diff options
author | Joshua Watt <JPEWhacker@gmail.com> | 2021-04-01 09:43:29 -0500 |
---|---|---|
committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2021-04-05 15:28:25 +0100 |
commit | fd2b8986aef11609123da917aaf6bcbe41f63112 (patch) | |
tree | c4a4c952c355d67b3dd520aca045cd2939e96e9e /meta/conf | |
parent | 5c6a585347199c099700b93405f511971f5fe26d (diff) | |
download | openembedded-core-fd2b8986aef11609123da917aaf6bcbe41f63112.tar.gz |
bitbake.conf: Limit the number of OpenMP threads
Limits the number of OpenMP threads to match BB_NUMBER_THREADS. This
prevents OpenMP (libgomp in particular) from falling back to using all
the available CPUs, which behaves poorly when attempting to limit build
usage, especially when attempting to build in a container.
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/conf')
-rw-r--r-- | meta/conf/bitbake.conf | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf index d87d7cafb6..385fc7dd55 100644 --- a/meta/conf/bitbake.conf +++ b/meta/conf/bitbake.conf @@ -810,6 +810,10 @@ XZ_THREADS ?= "${@oe.utils.cpu_count(at_least=2)}" XZ_DEFAULTS ?= "--memlimit=${XZ_MEMLIMIT} --threads=${XZ_THREADS}" XZ_DEFAULTS[vardepsexclude] += "XZ_MEMLIMIT XZ_THREADS" +# Limit the number of threads that OpenMP libraries will use. Otherwise they +# may fallback to using all CPUs +export OMP_NUM_THREADS = "${BB_NUMBER_THREADS}" + ################################################################## # Magic Cookie for SANITY CHECK ################################################################## @@ -891,7 +895,8 @@ BB_HASHEXCLUDE_COMMON ?= "TMPDIR FILE PATH PWD BB_TASKHASH BBPATH BBSERVER DL_DI WARN_QA ERROR_QA WORKDIR STAMPCLEAN PKGDATA_DIR BUILD_ARCH SSTATE_PKGARCH \ BB_WORKERCONTEXT BB_LIMITEDDEPS BB_UNIHASH extend_recipe_sysroot DEPLOY_DIR \ SSTATE_HASHEQUIV_METHOD SSTATE_HASHEQUIV_REPORT_TASKDATA \ - SSTATE_HASHEQUIV_OWNER CCACHE_TOP_DIR BB_HASHSERVE GIT_CEILING_DIRECTORIES" + SSTATE_HASHEQUIV_OWNER CCACHE_TOP_DIR BB_HASHSERVE GIT_CEILING_DIRECTORIES \ + OMP_NUM_THREADS" BB_HASHBASE_WHITELIST ?= "${BB_HASHEXCLUDE_COMMON} PSEUDO_IGNORE_PATHS BUILDHISTORY_DIR SSTATE_DIR " BB_HASHCONFIG_WHITELIST ?= "${BB_HASHEXCLUDE_COMMON} DATE TIME SSH_AGENT_PID \ SSH_AUTH_SOCK PSEUDO_BUILD BB_ENV_EXTRAWHITE DISABLE_SANITY_CHECKS \ |