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Add script for performing compilation size regression investigations. #15303

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tzarc committed Nov 26, 2021
commit e6e0b2d4953b0d8cfdc13fb9f2558202404ad51c
59 changes: 51 additions & 8 deletions util/size_regression.sh
Original file line number Diff line number Diff line change
@@ -1,26 +1,69 @@
#!/bin/bash

if [[ -z $1 ]] ; then
echo "Usage: $0 planck/rev6:default"
set -eEuo pipefail

source_ref="0.11.0"
dest_ref="develop"
ignore_ref="master"

function usage() {
echo "Usage: $(basename "$0") [-s <source>] [-d <dest>] [-u] planck/rev6:default"
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echo " -s <source> : use source commit, branch, tag, or sha1 to start the search"
echo " defaults to \`$source_ref\`."
echo " -d <dest> : use destination commit, branch, tag, or sha1 to end the search"
echo " defaults to \`$dest_ref\`."
echo " -i <ignore> : the branch to ignore refs from"
echo " defaults to \`$ignore_ref\`."
exit 1
}

if [[ ${#} -eq 0 ]]; then
usage
fi

while getopts "s:d:i:" opt "$@" ; do
case "$opt" in
s) source_ref="${OPTARG:-}";;
d) dest_ref="${OPTARG:-}";;
i) ignore_ref="${OPTARG:-}";;
\?) usage >&2; exit 1;;
esac
done

# Work out the target board
shift $((OPTIND-1))
keyboard_target=$1

last_size=0
last_line=""
function build_executor() {
git rev-list --oneline --no-merges 0.11.0...upstream/develop ^upstream/master | while IFS= read -r line ; do
git rev-list --oneline --no-merges ${source_ref}...${dest_ref} ^${ignore_ref} | while IFS= read -r line ; do
revision=$(echo $line | cut -d' ' -f1)

make distclean >/dev/null 2>&1
git checkout $revision >/dev/null 2>&1
make -j $keyboard_target >/dev/null 2>&1
file_size=$(arm-none-eabi-size .build/*.elf | awk '/elf/ {print $1}')
git checkout $revision >/dev/null 2>&1 || { echo "Failed to check out revision ${revision}" >&2 ; exit 1 ; }
make -j $keyboard_target >/dev/null 2>&1 || true
file_size=$(arm-none-eabi-size .build/*.elf 2>&1 | awk '/elf/ {print $1}' 2>&1 || true)

printf "%8d -- %s\n" "$file_size" "$line"
if [[ "$last_size" == 0 ]] ; then last_size=$file_size ; fi
if [[ -z "$file_size" ]] ; then file_size=0 ; fi

if [[ -n "$last_line" ]] ; then
size_delta=$(( $last_size - $file_size ))
printf "Size: %8d, delta: %+6d -- %s\n" "$last_size" "$size_delta" "$last_line"
fi

last_size=$file_size
last_line=$line
done
}

if [ -n "$last_line" ] ; then
size_delta=0
printf "Size: %8d, delta: %+6d -- %s\n" "$last_size" "$size_delta" "$last_line"
fi

# The actual execution of all the builds needs to be the last command in the entire script
# - During builds, this script file will disappear, so we need the entire script to be
# loaded into the script interpreter at the time of execution. Do not refactor.
build_executor
build_executor