On 10/29/2012 08:33 PM, Steven Nikkel wrote:
I'm running a long duration CPU-centric process that will gobble up all
available CPU time. I have it set to run at nice +20. While it's running
I've noticed other processes have a hard time getting CPU time and run
their activites very slowly. The processes I've noticed issues with are
IO involved, but they don't appear to be IO blocked as they run
dramatically faster and use much more CPU time when the CPU intensive
process is not running. I haven't noticed issues with other processes,
but I haven't been looking. If I push my CPU intensive process into idle
priority 1, all the other processes return to their normal behaviour as
if it's not running.
This seems to be a specific behaviour on this one machine running
9.0-RELEASE-p4 on an Atom 330 dual core. I've tried with and without
hyperthreading enabled with no noticeable change in behaviour.
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I will likely irritate some people, but you could try the 4BSD
scheduler, see if that gives you better results.
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