Fedora Core 6 on Xeon Quad Core

baddah · 11-14-2007, 09:01 AM

Hi,

I've recently installed FC6 on a Xeon Quad Core,but it looks like Fedora is only picking up two core.

Code:

[root@localhost src]# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            3040  @ 1.86GHz
stepping        : 2
cpu MHz         : 1596.000
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 3736.58

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            3040  @ 1.86GHz
stepping        : 2
cpu MHz         : 1596.000
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 3733.73

IS their any extra programs/procedures i should use for Fedora to see all 4 cores?

Thanks

jay73 · 11-15-2007, 06:54 PM

Who says it's only picking up two? When I check the output you posted, I see two CPUs with 2 cores each = 4 cores. That's what Intel Quads are: two dual cores welded together.

baddah · 11-18-2007, 08:54 AM

Hi,

Thanks for the reply.I saw the cpu cores as 2 on each processor, and at first i figured it must be 2x2 = 4 cores,but then i saw this output.(From another server we have running AMD Dual Core).

Code:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 107
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
stepping        : 1
cpu MHz         : 2304.864
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc [6]
bogomips        : 4613.42

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 107
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
stepping        : 1
cpu MHz         : 2304.864
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc [6]
bogomips        : 4609.61

This is a dual core,and the output looks similiar,so no i'm not sure.Am i missing something, cause from what i can see these two outputs look exactly the same.

Thanks

jay73 · 11-18-2007, 09:09 AM

OK, I see. Does your BIOS recognize all four?