linux-kernel - Re: Ondemand/Conservative not working with 2.6.18

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Date:	Tue, 10 Oct 2006 23:54:42 +0300
From:	"S.Çağlar Onur" <caglar@...dus.org.tr>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	"Dave Jones" <davej@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: Ondemand/Conservative not working with 2.6.18

10 Eki 2006 Sal 02:35 tarihinde, Pallipadi, Venkatesh şunları yazmıştı: 
> What CPU is this? Pentium M?

Yes it is.

caglar@...getsu ~ $ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 13
model name      : Intel(R) Pentium(R) M processor 1.73GHz
stepping        : 8
cpu MHz         : 1733.000
cache size      : 2048 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up est tm2
bogomips        : 3460.59


> What driver was getting used in 2.6.16 kernel to change freqency?
> Acpi-cpufreq?

No, i used speedstep-centrino with 2.6.16.

> Can you please make sure you have configured in both speedstep-centrino and
> acpi-cpufreq drivers. Things should work with both these drivers so that
> the best one will be used based on your BIOS support.

I tried acpi-cpufreq but it didnt create /sys/devices/system/cpu/cpu0/cpufreq 
directory and there is no warning/error exists on dmesg.

zangetsu cpu0 # lsmod | grep acpi
acpi_cpufreq            7620  0
freq_table              4640  1 acpi_cpufreq
processor              30920  2 acpi_cpufreq,thermal
zangetsu cpu0 # lsmod | grep ondemand
cpufreq_ondemand        6604  0
zangetsu cpu0 # cd /sys/devices/system/cpu/cpu0/
zangetsu cpu0 # ls
crash_notes  topology

zangetsu cpu0 # rmmod cpufreq_ondemand
zangetsu cpu0 # rmmod acpi_cpufreq
zangetsu cpu0 # modprobe speedstep-centrino
zangetsu cpu0 # lsmod | grep speed
speedstep_centrino      8768  0
freq_table              4640  1 speedstep_centrino
processor              30920  2 speedstep_centrino,thermal
zangetsu cpu0 # lsmod | grep ondemand
cpufreq_ondemand        6604  0
zangetsu cpu0 # cd /sys/devices/system/cpu/cpu0/
zangetsu cpu0 # ls
cpufreq  crash_notes  topology
zangetsu cpu0 # cd cpufreq/
zangetsu cpufreq # echo "ondemand" > scaling_governor
zangetsu cpufreq # cat scaling_governor
ondemand
zangetsu cpufreq # cat scaling_available_frequencies
1733000 1333000 1067000 800000
zangetsu cpufreq # cat scaling_cur_freq
1733000

But frequency never changes and stays at 1.73ghz

zangetsu cpufreq # echo "powersave" > scaling_governor
zangetsu cpufreq # cat scaling_cur_freq
800000
zangetsu cpufreq # echo "performance" > scaling_governor
zangetsu cpufreq # cat scaling_cur_freq
1733000

Cheers 
-- 
S.Çağlar Onur <caglar@...dus.org.tr>
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!

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