What is the "Ideal Processor" value?

3

What is the "Ideal Processor" value and why/how does it pick a certain processor to run on?

I've recently seen an obvious increase in CPU usage on the furthest last core, core #7 (i7 930 Hyperthreaded). I don't understand how/why this is happening, but it seems to correlate with a value set in each program's properties called "Ideal Processor" (seen within Process Explorer), which is being set to #7 on programs.

I'm confused, as I've never really seen this core do much processing or work in the past, but now within the past week or so, it's suddenly become the big man on campus.

Coldblackice

Posted 2013-04-16T02:23:24.140

Reputation: 4 774

They are referred here http://msdn.microsoft.com/en-us/library/windows/desktop/ms684251%28v=vs.85%29.aspx but it doesn't really explain the how and why yours set to #7

– Martheen Cahya Paulo – 2013-04-16T07:05:29.953

Answers

0

http://msdn.microsoft.com/en-us/library/windows/desktop/ms686253(v=vs.85).aspx

I think it's something for large groups of CPUs.

On a system with more than 64 processors, this function sets the preferred processor to a logical processor in the processor group to which the calling thread is assigned. Use the SetThreadIdealProcessorEx function to specify a processor group and preferred processor.

MrPras

Posted 2013-04-16T02:23:24.140

Reputation: 16

Asked: 2013-04-16T02:23:24.140

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Active: 2013-11-23T00:04:32.187