Ubuntu

Ubuntu 7.04 system monitor thinks that I have two CPUs!

Asked by Mike K

This is an odd one. I had no problems with the system monitor with Ubuntu 6.06, but 7.04 thinks that I have two processors.
System/Admin/System Monitor/ System shows two 3.00GHz Pentium 4s. The graphical display of CPU activity (Resources) shows two curves. The last time I looked into the box there was only one cpu there :-) and 6.06 identified this correctly. Motherboard is an Asus P4P8X SE and the two different OSs are on plug-in hard disks – the bios remains identical.

This is not really a problem, but it is a nuisance and something as basic as this should not be happening. It make you wonder if there are not other, more subtle bugs, waiting to manifest themselves.

What's going on? Is there any way to correct this?

Many thanks in advance,
Mike

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Solved by:
François Tissandier
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Revision history for this message
Jacob Torrey (ranok) said : 		#1

When you cat /proc/cpuinfo, does it show only one processor? If not, then it might be a bug in the system monitor, otherwise a glitch in the hardware detection.

Revision history for this message
Mike K (michael-kirk) said : 		#2

Hullo Jacob,

This is what I get from your suggestion:

mkirk@mkirk-desktop:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 9
cpu MHz : 2999.184
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 cid xtpr
bogomips : 6002.67

mkirk@mkirk-desktop:~$

Does that mean zero processors?! Or, does the count go 0, 1 ,2, etc.?

Regards,
Mike

Revision history for this message
marcobra (Marco Braida) (marcobra) said : 		#3

I have only one processor .not. core duo and here my cat /proc/cpuinfo

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Celeron(R) CPU 2.66GHz
stepping : 1
cpu MHz : 2660.284
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
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 lm constant_tsc up pni monitor ds_cpl tm2 cid cx16 xtpr
bogomips : 5325.26
clflush size : 64

HTH

Revision history for this message
Mike K (michael-kirk) said : 		#4

It seems that the count starts at zero (i.e. one processor). It would be nice to know what all those other parameters mean.

Mike

Revision history for this message
Best François Tissandier (baloo) said : 		#5

The hyperthreading option makes you see two processor. Nothing abnormal. I have a PIV 2.8Ghz, and I see two also. So to me it's quite fine, it would be abnormal to see one I think...

Revision history for this message
Mike K (michael-kirk) said : 		#6

Thanks François Tissandier, that solved my question.