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From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
Date: Fri, 10 Jun 2016 22:30:29 +0200
Subject: [PATCH] bootstrap: Use gzip instead of xz compression.
bootstrap mksquashfs using qemu-user-static is extremely slow,
taking up to one hour. gzip, on the other hand, is reasonably fast.
According to [1], xz is slower, with not much size gain.
[1] https://jonathancarter.org/2015/04/06/squashfs-performance-testing/
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
---
.../post-scripts/80_prepare_cross_builds.sh | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh b/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
index 3839d62..7ceaacc 100755
--- a/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
+++ b/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
@@ -27,6 +27,11 @@ if which dpkg > /dev/null 2>&1; then
exit 1
fi
+ # Determine python site-packages directory location
+ PYTHON_SITEPKGS_DIR=$(python -c \
+ "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
+ [ -d ${PYTHON_SITEPKGS_DIR} ] || exit 1
+
# Cross-build timeout adjustments
#
# Since `execute_shell_command` mcagent is used for building the target
@@ -40,6 +45,20 @@ if which dpkg > /dev/null 2>&1; then
# the maximum timeout value for mcagent has to be increased (use 2h).
sed -i.bak -r 's/^(\s+:timeout\s*=>)\s*[[:digit:]]+$/\1 7200/' \
/usr/libexec/mcollective/mcollective/agent/execute_shell_command.ddl
+
+ # Bootstrap: Use gzip instead of xz compression.
+ #
+ # bootstrap mksquashfs via `qemu-user-static` is extremely slow,
+ # taking up to one hour. gzip, on the other hand, is reasonably fast.
+
+ # See the following article for a comparison between gzip and xz
+ # https://jonathancarter.org/2015/04/06/squashfs-performance-testing/
+ # xz is slower, with very little size gain.
+ if [ -f ${PYTHON_SITEPKGS_DIR}/fuel_bootstrap/consts.py ]; then
+ sed -i.bak -r "s/^(\s+'compress_format'\s*:\s*').*?('.*)$/\1gzip\2/g" \
+ ${PYTHON_SITEPKGS_DIR}/fuel_bootstrap/consts.py
+ echo "INFO: [xz] => [gzip] updated bootstrap initrd / rootfs compression."
+ fi
fi
fi
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