Messages in this thread | | | Date | Mon, 16 Feb 2004 21:48:25 +0000 | From | dual_bereta_r0x <> | Subject | Re: 2.6.2: P4 ClockMod speed |
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Dominik Brodowski wrote: > Hi, > > >>I have a P4 2.4 running @ 3.12GHz. > > > So you overclock your CPU but then throttle it down... strange, but well...
Actually it isn't throttled down, only sysfs is showing it with low speed. It *is* running @ 3.12 (or /proc/cpuinfo and boot messages are lying to me) when in full power.
>>In 2.6.0, i could change it frequency >>via speedfreqd(8) up to its actual speed. Since 2.6.1, its max speed is >>locked on cpu *real* speed. > > > It's just a change of appearance -- the cpufreq driver uses the theoretical > speed of the CPU for its calculations; the actual CPU speed isn't > affected. You can verify this by looking at /proc/cpuinfo which still tells > 3124.376 MHz. > > By doing so it becomes easier to enter different frequencies e.g. into > /sys/devices/system/cpu/cpufreq/scaling_setspeed -- on my desktop, typing in > 1200000 is easier than 12121224... [*]
Sure but if i want to downgrade it, for example, by night, to a lower speed, and then next day return it to full power? Will I stuck at 2.4GHz?
> Dominik > > [*] The _actual_ CPU speed should be used on all cpufreq drivers where this > specific CPU frequency has implications to external components, e.g. LCD, > memory or pcmcia devices. Where only the _frequency ratio_ is of importance > [for loops_per_jiffy and friends] such "rounding" is acceptable, as long as > the ratio is constant.
Indeed. I'll showing in LCD a lower speed than the running.
-- dual_bereta_r0x -- Alexandre Hautequest ArenaNetwork Lan House & Cyber -- www.arenanetwork.com.br
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