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Add support for Propeller Optimization #359

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Add support for Propeller Optimization #359

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c3677a9
Add support for Propeller Optimization
ptr1337 Dec 16, 2024
5ac0ba8
Add support for Propeller Optimization
ptr1337 Dec 16, 2024
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30 changes: 30 additions & 0 deletions linux-cachyos-rc/PKGBUILD
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Original file line number Diff line number Diff line change
Expand Up @@ -154,6 +154,18 @@ _autofdo=${_autofdo-}
# Name for the AutoFDO profile
_autofdo_profile_name=${_autofdo_profile_name-}

# Propeller should be applied, after the kernel is optimized with AutoFDO
# Workflow:
# 1. Proceed with above AutoFDO Optimization, but enable at the final compilation also _propeller
# 2. Boot into the AutoFDO Kernel and profile it
# 3. Convert the profile into the propeller profile, example:
# create_llvm_prof --binary=/usr/src/debug/linux-cachyos-rc/vmlinux --profile=propeller.data --format=propeller --propeller_output_module_name --out=/home/ptr1337/bench/propeller_cc_profile.txt --propeller_symorder=/home/ptr1337/bench/propeller_ld_profile.txt
# 4. Place the propeller_cc_profile.txt and propeller_ld_profile.txt into the sourcedir
# 5. Enable _propeller_prefix
_propeller=${_propeller-}

# Enable for final compilation with name "propeller"
_propeller_prefix=${_propeller_prefix-propeller}

# ATTENTION: Do not modify after this line
_is_lto_kernel() {
Expand Down Expand Up @@ -261,6 +273,15 @@ if [ -n "$_autofdo" ] && [ -n "$_autofdo_profile_name" ]; then
fi
fi

# Use generated Propeller Profile
if [ -n "$_propeller" ] && [ -n "$_propeller_prefix" ]; then
if [ -e "$_autofdo_profile_name" ]; then
source+=("$_propeller_prefix")
else
_die "Failed to find file ${_propeller_prefix}"
fi
fi

## List of CachyOS schedulers
case "$_cpusched" in
cachyos|bore|rt-bore|hardened) # CachyOS Scheduler (BORE)
Expand Down Expand Up @@ -486,6 +507,15 @@ prepare() {
BUILD_FLAGS+=(CLANG_AUTOFDO_PROFILE="${srcdir}/${_autofdo_profile_name}")
fi

# Propeller Optimization
if [ -n "$_propeller" ]; then
scripts/config -e PROPELLER_CLANG
fi
if [ -n "$_propeller" ] && [ -n "$_propeller_prefix" ]; then
echo "Propeller profile has been found..."
BUILD_FLAGS+=(CLANG_PROPELLER_PROFILE_PREFIX="${srcdir}/_propeller_prefix")
fi

echo "Enable USER_NS_UNPRIVILEGED"
scripts/config -e USER_NS

Expand Down