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Large pages actually make your effective data cache size bigger

Large pages actually make your effective data cache size bigger

Posted Sep 21, 2007 4:21 UTC (Fri) by adsharma (subscriber, #8967)
Parent article: Large pages, large blocks, and large problems

A lot of people tend to think that large pages are about TLB. But for most apps I've seen - they're actually about making the caches bigger on x86.

With 4K pages, the application data and page table pages compete for the data cache. With 2MB pages, the page tables are much smaller - effectively allowing more app data to be cached.


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