On Wed, Jun 02, 2010 at 08:04:20PM -0400, Benjamin Reed wrote:
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> On 6/2/10 7:55 PM, Jack Howarth wrote:
> > One possible workaround might be to change gcc45.info
> > to reduce the number of parallel builds so that the
> > load sensitivity is reduced. So instead of using...
> >
> > num_cpu=$(echo `sysctl -n hw.ncpu`)
> > make -j $num_cpu
> >
> > we would reduce num_cpu by one if greater
> > than one so that the build is either serial
> > or leaves a free core whenever building in parallel.
> > This won't 'fix' the problem but it might make
> > it less likely.
>
> So if GCC's build is not repeatably compatible with -jN, then it
> should probably not be doing it by default. :P
This is a recent regression upstream. The question is do you
penalize all users with multiple core machines for those
unlucky users running two cores at high load? As I said before,
a rational (and less extreme) workaround would be to leave
a free core available to reduce the load on the machine.
I build gcc trunk nightly and have never seen this failure
on a dual quad.
Jack
>
> - --
> Benjamin Reed a.k.a. Ranger Rick a.k.a. Raccoon Fink
> Fink, KDE, and Mac OS X development
>
> Blog: http://www.raccoonfink.com/
> Music: http://music.raccoonfink.com/
>
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