Two Guys Arguing


Posted in hardware by youngnh on 03.06.09

While putting together my answers for all of the computing power currently available to me, I came across something interesting. My primary computer is a Thinkpad T42 running Fedora 10. It has an Intel Pentium M, and according to the ‘About This Computer’ dialog, its clocked at 1.7GHz.

Imagine my surprise when I ran cat /proc/cpuinfo and found this:

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.70GHz
stepping : 6
cpu MHz : 600.000
cache size : 2048 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 mce cx8 mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe up bts est tm2
bogomips : 1196.11
clflush size : 64
power management:

600MHz!!?? Turns out my CPU, like most Intel CPUs have frequency scaling to cut down on power consumption and heat production when you don’t need all the raw horsepower. I must have caught my processor sleeping. The cpuspeed daemon will help you scale your CPUs frequency as it is needed. Something to think about when you’re wondering if everything is running just a tad bit slower than you think it should.


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