[FEAT] Add transformers backend support (#5929)

python/sglang/test/runners.py

@@ -455,6 +455,7 @@ class SRTRunner:
         torch_dtype: torch.dtype,
         model_type: str,
         tp_size: int = 1,
+        impl: str = "auto",
         port: int = DEFAULT_PORT_FOR_SRT_TEST_RUNNER,
         lora_paths: List[str] = None,
         max_loras_per_batch: int = 4,
@@ -475,6 +476,7 @@ class SRTRunner:
         speculative_num_draft_tokens: Optional[int] = None,
         disable_overlap_schedule: bool = False,
         disable_custom_all_reduce: bool = False,
+        torchao_config: Optional[str] = None,
     ):
         self.model_type = model_type
         self.is_generation = model_type == "generation"
@@ -493,6 +495,8 @@ class SRTRunner:
             tp_size=tp_size,
             dtype=get_dtype_str(torch_dtype),
             port=port,
+            impl=impl,
+            torchao_config=torchao_config,
             mem_fraction_static=mem_fraction_static,
             trust_remote_code=trust_remote_code,
             is_embedding=not self.is_generation,