Implement AOT static PGO #2243
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Implement AOT static PGO #2243
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Merge branch main into dev/static_pgo
- Add benchmark dhrystone - Add test pgo scripts for benchmarks - Fix benchmark script issues
Explicitly disable static counter allocation for value profiler since it will be allocated by runtime.
x86-32 target was tested with benchmark coremark, dhrystone, sightglass and polybench.
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LGTM |
victoryang00
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May 27, 2024
LLVM PGO (Profile-Guided Optimization) allows the compiler to better optimize code
for how it actually runs. This PR implements the AOT static PGO, and is tested on
Linux x86-64 and x86-32. The basic steps are:
1. Use `wamrc --enable-llvm-pgo -o <aot_file_of_pgo> <wasm_file>`
to generate an instrumented aot file.
2. Compile iwasm with `cmake -DWAMR_BUILD_STATIC_PGO=1` and run
`iwasm --gen-prof-file=<raw_profile_file> <aot_file_of_pgo>`
to generate the raw profile file.
3. Run `llvm-profdata merge -output=<profile_file> <raw_profile_file>`
to merge the raw profile file into the profile file.
4. Run `wamrc --use-prof-file=<profile_file> -o <aot_file> <wasm_file>`
to generate the optimized aot file.
5. Run the optimized aot_file: `iwasm <aot_file>`.
The test scripts are also added for each benchmark, run `test_pgo.sh` under
each benchmark's folder to test the AOT static pgo.
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LLVM PGO (Profile-Guided Optimization) allows the compiler to better optimize code
for how it actually runs. This PR implements the AOT static PGO, and is tested on
Linux x86-64 and x86-32. The basic steps are:
wamrc --enable-llvm-pgo -o <aot_file_of_pgo> <wasm_file>to generate an instrumented aot file.
cmake -DWAMR_BUILD_STATIC_PGO=1and runiwasm --gen-prof-file=<raw_profile_file> <aot_file_of_pgo>to generate the raw profile file
llvm-profdata merge -output=<profile_file> <raw_profile_file>to merge the raw profile file into the profile file
wamrc --use-prof-file=<profile_file> -o <aot_file> <wasm_file>to generate the optimized aot file
iwasm <aot_file>The test scripts are also added for each benchmark, run
test_pgo.shundereach benchmark's folder to test the AOT static pgo.