Koen Kooi <koen-qlwjdigv5ablmq1fohreccpxlwaov...@public.gmane.org>
writes:
>> +# 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.
limitting the load mitigates this (high i/o increases it); e.g.
PARALLEL_MAKE = "\
...
-l ${@int(os.sysconf(os.sysconf_names['SC_NPROCESSORS_ONLN'])) * 150/100} \
"
Enrico
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