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bitbake.conf: Limit the number of OpenMP threads

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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.

(From OE-Core rev: fd2b8986aef11609123da917aaf6bcbe41f63112)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Joshua Watt
2021-04-01 09:43:29 -05:00
committed by Richard Purdie
parent e1d353880c
commit 4718aa32fa
1 changed files with 6 additions and 1 deletions
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7
meta/conf/bitbake.conf
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@@ -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 \