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

[Steffen Sledz]

On 29.01.2014 11:59, Richard Purdie wrote:
> On Wed, 2014-01-29 at 11:14 +0100, Steffen Sledz wrote:
>> On 27.01.2014 15:39, Richard Purdie 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.
>>
>> On our Fedora-18 build host this change leads to the following exception. :(
> 
> Do you have:
> 
> http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=721773072da08cf0f5e1206961ada3083b6722b4

No.

But now it becomes really interesting. As mentioned before it works well on our openSUSE-13.1 build host (without this commit)???

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