Uncertain if quad-core processor recognised

[walawa]

Hi,
I've been using Ubuntu on with an Intel Quad-Core Q6600, but I am currently starting to doubt if all four cores are recognized. I noticed this when I launched Conky and it said that I was trying to monitor more cores than I had. I then went to system monitor and I realized it only shows one core. I checked the BIOS and all four cores are shown and enabled.

I ran "cat /proc/cpuinfo" :

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 15
model name    : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
stepping    : 11
cpu MHz        : 2399.950
cache size    : 4096 KB
physical id    : 0
siblings    : 1
core id        : 0
cpu cores    : 1
apicid        : 0
initial apicid    : 0
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 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc up arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips    : 4799.90
clflush size    : 64
power management:

I'm not fully sure how to interpret this, but 1 is under cpu cores.

I'm not certain, but I think this may have something to do with updating from 8.04 to 8.10. After the upgrade I noticed the system was slower than before and now I've just noticed what I mentioned above. Another possibility would be that I recently installed Windows on a separate partition. Windows is also pretty slow, but it isn't necessary to me so I don't really mind. Could any of these things be what's causing my problem?

Is there a way to check if Ubuntu recognizes my processor, and if not how can I fix this?

[blueridgedog]

What is the output of

sudo lshw -class cpu

[walawa]

Here's th ouput:

*-cpu                   
       description: CPU
       product: Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
       vendor: Intel Corp.
       physical id: 4
       bus info: cpu@0
       version: 6.15.11
       serial: 0000-06FB-0000-0000-0000-0000
       slot: Socket 775
       size: 600MHz
       width: 64 bits
       clock: 66MHz
       capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx x86-64 constant_tsc up arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
       configuration: id=0
     *-logicalcpu:0
          description: Logical CPU
          physical id: 0.1
          width: 64 bits
          capabilities: logical
     *-logicalcpu:1
          description: Logical CPU
          physical id: 0.2
          width: 64 bits
          capabilities: logical
     *-logicalcpu:2
          description: Logical CPU
          physical id: 0.3
          width: 64 bits
          capabilities: logical
     *-logicalcpu:3
          description: Logical CPU
          physical id: 0.4
          width: 64 bits
          capabilities: logical

[blueridgedog]

Well, it sees them there...

You can install sysstat with:

sudo apt-get install systat

Then run:

mpstat -P ALL

Which should give you a list of the load of each core.

[igknighted]

Each "core" is listed as a separate processor. So each core only has one core, but there should be four CPUs (CPU0-CPU3)

[bettlebrox]

"cat /proc/cpu" should list all of your cores. If if it only shows one core then your kernel is only using one core.

Which kernel & version are you using? The output of "uname -a" will display that info.

Any recent kernels that Ubuntu should be multi-core/smp aware, so it's possible this is a misconfiguration somewhere.

[walawa]

mpstat -P ALL:

Linux 2.6.27-9-generic (tristan-desktop) 	07/02/09 	_i686_

01:07:05 PM  CPU   %user   %nice    %sys %iowait    %irq   %soft  %steal   %idle    intr/s
01:07:05 PM  all   19.38    0.11    3.88    1.59    0.31    0.18    0.00   74.55    509.53
01:07:05 PM    0   19.38    0.11    3.88    1.59    0.31    0.18    0.00   74.55    332.08

uname -a:

Linux tristan-desktop 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 GNU/Linux

The output of "cat /proc/cpu" is "no such file or directory". Why is this?

[blueridgedog]

Odd...mpstat is only showing one cpu. Perhaps another forum member can post a better tool.

[anders_c_]

its supposed to be:
cat /proc/cpuinfo

[walawa]

cat /proc/cpuinfo:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
stepping	: 11
cpu MHz		: 2399.950
cache size	: 4096 KB
physical id	: 0
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 0
initial apicid	: 0
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 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc up arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips	: 4799.90
clflush size	: 64
power management: