Add support for PYPERF_CPU_AFFINITY

Author: Yhg1s

bench_runner/templates/_benchmark.src.yml

@@ -221,7 +221,7 @@ jobs:
       - name: Tune system
         if: ${{ steps.should_run.outputs.should_run != 'false' }}
         run: |
-          sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH venv/bin/python -m pyperf system ${{ inputs.perf && 'reset' || 'tune' }}
+          sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH venv/bin/python -m pyperf system ${{ inputs.perf && 'reset' || 'tune ${PYPERF_CPU_AFFINITY:+--affinity="$PYPERF_CPU_AFFINITY"}' }}
       - name: Tune for (Linux) perf
         if: ${{ steps.should_run.outputs.should_run != 'false' && inputs.perf }}
         run: |
@@ -232,6 +232,10 @@ jobs:
         run: |
           rm -rf ~/.debug/*
           venv/bin/python -m bench_runner run_benchmarks ${{ inputs.perf && 'perf' || 'benchmark' }} cpython/python ${{ inputs.fork }} ${{ inputs.ref }} ${{ inputs.benchmarks || 'all' }} ${{ env.flags }} --run_id ${{ github.run_id }}
+      - name: Untune system
+        if: ${{ steps.should_run.outputs.should_run != 'false' }}
+        run: |
+          sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH venv/bin/python -m pyperf system reset
       # Pull again, since another job may have committed results in the meantime
       - name: Pull benchmarking
         if: ${{ steps.should_run.outputs.should_run != 'false' && !inputs.perf }}