Author: Anthony Cozzie
Date: 10:29:02 06/17/04
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On June 17, 2004 at 13:20:40, Eugene Nalimov wrote: >On June 17, 2004 at 06:55:18, Vincent Diepeveen wrote: > >>[...] >> >>Please list the processors in order of L2 cache speed and you'll realize that >>speed still is of overwhelming importance. List them at random access speed for >>L2 cache (some processors are faster in streaming than random access in their >>caches like P4). >> >>Basically opteron has fastest L2 cache which can deliver each 13 cycles data (4 >>reads simultaneously even if i understand well). No other processor can deliver >>data from L2 cache that fast. > >Intel Itanium 2 Processor Reference Manual For Software Development and >Optimization, Table 6-4 "Cache Summary": > >Itanium2 cache latency: > L1: 1 cycle, 4 loads/cycle > L2: 5 cycles (integer loads), 4 loads/cycle > L3: 12/14 cycles, depending on cache size (integer loads), 1 load/cycle > >Thanks, >Eugene > Correct me if I am wrong, but aren't Itanium's caches off by 1? In other words, the 6MB cache on the Itanium is L3, and the L1 cache is like 1KB? It is really amazing to me that Intel can't clock Itanium at 3+ GHZ. anthony
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