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pakkypnut
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PostPosted: Mon Sep 20, 2004 12:10 am    Post subject: processor running at half speed? Reply with quote

currently running 2004.2 on an oldworld with a sonnet g3 450 upgrade cpu, info centre reports it running at 192Mhz, any particular reason for this? how can I get it to run full speed if the info centre is correct?

ideas.. anyone?
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linuxopjemac
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PostPosted: Mon Sep 20, 2004 5:25 am    Post subject: Reply with quote

I think you can chose an option in the kernel parameters, to have G3 cache enabled (don't know where though)...I read it somewhere

look here for example (google with g3 cache kernel)
http://mail-index.netbsd.org/port-macppc/2002/09/22/0006.html
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pakkypnut
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PostPosted: Wed Sep 22, 2004 9:32 am    Post subject: Reply with quote

Well, after checking /proc/sys/kernel/l2cr, the cache is up and running (+2 clock and 1Mb) the cpuinfo still reports it running at 195Mhz. I have enabled cpu scaling in a new kernel build - still no change. (if there is some way to activate scaling please tell me - i haven't a clue :( ). any ways I off into the big blue to see if I can hunt down some more clues.

any help would be appreciated
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toojays
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PostPosted: Wed Sep 22, 2004 11:48 am    Post subject: Reply with quote

If your kernel+cpu supports frequency scaling, you should be able to find something about it in /sys/devices/system/cpu/cpu0/cpufreq/. To set maximum frequency, the way is:
Code:
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
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linuxopjemac
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PostPosted: Thu Sep 23, 2004 7:52 am    Post subject: Reply with quote

Quote:
If your kernel+cpu supports frequency scaling, you should be able to find something about it in /sys/devices/system/cpu/cpu0/cpufreq/. To set maximum frequency, the way is: Code:
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor


Yes, I have frequency scaling also compiled in and I run cpudnyd which makes my computer run at lower freqency when possible and revert backt to higher when needed. So on my TiBook is hops from 400 to 300 MHz and back. You might have a look at http://rockhopper.dk
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pakkypnut
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PostPosted: Thu Sep 23, 2004 9:53 am    Post subject: Reply with quote

after building several kernels with different options enabled for the processor, it seems that scaling on my cpu is not supported., nowhere can i find the

/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
or
/proc/cpufreq

they are just not there
conclusion: no scaling I'm stuck with cpuinfo reporting 195Mhz :(

However, After trawling through this board, I finally came upon the info I needed - as long as my bogomips showed about right, then the cpu is running at about the right speed, just being reported wrong, now very happy :D

(fyi, my bogomips is currently reading 897.02 - which is about right for a g3 450Mhz)

incidently, PMU nor ACPI is not supported on my mac - may explain lack of cpufreq also

cheers, thanks for the feedback
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linuxopjemac
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PostPosted: Thu Sep 23, 2004 10:31 am    Post subject: Reply with quote

Quote:
However, After trawling through this board, I finally came upon the info I needed


which thread ?
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pakkypnut
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PostPosted: Thu Sep 23, 2004 9:28 pm    Post subject: Reply with quote

Can't exactly remember the thread, I did a quick search using key words in the hope I would find what I needed. pretty much a hit and miss affair, but it was on the ppc board. sorry I couldn't be more help. :)
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pakkypnut
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PostPosted: Thu Sep 23, 2004 9:39 pm    Post subject: Reply with quote

I think the thread was:

G3 upgrade/Clockspeed question.


made me feel better, knowing I am not alone.....
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