Question about using multiple core for Vista Guest

carfield · Post by **carfield** » 28. Jul 2009, 19:47

I am using Ubuntu 9 with 64Bit version of VirtualBox, and the guest system is 32bit Vista. After I turn on multiple core support but from the system monitor, it still show only have 1 of my core is busy . Why that happened?

Post by **dmcgraw** » 28. Jul 2009, 19:49

Because you only had 1 core when you installed Vista, so Vista did not install an SMP kernel.

Post by **Sasquatch** » 28. Jul 2009, 20:05

And to answer the future question of how to solve it: search!

. You have to point Vista to use a new kernel. You can change this in the device manager, by updating the driver for the computer type. Don't let it detect things automatically, but point to one yourself, namely the ACPI multiprocessor kernel.

carfield · Post by **carfield** » 29. Jul 2009, 19:17

Sasquatch wrote:And to answer the future question of how to solve it: search! . You have to point Vista to use a new kernel. You can change this in the device manager, by updating the driver for the computer type. Don't let it detect things automatically, but point to one yourself, namely the ACPI multiprocessor kernel.

Thanks a lot, but I cannot find that "ACPI multiprocessor kernel" , am I need to install some kind of driver? Or doing something like this - http://techrepublic.com.com/5208-6230-0 ... ID=2286286 ??

Post by **Sasquatch** » 29. Jul 2009, 20:04

That's also one of the possibilities to get SMP working. I know that XP Pro can use the method I described, but XP Home can't. Guess it's the same for Vista Home.

carfield · Post by **carfield** » 30. Jul 2009, 18:25

Sasquatch wrote:That's also one of the possibilities to get SMP working. I know that XP Pro can use the method I described, but XP Home can't. Guess it's the same for Vista Home.

I have difficulty to start Windows using CD.... I don't know why . Can I just update visual box image directly?

carfield · Post by **carfield** » 30. Jul 2009, 19:25

carfield wrote:
Sasquatch wrote:That's also one of the possibilities to get SMP working. I know that XP Pro can use the method I described, but XP Home can't. Guess it's the same for Vista Home.
I have difficulty to start Windows using CD.... I don't know why . Can I just update visual box image directly?

... sorry, I can boot from it... it just need me to press the key in order to boot from CD....

However, after booting, it is "ACPI x86-based PC" instead of "ACPI multiprocessor kernel", and it is slower than before. I find that it is easy for all 4 core go to 100%. May be I need to find that "ACPI multiprocessor kernel" to install?? Or it is because my vista is home 32-bit, having problem to run multicore?

carfield · Post by **carfield** » 1. Aug 2009, 18:49

OK, resolve the issue, not sure if it is the issue of vista of virtualbox, if I select 4 CPU, it will be very slow, and even if the VM is idle, it still take a lot of CPU for all of 4 core.

But if I select 2 core, it work very smooth.

carfield · Post by **carfield** » 9. Aug 2009, 20:10

carfield wrote:OK, resolve the issue, not sure if it is the issue of vista of virtualbox, if I select 4 CPU, it will be very slow, and even if the VM is idle, it still take a lot of CPU for all of 4 core.

But if I select 2 core, it work very smooth.

Just like to say, with VirualBox 3.0.4, even QualCore can run smooth in Vista Guest and 64bit Linux host, great work.

virtualbox.org

Question about using multiple core for Vista Guest

Question about using multiple core for Vista Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest

Re: Question about using multiple core for Visita Guest