[Benchmark] Show E2EL by default for pooling models (vllm-project#27014)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: xuebwang-amd <xuebwang@amd.com>

Author: DarkLight1337

vllm/benchmarks/serve.py

@@ -58,7 +58,7 @@
 
 class TaskType(Enum):
     GENERATION = "generation"
-    EMBEDDING = "embedding"
+    POOLING = "pooling"
 
 
 @dataclass
@@ -1084,10 +1084,12 @@ def add_cli_args(parser: argparse.ArgumentParser):
     parser.add_argument(
         "--percentile-metrics",
         type=str,
-        default="ttft,tpot,itl",
+        default=None,
         help="Comma-separated list of selected metrics to report percentils. "
         "This argument specifies the metrics to report percentiles. "
-        'Allowed metric names are "ttft", "tpot", "itl", "e2el". ',
+        'Allowed metric names are "ttft", "tpot", "itl", "e2el". '
+        'If not specified, defaults to "ttft,tpot,itl" for generative models '
+        'and "e2el" for pooling models.',
     )
     parser.add_argument(
         "--metric-percentiles",
@@ -1310,7 +1312,11 @@ async def main_async(args: argparse.Namespace) -> dict[str, Any]:
     goodput_config_dict = check_goodput_args(args)
 
     backend = args.backend
-    task_type = TaskType.EMBEDDING if "embeddings" in backend else TaskType.GENERATION
+    task_type = (
+        TaskType.POOLING
+        if "embeddings" in backend or "rerank" in backend
+        else TaskType.GENERATION
+    )
 
     # Collect the sampling parameters.
     if task_type == TaskType.GENERATION:
@@ -1336,12 +1342,17 @@ async def main_async(args: argparse.Namespace) -> dict[str, Any]:
 
         if "temperature" not in sampling_params:
             sampling_params["temperature"] = 0.0  # Default to greedy decoding.
+
+        default_percentile_metrics = "ttft,tpot,itl"
     else:
         sampling_params = {}
+        default_percentile_metrics = "e2el"
 
     extra_body = args.extra_body or {}
     extra_body = {**sampling_params, **extra_body}
 
+    percentile_metrics: str = args.percentile_metrics or default_percentile_metrics
+
     # Avoid GC processing "static" data - reduce pause times.
     gc.collect()
     gc.freeze()
@@ -1360,7 +1371,7 @@ async def main_async(args: argparse.Namespace) -> dict[str, Any]:
         burstiness=args.burstiness,
         disable_tqdm=args.disable_tqdm,
         profile=args.profile,
-        selected_percentile_metrics=args.percentile_metrics.split(","),
+        selected_percentile_metrics=percentile_metrics.split(","),
         selected_percentiles=[float(p) for p in args.metric_percentiles.split(",")],
         ignore_eos=args.ignore_eos,
         goodput_config_dict=goodput_config_dict,