Re: measuring cpu frequency

[hugo vanwoerkom <hvw59601@care2.com>]

Ivan Fernandez wrote:
> OK, I've been trying to set up cpu frequency scaling in my Dell Inspiron
> 5150 (3.06GHz Mobile Pentium 4, debian testing and 2.6.5 kernel).  I
> seem to have everything in place, cpu frequency scaling compiled into
> the kernel, together with performance and powersave governors, userspace
> governor as default, frequency tables helpers too, and the p4-clockmod
> module as driver.  All the relevant files show up under
> /sys/devices/system/cpu/cpu0/cpufreq/ and the userspace daemon I use to
> switch frequencies (powernowd) loads and apparently changes frequencies
> alright.
>
> My problem is that I can notice no cooling at all, CPU temperature is
> around 70C most of the time, 

this is probably off-base, but are you cooling your box by drawing in 
air? I discovered when I went on the cputemp kick, that by drawing IN 
air with a fan the cputemp drops by 10 degrees.

just as the same as before enabling the
> whole cpufreq thing.  I don't know how to measure real frequency:
> the numbers that show on /proc/cpuinfo match with
> /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed, but x86info -mhz
> (which reads from /dev/cpu/0/cpuid, I believe, shows a different clock
> speed (higher, either around 1500 MHz or, most of the time, the full
> 3.06 GHz).  Which one should I trust?  Is there any other way to measure
> cpu speed accurately?
>
> Thanks