[cfarm-users] peko, please 'nice' your jobs

Stefan Ring stefan at complang.tuwien.ac.at
Mon Mar 26 16:19:55 CEST 2018

On Mon, Mar 26, 2018 at 3:56 PM, Jonathan Wakely via cfarm-users
<cfarm-users at lists.tetaneutral.net> wrote:
> I can't remember ever using gcc112 when it wasn't running several jobs
> for "peko", all run without nice.
> Please remember these are shared machines, and running jobs
> back-to-back all day, every day doesn't seem necessary.

Unfortunately, nice buys you close to nothing on machines with
multiple virtual threads per core (Hyper Threading or SMT), and the
POWER machines are heavily multi-threaded. So the only good remedy is
to start fewer simultaneous jobs than there are physical cores in a

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