Re: large page patch (fwd) (fwd)

David Mosberger
2002-08-05T16:55:54Z

>>>>> On Sun, 4 Aug 2002 15:30:24 -0400, Hubertus Franke <frankeh@watson.ibm.com> said:

Hubertus> Yes, if we (correctly) assume that page coloring only buys
Hubertus> you significant benefits for small associative caches
Hubertus> (e.g. <4 or <= 8).

This seems to be a popular misconception. Yes, page-coloring
obviously plays no role as long as your cache no bigger than
PAGE_SIZE*ASSOCIATIVITY. IIRC, Xeon can have up to 1MB of cache and I
bet that it doesn't have a 1MB/4KB=256-way associative cache. Thus,
I'm quite confident that it's possible to observe significant
page-coloring effects even on a Xeon.

--david