gerry at interpool.ca
Wed Oct 22 20:10:07 PDT 2003
On Wed, 22 Oct 2003 22:27:13 -0400
"Marco Greene (Home)" <mgreene at aci.on.ca> wrote:
|O|>Does FreeBSD autodetect multiple CPU's or do you specifically have to
|O|>configure the kernel and recompile?
In my experiences with FreeBSD 4-4.8R, you have to uncomment two lines in
the kernel config file.
# To make an SMP kernel, the next two are needed
options SMP # Symmetric MultiProcessor Kernel
options APIC_IO # Symmetric (APIC) I/O
and then rebuildworld and kernel.
World because there are programs that will compile differently if there
are multiple CPU's (at least I think that's right!)
Kernel for obvious reason.
|O|>outline in the handbook. However, when I try to boot with the new
|O|>kernel...it doesn't work.
I think you're going to have to give more information than "it doesn't
work" if you expect anybody to attempt to offer advice.
|O|>Also, how do you verify whether or not both CPUs have been configured
|O|>in the kernel...and that they are in fact being used?
type: dmesg |more
and look through the results. When my dual-cpu loads up, I see where
there 2nd CPU is acknowledged. Even doing a 'top' shows me which CPU is in
use for each program.
Scary Gerry -- Senior Systems Manager
freymann at scaryg.shacknet.nu
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