Mailinglist Archive: opensuse (2576 mails)

[cagsm <cumandgets0mem00f@xxxxxxxxx>]

On Wed, Feb 25, 2009 at 11:37 PM, John Lange <john@xxxxxxxxxxxx> wrote:
> Thanks for taking the time to reply but those links are useless. The
> information is all outdated and even what information is there does not
> mention anything about CPU frequency scaling (or "throttling", as it's
> called on one page).


you didnt look into the stuff in detail, and didnt look at powersave
command at all.


tux:~ # powersave -c
DYNAMIC

tux:~ # lscpu
Architecture:          i686
CPU(s):                2
Thread(s) per core:    1
Core(s) per socket:    2
CPU socket(s):         1
NUMA node(s):          1
Vendor ID:             AuthenticAMD
CPU family:            16
Model:                 2
Stepping:              3
CPU MHz:               1400.000
Virtualization:        AMD-V
L1d cache:             64K
L1i cache:             64K
L2 cache:              512K
L3 cache:              2048K

tux:~ # powersave --help
...
 CPUFreq modes:
         -f, --performance-speed         set cpufreq to performance mode
         -l, --powersave-speed           set cpufreq to powersave mode
         -A, --dynamic-speed             set cpufreq to dynamic mode
         -c, --cpufreq-state-info        print out the current cpufreq policy

                
tux:~ # powersave -f
tux:~ # powersave -c
PERFORMANCE

tux:~ # lscpu
Architecture:          i686
CPU(s):                2
Thread(s) per core:    1
Core(s) per socket:    2
CPU socket(s):         1
NUMA node(s):          1
Vendor ID:             AuthenticAMD
CPU family:            16
Model:                 2
Stepping:              3
CPU MHz:               2700.000
Virtualization:        AMD-V
L1d cache:             64K
L1i cache:             64K
L2 cache:              512K
L3 cache:              2048K


---------

how do you figure its useless? such big words....

powersave -f
is exactly what you are looking for. it sets the cpu to maximum
performance level, and prevents downgrading the frequency, and so on.

the cpu got from dynamic (1400mhz only during idle) to 2700mhz during
idle, so no more powersaving.
ofcourse, this all depends on your platform, cpu, chipset and whatnot.
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