system processor & execution cap settings

Discussions about using Windows guests in VirtualBox.
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vb97403
Posts: 20
Joined: 29. Dec 2011, 04:21
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Fedora 16 lxde

system processor & execution cap settings

Post by vb97403 »

host -- linux
guest -- xp pro

for a host OS with Core 2 duo w/4g RAM available, what would be an optimal setting for the guest OS xp with regards to the settings for device - system processor and execution cap settings?

for the VM, the defaults are 1 CPU with no limit on execution cap. would something like 2 CPU with a 50% percent give a performance boost to guest OS? or is it negligible, or simply better to keep 1 CPU assigned to guest.

nothing gong on on the host while i use VB, except i might have firefox browser open.
mpack
Site Moderator
Posts: 39134
Joined: 4. Sep 2008, 17:09
Primary OS: MS Windows 10
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Mostly XP

Re: system processor & execution cap settings

Post by mpack »

All the evidence I've seen suggests that you should go with the defaults, that multiple CPUs just introduces management issues that make it go slower instead of faster.
vb97403
Posts: 20
Joined: 29. Dec 2011, 04:21
Primary OS: MS Windows 7
VBox Version: OSE other
Guest OSses: Fedora 16 lxde

Re: system processor & execution cap settings

Post by vb97403 »

thanks. i agree. i've noticed that both CPUs are working, and even thought the default states only 1 CPU, my VM guest OS windows system properties recognizes 2 CPUs. whether or not the VM is in fact using both i don't know, but it sure looks and appears like it is.
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