Please enable the performance CPU governor

James - do we want todo this more generally on charms that target hardware? i.e. is this applicable for ceph-osd and neutron-gateway as well?

James Page <email address hidden> writes:

> James - do we want todo this more generally on charms that target
> hardware? i.e. is this applicable for ceph-osd and neutron-gateway as
> well?

In an unconverged setting it probably doesn't make as much sense for
ceph-OSD, IMO. I don't think ceph uses much CPU except during
rebulds. (And in converged, it'd be done by nova-compute, so it's
moot.)

OTOH, it definitely makes sense to do it on neutron-gateway, IMO.

--
James

The Ubuntu distro default is 'performance':

| $ grep -E '^CONFIG_CPU_FREQ_DEFAULT' /boot/config-$(uname -r)
| CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y

FWIW, I have been able to set 'performance' by just disabling the 'ondemand' service with the following:

systemd:

| sudo systemctl mask ondemand.service

upstart:

| sudo update-rc.d ondemand disable

Of course, this requires rebooting unless you run something like:

| for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do sudo sh -c "echo performance > $i"; done