Author: Vincent Lejeune
Date: 00:36:51 12/17/04
Go up one level in this thread
On December 17, 2004 at 02:37:32, Vincent Lejeune wrote: >On December 16, 2004 at 23:20:34, Paul Byrne wrote: > >>On December 16, 2004 at 22:23:49, Dann Corbit wrote: >> >>>On December 16, 2004 at 20:56:56, Robert Hyatt wrote: >>> >>>>On December 16, 2004 at 18:25:42, Vincent Lejeune wrote: >>>> >>>>>On December 16, 2004 at 17:31:10, Scott Gasch wrote: >>>>> >>>>>>On December 16, 2004 at 14:46:33, Dann Corbit wrote: >>>>>> >>>>>>>On December 16, 2004 at 03:37:46, Gian-Carlo Pascutto wrote: >>>>>>> >>>>>>>>On December 15, 2004 at 22:24:49, Alex wrote: >>>>>>>> >>>>>>>>>Of course it would be foolish to buy a New computer now...... Micrsoft is going >>>>>>>>>to present a 64 bit OS nest year, the Christmas prices of new computers will >>>>>>>>>drop like a BRICK by Jan 1.......... But ! Let us speculate.... Hmmmmmmmmmm >>>>>>>>>What will 64 bit DO for chesss programs ....Yes yes I KNOW AMD has New processor >>>>>>>>>that does 64 bit..... but what is the difference ..reallY? D >>>>>>>> >>>>>>>>Speed. >>>>>>>> >>>>>>>>You can expect programs to get 10-60% faster from 64 bit mode. >>>>>>>> >>>>>>>>This is in addition to the Athlon64 already being so fast in 32 bit mode. >>>>>>> >>>>>>>Another potential advantage is the large address space. >>>>>>> >>>>>>>With terabytes of ram directly addressable, potentially totally new solution >>>>>>>ideas may be formulated. >>>>>>> >>>>>>>For instance, you could memory map the 3-4-5 man tablebase files and lose the >>>>>>>disk access penalty. That might make them give a large Elo boost, while the >>>>>>>disk access method for 32 bit systems seems to be about break even. >>>>>>> >>>>>>>You could have 20 GB hash tables. >>>>>>> >>>>>>>You could store (in ram) a large tree of every chess game ever played together >>>>>>>with statistical information on each node. >>>>>> >>>>>>...of course this all assumes you have a machine with 20Gb of physical memory >>>>>>and a chipset that supports that much RAM. Until the cost of memory comes way >>>>>>down, you won't see me mapping EGTB files (compressed or not) into memory. :) >>>>>> >>>>>>Scott >>>>> >>>>>I'd suggest 2 pen drive USB like this : >>>>>http://www.supermediastore.com/pendrive-4gb-flash-drive.html >>>>> >>>>>Yes, no that cheap, but all 3-4-5 egtb way faster than disk >>>> >>>> >>>>"faster than disk"? What kind of disk do you use for your egtb's? Floppy or >>>>CDRom? :) The think you gave a link to is horribly slow compared to anything >>>>except for CD/floppy drives... >>> >>>480Mbps seems pretty fast to me. >>>What kind of disks are you using? >>>;-) >> >>They lie. :) I think 480 Mpbs is the limit for usb 2.0; nothing to do with >>the actual speed... they mention 7 Mbps on that page. Maybe 3 ms to read a >>tablebase block? I looked a while back with a similar idea, the latency >>of those things was a millisecond or two also. So it *might* be a little faster >>than a hard drive, but if it is, it won't be by a huge amount... >>-paul > > >read: 7000KByte/s >and access time is very low compare to disk ! and if you want better performance than USB go for ATA : http://www.memtech.com/35inch.html
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