Author: Robert Hyatt
Date: 20:32:40 11/30/01
Go up one level in this thread
On November 30, 2001 at 12:18:20, Slater Wold wrote: >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_. :) > >Speaking of which, did you know Crafty reports the wrong CPU usage time in >Windows? It always says that I am using like 90% when task manager (along with >other utilities) say it's using 100%. > I have seen this, but since I don't run windows here, I have never been able to track it down. If you are interested, I can tell you how the timing stuff works and perhaps get it right... >I also checked the memory paging in Crafty between 3xxMB ram and 7xxMB RAM. I >am guessing Crafty does the global lock, because it did extremly well. Better >than any others tested. Not sure what you mean by "global lock"...
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