On 2004-05-01, Micha Feigin <[EMAIL PROTECTED]> wrote: > On Fri, Apr 30, 2004 at 04:48:24PM +0000, 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, 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? >> > > I don't know how accurate it is but you could try bogomips. It doesn't > report cpu frequency but the bogomips value which is a measure of the > cpu speed (I don't know what the values are). It should let you know > the relative speed of the cpu.
bogomips suggests that the right reading is the one on /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed, but I still don't notice any cooling. I cut it down even more with /proc/acpi/processor/CPU0/throttling (with both powersave cpufreq and acpi throttling at 62%, bogomips are at 180, as opposed to 2084 at full throttle and with the performance cpufreq governor). I have the impression that the fan fires up less frequently, but no hard data on this. Thanks anyway -- Ivan Fernández [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
