Author: P. Massie
Date: 11:29:04 06/08/04
I had an opportunity yesterday to run some benchmarks on a laptop with the new Dothan chip. It was an IBM T42p with the Pentium M (Dothan) at 1.8 ghz and 512 MB of RAM. I did comparisons with my normal laptop, an IBM T40p with a Pentium M (Banias) at 1.6 ghz and 1 GB or RAM. I ran Fritz8, Hiarcs8 and Shredder8, all with 64 MB allocated to hash tables. The clock speed increase is 12.5%, so we should see at least that much increase. The actual results were not something I expected: Fritz8 mark 1182 -> 1542 = 30% gain Fritz8 knps 1065 -> 1194 = 12% gain Hiracs8 mark 790 -> 923 = 17% gain Hiarcs knps 236 -> 275 = 17% gain Shredder8 mark 1392 -> 2784 = 100% gain Shredder8 knps 301 -> 420 = 40% gain I have no explanation for why the "mark" number for Shredder and Fritz increased so much more than the knps, but I would love to know. It's clear from these numbers that different programs benefit differently from the new processor architecture, most likely from the fact the Dothan has an L2 cache twice as large as on the Banias. In any case, food for thought... Paul
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