Author: Robert Hyatt
Date: 08:44:23 11/30/01
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On November 29, 2001 at 21:21:33, K. Burcham wrote: > > >Mr Hyatt. i have read the posts here about deep fritz and its kns increase with >two processors. > >from the info i have seen with my dual machine, i have become curious about >something. below are the examples with difference in hardware. > >program A on single processor 1500 mhz 1400 kns >program A on dual processor 3000 mhz 2000 kns > >program B on single processor 1500 mhz 1400 kns >program B on dual processor 3000 mhz 1400 to 1500 kns > > >my question is only about the chess software. not the hardware. not the ram. >not the hash. > >is it possible with these smp programs that something else going on in the chess >software, that you can comment on. in other words if this kns is accurate and a >true value (that deep fritz is giving us), then is it possible the program is >doing something else with this second processor that will not show a kns >increase but will add to its strength. the reason for this question is that when >i run task manager in windows 2000, it shows that the program is using the >second processor with deep fritz as much as my other smp programs (90 to 100%) >but it shows no increase in kns. > >kburcham I really can't answer. But it is worth pointing out that there are two ways to calculate Knps: Knps = total nodes / elapsed time Knps = total nodes / total cpu time The former will come close to doubling the Knps, the latter will not. But since most use the former method the Knps should always go up, usually close to 2x faster, although the actual search will not usually be 2x faster when you check the time to find a solution.
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