Author: Slater Wold
Date: 09:15:07 11/30/01
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On November 30, 2001 at 11:59:01, Robert Hyatt wrote: >On November 30, 2001 at 02:31:18, Slater Wold wrote: > >>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 >> >>No. Because it's not solving the problem any quicker either. > > >For the record, if you run crafty, you will _always_ see both cpus running >at 100%. But it is possible that one thread is in a spin-lock waiting on >the other to release something, or that one is spinning waiting on work. > >IE just because a cpu is busy doesn't mean it is busy doing something >_useful_. :) Which is PAINFULLY obvious here.
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