Author: Anthony Cozzie
Date: 23:11:03 11/19/02
Go up one level in this thread
On November 19, 2002 at 16:48:55, Robert Hyatt wrote: >On November 19, 2002 at 16:36:23, Gian-Carlo Pascutto wrote: > >>On November 19, 2002 at 16:34:46, Russell Reagan wrote: >> >>>On November 19, 2002 at 16:18:01, Gian-Carlo Pascutto wrote: >>> >>>>I don't think there's any way to prove that they are. >>>> >>>>I don't think it's a good idea to spew nonsense arguments >>>>in a fruitless attempt to convince someone who has another >>>>opinion. >>> >>>So in other words, you have just been a troll today. >> >>No, I've been specifically attacking people making unjustified >>claims they can never support with sound argumentation. >> >>-- >>GCP > > >I found one bit of data. > >Bruce compiled ferret on a pentium pro 200, and then on a 500mhz alpha. He ran >2.5X faster. >I compiled Crafty on the same pentium pro 200 using the same compiler as bruce >(MSVC) >and then on the alpha using the same compiler again and I ran 3.5x faster. > >How would you explain that difference? > >Everything was the same for the two programs. Same compiler. Same processor. >Same >everything. Except that Bruce used his 0x88 or whatever at the time, while I >was using a >bitmap. This was in 1997, pretty early. I ran on that machine for the 1997 >WMCCC >event. Bruce used one of the cryo-machines at 767mhz that year... > >but 2.5X vs 3.5X has to come from somewhere. Luck? Or what? I'm pretty sure I >_know_ >the answer. That is a 40% improvement if I did my math right. Which is in line >with what >most knowledgable people claim a bitmap program should do since not all >instructions need >64 bits of data (branches, loop counters, a few others). /skepticism on remember, there are many many many differences between the Alpha and the P6, not just the fact that alpha is a 64 bit architechture. Alpha is a true RISC, different caches, page sizes, etc. /skepticism off
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