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-rw-r--r--documentation/yocto-project-qs/yocto-project-qs.xml30
1 files changed, 12 insertions, 18 deletions
diff --git a/documentation/yocto-project-qs/yocto-project-qs.xml b/documentation/yocto-project-qs/yocto-project-qs.xml
index 8fe9b766e6..f21558ebbd 100644
--- a/documentation/yocto-project-qs/yocto-project-qs.xml
+++ b/documentation/yocto-project-qs/yocto-project-qs.xml
@@ -509,15 +509,17 @@
509 </para> 509 </para>
510 510
511 <para> 511 <para>
512 Another couple of variables of interest are the 512 Another three variables of interest are the
513 <ulink url='&YOCTO_DOCS_REF_URL;#var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></ulink> and the 513 <ulink url='&YOCTO_DOCS_REF_URL;#var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></ulink>,
514 <ulink url='&YOCTO_DOCS_REF_URL;#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink> variables. 514 <ulink url='&YOCTO_DOCS_REF_URL;#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink>,
515 By default, these variables are set to the number of processor 515 and
516 cores your build host uses. 516 <ulink url='&YOCTO_DOCS_BB_URL;#var-BB_NUMBER_PARSE_THREADS'><filename>BB_NUMBER_PARSE_THREADS</filename></ulink>
517 However, if your build host uses multiple processor cores, 517 variables.
518 you should increase these settings to twice the number of 518 By default, these variables are optimally set based on the
519 cores used. 519 number of processor cores your build host uses.
520 Doing so can significantly shorten your build time. 520 Although it is possible to override these variables, the
521 default values the OpenEmbedded build system derives provide you
522 with parallelism during the build.
521 </para> 523 </para>
522 524
523 <para> 525 <para>
@@ -898,18 +900,10 @@
898 <filename>conf/local.conf</filename> configuration file 900 <filename>conf/local.conf</filename> configuration file
899 in the Build Directory. 901 in the Build Directory.
900 You need to manually edit this file to specify the machine you 902 You need to manually edit this file to specify the machine you
901 are building and to optimize your build time. 903 are building:
902 Here are the minimal changes to make:
903 <literallayout class='monospaced'> 904 <literallayout class='monospaced'>
904 BB_NUMBER_THREADS = "8"
905 PARALLEL_MAKE = "-j 8"
906 MACHINE ?= "beaglebone" 905 MACHINE ?= "beaglebone"
907 </literallayout> 906 </literallayout>
908 Briefly, set
909 <ulink url='&YOCTO_DOCS_REF_URL;#var-BB_NUMBER_THREADS'><filename>BB_NUMBER_THREADS</filename></ulink>
910 and
911 <ulink url='&YOCTO_DOCS_REF_URL;#var-PARALLEL_MAKE'><filename>PARALLEL_MAKE</filename></ulink> to
912 twice your host processor's number of cores.
913 </para> 907 </para>
914 908
915 <para> 909 <para>