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Date:      Fri, 20 Sep 2002 14:31:12 -0400 (EDT)
From:      John Baldwin <jhb@FreeBSD.org>
To:        beemern <beemern@ksu.edu>
Cc:        smp@freebsd.org
Subject:   RE: For those with P4 SMP problems..
Message-ID:  <XFMail.20020920143112.jhb@FreeBSD.org>
In-Reply-To: <Pine.GSO.4.33L.0209201318190.13129-100000@unix2.cc.ksu.edu>

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On 20-Sep-2002 beemern wrote:
> 
> thanks for the diff
> 
> i made the (first) change; setting to 1, and dmesg gives:
> 
> --snip--
> real memory  = 536346624 (523776K bytes)
> avail memory = 517992448 (505852K bytes)
> Programming 24 pins in IOAPIC #0
> IOAPIC #0 intpin 2 -> irq 0
> Programming 24 pins in IOAPIC #1
> Programming 24 pins in IOAPIC #2
> FreeBSD/SMP: Multiprocessor motherboard
>  cpu0 (BSP): apic id:  0, version: 0x00050014, at 0xfee00000
>  cpu1 (AP):  apic id:  6, version: 0x00000000, at 0xfee00000
>  io0 (APIC): apic id:  2, version: 0x00178020, at 0xfec00000
>  io1 (APIC): apic id:  3, version: 0x00178020, at 0xfec80000
>  io2 (APIC): apic id:  4, version: 0x00178020, at 0xfec80400
> Preloaded elf kernel "kernel" at 0xc03b2000.
> --snip--
> 
> so theres no error, but my inclination is that its still not enabling the
> 2nd cpu.  again, i'm not sure how to verify for SURE whether it is or
> not.. i've just been running top and looking for 2 cpu's running
> 
> is there something in dmesg i should be looking for in particular?
> 
> i'm going to try now by setting physical_cpu to 2..11 as you indicated and
> see what happens

APIC ID 1 is the second logical CPU (hyperthreading) on the first physical
CPU.  Do you have hyperthreading turned on in your BIOS?  See if you
can turn it off for these tests.  Thanks.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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