Hoist benchmarking steps into reusable GH action

Signed-off-by: Hanno Becker <[email protected]>

.github/actions/bench/action.yml

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: Apache-2.0
+
+name: Bench MLKEM-C-AArch64
+description: Run benchmarking script
+
+inputs:
+  name:
+    description: Name for the benchmarking run
+    required: true
+  perf:
+    description: Method of obtaining PMU metrics
+    required: true
+    default: 'PERF'
+    type: choice
+    options:
+      - NO
+      - PERF
+      - PMU
+      - M1
+  cflags:
+    description: CFLAGS to pass to compilation
+    required: true
+  archflags:
+    description: ARCHFLAGS to pass to compilation
+    required: true
+  bench_extra_args:
+    description: Further arguments to be appended to command line for `bench` script
+    required: false
+    default: ''
+  store_results:
+    description: Whether to push results to GH pages
+    required: true
+    default: 'false'
+runs:
+  using: composite
+  steps:
+      - name: Run benchmark
+        shell: nix develop .#ci -c bash -e {0}
+        run: |
+          tests bench -c ${{ inputs.perf }} --cflags "${{ inputs.cflags }}" --arch-flags "${{ inputs.archflags }}" -v --output output.json ${{ inputs.bench_extra_args }}
+      - name: Dump benchmark
+        if: ${{ inputs.store_results != 'true' }}
+        run: |
+          cat output.json
+      - name: Store benchmark result
+        if: ${{ inputs.store_results == 'true' }}
+        uses: benchmark-action/github-action-benchmark@v1
+        with:
+          name: ${{ inputs.name }}
+          tool: 'customSmallerIsBetter'
+          output-file-path: output.json
+          github-token: ${{ secrets.AWS_GITHUB_TOKEN }}
+          auto-push: true

.github/workflows/bench_ec2_reusable.yml

@@ -80,23 +80,13 @@ jobs:
               $(cat /proc/cpuinfo)
             EOF
       - name: Run benchmark
-        shell: nix develop .#ci -c bash -e {0}
-        run: |
-          tests bench -c PERF --cflags "${{ inputs.cflags }}" --arch-flags "${{ inputs.archflags }}" -v --output output.json
-      - name: Dump benchmark
-        if: ${{ inputs.store_results != 'true' }}
-        run: |
-          cat output.json
-      - name: Store benchmark result
-        if: ${{ inputs.store_results == 'true' }}
-        uses: benchmark-action/github-action-benchmark@v1
+        uses: ./.github/actions/bench
         with:
           name: ${{ inputs.name }}
-          tool: 'customSmallerIsBetter'
-          output-file-path: output.json
-          github-token: ${{ secrets.AWS_GITHUB_TOKEN }}
-          auto-push: true
-
+          cflags: ${{ inputs.cflags }}
+          archflags: ${{ inputs.archflags }}
+          perf: PERF
+          store_results: ${{ inputs.store_results }}
   stop-ec2-runner:
     name: Stop ${{ github.event.inputs.name }} (${{ github.event.inputs.ec2_instance_type }})
     permissions: