[LinuxBIOS] dual core disable?

Lu, Yinghai yinghai.lu at amd.com
Mon Nov 7 21:51:29 CET 2005


That's OK, the kernel problem....

It assumes all nbcfg 54 bit is set.....with out check it.

So it could treat Node1/core0 as Node0/Core1....

YH

-----Original Message-----
From: linuxbios-bounces at openbios.org
[mailto:linuxbios-bounces at openbios.org] On Behalf Of Greg Johnson
Sent: Monday, November 07, 2005 12:22 PM
To: linuxbios at openbios.org
Subject: [LinuxBIOS] dual core disable?

Disabling dual core on our s2891 boards with Opteron 270's doesn't seem
to work properly.  When I boot with dual core disabled, I am getting two
cores on one socket enabled and none on the other socket.  Here's 
/proc/cpuinfo with dual core disabled:

p5:~# cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 33
model name      : unknown
stepping        : 2
cpu MHz         : 2010.318
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
bogomips        : 4029.78
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 33
model name      : unknown
stepping        : 2
cpu MHz         : 2010.318
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
bogomips        : 4020.90
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp


It also performs like it's using both cores on one socket.  Any
thoughts?

Thanks,

Greg


-- 
LinuxBIOS mailing list
LinuxBIOS at openbios.org
http://www.openbios.org/mailman/listinfo/linuxbios






More information about the coreboot mailing list