HP Integrity MC990 X User Manual page 36

For information, see Enabling CPU frequency scaling systems without the intel_pstate directory
on page 35.
2. Decide which governor setting is suitable for your site.
ondemand is the default setting. HPE recommends that you change this to a site-specific setting and
that you configure the governor to performance.
The possible power governor settings are:
Governor setting
Effect
ondemand
Dynamically switches between the available CPUs if at 95% of CPU load. Default.
HPE does not recommend this setting. Consider using the performance setting.
performance
Runs the CPUs at the maximum frequency.
HPE recommends this setting.
conservative
Dynamically switches between the available CPUs if at 75% of CPU load.
powersave
Runs the CPUs at the minimum frequency.
userspace
Runs the CPUs at user-specified frequencies.
3. Use one of the following platform-specific methods to change the setting:
• On RHEL 7 platforms, complete the following steps:
a. Enter the following command:
# cpupower frequency-set -g governor
For governor, specify the setting you chose in the previous step.
b. Enter the following command and verify that the governor setting you specified appears in the
cpupower command output in the current policy field:
# cpupower frequency-info
c. To ensure that the governor setting persists across reboots, enter the following command:
# systemctl enable cpupower
• On RHEL 6 platforms, complete the following steps:
a. Open file /etc/sysconfig/cpuspeed.
b. Search for the GOVERNOR= string.
c. Edit the setting, adding the governor setting you chose in the previous step.
d. Save and close the file.
e. Enter the following command:
# service cpuspeed restart
f. To ensure that the governor setting persists across reboots, use a text editor to edit the /etc/
init.d/after.local file, add the following line, and then save and close the file:
36 Using the Foundation Software