Back in c/s 18950 the default cpufreq governor was set to userspace (it
had previously been performance). However, since there is no supplied
userspace program or script that will change the frequency this is at
best a no-op. Worse, on some hardware with some BIOS revisions, this
actually sets the CPUs running at their lowest frequency rather than
their highest and there is a corresponding (and initially puzzling) drop
in performance.
This patch changes the default governor to "ondemand" which should make
it the same as the Linux default and will provide power savings for the
majority without needing to write a userspace governor. For those that
want to install their own governor, that is still possible.
Signed-off-by: John Haxby <john.haxby@xxxxxxxxxx>
Attachment:
xen-set-default-omdemand.patch
Description: Text Data
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