[OE-core] [PATCH] local.conf.sample: Add automatic defaults for BB_NUMBER_THREADS and PARALLEL_MAKE

[Laszlo Papp]

Thank you for this contribution.

As a side note, please consider the documentation bits in the future
as well. :-) I have just opened a separate ticket for that here:

https://bugzilla.yoctoproject.org/show_bug.cgi?id=5770

On Mon, Jan 27, 2014 at 2:39 PM, Richard Purdie
<richard.purdie at linuxfoundation.org> wrote:
> 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.purdie at 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()}"
>  #
>  # 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.
>
>
>
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