make linux PGO script more generic
This extracts the linux-isms into variables, so that the script can be extended to do PGO on windows. These variables will be overriden in a few spots, in windows-specific blocks.
This commit is contained in:
Rémy Rakic
parent
9dd6f5246c
commit
736dbefaf3
@ -3,44 +3,69 @@
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set -euxo pipefail
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ci_dir=`cd $(dirname $0) && pwd`
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source "$ci_dir/shared.sh"
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# The root checkout, where the source is located
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CHECKOUT=/checkout
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DOWNLOADED_LLVM=/rustroot
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# The main directory where the build occurs, which can be different between linux and windows
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BUILD_ROOT=$CHECKOUT/obj
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# The various build artifacts used in other commands: to launch rustc builds, build the perf
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# collector, and run benchmarks to gather profiling data
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BUILD_ARTIFACTS=$BUILD_ROOT/build/$PGO_HOST
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RUSTC_STAGE_0=$BUILD_ARTIFACTS/stage0/bin/rustc
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CARGO_STAGE_0=$BUILD_ARTIFACTS/stage0/bin/cargo
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RUSTC_STAGE_2=$BUILD_ARTIFACTS/stage2/bin/rustc
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# Make sure we have a temporary PGO work folder
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PGO_TMP=/tmp/tmp-pgo
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mkdir -p $PGO_TMP
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rm -rf $PGO_TMP/*
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RUSTC_PERF=$PGO_TMP/rustc-perf
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# Compile several crates to gather execution PGO profiles.
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# Arg0 => profiles (Debug, Opt)
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# Arg1 => scenarios (Full, IncrFull, All)
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# Arg2 => crates (syn, cargo, ...)
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gather_profiles () {
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cd /checkout/obj
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cd $BUILD_ROOT
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# Compile libcore, both in opt-level=0 and opt-level=3
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RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc \
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--edition=2021 --crate-type=lib ../library/core/src/lib.rs
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RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc \
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--edition=2021 --crate-type=lib -Copt-level=3 ../library/core/src/lib.rs
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RUSTC_BOOTSTRAP=1 $RUSTC_STAGE_2 \
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--edition=2021 --crate-type=lib $CHECKOUT/library/core/src/lib.rs \
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--out-dir $PGO_TMP
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RUSTC_BOOTSTRAP=1 $RUSTC_STAGE_2 \
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--edition=2021 --crate-type=lib -Copt-level=3 $CHECKOUT/library/core/src/lib.rs \
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--out-dir $PGO_TMP
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cd rustc-perf
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cd $RUSTC_PERF
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# Run rustc-perf benchmarks
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# Benchmark using profile_local with eprintln, which essentially just means
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# don't actually benchmark -- just make sure we run rustc a bunch of times.
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RUST_LOG=collector=debug \
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RUSTC=/checkout/obj/build/$PGO_HOST/stage0/bin/rustc \
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RUSTC=$RUSTC_STAGE_0 \
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RUSTC_BOOTSTRAP=1 \
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/checkout/obj/build/$PGO_HOST/stage0/bin/cargo run -p collector --bin collector -- \
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$CARGO_STAGE_0 run -p collector --bin collector -- \
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profile_local \
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eprintln \
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/checkout/obj/build/$PGO_HOST/stage2/bin/rustc \
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$RUSTC_STAGE_2 \
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--id Test \
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--profiles $1 \
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--cargo /checkout/obj/build/$PGO_HOST/stage0/bin/cargo \
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--cargo $CARGO_STAGE_0 \
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--scenarios $2 \
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--include $3
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cd /checkout/obj
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cd $BUILD_ROOT
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}
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rm -rf /tmp/rustc-pgo
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# This path has to be absolute
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LLVM_PROFILE_DIRECTORY_ROOT=/tmp/llvm-pgo
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LLVM_PROFILE_DIRECTORY_ROOT=$PGO_TMP/llvm-pgo
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# We collect LLVM profiling information and rustc profiling information in
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# separate phases. This increases build time -- though not by a huge amount --
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@ -49,34 +74,34 @@ LLVM_PROFILE_DIRECTORY_ROOT=/tmp/llvm-pgo
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# LLVM IR PGO does not respect LLVM_PROFILE_FILE, so we have to set the profiling file
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# path through our custom environment variable. We include the PID in the directory path
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# to avoid updates to profile files being lost because of race conditions.
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LLVM_PROFILE_DIR=${LLVM_PROFILE_DIRECTORY_ROOT}/prof-%p python3 ../x.py build \
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LLVM_PROFILE_DIR=${LLVM_PROFILE_DIRECTORY_ROOT}/prof-%p python3 $CHECKOUT/x.py build \
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--target=$PGO_HOST \
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--host=$PGO_HOST \
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--stage 2 library/std \
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--llvm-profile-generate
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# Compile rustc perf
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cp -r /tmp/rustc-perf ./
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chown -R $(whoami): ./rustc-perf
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cd rustc-perf
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cp -r /tmp/rustc-perf $RUSTC_PERF
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chown -R $(whoami): $RUSTC_PERF
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cd $RUSTC_PERF
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# Build the collector ahead of time, which is needed to make sure the rustc-fake
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# Build rustc-perf's collector ahead of time, which is needed to make sure the rustc-fake
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# binary used by the collector is present.
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RUSTC=/checkout/obj/build/$PGO_HOST/stage0/bin/rustc \
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RUSTC=$RUSTC_STAGE_0 \
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RUSTC_BOOTSTRAP=1 \
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/checkout/obj/build/$PGO_HOST/stage0/bin/cargo build -p collector
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$CARGO_STAGE_0 build -p collector
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# Here we're profiling LLVM, so we only care about `Debug` and `Opt`, because we want to stress
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# codegen. We also profile some of the most prolific crates.
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gather_profiles "Debug,Opt" "Full" \
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"syn-1.0.89,cargo-0.60.0,serde-1.0.136,ripgrep-13.0.0,regex-1.5.5,clap-3.1.6,hyper-0.14.18"
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"syn-1.0.89,cargo-0.60.0,serde-1.0.136,ripgrep-13.0.0,regex-1.5.5,clap-3.1.6,hyper-0.14.18"
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LLVM_PROFILE_MERGED_FILE=/tmp/llvm-pgo.profdata
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LLVM_PROFILE_MERGED_FILE=$PGO_TMP/llvm-pgo.profdata
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# Merge the profile data we gathered for LLVM
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# Note that this uses the profdata from the clang we used to build LLVM,
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# which likely has a different version than our in-tree clang.
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/rustroot/bin/llvm-profdata merge -o ${LLVM_PROFILE_MERGED_FILE} ${LLVM_PROFILE_DIRECTORY_ROOT}
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$DOWNLOADED_LLVM/bin/llvm-profdata merge -o ${LLVM_PROFILE_MERGED_FILE} ${LLVM_PROFILE_DIRECTORY_ROOT}
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echo "LLVM PGO statistics"
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du -sh ${LLVM_PROFILE_MERGED_FILE}
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@ -84,17 +109,20 @@ du -sh ${LLVM_PROFILE_DIRECTORY_ROOT}
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echo "Profile file count"
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find ${LLVM_PROFILE_DIRECTORY_ROOT} -type f | wc -l
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# We don't need the individual .profraw files now that they have been merged into a final .profdata
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rm -r $LLVM_PROFILE_DIRECTORY_ROOT
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# Rustbuild currently doesn't support rebuilding LLVM when PGO options
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# change (or any other llvm-related options); so just clear out the relevant
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# directories ourselves.
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rm -r ./build/$PGO_HOST/llvm ./build/$PGO_HOST/lld
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rm -r $BUILD_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld
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# Okay, LLVM profiling is done, switch to rustc PGO.
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# The path has to be absolute
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RUSTC_PROFILE_DIRECTORY_ROOT=/tmp/rustc-pgo
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RUSTC_PROFILE_DIRECTORY_ROOT=$PGO_TMP/rustc-pgo
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python3 ../x.py build --target=$PGO_HOST --host=$PGO_HOST \
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python3 $CHECKOUT/x.py build --target=$PGO_HOST --host=$PGO_HOST \
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--stage 2 library/std \
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--rust-profile-generate=${RUSTC_PROFILE_DIRECTORY_ROOT}
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@ -108,10 +136,10 @@ LLVM_PROFILE_FILE=${RUSTC_PROFILE_DIRECTORY_ROOT}/default_%m_%p.profraw gather_p
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"Check,Debug,Opt" "All" \
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"externs,ctfe-stress-5,cargo-0.60.0,token-stream-stress,match-stress,tuple-stress,diesel-1.4.8,bitmaps-3.1.0"
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RUSTC_PROFILE_MERGED_FILE=/tmp/rustc-pgo.profdata
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RUSTC_PROFILE_MERGED_FILE=$PGO_TMP/rustc-pgo.profdata
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# Merge the profile data we gathered
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./build/$PGO_HOST/llvm/bin/llvm-profdata \
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$BUILD_ARTIFACTS/llvm/bin/llvm-profdata \
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merge -o ${RUSTC_PROFILE_MERGED_FILE} ${RUSTC_PROFILE_DIRECTORY_ROOT}
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echo "Rustc PGO statistics"
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@ -120,10 +148,13 @@ du -sh ${RUSTC_PROFILE_DIRECTORY_ROOT}
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echo "Profile file count"
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find ${RUSTC_PROFILE_DIRECTORY_ROOT} -type f | wc -l
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# We don't need the individual .profraw files now that they have been merged into a final .profdata
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rm -r $RUSTC_PROFILE_DIRECTORY_ROOT
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# Rustbuild currently doesn't support rebuilding LLVM when PGO options
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# change (or any other llvm-related options); so just clear out the relevant
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# directories ourselves.
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rm -r ./build/$PGO_HOST/llvm ./build/$PGO_HOST/lld
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rm -r $BUILD_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld
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# This produces the actual final set of artifacts, using both the LLVM and rustc
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# collected profiling data.
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