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Windows startup on multicore machines


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#1 skypilotpete

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Posted 20 February 2014 - 07:02 PM

I'm a member of an ebook community, and there is an argument going on there about whether Windows 7 starts up using all available cores on a multicore machine, or if it starts up using only 1 core by default. One member started this by posting a "helpful tip" saying that people could shorten their boot time by going in to Msconfig and telling windows to use all available cores on startup. Then someone else pitched in and said that Windows 7 DOES use all available cores by default, and that the setting in Msconfig is for telling Windows to use LESS than the full number of cores if you wanted that for some reason. I have no way of knowing which position is correct, and I wonder if anyone here has definitive knowledge of this issue.



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#2 JohnnyJammer

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Posted 20 February 2014 - 07:13 PM

yeh well if you define the available cores through the advanced boot options in Windows 7, you are telling it not to use the virtual cores through hyper threading. I have 4 Cores (Quad Core) and 8 logical processors. typing this into a command prompt will state how amny Windows 7 can see. Windows should use all available cores during startup and also while running, any application that doesnt handle threading will only utilize one core.
%number_of_processors%
Type the command msinfo32 into Run and see what it says on the dispay screen
Processor	Intel(R) Xeon(R) CPU           W3520  @ 2.67GHz, 2661 Mhz, 4 Core(s), 8 Logical Processor(s)


#3 skypilotpete

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Posted 20 February 2014 - 07:45 PM

Thanks for the info. I ran msinfo32:

Processor Intel® Core™2 Quad CPU           @ 2.40GHz, 2394 Mhz, 4 Core(s), 4 Logical Processor(s)

 

So, from what you say, the quickest start up will come from leaving the start up settings as default, rather than using the advanced options to specify 4 cores.






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