Hi,
Benjamin Herrenschmidt wrote:
>
> > The time reported by xpmumon and klaptopd have increased by some estimated
> > 10%. (from 180 Min to 200 Min.)
> >
> > As far as I can tell, it runs as fine. I will report any trouble.
>
> Can you change #undef DEBUG_FREQ to #define DEBUG_FREQ in pmac_cpufreq.c ?
>
> That will force the driver to recalc the bogomips on speed change. Once
> done, check that the recalculated bogomips changes to about 600 at
> low speed and back to about 800 when running at full speed.
I got a question here. I have a 700MHz iBook 2.2 and I wonder whether
it scales the cpu frequency dynamically based on load and policy.
Ie:
17:19 root@bart:/home/viktor # echo 0:0:700000:performance > /proc/cpufreq
17:20 root@bart:/home/viktor # cat /proc/cpufreq
minimum CPU frequency - maximum CPU frequency - policy
CPU 0 400000 kHz ( 57 %) - 700000 kHz (100 %) - performance
17:20 root@bart:/home/viktor # cat /proc/cpuinfo
cpu : 750FX
temperature : 36 C (uncalibrated)
clock : 700MHz
revision : 1.2 (pvr 7000 0102)
bogomips : 1389.36
machine : PowerBook4,3
motherboard : PowerBook4,3 MacRISC2 MacRISC Power Macintosh
board revision : 00000001
detected as : 257 (iBook 2 rev. 2)
pmac flags : 0000000b
L2 cache : 512K unified
memory : 256MB
pmac-generation : NewWorld
17:20 root@bart:/home/viktor # echo 0:0:700000:powersave > /proc/cpufreq
17:21 root@bart:/home/viktor # cat /proc/cpufreq
minimum CPU frequency - maximum CPU frequency - policy
CPU 0 400000 kHz ( 57 %) - 700000 kHz (100 %) - powersave
17:21 root@bart:/home/viktor # cat /proc/cpuinfo
cpu : 750FX
temperature : 38 C (uncalibrated)
clock : 400MHz
revision : 1.2 (pvr 7000 0102)
bogomips : 793.92
machine : PowerBook4,3
motherboard : PowerBook4,3 MacRISC2 MacRISC Power Macintosh
board revision : 00000001
detected as : 257 (iBook 2 rev. 2)
pmac flags : 0000000b
L2 cache : 512K unified
memory : 256MB
pmac-generation : NewWorld
Note the difference in the clock speed and bogomips counter. So static
scaling seems to work.
However, when I generate load in the powersave mode, the clock speed and
bogomips count stay the same. The only difference I see is in the cpu
temperature, which starts to climb very fast. Is this an indication of
higher cpu speed? Or is it still clocked at 400MHz?
Ciao,
Viktor
>
> Ben.
>
>
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--
Viktor Rosenfeld
WWW: http://www.informatik.hu-berlin.de/~rosenfel/
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