Messages in this thread | | | Date | Sat, 31 Dec 2005 20:20:17 -0200 | From | Marcelo Tosatti <> | Subject | Re: [PATCH 1/9] clockpro-nonresident.patch |
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On Sat, Dec 31, 2005 at 09:53:11AM -0500, Rik van Riel wrote: > On Sat, 31 Dec 2005, Peter Zijlstra wrote: > > > > > +/* > > > > + * For interactive workloads, we remember about as many non-resident pages > > > > + * as we have actual memory pages. For server workloads with large inter- > > > > + * reference distances we could benefit from remembering more. > > > > + */ > > > > > > This comment is bogus. Interactive or server loads have nothing to do > > > with the inter reference distance. To the contrary, interactive loads > > > have a higher chance to contain large inter reference distances, and > > > many common server loads have strong locality. > > > > > > <snip> > > > > Happy to drop it, Rik? > > Sorry, but the comment is accurate. > > For interactive workloads you want to forget interreference > distances between two updatedbs, even if mozilla didn't get > used all weekend. > > OTOH, on NFS servers, or other systems with large interreference > distances, you may _need_ to remember a larger set of non-resident > pages in order to find the pages that are the hottest. > > In those workloads, the shortest inter-reference distance might > still be larger than the size of memory...
Sure, for the few cases you describe here the comment is valid.
Happy new year!
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