On 7/10/2005 11:55 PM Nelis Lamprecht wrote:
On 7/11/05, Drew Tomlinson <[EMAIL PROTECTED]> wrote:
I just built my first 5.4-RELEASE system. I want a SMP kernel. The
GENERIC kernel conf file contains this line:
device apic # I/O apic
According to NOTES, this is all that's required to build an SMP kernel.
I don't see any mention of "this is all that's required" ?
OK, NOTES doesn't say that explicitly. But neither does it mention any
additional option(s) that ARE required which leads one to believe that
"this IS all that's required".
However my dmesg does not indicate that both processors are being used.
In version 4, these two lines were required:
options SMP # Symmetric MultiProcessor Kernel
options APIC_IO # Symmetric (APIC) I/O
I've searched Google but haven't found any definitive answers. Exactly
what lines do I need in my kernel conf and how can I verify both
processors are being used?
If you look in the usual place /usr/src/sys/i386/conf you will see a
SMP file that includes the option SMP for the default SMP enabled
GENERIC kernel. It would make sense to put that option along with apic
in your custom SMP kernel.
To verify after rebooting do a 'dmesg |grep CPU' and it should show
something along the lines of:
CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3056.82-MHz 686-class CPU)
Hyperthreading: 2 logical CPUs
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
Thanks for the pointer. I've added the SMP option and all is working.
Cheers,
Drew
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