Author: Matthew Hull
Date: 14:51:56 08/29/03
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On August 29, 2003 at 11:43:15, Mridul Muralidharan wrote: >Hi, > > Crafty has not been designed to run on numa - the current version will choke >as number of processors increase. >The way search is getting split , memory and cache affinity , etc will have to >be taken into account. Also it may have to stop using threads and move towards >processes. >These maybe the basic changes - so as you can see - huge rewrite that "may" >degrade perf on non-numa machines. > >Mridul > >On August 29, 2003 at 11:31:37, Matthew Hull wrote: > >>How large an effort is it to tweak Crafty to run efficiently on NUMA machines? >> >>Would such modification negatively affect it's performance on non-NUMA SMP >>machines? >> >>MH Hello Mridul, Thanks for your input. I've wondered because recent statements by Bob referred to the changes required as "tweaks", which made it sound like it was not a large effort, and that if he had access to a NUMA machine, he might work on it. Do the AMD duals count as NUMA? Or an old dual G4 Mac? If so, I'd think those might be quite cheap, relatively speaking. Perhaps someone could donate one for the purpose. Somone with as little as a dual, Linux/BSD/OSX and a cable modem could effectively donate machine time by creating accounts for the good professor and/or his minions, perhaps. Just a thought. Regards, Matt
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