Saul Wold <sgw-VuQAYsv1563Yd54FQh9/c...@public.gmane.org> writes:
>> #PARALLEL_MAKE = "-j 4"
>> #
>> -# For a quad-core machine, BB_NUMBER_THREADS = "4", PARALLEL_MAKE = "-j 4"
>> would
>> -# be appropriate for example.
>> -
>> +# If you have a multi-core machine, you would normally set both of these
>> variables
>> +# to twice the number of cores. So for a quad-core machine, it would be
>> appropriate
>> +# to set BB_NUMBER_THREADS = "8" and PARALLEL_MAKE = "-j 8".
>
> I think adding a note to ensure that hyperthreading is enabled would
> be appropriate, then number of threads = number of hyperthreaded cores
> (4 vs 8).
what about a general
| BB_NUMBER_THREADS ??=
"${@os.sysconf(os.sysconf_names['SC_NPROCESSORS_ONLN'])}"
in bitbake.conf? Or the sqrt() of it in in both PARALLEL_MAKE and
BB_NUMBER_THREADS...
Enrico
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