CPU scaling

CPU scaling tool kits can be downloaded from

ftp://partners.redhat.com/a166eabc5cf5df158922f9b06e5e7b21/hwcert/RHEL7/

 

To setup the packages, follow the sequence below to avoid package dependency issues

dt > lmbench > kernel > stress > hwcert-client >

To run the tests

hwcert-backend run --test=cpuscaling

 

mkdir /root/cpuscale

mkdir /root/cpuscale/hwcert

 

cp /usr/share/hwcert/lib/hwcert/*.py /root/cpuscale/hwcert

cp /usr/share/hwcert//tests/cpuscaling/*.py /root/cpuscale/

 

 

CPU power state info inquiry

cpupower -c all frequency-info

 

References

Linux动态频率调节系统CPUFreq之一：概述 

http://blog.csdn.net/droidphone/article/details/9346981

 

Linux动态频率调节系统CPUFreq之二：核心（core）架构与API 

http://blog.csdn.net/droidphone/article/details/9385745

 

Linux动态频率调节系统CPUFreq之三：governor 

http://blog.csdn.net/droidphone/article/details/9532999

 

 Linux kernel source code for CPU freq control

drivers/cpufreq/intel_pstate.c

 

intel_pstate_max_pstate()

intel_pstate_turbo_pstate()

intel_pstate_min_pstate()

intel_pstate_calc_busy()

intel_pstate_sample()

 

 Intel BIOS Implementation Test Suite

http://biosbits.org/

 

 Ways to identify CPUID via windbg

kd> .formats 306a9
Evaluate expression:
  Hex:     000306a9
  Decimal: 198313
  Octal:   00000603251
  Binary:  00000000 00000011 00000110 10101001
  Chars:   ....
  Time:    Sat Jan 03 15:05:13 1970
  Float:   low 2.77896e-040 high 0
  Double:  9.79796e-319

 

stepping ID: 1001

model: 1010

family ID: 0110

processor type: 00

extended model ID: 0011

extended family ID: 0000 0000

 

family 0000 0000 0110, model 0011 1010, stepping 1001

family 6, model 58, stepping 9