Rollup merge of #108647 - nikic:pgo-sh, r=jyn514
Remove dead pgo.sh file This has been replaced by stage-build.py.
This commit is contained in:
Matthias Krüger
GitHub
commit
dadfbb6a4b
230
src/ci/pgo.sh
230
src/ci/pgo.sh
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#!/bin/bash
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# ignore-tidy-linelength
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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=$CHECKOUT/obj
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if isWindows; then
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CHECKOUT=$(pwd)
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DOWNLOADED_LLVM=$CHECKOUT/citools/clang-rust
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BUILD_ROOT=$CHECKOUT
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fi
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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=$BUILD_ARTIFACTS/stage2/bin/rustc
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# Windows needs these to have the .exe extension
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if isWindows; then
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RUSTC_STAGE_0="${RUSTC_STAGE_0}.exe"
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CARGO_STAGE_0="${CARGO_STAGE_0}.exe"
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RUSTC_STAGE_2="${RUSTC_STAGE_2}.exe"
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fi
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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 $BUILD_ROOT
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# Compile libcore, both in opt-level=0 and opt-level=3
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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 $RUSTC_PERF
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# Run rustc-perf benchmarks
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# Benchmark using profile_local with eprintln, which essentially just means
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# don't actually benchmark -- just make sure we run rustc a bunch of times.
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RUST_LOG=collector=debug \
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RUSTC=$RUSTC_STAGE_0 \
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RUSTC_BOOTSTRAP=1 \
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$CARGO_STAGE_0 run -p collector --bin collector -- \
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profile_local \
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eprintln \
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$RUSTC_STAGE_2 \
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--id Test \
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--profiles $1 \
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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 $BUILD_ROOT
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}
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# This path has to be absolute
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LLVM_PROFILE_DIRECTORY_ROOT=$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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# but prevents any problems from arising due to different profiling runtimes
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# being simultaneously linked in.
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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 $CHECKOUT/x.py build \
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--target=$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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# - get the expected commit source code: on linux, the Dockerfile downloads a source archive before
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# running this script. On Windows, we do that here.
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if isLinux; then
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cp -r /tmp/rustc-perf $RUSTC_PERF
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chown -R $(whoami): $RUSTC_PERF
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else
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# rustc-perf version from 2022-07-22
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PERF_COMMIT=3c253134664fdcba862c539d37f0de18557a9a4c
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retry curl -LS -o $PGO_TMP/perf.zip \
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https://github.com/rust-lang/rustc-perf/archive/$PERF_COMMIT.zip && \
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cd $PGO_TMP && unzip -q perf.zip && \
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mv rustc-perf-$PERF_COMMIT $RUSTC_PERF && \
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rm perf.zip
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fi
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# - build rustc-perf's collector ahead of time, which is needed to make sure the rustc-fake binary
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# used by the collector is present.
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cd $RUSTC_PERF
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RUSTC=$RUSTC_STAGE_0 \
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RUSTC_BOOTSTRAP=1 \
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$CARGO_STAGE_0 build -p collector
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# Here we're profiling LLVM, so we only care about `Debug` and `Opt`, because we want to stress
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# codegen. We also profile some of the most prolific crates.
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gather_profiles "Debug,Opt" "Full" \
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"syn-1.0.89,cargo-0.60.0,serde-1.0.136,ripgrep-13.0.0,regex-1.5.5,clap-3.1.6,hyper-0.14.18"
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LLVM_PROFILE_MERGED_FILE=$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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$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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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_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld
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# Okay, LLVM profiling is done, switch to rustc PGO.
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# The path has to be absolute
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RUSTC_PROFILE_DIRECTORY_ROOT=$PGO_TMP/rustc-pgo
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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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# Here we're profiling the `rustc` frontend, so we also include `Check`.
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# The benchmark set includes various stress tests that put the frontend under pressure.
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if isLinux; then
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# The profile data is written into a single filepath that is being repeatedly merged when each
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# rustc invocation ends. Empirically, this can result in some profiling data being lost. That's
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# why we override the profile path to include the PID. This will produce many more profiling
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# files, but the resulting profile will produce a slightly faster rustc binary.
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LLVM_PROFILE_FILE=${RUSTC_PROFILE_DIRECTORY_ROOT}/default_%m_%p.profraw gather_profiles \
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"Check,Debug,Opt" "All" \
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"externs,ctfe-stress-5,cargo-0.60.0,token-stream-stress,match-stress,tuple-stress,diesel-1.4.8,bitmaps-3.1.0"
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else
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# On windows, we don't do that yet (because it generates a lot of data, hitting disk space
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# limits on the builder), and use the default profraw merging behavior.
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gather_profiles \
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"Check,Debug,Opt" "All" \
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"externs,ctfe-stress-5,cargo-0.60.0,token-stream-stress,match-stress,tuple-stress,diesel-1.4.8,bitmaps-3.1.0"
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fi
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RUSTC_PROFILE_MERGED_FILE=$PGO_TMP/rustc-pgo.profdata
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# Merge the profile data we gathered
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$BUILD_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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du -sh ${RUSTC_PROFILE_MERGED_FILE}
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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_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld
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if isLinux; then
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# Gather BOLT profile (BOLT is currently only available on Linux)
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python3 ../x.py build --target=$PGO_HOST --host=$PGO_HOST \
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--stage 2 library/std \
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--llvm-profile-use=${LLVM_PROFILE_MERGED_FILE} \
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--llvm-bolt-profile-generate
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BOLT_PROFILE_MERGED_FILE=/tmp/bolt.profdata
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# Here we're profiling Bolt.
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gather_profiles "Check,Debug,Opt" "Full" \
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"syn-1.0.89,serde-1.0.136,ripgrep-13.0.0,regex-1.5.5,clap-3.1.6,hyper-0.14.18"
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merge-fdata /tmp/prof.fdata* > ${BOLT_PROFILE_MERGED_FILE}
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echo "BOLT statistics"
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du -sh /tmp/prof.fdata*
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du -sh ${BOLT_PROFILE_MERGED_FILE}
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echo "Profile file count"
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find /tmp/prof.fdata* -type f | wc -l
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rm -r $BUILD_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld
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# This produces the actual final set of artifacts, using both the LLVM and rustc
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# collected profiling data.
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$@ \
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--rust-profile-use=${RUSTC_PROFILE_MERGED_FILE} \
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--llvm-profile-use=${LLVM_PROFILE_MERGED_FILE} \
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--llvm-bolt-profile-use=${BOLT_PROFILE_MERGED_FILE}
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else
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$@ \
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--rust-profile-use=${RUSTC_PROFILE_MERGED_FILE} \
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--llvm-profile-use=${LLVM_PROFILE_MERGED_FILE}
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fi
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echo "Rustc binary size"
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ls -la ./build/$PGO_HOST/stage2/bin
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ls -la ./build/$PGO_HOST/stage2/lib
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