powerd (-adp/-hadp) strangeness on 7.2/amd64

[Alexander Motin]

Pavel Gorshkov wrote:
> Every time I create/mount or unmount/detach a MFS filesystem,
> powerd would *immediately* react with something like the
> following:
> 
>     ### mdmfs -s 200m md /mfs
> load 200%, current freq  600 MHz ( 9), wanted freq 1092 MHz
> changing clock speed from 600 MHz to 1200 MHz
> load   4%, current freq 1200 MHz ( 5), wanted freq  955 MHz
> changing clock speed from 1200 MHz to 1000 MHz
>     ### umount /mfs && mdconfig -d -u 0
> load 200%, current freq 1000 MHz ( 6), wanted freq 1910 MHz
> changing clock speed from 1000 MHz to 1982 MHz
> 
> or even
> 
> load   4%, current freq 1600 MHz ( 3), wanted freq 1519 MHz
>     ### mdmfs here
> load 100%, current freq 1600 MHz ( 3), wanted freq 4532 MHz
> 
> Is that expected behaviour? :-)

CPU load above 100% possible for SMP systems, it just sum from all CPUs.
Wanted freqs above maximum are also possible, when `hiadaptive` profile
is used.

Probably NFS creates some significant load while mounting.

-- 
Alexander Motin