This patch makes it possible to build python3 with profile directed
optimization. That is, feed python build process with profile data to
guide optimization. This is the third (and the last) step in profile
directed optimization for Python 3.x.
In order to do a profile-optimized build you need to specify
PYTHON3_PROFILE_OPT = "1" in your local.conf, and, have profile data available
in the location pointed to by PYTHON3_PROFILE_DIR. Profile data can be
obtainen e.g. by running bitbake python-pgo-image -c profile3.
[YOCTO #9338]
Signed-off-by: Markus Lehtonen <markus.lehto...@linux.intel.com>
---
meta/recipes-devtools/python/python3_3.5.3.bb | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/meta/recipes-devtools/python/python3_3.5.3.bb
b/meta/recipes-devtools/python/python3_3.5.3.bb
index bb524eb17d..844139dfa3 100644
--- a/meta/recipes-devtools/python/python3_3.5.3.bb
+++ b/meta/recipes-devtools/python/python3_3.5.3.bb
@@ -79,6 +79,17 @@ export CROSSPYTHONPATH =
"${STAGING_LIBDIR_NATIVE}/python${PYTHON_MAJMIN}/lib-dy
# No ctypes option for python 3
PYTHONLSBOPTS = ""
+# Automatic profile guided optimization
+PYTHON3_MAKE_TARGET ?= "${@'build_all_use_profile' if
d.getVar('PYTHON3_PROFILE_OPT', True) == '1' else ''}"
+PYTHON3_PROFILE_DIR ?= "${@'${TMPDIR}/work-shared/${MACHINE}/python3/pgo-data'
if d.getVar('PYTHON3_PROFILE_OPT', True) == '1' else ''}"
+python () {
+ if (d.getVar('PYTHON3_PROFILE_OPT', True) == '1' and
+ d.getVar('PYTHON3_MAKE_TARGET', True) == 'build_all_use_profile'):
+ profile_dir = d.getVar('PYTHON3_PROFILE_DIR', True)
+ bb.utils.mkdirhier(profile_dir)
+ d.setVarFlag('do_compile', 'file-checksums', '%s:True' % profile_dir)
+}
+
do_configure_append() {
rm -f ${S}/Makefile.orig
autoreconf -Wcross --verbose --install --force --exclude=autopoint
../Python-${PV}/Modules/_ctypes/libffi
@@ -118,6 +129,10 @@ do_compile() {
if [ "${PYTHON3_MAKE_TARGET}" = "build_all_generate_profile" ]; then
# This is only used in PGO profiling by python3-profile-opt package
export EXTRA_CFLAGS="-fprofile-dir=./python3-pgo-profiles/"
+ elif [ -n "${PYTHON3_PROFILE_DIR}" ]; then
+ export EXTRA_CFLAGS="-fprofile-dir=${PYTHON3_PROFILE_DIR}"
+ # Remove non-optimized build artefacts
+ oe_runmake clean
fi
oe_runmake HOSTPGEN=${STAGING_BINDIR_NATIVE}/python3-native/pgen \
@@ -138,6 +153,11 @@ do_install() {
install -d ${D}${libdir}/pkgconfig
install -d ${D}${libdir}/python${PYTHON_MAJMIN}/config
+ # This only has effect if we build with -fprofile-use, e.g. when make
+ # target is build_all_use_profile
+ if [ -n "${PYTHON3_PROFILE_DIR}" ]; then
+ export EXTRA_CFLAGS="-fprofile-dir=${PYTHON3_PROFILE_DIR}"
+ fi
# rerun the build once again with original makefile this time
# run install in a separate step to avoid compile/install race
oe_runmake HOSTPGEN=${STAGING_BINDIR_NATIVE}/python3-native/pgen \
--
2.13.6
--
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