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| author |   Scott Rifenbark <scott.m.rifenbark@intel.com> | 2014-03-21 06:38:21 -0600 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-03-25 12:29:44 +0000 |
| commit | ef627f855d5409051567ddbf3cba7d9be1ab4979 (patch) | |
| tree | beda3d1633ca2a694c5d188f2076270718b7e525 /documentation | |
| parent | 32890f29afd9bd93e22c325cdc24466982fb80a6 (diff) | |
| download | openembedded-core-contrib-ef627f855d5409051567ddbf3cba7d9be1ab4979.tar.gz | |
yocto-project-qs, ref-manual: Fixed core number defaults
Fixes [YOCTO #2528]
The defaults for BB_NUMBER_THREADS and PARALLEL_MAKE are now
automatically set to the build host's number of processor cores.
I updated the "Building and Image" section in the Quick Start
to state that. I also updated the PARALLEL_MAKE variable.
(From yocto-docs rev: 2069c96d2410605c089da4eede2c7b4f9a7b704a)
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 | 7 | ||||
| -rw-r--r-- | documentation/yocto-project-qs/yocto-project-qs.xml | 11 |
2 files changed, 9 insertions, 9 deletions
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml index 8e4f1793bb..a0f53713b0 100644 --- a/documentation/ref-manual/ref-variables.xml +++ b/documentation/ref-manual/ref-variables.xml @@ -5132,10 +5132,9 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3" command during the <filename>do_compile</filename> task in order to specify parallel compilation on the local build host. - This variable is usually in the form - <filename>-j 4</filename>, where the number - represents the maximum number of parallel threads make can - run. + This variable is usually in the form "-j <x>", + where x represents the maximum number of parallel threads + <filename>make</filename> can run. </para> <para> diff --git a/documentation/yocto-project-qs/yocto-project-qs.xml b/documentation/yocto-project-qs/yocto-project-qs.xml index 96e207349d..2419fcf570 100644 --- a/documentation/yocto-project-qs/yocto-project-qs.xml +++ b/documentation/yocto-project-qs/yocto-project-qs.xml @@ -502,11 +502,12 @@ Another couple of variables of interest are the <ulink url='&YOCTO_DOCS_REF_URL;#var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></ulink> and the <ulink url='&YOCTO_DOCS_REF_URL;#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink> variables. - By default, these variables are commented out. - However, if you have a multi-core CPU you might want to uncomment - the lines and set both variables equal to twice the number of your - host's processor cores. - Setting these variables can significantly shorten your build time. + By default, these variables are set to how ever many processor + cores your build host uses. + However, if your build host uses multiple processor cores, + you should increase these settings to twice the number of + cores used. + Doing so can significantly shorten your build time. </para> <para> |