[CI][Bugfix] Fix the error in generating the performance data table and add a fallback mechanism that prevents the result file from being generated when test case execution fails. (#2839)

Signed-off-by: wangyu <410167048@qq.com>
Signed-off-by: wangyu <53896905+yenuo26@users.noreply.github.com>

tests/dfx/perf/scripts/run_diffusion_benchmark.py

@@ -52,6 +52,7 @@ BENCHMARK_SCRIPT = str(
 _SESSION_TIMESTAMP = datetime.now().strftime("%Y%m%d-%H%M%S")
 _RESULT_LOCK = threading.Lock()
 _BRANCHPOINT_COMMIT_SHA: str | None = None
+DIFFUSION_RESULT_TEMPLATE_PATH = Path(__file__).parent / "diffusion_result_template.json"
 
 
 def _get_config_file_from_argv() -> str | None:
@@ -563,10 +564,17 @@ def run_benchmark(
 
     if process.returncode != 0:
         tmp_result_file.unlink(missing_ok=True)
-        raise RuntimeError(f"Benchmark script exited with code {process.returncode}")
+        print(f"ERROR:Benchmark script exited with code {process.returncode}")
 
     if not tmp_result_file.exists():
-        raise FileNotFoundError(f"Benchmark result file not found: {tmp_result_file}")
+        with open(DIFFUSION_RESULT_TEMPLATE_PATH, encoding="utf-8") as f:
+            template_payload = json.load(f)
+        # Template schema is fixed and owned by this repo:
+        # ``diffusion_result_template.json`` is a one-item list and metrics live at [0]["result"].
+        template_metrics: dict[str, Any] = template_payload[0]["result"]
+        with open(tmp_result_file, "w", encoding="utf-8") as f:
+            json.dump(template_metrics, f, ensure_ascii=False, indent=2)
+        print(f"Benchmark result file not generated, fallback to template: {tmp_result_file}")
 
     try:
         with open(tmp_result_file, encoding="utf-8") as f: