Author: Vincent Diepeveen
Date: 07:45:11 03/26/02
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On March 25, 2002 at 15:06:30, Tom Kerrigan wrote: >On March 25, 2002 at 08:08:44, Vincent Diepeveen wrote: > >>Using the same compiler i do not see speed difference between >>palomino and tbird for DIEP, so this TLB, prefetching is > >Who cares about Diep? > >>>Wrong, Hammer will clock higher than the AXP and Clawhammer prices will be >>>similar. >>When did the 64 bits hype start, 1994? >>It's 2002 now and we won't see a hammer in the shops before 2003. > >Yes, we will, and 64-bit processors have been around since the early 90s, why? > >>>Who was talking about McKinley? And where did you get 1GHz? Their target has >>>been 1.2GHz for years. >>Exactly why i mentionned it, it's recently shifted to 1Ghz. > >Reference? > >>Not a single chessprogram that i know is busy with sequential things, >>yours is? >>Only latency is important and that's 100Mhz simply. RDRAM is hell slow > >My program isn't "busy" with either. How many times does your program go to main >memory per node?? > >-Tom Reality in computerchess is that when crafty is hell faster on a cpu, that diep is equally faster on the same CPU. Idem for most programs that are 32/64 bits. I do not know how many lookups i have in main memory. For sure i need at DDR ram (64 bytes a cache line) several for hashtables. On average a full evaluation needs like a 100k clocks of the CPU, which eats 90% of the system time so the most important thing is and will remain the CPU speed. L1 cache is important so is L2 cache. The overwhelming problem is the number of instructions the cpu can do each clock. Of course if that number gets real big, like 10 (which no processor which i know from can do) then other things might get the bottleneck. For now the bottleneck is the number of instructions the cpu can process each cpu-clock. Best regards, Vincent
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