PHC on i7 mobile

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neXyon
Posts: 1
Joined: Thu 15. Apr 2010, 17:25

PHC on i7 mobile

Post by neXyon » Thu 15. Apr 2010, 17:46

Hi!

I just bough a brand new lenovo laptop with an i7-620LM processor. That is a dual core processor with HT so you get 4 cpus to work with. I've setup arch linux.

I then tried to get PHC running and first everything seemed nice. Then I ran the PHD optimization script that runs cpuburn while lowering the vids. It got down to -1 where it aborted because of an invalid value and finished with 0 being the perfect value for cpu0 @ maximum frequency (that is 2GHz).

So next I tried to set all vids to 0, ie:

Code: Select all

cat /sys/devices/system/cpu/cpu*/cpufreq/phc_vids
0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0
The system still runs fine... So I guess that PHC is not working really?

I don't know what info would be helpful, but this might (I set the vids back to the default values before running the command):

Code: Select all

# for file in $(find -iname "phc*"); do echo $file; cat $file; echo; done
./cpu0/cpufreq/phc_version
0.3.2:2

./cpu0/cpufreq/phc_vids
16 15 14 13 12 11 10 9 

./cpu0/cpufreq/phc_default_vids
16 15 14 13 12 11 10 9 

./cpu0/cpufreq/phc_fids
0 0 0 0 0 0 0 0 

./cpu0/cpufreq/phc_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu0/cpufreq/phc_default_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu1/cpufreq/phc_version
0.3.2:2

./cpu1/cpufreq/phc_vids
16 15 14 13 12 11 10 9 

./cpu1/cpufreq/phc_default_vids
16 15 14 13 12 11 10 9 

./cpu1/cpufreq/phc_fids
0 0 0 0 0 0 0 0 

./cpu1/cpufreq/phc_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu1/cpufreq/phc_default_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu2/cpufreq/phc_version
0.3.2:2

./cpu2/cpufreq/phc_vids
16 15 14 13 12 11 10 9 

./cpu2/cpufreq/phc_default_vids
16 15 14 13 12 11 10 9 

./cpu2/cpufreq/phc_fids
0 0 0 0 0 0 0 0 

./cpu2/cpufreq/phc_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu2/cpufreq/phc_default_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu3/cpufreq/phc_version
0.3.2:2

./cpu3/cpufreq/phc_vids
16 15 14 13 12 11 10 9 

./cpu3/cpufreq/phc_default_vids
16 15 14 13 12 11 10 9 

./cpu3/cpufreq/phc_fids
0 0 0 0 0 0 0 0 

./cpu3/cpufreq/phc_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9 

./cpu3/cpufreq/phc_default_controls
0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:9
Regards

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