cpufrequtils governor is not working as expected to set performance mode from ondemand

[Prabhuraj K]

Requirement is to set the cpufrequtils to performance from ondemand on compute node, this is handled by code in fuel-library.

Process during deployment :

1. Package named "cpufrequtils" got installed
2. File "/etc/default/cpufrequtils" got created with content "GOVERNOR=performance"
3. Service is ensured to present in next boot but service is not restarted.

I have checked the value of my cpufrequtils using following commands:

1. root@compute01:~# grep MHz /proc/cpuinfo
cpu MHz : 1200.000
cpu MHz : 1200.000
cpu MHz : 1200.000
cpu MHz : 1200.000

2. root@compute01:~# cat /etc/default/cpufrequtils
GOVERNOR="performance"

3. root@compute01:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
ondemand

root@compute01:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
conservative ondemand userspace powersave performance

when I restart/reload the cpufrequtils , the value of CPU MHz is changed to 2500 from 1200, again i rebooted my machine and check this value still it showws me 1200 after reboot. When i check the rc3.d found that ondemand is making this value to set 1200 from 2500 . SO cpufrequtils is setting the value to 2500 and end ondemand reset the value to 1200.

So, I have disabled ondemand on next reboot , Then it works fine and I call see the value as 2500 and performance set for all cpu as below.

 root@compute01:~# grep MHz /proc/cpuinfo
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000
cpu MHz : 2500.000

root@compute01:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
performance

This need to fix in fuel-library on
 "fuel-library/deployment/puppet/openstack_tasks/manifests/roles/compute.pp"

[Prabhuraj K (prabhuraj)]

https://review.openstack.org/397459

[Prabhuraj K (prabhuraj)]

Fix for Mitaka is committed for review https://review.openstack.org/397459

[Prabhuraj K (prabhuraj)]

Fix for newton for code review https://review.openstack.org/#/c/397471/

[Prabhuraj K (prabhuraj)]

Code is awaiting for review

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/457470

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ocata
Review: https://review.openstack.org/460107

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andreas Jaeger (<email address hidden>) on branch: stable/mitaka
Review: https://review.opendev.org/397459
Reason: This repo is retired now, no further work will get merged.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andreas Jaeger (<email address hidden>) on branch: stable/newton
Review: https://review.opendev.org/397471
Reason: This repo is retired now, no further work will get merged.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andreas Jaeger (<email address hidden>) on branch: master
Review: https://review.opendev.org/457470
Reason: This repo is retired now, no further work will get merged.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andreas Jaeger (<email address hidden>) on branch: stable/ocata
Review: https://review.opendev.org/460107
Reason: This repo is retired now, no further work will get merged.