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| author | Scott Rifenbark <scott.m.rifenbark@intel.com> | 2014-01-29 12:23:29 -0600 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-02-11 12:01:31 +0000 |
| commit | ec0f9cf85a67b6ab0589958b68191940ce7125a5 (patch) | |
| tree | fc06b7a1aab20ca93a872561bd11af3c32901b7c /documentation | |
| parent | beb54ff6f7cc305ea01315c844bd5b7f0ca24e91 (diff) | |
| download | ast2050-yocto-poky-ec0f9cf85a67b6ab0589958b68191940ce7125a5.zip ast2050-yocto-poky-ec0f9cf85a67b6ab0589958b68191940ce7125a5.tar.gz | |
ref-manual: Updates to BB_NUMBER_THREADS and PARALLEL_MAKE.
Noted that if these variables are not set, they both default
to the number of cores the build system has.
(From yocto-docs rev: 8654aeb91f734628bffda9d5de0cdc9ea27d3f67)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation')
| -rw-r--r-- | documentation/ref-manual/ref-variables.xml | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml index 2e59e49..ea00098 100644 --- a/documentation/ref-manual/ref-variables.xml +++ b/documentation/ref-manual/ref-variables.xml @@ -547,9 +547,18 @@ <glossentry id='var-BB_NUMBER_THREADS'><glossterm>BB_NUMBER_THREADS</glossterm> <glossdef> - <para>The maximum number of tasks BitBake should run in parallel at any one time. - If your host development system supports multiple cores, a good rule of thumb - is to set this variable to twice the number of cores.</para> + <para> + The maximum number of tasks BitBake should run in parallel + at any one time. + If your host development system supports multiple cores, + a good rule of thumb is to set this variable to twice the + number of cores. + </para> + + <para> + The default value for <filename>BB_NUMBER_THREADS</filename> + is equal to the number of cores your build system has. + </para> </glossdef> </glossentry> @@ -4792,9 +4801,14 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3" <filename>-j 4</filename>, where the number represents the maximum number of parallel threads make can run. + </para> + + <para> If you development host supports multiple cores a good rule of thumb is to set this variable to twice the number of cores on the host. + If you do not set <filename>PARALLEL_MAKE</filename>, it + defaults to the number of cores your build system has. <note> Individual recipes might clear out this variable if the software being built has problems running its |
