Author: Robert Hyatt
Date: 08:27:35 01/30/99
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On January 30, 1999 at 08:11:42, Antonio Palma wrote: >I have just tested a 1.0 b version of the memturbo program on a 64 Mb 333 AMD K6 >on a Fritz 5.32 hash 32 and surprisingly i have these results: > >Fritzmark 204+/-6 without memturbo >Fritzmark 244 +/- 5 with memturbo > >I have tested fritz 5.32 on a 400 Mhz Pentium II hash 32 mb i had these results: > >Fritzmark 244 +/- 5 without memturbo > >I appreciate any comments. > >Kindly regards > >P.S. I am not involved in company that sells memturbo. there are only two ways to do this: 1. if you have a 'tweakable bios' you can tune the timing up but you can easily overrun memory and produce either gross or very subtle errors. I doubt your utility does this as every MB has a different bios anyway. 2. there is a well known cache-line aliasing problem. This utility probably moves the program so that it runs in physically contiguous RAM pages, so that it gets the best possible RAM-to-cache mapping possible, which is a _serious_ problem for everyone (even unix... I am currently working on testing a 'page- coloring' algorithm for linux that fixes this there, for example).
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