[LAU] Cpu scaling on performance, permanent

[rosea.grammostola]

On 05/22/2011 04:32 PM, Robin Gareus wrote:
> On 05/22/2011 04:25 PM, rosea.grammostola wrote:
>> jack_cpu , is that a jack2 only tool? I don't have it here.
> I suppose it is.
>
> Alternatively
>   cd /tmp/
>   git clone git://rg42.org/jackfreqd
>   cd jackfreq/tools
>   gcc -o busyjack busyjack.c -ljack
>   ./busyjack 60
>
> ciao,
> robin
*
$ cpufreq-info
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq at vger.kernel.org, please.
analyzing CPU 0:
   driver: acpi-cpufreq
   CPUs which run at the same hardware frequency: 0 1
   CPUs which need to have their frequency coordinated by software: 0
   maximum transition latency: 10.0 us.
   hardware limits: 800 MHz - 2.00 GHz
   available frequency steps: 2.00 GHz, 2.00 GHz, 1.60 GHz, 1.20 GHz, 
800 MHz
   available cpufreq governors: userspace, powersave, conservative, 
ondemand, performance
   current policy: frequency should be within 800 MHz and 1.20 GHz.
                   The governor "userspace" may decide which speed to use
                   within this range.
   current CPU frequency is 800 MHz.
   cpufreq stats: 2.00 GHz:0.00%, 2.00 GHz:0.00%, 1.60 GHz:0.00%, 1.20 
GHz:62.46%, 800 MHz:37.54%  (636)
analyzing CPU 1:
   driver: acpi-cpufreq
   CPUs which run at the same hardware frequency: 0 1
   CPUs which need to have their frequency coordinated by software: 1
   maximum transition latency: 10.0 us.
   hardware limits: 800 MHz - 2.00 GHz
   available frequency steps: 2.00 GHz, 2.00 GHz, 1.60 GHz, 1.20 GHz, 
800 MHz
   available cpufreq governors: userspace, powersave, conservative, 
ondemand, performance
   current policy: frequency should be within 800 MHz and 1.20 GHz.
                   The governor "userspace" may decide which speed to use
                   within this range.
   current CPU frequency is 800 MHz.
   cpufreq stats: 2.00 GHz:0.00%, 2.00 GHz:0.00%, 1.60 GHz:0.00%, 1.20 
GHz:71.02%, 800 MHz:28.98%  (753)

*
My cpu switches from

800000
800000

to

1200000
1200000

*
/tmp/jackfreqd/tools$ ./busyjack 60
set DSP load = 60.00
initial loopsize 25000 iterations
using chunksize of 10485760 bytes
SSE2 detected
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
xrun occured with loop size = 25000
loopsize = 25750
loopsize = 25493
loopsize = 25239
loopsize = 24987
loopsize = 24738
loopsize = 24491
loopsize = 24247
loopsize = 24005
loopsize = 23765
loopsize = 23528


\r