Deprecate --disable-flashinfer and --disable-flashinfer-sampling

python/sglang/srt/server_args.py

@@ -116,8 +116,6 @@ class ServerArgs:
     grammar_backend: Optional[str] = "outlines"
 
     # Optimization/debug options
-    disable_flashinfer: bool = False
-    disable_flashinfer_sampling: bool = False
     disable_radix_cache: bool = False
     disable_jump_forward: bool = False
     disable_cuda_graph: bool = False
@@ -179,20 +177,6 @@ def __post_init__(self):
             self.chunked_prefill_size //= 4  # make it 2048
             self.cuda_graph_max_bs = 4
 
-        # Deprecation warnings
-        if self.disable_flashinfer:
-            logger.warning(
-                "The option '--disable-flashinfer' will be deprecated in the next release. "
-                "Please use '--attention-backend triton' instead."
-            )
-            self.attention_backend = "triton"
-        if self.disable_flashinfer_sampling:
-            logger.warning(
-                "The option '--disable-flashinfer-sampling' will be deprecated in the next release. "
-                "Please use '--sampling-backend pytorch' instead. "
-            )
-            self.sampling_backend = "pytorch"
-
         if not is_flashinfer_available():
             self.attention_backend = "triton"
             self.sampling_backend = "pytorch"
@@ -615,16 +599,6 @@ def add_cli_args(parser: argparse.ArgumentParser):
         )
 
         # Optimization/debug options
-        parser.add_argument(
-            "--disable-flashinfer",
-            action="store_true",
-            help="Disable flashinfer attention kernels. This option will be deprecated in the next release. Please use '--attention-backend triton' instead.",
-        )
-        parser.add_argument(
-            "--disable-flashinfer-sampling",
-            action="store_true",
-            help="Disable flashinfer sampling kernels. This option will be deprecated in the next release. Please use '--sampling-backend pytorch' instead.",
-        )
         parser.add_argument(
             "--disable-radix-cache",
             action="store_true",
@@ -733,6 +707,18 @@ def add_cli_args(parser: argparse.ArgumentParser):
             help="Delete the model checkpoint after loading the model.",
         )
 
+        # Deprecated arguments
+        parser.add_argument(
+            "--disable-flashinfer",
+            action=DeprecatedAction,
+            help="'--disable-flashinfer' is deprecated. Please use '--attention-backend triton' instead.",
+        )
+        parser.add_argument(
+            "--disable-flashinfer-sampling",
+            action=DeprecatedAction,
+            help="'--disable-flashinfer-sampling' is deprecated. Please use '--sampling-backend pytroch' instead.",
+        )
+
     @classmethod
     def from_cli_args(cls, args: argparse.Namespace):
         args.tp_size = args.tensor_parallel_size
@@ -826,3 +812,13 @@ def __call__(self, parser, namespace, values, option_string=None):
                 getattr(namespace, self.dest)[name] = path
             else:
                 getattr(namespace, self.dest)[lora_path] = lora_path
+
+
+class DeprecatedAction(argparse.Action):
+    def __init__(self, option_strings, dest, nargs=0, **kwargs):
+        super(DeprecatedAction, self).__init__(
+            option_strings, dest, nargs=nargs, **kwargs
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        raise ValueError(self.help)

python/sglang/srt/utils.py

@@ -71,6 +71,8 @@ def is_flashinfer_available():
     Check whether flashinfer is available.
     As of Oct. 6, 2024, it is only available on NVIDIA GPUs.
     """
+    if os.environ.get("SGLANG_IS_FLASHINFER_AVAILABLE", "true") == "false":
+        return False
     return torch.cuda.is_available() and not is_hip()