Author: Eugene Nalimov
Date: 10:34:33 06/17/04
Go up one level in this thread
On June 17, 2004 at 13:29:02, Anthony Cozzie wrote: >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? L1D: 16KB L1I: 16KB L2: 256KB L3: 1.5/3/6MB Thanks, Eugene >It is really amazing to me that Intel can't clock Itanium at 3+ GHZ. > >anthony
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