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  3. December 2008

Re: Largest installed, single, i 595?

Steve Richter wrote:

interested to know if the 32 CPU limit has to do with the
"dispatcher lock" discussed in this video ( at the 1:50 mark )
http://channel9.msdn.com/shows/Going+Deep/Mark-Russinovich-Inside-Windows-7/

the speaker says that up until windows 7, windows used CPU word sized
bitmaps to represent the state of each processor in the system.

I have heard a variety of unofficial explanations for a limit of 32 per LPAR, ranging from preventing the midrange from overlapping higher class systems to the law of diminishing returns. FWiW I chose not to install yet another video viewer on my system, so I will be unable to watch the video at the given link.

Regards, Chuck

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