Dear All,
Sorry for disturbing, I am Tsafack Ghislain Landry, Ph.D. student at
Ecole Normale Superieure of Lyon, France. I have been trying to scale
the frequency on my Intel E5506 Xeon processor via the cpufreq_acpi
driver unfortunately (I have tested that feature using the following
linux kernel versions : 2.6.32, 2.6.38, 2.6.39, 2.6.39.3, and
3.0.rc7). This a sample output
# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
2128000
#echo 1862000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
1862000
# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
2128000
I have tried using the cpufreq-set util as well, but the result is the same.
bellow is the content of the /proc/acpi/processor/CPU0/info file. I
was wandering whether the "no" value of the parameters throttling
control, limit interface can fully explain that behavior.
cat /proc/acpi/processor/CPU0/info
processor id: 0
acpi id: 1
bus mastering control: no
power management: yes
throttling control: no
limit interface: no
Regards,
--
TSAFACK CHETSA Ghislain Landry
PhD student
INRIA RESO / LIP Laboratory
Ecole Normale Superieure de Lyon
46, allee d'Italie
Lyon Cedex 07
69364
Tel : +33 (0)4 72 72 85 77
Webpage : http://perso.ens-lyon.fr/ghislain.landry.tsafack.chetsa/
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