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documentation: BB_NUMBER_THREADS and PARALLEL_MAKE suggestions

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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>
This commit is contained in:
Scott Rifenbark
2011-11-16 09:42:53 -08:00
committed by Richard Purdie
parent 4cb3862f6a
commit affc8b985a
4 changed files with 11 additions and 14 deletions
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2
documentation/poky-ref-manual/ref-variables.xml
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@@ -927,7 +927,7 @@
This variable is usually in the form <filename>-j 4</filename>, where the number
represents the maximum number of parallel threads make can run.
If you development host supports multiple cores a good rule of thumb is to set
this variable to one and a half times the number of cores on the host.</para>
this variable to twice the number of cores on the host.</para>
</glossdef>
</glossentry>