[CI] Append test variant name to markdown report header in nightly test (#16166)

python/sglang/test/nightly_bench_utils.py

@@ -87,7 +87,9 @@ Note: To view the traces through perfetto-ui, please:
         return f"| {self.batch_size} | {self.input_len} | {self.latency:.2f} | {self.input_throughput:.2f} | {self.output_throughput:.2f} | {accept_length} | {itl:.2f} | {input_cost:.2f} | {output_cost:.2f} | {profile_link} |\n"
 
 
-def generate_markdown_report(trace_dir, results: List[BenchmarkResult]) -> str:
+def generate_markdown_report(
+    trace_dir, results: List[BenchmarkResult], variant: Optional[str] = None
+) -> str:
     """Generate a markdown report from a list of BenchmarkResult object from a single run."""
     # Build model header with run_name if it's not "default"
     model_header = results[0].model_path
@@ -99,6 +101,9 @@ def generate_markdown_report(trace_dir, results: List[BenchmarkResult]) -> str:
     if gpu_config:
         model_header += f" [{gpu_config}]"
 
+    if variant:
+        model_header += f" ({variant})"
+
     summary = f"### {model_header}\n"
 
     summary += "| batch size | input len | latency (s) | input throughput (tok/s)  | output throughput (tok/s) | acc length | ITL (ms) | input cost ($/1M) | output cost ($/1M) | profile (extend) | profile (decode)|\n"