Re: does fedora support 2 CPU system w/ HT?
From: Marc Schwartz (MSchwartz_at_mn.rr.com)
Date: 04/07/05
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Date: Thu, 07 Apr 2005 12:56:03 GMT
Giovanni Azua wrote:
> Hello Marc,
>
> First of all thank you very much for your response.
>
> I installed Fedora and did not find any option for enabling
> or using the "SMP" kernel, although, when Fedora loads
> it shows kernel smp somewhere during load. Note I installed
> Fedora from VMware to get familiar before going Dual boot
> with XP.
>
> I have HT enabled (4 CPU visible from XP Task Manager) but from
> Fedora I only see one CPU (using System Monitor and top).
>
> Might be a configuration option from VMware? Am I missing anything else?
>
> btw Fedora from VMware runs REALLY slow and I have Dual Xeon
> 3.2Ghz 2GB RAM (Dell Precision 670 Workstation).
>
Giovanni,
Happy to help.
Unfortunately, I do not have experience running Linux under VMWare, so I
am not going to be of help there. The slow performance is likely the
combination of only having a single CPU functioning and presumably the
overhead of running FC under VMWare. Running one OS under another is
always going to be slower than running the same OS natively.
Under normal circumstances, Anaconda, which is the RH/FC installer, will
pick up that you have more than one CPU and install both the single
kernel and the SMP kernel during installation.
By more than one CPU, that may be multiple physical CPUs or a single CPU
with HT enabled.
The actual selection/booting of the single versus SMP kernel is done
via a GRUB menu during routine system boot. The GRUB menu's options and
defaults are defined in a file called /boot/grub/grub.conf.
I presume that under VMWare, you may not actually be booting in the
normal sense, which alters the normal boot procedure, perhaps bypassing
GRUB. I would suggest reviewing the VMWare documentation and/or checking
their web site for further information and what needs to be done to have
multiple physical/virtual CPUs recognized.
HTH,
Marc
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