On Thursday 12 June 2003 16:06, Benjamin Herrenschmidt wrote:
> 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.
Now this is strange. While I am compiling the new kernel with gcc-3.3
(gcc-3.2 throws an internal error since the latest upgrade) I checked
whether the BogoMips change. This is a compilation where DEBUG_FREQ was
_not_ set. However, see yourself:
tomcat:~# cat /proc/cpufreq
minimum CPU frequency - maximum CPU frequency - policy
CPU 0 400000 kHz (100 %) - 400000 kHz (100 %) - performance
tomcat:~# cat /proc/cpuinfo
cpu : 7410, altivec supported
temperature : 19-21 C (uncalibrated)
clock : 400MHz
revision : 17.3 (pvr 800c 1103)
bogomips : 797.90
machine : PowerBook3,2
motherboard : PowerBook3,2 MacRISC2 MacRISC Power Macintosh
detected as : 71 (PowerBook Titanium)
pmac flags : 0000000b
L2 cache : 1024K unified
memory : 384MB
pmac-generation : NewWorld
tomcat:~# echo -n "0%0%0%powersave" > /proc/cpufreq
tomcat:~# cat /proc/cpufreq
minimum CPU frequency - maximum CPU frequency - policy
CPU 0 300000 kHz ( 75 %) - 300000 kHz ( 75 %) - powersave
tomcat:~# cat /proc/cpuinfo
cpu : 7410, altivec supported
temperature : 21-25 C (uncalibrated)
clock : 300MHz
revision : 17.3 (pvr 800c 1103)
bogomips : 598.42
machine : PowerBook3,2
motherboard : PowerBook3,2 MacRISC2 MacRISC Power Macintosh
detected as : 71 (PowerBook Titanium)
pmac flags : 0000000b
L2 cache : 1024K unified
memory : 384MB
pmac-generation : NewWorld
The bogomips number seems to get recalculated even without the DEBUG_FREQ
set.
Salut
Mark
P.S. in Documentation/cpufreq the ppc platform does not evet get mentioned.
--
Krisztian Mark Szentes
produktivIT - Open-Source Solution Provider
Siebenbrunnengasse 55/7
A-1050 Wien
