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authorScott Rifenbark <scott.m.rifenbark@intel.com>2011-11-16 09:42:53 -0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-11-25 15:24:19 +0000
commitaffc8b985a6b059424ae67e230cdc1f1215c9977 (patch)
treeb1166d0bc8f7f4416783251c9a55976af530e7f1 /documentation/yocto-project-qs
parent4cb3862f6a1190ab3bf94bc827231e8ddabb8c62 (diff)
downloadpoky-affc8b985a6b059424ae67e230cdc1f1215c9977.tar.gz
documentation: BB_NUMBER_THREADS and PARALLEL_MAKE suggestions
Text that suggests setting the BB_NUMBER_THREADS and PARALLEL_MAKE variables to speed build time has been updated to suggest a setting of twice the number of host cores supported. The 2x number came to light through a discussion on the project mailing list initiated by Robert P. J. Day. Reported-by: Robert P. J. Day (From yocto-docs rev: 1846b41a595b7bd905ca828eaa04112d1533d7a1) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation/yocto-project-qs')
-rw-r--r--documentation/yocto-project-qs/yocto-project-qs.xml5
1 files changed, 1 insertions, 4 deletions
diff --git a/documentation/yocto-project-qs/yocto-project-qs.xml b/documentation/yocto-project-qs/yocto-project-qs.xml
index fcbf3a1847..23e097b20f 100644
--- a/documentation/yocto-project-qs/yocto-project-qs.xml
+++ b/documentation/yocto-project-qs/yocto-project-qs.xml
@@ -410,11 +410,8 @@
410 <ulink url='http://www.yoctoproject.org/docs/latest/poky-ref-manual/poky-ref-manual.html#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink> variables. 410 <ulink url='http://www.yoctoproject.org/docs/latest/poky-ref-manual/poky-ref-manual.html#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink> variables.
411 By default, these variables are commented out. 411 By default, these variables are commented out.
412 However, if you have a multi-core CPU you might want to uncomment 412 However, if you have a multi-core CPU you might want to uncomment
413 the lines and set the variable 413 the lines and set both variables equal to twice the number of your
414 <filename>BB_NUMBER_THREADS</filename> equal to twice the number of your
415 host's processor cores. 414 host's processor cores.
416 Also, you could set the variable <filename>PARALLEL_MAKE</filename> equal to
417 1.5 times the number of processor cores.
418 Setting these variables can significantly shorten your build time. 415 Setting these variables can significantly shorten your build time.
419 </para> 416 </para>
420 417