Re: Cray to commercialize Red Storm

Jan C. Vorbr?ggen <[EMAIL PROTECTED]> wrote:
> Does anyone actually use page sizes larger than, say, 64 kB? I thought
> all the so-called "large pages" essentially were aggregated smaller pages
> so that only one TLB entry for all of them is needed. If so, you "just"
> need to make sure that the I/O buffers/pages in question are not in such
> a region (or dissolve the region on the fly, as necessary).
>       Jan

Yes. The benefits for doing so, at least on my code, are substantial.
See this thread from last January (rejoin lines):

http://www.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=3E2FEBB7.2080
002%40brussels.sgi.com&rnum=1&prev=/groups%3Fas_q%3D%2522%2520Large%2520page%25
20sizes%2520on%2520Origin%25203800%2522%26safe%3Dimages%26ie%3DUTF-8%26oe%3DU
TF-8%26as_ugroup%3Dcomp.sys.sgi.*%26lr%3D%26hl%3Den


Andy


-- 
Andy Nelson                     School of Mathematics
[EMAIL PROTECTED]             University of Edinburgh 
http://maths.ed.ac.uk/~andy     Edinburgh Scotland EH9 3JZ  U. K.