[CI] Add benchmark workflow that automatically reports performance regressions #1

	name: Benchmark on self-hosted runners

	on:
	pull_request:
	types:
	- labeled

	jobs:
	run-benchmark:
	if: ${{ github.event.label.name == 'benchmark' }}
	runs-on: [self-hosted, gpu-nvidia]
	strategy:
	matrix:
	clang_version: ['15']
	cuda: ['11.0']
	sycl_bench_program: ['scalar_prod', '2DConvolution']
	steps:
	- uses: actions/checkout@v4
	- name: Build AdaptiveCpp
	run: \|
	mkdir build && cd build
	cmake -DCMAKE_CXX_COMPILER=/usr/bin/clang++-${{matrix.clang_version}} -DCLANG_EXECUTABLE_PATH=/usr/bin/clang++-${{matrix.clang_version}} -DLLVM_DIR=/usr/lib/llvm-${{matrix.clang_version}}/cmake -DWITH_CUDA_BACKEND=ON -DWITH_ROCM_BACKEND=Off -DWITH_OPENCL_BACKEND=Off -DCMAKE_INSTALL_PREFIX=`pwd`/install -DCUDA_TOOLKIT_ROOT_DIR=/opt/cuda-${{matrix.cuda}} ..
	make -j16 install
	cp /.singularity.d/libs/libcuda.* `pwd`/install/lib/
	- name: Build sycl-bench
	run: \|
	git clone https://github.com/bcosenza/sycl-bench.git
	cd sycl-bench
	mkdir build && cd build

	- name: Run benchmark
	run: \|
	cd sycl-bench/build
	python3 ${GITHUB_WORKSPACE}/devops/sycl-bench_to_json.py ./${{matrix.sycl_bench_program}} \| tee ${GITHUB_WORKSPACE}/output.json

	- name: Download previous benchmark data
	uses: actions/cache@v4
	with:
	path: ./cache
	key: ${{ runner.os }}-benchmark

	- name: Store new result
	uses: benchmark-action/github-action-benchmark@v1
	with:
	name: sycl-bench ${{matrix.sycl_bench_program}} benchmark
	tool: customSmallerIsBetter
	output-file-path: output.json
	external-data-json-path: ./cache/benchmark-data.json
	github-token: ${{ secrets.GITHUB_TOKEN }}
	comment-on-alert: true

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