[distcc] Distributed compiling

Martin Pool mbp at sourcefrog.net
Thu Jan 19 08:57:12 GMT 2006

On 18 Jan 2006, Dan Kegel <dank at kegel.com> wrote:
> On 1/18/06, Martin Pool <mbp at sourcefrog.net> wrote:
> > > > There is a TODO that distccd should reject jobs if the machine's load
> > > > average is too high.
> > >
> > > I have a patch that implements this if you want it.
> >
> > Could you resend it please?
> Thing is, I'm not sure it's really useful yet.
> At the moment, it rejects jobs if the system runqueue is
> above the target number of jobs already picked by distccd.
> This causes jobs to be rejected a bit too easily.
> I should probably have a commandline parameter to set the
> threshold (e.g. --reject_job_threshold=0 would reject jobs if
> there were more than the target number of tasks running,
> --reject_job_threshold=1 wouldn't reject until there was one
> more than the target number of tasks running, etc)
> but I haven't tried it yet.
> I did try making the decision based on the one-minute load
> average, but that did not perform well; it let overload really
> rack up before the limit kicked in.

I was thinking of load average, but thought it might have that problem.
If you've tried it and it didn't work well then it's probably not worth
putting in.

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