documentation/yocto-project-qs/yocto-project-qs.xml: multi-core update

Added text suggesting that BB_NUMBER_THREADS be set to twice the number
of available processor cores and that PARALLEL_MAKE be set equal to the
number of processor cores.  Similar changes were made to local.conf
based on work by Josh.

(From yocto-docs rev: e342a4af4d3ba000b348bbb9d125977fc0e95273)

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 2011-06-20 09:39:54 -07:00 committed by Richard Purdie
parent 377acfc4fc
commit 54f43b6648
1 changed files with 4 additions and 2 deletions

View File

@ -288,8 +288,10 @@
<para> <para>
Take some time to examine your <filename>conf/local.conf</filename> file. Take some time to examine your <filename>conf/local.conf</filename> file.
The defaults should work fine. The defaults should work fine.
However, if you have a multi-core CPU you might want to set the variables However, if you have a multi-core CPU you might want to set the variable
BB_NUMBER_THREADS and PARALLEL_MAKE to the number of processor cores on your build machine. BB_NUMBER_THREADS equal to twice the number of processor cores your system has.
And, set the variable PARALLEL_MAKE equal to the number of processor cores.
Setting these variables can significantly shorten your build time.
By default, these variables are commented out. By default, these variables are commented out.
</para> </para>
<para> <para>