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build: add load average limit to reduce CPU overcommitment

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For make and ninja based build systems, no new jobs are started if the load
average is greater than number_of_cores * 1.5.
This commit is contained in:
Andre Heider 2019-12-27 16:08:54 +01:00
parent f58d0c7a0b
commit 2d12b7ebe8
3 changed files with 14 additions and 8 deletions
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19
config/functions
View File

@ -250,19 +250,26 @@ setup_toolchain() {
# parallel # parallel
if flag_enabled "parallel" "yes"; then if flag_enabled "parallel" "yes"; then
NINJA_OPTS="$NINJA_OPTS -j$CONCURRENCY_MAKE_LEVEL" NINJA_OPTS="-j$CONCURRENCY_MAKE_LEVEL"
export MAKEFLAGS="-j$CONCURRENCY_MAKE_LEVEL" MAKEFLAGS="-j$CONCURRENCY_MAKE_LEVEL"
else else
NINJA_OPTS="$NINJA_OPTS -j1" NINJA_OPTS="-j1"
export MAKEFLAGS="-j1" MAKEFLAGS="-j1"
fi fi
# verbose flag # verbose flag
if flag_enabled "verbose" "no"; then if flag_enabled "verbose" "no"; then
NINJA_OPTS="$NINJA_OPTS -v" NINJA_OPTS+=" -v"
export MAKEFLAGS="$MAKEFLAGS V=1 VERBOSE=1" MAKEFLAGS+=" V=1 VERBOSE=1"
fi fi
# average load limit
if [ "${CONCURRENCY_LOAD}" != "0" ]; then
NINJA_OPTS+=" -l${CONCURRENCY_LOAD}"
MAKEFLAGS+=" -l${CONCURRENCY_LOAD}"
fi
export MAKEFLAGS
case "$1:$2" in case "$1:$2" in
target:meson) target:meson)
export DESTIMAGE="target" export DESTIMAGE="target"

2
config/optimize
View File

@ -1,8 +1,6 @@
# Linker hash-style is set to gnu via gcc default # Linker hash-style is set to gnu via gcc default
LD_OPTIM="-Wl,--as-needed" LD_OPTIM="-Wl,--as-needed"
NINJA_OPTS=""
TARGET_CPPFLAGS="" TARGET_CPPFLAGS=""
TARGET_CFLAGS="$TARGET_CFLAGS -Wall -pipe $PROJECT_CFLAGS" TARGET_CFLAGS="$TARGET_CFLAGS -Wall -pipe $PROJECT_CFLAGS"
TARGET_CXXFLAGS="$TARGET_CFLAGS" TARGET_CXXFLAGS="$TARGET_CFLAGS"

1
config/options
View File

@ -77,6 +77,7 @@ VERBOSE="${VERBOSE:-yes}"
# Try values between 1 and number of processor cores present. # Try values between 1 and number of processor cores present.
# default: use all cores # default: use all cores
[ -z "${CONCURRENCY_MAKE_LEVEL}" ] && export CONCURRENCY_MAKE_LEVEL=$(nproc) [ -z "${CONCURRENCY_MAKE_LEVEL}" ] && export CONCURRENCY_MAKE_LEVEL=$(nproc)
[ -z "${CONCURRENCY_LOAD}" ] && export CONCURRENCY_LOAD=$(python3 -c "import os; print('%.2f' % (os.cpu_count() * 1.5))")
# cache size for ccache # cache size for ccache
# Set the maximum size of the files stored in the cache. You can specify a # Set the maximum size of the files stored in the cache. You can specify a