freebsd stable - Sep 2013 - Only one CPU core detected on Supermicro E3-1240 v3

Hello,

I am trying to install FreeBSD 9.2-RC4 on Supermicro server with Intel Xeon
E3-1240 v3 processor. The processor has 4 cores with 8 threads. However only one
core is detected (with two threads):

FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 1 core(s) x 2 SMT threads
cpu0 (BSP): APIC ID:  0
cpu1 (AP): APIC ID:  1

The motherboard is Supermicro X10SLM-F. All cores are enabled in BIOS and the
latest firmware is installed (version 1.1a, Build Date 08/20/2013).

Output from dmesg is available here:
https://www.dropbox.com/s/u7hp8mlq2wo3oi5/dmesg.txt

I have tried FreeBSD 9.1 as well and it behaves the same - only one core is
detected.

What can I do so that all cores are properly detected?

Marian

Marian Cerny wrote:
> I am trying to install FreeBSD 9.2-RC4 on Supermicro server with Intel Xeon
E3-1240 v3 processor. The processor has 4 cores with 8 threads. However only one
core is detected (with two threads):
> 
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> FreeBSD/SMP: 1 package(s) x 1 core(s) x 2 SMT threads
> cpu0 (BSP): APIC ID:  0
> cpu1 (AP): APIC ID:  1
> 
> The motherboard is Supermicro X10SLM-F. All cores are enabled in BIOS and
the latest firmware is installed (version 1.1a, Build Date 08/20/2013).
I have contacted Supermicro support and they have advised me to flash the latest
BIOS but set the JPME2 jumper (Manufacturing Mode Select) and move it back after
flashing. Now the all the cores are detected:

FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
FreeBSD/SMP: 1 package(s) x 4 core(s) x 2 SMT threads

Marian