22 Nov
2014
22 Nov
'14
1:37 p.m.
Hi Will,
[..]
Eventually I found the cause. Going from linux kernel
3.2 to 3.16 :(
This, apparently, does very aggressive CPU frequency scaling. Drop back to 3.2
and all is sweetness and light again.
The question is whether there is a reasonably straightforward way to stop this
behaviour. Doing the usual searches doesn't seem to turn up anything useful.
Any help gratefully appreciated.
I would add that I've double checked that the bios is set for 'performance'.
Just a shot in the dark here, but did you try using the "cpufreq-set" tool (in
Debian-based distributions: in package "cpufrequtils) to set the CPU governor?
(As root), do:
# cpufreq-set -g performance
On an older machine, I had Xrun issues sometimes, and this tool helped overcome
it at that time. However, I have never seen the CPU load spikes you mention.
Greetings,
Frank