[oe-commits] Richard Purdie : local.conf.sample: Add automatic defaults for BB_NUMBER_THREADS and PARALLEL_MAKE

[git at git.openembedded.org]

Module: openembedded-core.git
Branch: master
Commit: 99777f60342ce1371e3960661035ca7cd89f96f5
URL:    http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=99777f60342ce1371e3960661035ca7cd89f96f5

Author: Richard Purdie <richard.purdie at linuxfoundation.org>
Date:   Mon Jan 27 14:39:48 2014 +0000

local.conf.sample: Add automatic defaults for BB_NUMBER_THREADS and PARALLEL_MAKE

Its rather sad that people don't appear to read local.conf and then complain
about slow builds when they're just using a single thread. Most systems have
more than one core now so we might as well use a more automatic default
for these values. This may lead to better experiences for new users.

[YOCTO #2528]

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

---

 meta/conf/local.conf.sample | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample
index c977129..1d893af 100644
--- a/meta/conf/local.conf.sample
+++ b/meta/conf/local.conf.sample
@@ -18,12 +18,18 @@
 # option determines how many tasks bitbake should run in parallel:
 #
 #BB_NUMBER_THREADS ?= "4"
+#
+# Default to setting automatically based on cpu count
+BB_NUMBER_THREADS ?= "${@oe.utils.cpu_count()}"
 # 
 # The second option controls how many processes make should run in parallel when
 # running compile tasks:
 #
 #PARALLEL_MAKE ?= "-j 4"
 #
+# Default to setting automatically based on cpu count
+PARALLEL_MAKE ?= "-j ${@oe.utils.cpu_count()}"
+#
 # For a quad-core machine, BB_NUMBER_THREADS = "4", PARALLEL_MAKE = "-j 4" would
 # be appropriate for example.