Author: Brian Richardson
Date: 19:03:07 06/19/02
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On June 19, 2002 at 13:08:21, Robert Hyatt wrote: >On June 19, 2002 at 10:30:39, Brian Richardson wrote: > >>On June 19, 2002 at 00:39:23, Robert Hyatt wrote: >>>Two points: >>> >>>1. The 21264 runs Crafty at > 800K nodes per second using a single processor >>>at 600mhz. What 32 bit single processor can run crafty that fast? Answer: >>>zero. >>> >> >>Actually, my AMD 1900MP runs Crafty slightly faster than both the single and 2 >>cpu Alpha WAC nps test results, albeit at about 1600MHz, not 600. >> >>Of course, just having 64bits is not enough. MIPS was 64 bits in Oct 1991, but >>broad industry support requires other things, like lots of software, etc. >>Otherwise, Digital might have bought Compaq. >> >>That said, I decided to use 64 bit bitboards in Tinker (baed on Crafty) 4 years >>ago in anticipation of 64 bit Intel processors. I did not figure that Intel >>would be several years late. >> >>Brian > > >Your single-cpu machine breaks 1.2M nodes per second? I haven't seen such >results from any machine I have run on (32 bit machines anyway, limited to a >single CPU)... I can only go on what you posted earlier, Bob. Nearly 800Knps was the single cpu system. Either way, the AMD is slightly faster, as I had emailed you earlier. Note that this was also with v16.19 (no lockless hashing factor). Alpha 1 cpu 21264/600mhz: total positions searched.......... 300 number right...................... 300 number wrong...................... 0 percentage right.................. 100 percentage wrong.................. 0 total nodes searched.............. 236973211.0 average search depth.............. 4.5 nodes per second.................. 783641 2 cpus, 21264/600mhz: total positions searched.......... 300 number right...................... 300 number wrong...................... 0 percentage right.................. 100 percentage wrong.................. 0 total nodes searched.............. 330905102.0 average search depth.............. 4.5 nodes per second.................. 1266767 AMD 1900+MP max threads set to 2 hash table memory = 384M bytes. pawn hash table memory = 32M bytes. pondering disabled. Crafty v16.19 (2 cpus) test results summary: total positions searched.......... 300 number right...................... 300 number wrong...................... 0 percentage right.................. 100 percentage wrong.................. 0 total nodes searched.............. 19013488028.0 average search depth.............. 12.2 nodes per second.................. 1357144 (run without test xxx n, st=60) 1 CPU total positions searched.......... 300 number right...................... 300 number wrong...................... 0 percentage right.................. 100 percentage wrong.................. 0 total nodes searched..............4639292700.0 average search depth.............. 9.7 nodes per second.................. 960490 (run with test xxx n=8)
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