Wednesday, February 25, 2004 6:23:43 PM
I can see that, but x86 will also be moving to larger caches and multicores using this same rule, and probably be adding more execution units to each core, a new way of doing floating point, etc..
I'm wondering when an IPF part would perform better than a similarly sized x86 part in all aspects. Is there a crossover point where more cache for an x86 part doesn't make much difference, but it still does for an IPF part?
Today there is a large disparity in performance per unit of die size with current IPF implementations. You double the die size, but only gain 30% in fp performance, and possibly lose in integer performance when going from x86 to IPF. You could design a multicore x86 with a shared cache and still be under the Madison (6MB) die size, and it would likely outperform it in every benchmark, and in some cases kill it.
I think the metric for mainstream parts is performance per unit of die size. IPF has to at least be somewhat competitive in this metric for broad adoption, don't you think?
HailMary
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