 at 11:48:54AM -0400, Mario Charest wrote:
> 
> Is there a performance penalty in using more then 4Gig of ram on x86?

Indirectly. The page table entries go from 32 bits to 64 bits in size,
so the virtual => physical translations that the MMU hardware does will
cause more memory traffic, plus they'll take up more space in the data
cache, possibly throwing out other items that would have gotten cache
hits before.

	Brian

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Brian Stecher (bstecher@qnx.com)        QNX Software Systems
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