question on CPU

[Jerry Geis <geisj@xxxxxxxxxxxxxxx>]

I have centos 5.4 on an HP laptop, as below the /proc/cpuinfo shows Dual 
core,
however, there is only 1 processor listed in /proc/cpuinfo.

Is the OS only using a single core?

jerry

------
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 17
model           : 3
model name      : AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-86
stepping        : 1
cpu MHz         : 2400.000
cache size      : 1024 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
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