Author: Bernhard Bauer
Date: 02:31:28 01/26/01
Go up one level in this thread
On January 26, 2001 at 04:52:42, Bernhard Bauer wrote: >On January 25, 2001 at 09:48:00, Robert Hyatt wrote: > >>On January 25, 2001 at 02:32:01, Bernhard Bauer wrote: >> >>>On January 24, 2001 at 12:06:40, Robert Hyatt wrote: >>> >>>>On January 24, 2001 at 10:22:28, Bernhard Bauer wrote: >>>> >>>>>On January 24, 2001 at 06:51:30, David Rasmussen wrote: >>>>> >>>>>>I have a problem with Crafty. >>>>>> >>>>>>I'm trying to run it on a solaris system with 24 CPUs (I've tried it as well on >>>>>>a 12 CPU machine of the same kind). >>>>>> >>>>>>I sometimes get the message "ERROR. no SMP block can be allocated". >>>>>>What does this mean? What is the problem >>>>> >>>>>In chess.h is a line >>>>>#define MAX_BLOCKS 16*CPUS >>>>> >>>>>You may change this line to a greater value. >>>>>For CPUS=2 this did noz work for me, so I use >>>>>#define MAX_BLOCKS 128 >>>>>and that works. >>>>> >>>>>Kind regards >>>>>Bernhard >>>> >>>> >>>>When you say "did not work for me" do you mean you got the out of blocks >>>>error? 2*16 should work for a dual. 4*16 works for my quad and never >>>>produces an error. If you watch the SMP part of the statistics output, it >>>>shows the max number of blocks used during a search: >>>> >>>> SMP-> split=507 stop=83 data=17/64 cpu=22.77 elap=6.18 >>>> >>>>in my case, 17 blocks was the peak usage, with a total of 64 (4*16). I would >>>>definitely be interested to know your peak number for a dual system. I would >>>>expect something in the 8-10 range typically. On my quad it averages about 12 >>>>over the course of a game. >>> >>>Dear Mr. Hyatt, >>> >>>when I compiled Crafty 18.1 with makefile.nt under WIN2000 with the MS compiler >>>C/C++-Compiler, Version 12.00.8804 >>>Crafty compiled fine, no errors, but when I started the exe file I got an error >>>immediatly. So if you ask "did you got the out of blocks error?" I will say yes >>>or no, it simply didn't run. A window poped up which said I had a memory error. >>>So I had no idea what the error coud be. First when I noticed the change from >>>17.14 to 18.1 in chess.h I was able to compile Crafty for SMP. >>> >>>When I ran the LCT2 test for 30 min/pos I got a peak number of 10/128. >>> >>>Kind regards >>>Bernhard >> >> >>OK... two issues... >> >>1. 10 blocks max seems about right for 2 cpus. since the default would be >>to have 32 (2*16) you should not have to change this. >> >>2. if this fixed your crash (no other changes at all) then there is _another_ >>problem. Could you compile with 32 blocks and debugging enabled and run under >>the debugger to see where it is crashing? This has to either be an optimizing >>problem or a serious bug in Crafty itself. It would be nice to know which. >> >>Bob > >Looks like there is n error in Init.c at line 1451. >The statement > for (i=0;i<64+1;i++) > LockInit(local[i]->lock); >gives an error for > Name Value > i 33 >local[i]->lock 0x0000ad80 > >And at memory location 0x0000ad80 the access violation occurs. > >So I changed the statement "for (i=0;i<64+1;i++)" to "for (i=0;i<32+1;i++)" >but now after invokink crafty nothing happens that means no output at all. >Anyway hope that helps a little. > >Kind regards >Bernhard Sorry, I forgot to compile with the /G6 option. Now it works for for (i=0;i<16*CPUS+1;i++) in init.c and #define MAX_BLOCKS 16*CPUS in chess.h Kind regards Bernhard
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