Op 27 jan. 2014, om 15:39 heeft Richard Purdie <richard.pur...@linuxfoundation.org> het volgende geschreven:
> Its rather sad that people don't appear to read local.conf and then complain > about slow builds when they're just using a single thread. Most systems have > more than one core now so we might as well use a more automatic default > for these values. This may lead to better experiences for new users. > > [YOCTO #2528] > > Signed-off-by: Richard Purdie <richard.pur...@linuxfoundation.org> > --- > diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample > index 71856b8..36d33e1 100644 > --- a/meta/conf/local.conf.sample > +++ b/meta/conf/local.conf.sample > @@ -18,12 +18,18 @@ > # option determines how many tasks bitbake should run in parallel: > # > #BB_NUMBER_THREADS ?= "4" > +# > +# Default to setting automatically based on cpu count > +BB_NUMBER_THREADS ?= "${@oe.utils.cpu_count()}" I've noticed that after 4 threads IO becomes a big bottleneck when you have things like webkit, qt, asio etc in the buildqueue. Combine that with issues like every make -j thread taking >2GB ram with asio and webkit this default seems a bit high. I'd use 0.5*numcpu with a lower bound of 2. regards, Koen > # > # The second option controls how many processes make should run in parallel > when > # running compile tasks: > # > #PARALLEL_MAKE ?= "-j 4" > # > +# Default to setting automatically based on cpu count > +PARALLEL_MAKE ?= "-j ${@oe.utils.cpu_count()}" > +# > # For a quad-core machine, BB_NUMBER_THREADS = "4", PARALLEL_MAKE = "-j 4" > would > # be appropriate for example. > > > > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.openembedded.org/mailman/listinfo/openembedded-core > _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core