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I am having a major performance hit to general processing when I have dual monitor setup with 3d acceleration enabled. If I have a single display I have no performance loss, nor do I notice it with dual diplay and no 3d acceleration enabled. The problem is I have several programs that require 3d acceleration in order to even run properly. What can I do to improve performance?

My host system is SUSE Linus Enterprise Desktop 11.3 with a quad core Xeon, 48GB RAM, Nvidia Quadro 2000, and 1TB PCIe SSD so the host should not be introducing any slowness.

Please attach the vbox.log for the guest in question.

Here is the most recent log.

Edit: The most recent boot has 3d disabled again since it has such poor performance when enabled.

Anyone have any thoughts on this? Does no one else see this kind of behavior?

lordveovis wrote:Anyone have any thoughts on this? Does no one else see this kind of behavior?

Someone might but you have to hope that someone is running a SUSE host AND is running dual monitors. Might take awhile.

Does no one else have this problem with other Linux hosts with dual monitor, 3d accel, Win 7 guest?

Looking at your log this morning, you have 6 cores assigned to your W7 guest. Try reducing it to 2 cores.

This had a significantly negative effect on performance. I was about 2-3 times as long to do anything, open programs, start the OS, etc.

This led me to set it for 5 processors and this seems to be closer to equal performance, I will use it for now and get back, but I do not think it is completely resolved, just less noticeable with only 5 of the 6 cores passed through.

I had initially thought that there was a performance increase, but it seems to be about the same. I seem to have about a 20% performance difference between 1 display and 2.