patches/opnfv-fuel/0033-bootstrap-Use-gzip-instead-of-xz-compression.patch

   1 From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
   2 Date: Fri, 10 Jun 2016 22:30:29 +0200
   3 Subject: [PATCH] bootstrap: Use gzip instead of xz compression.
   4
   5 bootstrap mksquashfs using qemu-user-static is extremely slow,
   6 taking up to one hour. gzip, on the other hand, is reasonably fast.
   7 According to [1], xz is slower, with not much size gain.
   8
   9 [1] https://jonathancarter.org/2015/04/06/squashfs-performance-testing/
  10
  11 Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
  12 ---
  13  .../post-scripts/80_prepare_cross_builds.sh           | 19 +++++++++++++++++++
  14  1 file changed, 19 insertions(+)
  15
  16 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
  17 index 3839d62..7ceaacc 100755
  18 --- a/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
  19 +++ b/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
  20 @@ -27,6 +27,11 @@ if which dpkg > /dev/null 2>&1; then
  21        exit 1
  22      fi
  23
  24 +    # Determine python site-packages directory location
  25 +    PYTHON_SITEPKGS_DIR=$(python -c \
  26 +      "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
  27 +    [ -d ${PYTHON_SITEPKGS_DIR} ] || exit 1
  28 +
  29      # Cross-build timeout adjustments
  30      #
  31      # Since `execute_shell_command` mcagent is used for building the target
  32 @@ -40,6 +45,20 @@ if which dpkg > /dev/null 2>&1; then
  33      # the maximum timeout value for mcagent has to be increased (use 2h).
  34      sed -i.bak -r 's/^(\s+:timeout\s*=>)\s*[[:digit:]]+$/\1 7200/' \
  35        /usr/libexec/mcollective/mcollective/agent/execute_shell_command.ddl
  36 +
  37 +    # Bootstrap: Use gzip instead of xz compression.
  38 +    #
  39 +    # bootstrap mksquashfs via `qemu-user-static` is extremely slow,
  40 +    # taking up to one hour. gzip, on the other hand, is reasonably fast.
  41 +
  42 +    # See the following article for a comparison between gzip and xz
  43 +    # https://jonathancarter.org/2015/04/06/squashfs-performance-testing/
  44 +    # xz is slower, with very little size gain.
  45 +    if [ -f ${PYTHON_SITEPKGS_DIR}/fuel_bootstrap/consts.py ]; then
  46 +      sed -i.bak -r "s/^(\s+'compress_format'\s*:\s*').*?('.*)$/\1gzip\2/g" \
  47 +        ${PYTHON_SITEPKGS_DIR}/fuel_bootstrap/consts.py
  48 +      echo "INFO: [xz] => [gzip] updated bootstrap initrd / rootfs compression."
  49 +    fi
  50    fi
  51  fi
  52