[CI] Remove metrics artifact mechanism from nightly NPU workflows (#35489)

.github/workflows/_npu-single-node-test-stage.yml

@@ -411,6 +411,7 @@ jobs:
           export test_status tc_name
           echo "## ${tc_name}  ${status_icon} ${test_status}" >> $GITHUB_STEP_SUMMARY
           echo "" >> $GITHUB_STEP_SUMMARY
+          if [ "${{ inputs.is_nightly_pipeline_job }}" != "true" ]; then
             metric_count=$(grep -c '\[METRIC\]' /tmp/test_output.log 2>/dev/null || echo 0)
             if [ "${metric_count}" -gt 0 ]; then
               echo "| Metric | Value | Pass |" >> $GITHUB_STEP_SUMMARY
@@ -424,5 +425,5 @@ jobs:
               echo "No metrics collected (test may have failed before producing results)." >> $GITHUB_STEP_SUMMARY
             fi
             echo "" >> $GITHUB_STEP_SUMMARY
-
+          fi
           exit ${test_exit_code}

.github/workflows/nightly-test-npu-e2e-multi-node.yml

@@ -225,14 +225,6 @@ jobs:
           echo "Run command: ${CMD}"
           eval "${CMD}"
 
-      - name: Upload metrics
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: metrics-${{ inputs.test_config_name }}
-          path: /tmp/metrics.json
-          retention-days: 7
-
       - name: Post process
         if: always()
         run: |

.github/workflows/nightly-test-npu.yml

@@ -453,13 +453,6 @@ jobs:
       - nightly-poc-multi-node-mix-tests
     runs-on: ubuntu-latest
     steps:
-      - name: Download all metrics
-        uses: actions/download-artifact@v4
-        with:
-          pattern: metrics-*
-          path: /tmp/metrics
-          merge-multiple: false
-
       - name: Generate results table
         run: |
           single_result_a2="${{ needs.nightly-1-npu-a2.result }}"
@@ -522,42 +515,6 @@ jobs:
           echo "| multi-node-mix-poc | $(group_icon ${mix_result}) ${mix_result} |" >> $GITHUB_STEP_SUMMARY
           echo "" >> $GITHUB_STEP_SUMMARY
 
-          echo "## Per-Test Metrics" >> $GITHUB_STEP_SUMMARY
-          echo "" >> $GITHUB_STEP_SUMMARY
-
-          has_metrics=false
-          # Each suite job uploads its METRICS_DATA_FILE directory, which
-          # contains per-case subdirectories with their own metrics.json.
-          # Recursively find every metrics.json and render one table row per
-          # test case.
-          for file in $(find /tmp/metrics -name metrics.json 2>/dev/null); do
-            if [ -f "$file" ]; then
-              has_metrics=true
-              echo "import json" > /tmp/parse_metrics.py
-              echo "with open('$file') as f:" >> /tmp/parse_metrics.py
-              echo "    d = json.load(f)" >> /tmp/parse_metrics.py
-              echo "tc = d.get('test_case', '-')" >> /tmp/parse_metrics.py
-              echo "tp = d.get('test_type', '-')" >> /tmp/parse_metrics.py
-              echo "st = d.get('status', 'unknown')" >> /tmp/parse_metrics.py
-              echo "icon = '✅' if st == 'pass' else '❌'" >> /tmp/parse_metrics.py
-              echo "metrics = d.get('metrics', {})" >> /tmp/parse_metrics.py
-              echo "baselines = d.get('baselines', {})" >> /tmp/parse_metrics.py
-              echo "mstr = ', '.join(f'{k}={v}' for k,v in metrics.items()) if metrics else '-'" >> /tmp/parse_metrics.py
-              echo "bstr = ', '.join(f'{k}={v}' for k,v in baselines.items()) if baselines else '-'" >> /tmp/parse_metrics.py
-              echo "print(f'| {tc} | {tp} | {icon} {st} | {mstr} | {bstr} |')" >> /tmp/parse_metrics.py
-              python3 /tmp/parse_metrics.py
-            fi
-          done > /tmp/metrics_table.txt
-
-          if [ "${has_metrics}" = "true" ]; then
-            echo "| Test Case | Type | Status | Metrics | Baseline |" >> $GITHUB_STEP_SUMMARY
-            echo "|-----------|------|--------|---------|----------|" >> $GITHUB_STEP_SUMMARY
-            cat /tmp/metrics_table.txt >> $GITHUB_STEP_SUMMARY
-          else
-            echo "No per-test metrics available (artifacts not found)." >> $GITHUB_STEP_SUMMARY
-          fi
-          echo "" >> $GITHUB_STEP_SUMMARY
-
           FAIL=0
           for r in "${single_result_a2}" "${single_result}" "${multi_result}" "${mix_result}"; do
             if [ "${r}" != "success" ] && [ "${r}" != "skipped" ]; then FAIL=1; fi

python/sglang/test/ascend/e2e/run_npu_e2e_test.py

@@ -501,6 +501,13 @@ def monitor_pod_logs(
 
 
 def generate_metrics_json(metrics_data_file, test_case, status):
+    """Collect [METRIC] lines from the log and write metrics.json.
+
+    This writes ${metrics_data_file}/metrics.json only, which feeds the
+    persistence-directory output (e.g. /root/.cache/tests/output/...).
+    It is NOT consumed by CI artifacts (the former /tmp/metrics.json +
+    'Upload metrics' path was removed).
+    """
     log_file = os.path.join(metrics_data_file, "test_output.log")
 
     metrics = {}
@@ -553,10 +560,6 @@ def generate_metrics_json(metrics_data_file, test_case, status):
         json.dump(output, f, indent=2)
     logger.info(f"Metrics JSON written to {output_path}")
 
-    with open("/tmp/metrics.json", "w") as f:
-        json.dump(output, f, indent=2)
-    logger.info("Metrics JSON written to /tmp/metrics.json")
-
 
 def run_npu_e2e_test_case(
     docker_image_url: str,