I use centos 6.4 64. I have old proc – CPU AMD Phenom II X4 810 (HDX810W) 2.6 GHz. However, when I execute the command cat /proc/cpuinfo
I get the following:
processor : 0
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : AMD Phenom(tm) II X4 810 Processor
stepping : 2
cpu MHz : 800.000
cache size : 512 KB
physical id : 0
...
All four cores have the same speed 800 MHz. How to explain it?
Best Answer
That's the current CPU frequency; it can be scaled up and down.
Have a look in
/sys/devices/system/cpu/cpu0
(or 1, 2, 3), then thecpufreq
directory.Check
cat scaling_governor
. It is probablyondemand
(I believe that's the default kernel configuration). Now checkscaling_available_frequencies
; you'll see a list that for you should start with 2600000.The kernel will boost the frequency when required. Try a busy loop, with bash:
Let that go and check your frequencies. They should go up. If you have a CPU monitor and one of them hits close to 100%, that core will probably be at the max frequency now.