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dev-manual, ref-manual, yocto-project-qs: Updates to parallelism variables

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The way the old manual set had worded the use of the
BB_NUMBER_THREADS, PARALLEL_MAKE, and BB_NUMBER_PARSE_THREADS
had become depricated.  It suggested a lot of user intervention
to get these variables set to have the build system utilize
optimal parallelism.  The change a while back to the build system
where the variables are set to the number of build host cores
now makes the variables automatically be set to their best
values.  I have gone through the manual set and changed wordings
appropriately to reflect this.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
(From yocto-docs rev: 3a27b1792c92a2f22173315e2732f672cdad2c78)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark
2015-01-19 14:14:19 -08:00
committed by Richard Purdie
parent 0a367c514b
commit 4ab132a20d
5 changed files with 33 additions and 50 deletions
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documentation/ref-manual/closer-look.xml
+7 -8
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@@ -162,9 +162,10 @@
<itemizedlist>
<listitem><para><emphasis>Parallelism Options:</emphasis>
Controlled by the
<link linkend='var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></link>
<link linkend='var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></link>,
<link linkend='var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></link>,
and
<link linkend='var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></link>
<ulink url='&YOCTO_DOCS_BB_URL;#var-BB_NUMBER_PARSE_THREADS'><filename>BB_NUMBER_PARSE_THREADS</filename></ulink>
variables.</para></listitem>
<listitem><para><emphasis>Target Machine Selection:</emphasis>
Controlled by the
@@ -216,12 +217,10 @@
For example, suppose you had several build environments and
they shared some common features.
You can set these default build properties here.
A good example is perhaps the level of parallelism you want
to use through the
<link linkend='var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></link>
and
<link linkend='var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></link>
variables.</para>
A good example is perhaps the packaging format to use
through the
<link linkend='var-PACKAGE_CLASSES'><filename>PACKAGE_CLASSES</filename></link>
variable.</para>
<para>One useful scenario for using the
<filename>conf/site.conf</filename> file is to extend your
<link linkend='var-BBPATH'><filename>BBPATH</filename></link>