Author: Vincent Lejeune
Date: 23:37:32 12/16/04
Go up one level in this thread
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 !
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