Virtual box gets much slower with more CPU's...

Discussions related to using VirtualBox on Mac OS X hosts.
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Starion
Posts: 19
Joined: 14. Oct 2012, 07:50

Virtual box gets much slower with more CPU's...

Post by Starion »

I am running WIN 10 on El Capitan on a Mac Pro 12-core. With only 1 processor selected in the settings, in runs reasonably fast, however any CPU number higher than 2 the speed slows to a crawl.

I'm sure there's an explanation for this, and I'm not complaining about the speed with 1 processor, but it would be nice to take advantage of some of the power of the machine I have.

Thoughts?
loukingjr
Volunteer
Posts: 8851
Joined: 30. Apr 2009, 09:45
Primary OS: Mac OS X other
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: just about all that run

Re: Virtual box gets much slower with more CPU's...

Post by loukingjr »

My guess is, once you exceed 2 cores the overhead of running more than 2 cores catches up and surpasses any advantage. It seems more than 2 cores on a 4 core CPU has similar performance issues. At least on OSX hosts.
OSX, Linux and Windows Hosts & Guests
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