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
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