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Politics : Formerly About Advanced Micro Devices
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To: Elmer who wrote (74539)10/7/1999 4:29:00 PM
From: Tenchusatsu  Read Replies (1) of 1573038
 
Everyone, regarding the Coppermine benchmarks, the slide at MPF which mentioned the SpecInt/SpecFP scores of 29/25 listed this as the system configuration:

New Pentium III processor 600 MHz (with ATC, ASB) vs. today's Pentium III processor 600B MHz. Source: Intel MAP; Results estimated using Intel C/C++ Compiler 4.5 and Intel Fortran Compiler 4.5. System configuration: Pre-production Intel VC820 board with 133 MHz system bus, 256MB RDRAM, IBM371800 ATA-66, Diamond Viper 770 Ultra TNT2 AGP 4X.

At the presentation, Jim Wilson (Intel guy) said that the tests were run with SSE optimizations. My guess that only the cache-streaming operations were used, not the SIMD instructions. Cache-streaming can be supported in the compiler without any specific attention from the programmer, while SIMD requires specific coding.

Also noteworthy was the estimated scalability in performance when the clock speed reaches 800 MHz. Extracting performance numbers, SpecInt would go to 36.8 and SpecFP would go to 29.2. Jim Wilson said that Coppermine would not have seen such scalability without ATC (Advanced Transfer Cache).

That's the main reason for the Coppermine enhancements. It's not supposed to blow Athlon away. Rather, it's supposed to give even more performance headroom for future clock speeds of 800 MHz and beyond. Without it, clocking a Coppermine past 800 MHz would make no sense performance-wise.

Tenchusatsu

P.S. - I'm still working on the trip report.
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