[style] Extract init-static values in forward path (#30708)

python/sglang/srt/model_executor/runner/eager_runner.py

@@ -216,7 +216,7 @@ class EagerRunner(BaseRunner):
         runs under. PDmux selects a per-stream backend and publishes it via an
         active ForwardContext; non-pdmux uses attn_backend + the ambient ctx."""
         model_runner = self.model_runner
-        if model_runner.server_args.enable_pdmux:
+        if self.enable_pdmux:
             return model_runner.decode_attn_backend, forward_context(
                 ForwardContext(attn_backend=model_runner.decode_attn_backend)
             )
@@ -228,7 +228,7 @@ class EagerRunner(BaseRunner):
         pp_proxy_tensors=None,
     ) -> Union[LogitsProcessorOutput, PPProxyTensors]:
         model_runner = self.model_runner
-        enable_pdmux = model_runner.server_args.enable_pdmux
+        enable_pdmux = self.enable_pdmux
         attn_backend, pdmux_ctx = self._resolve_decode_pdmux()
         if not enable_pdmux:
             forward_batch = self.load_batch(forward_batch, pp_proxy_tensors)
@@ -263,7 +263,7 @@ class EagerRunner(BaseRunner):
         model_runner = self.model_runner
         kwargs = model_runner._extend_forward_kwargs(forward_batch, pp_proxy_tensors)
 
-        if not model_runner.server_args.enable_pdmux:
+        if not self.enable_pdmux:
             forward_batch = self.load_batch(forward_batch, pp_proxy_tensors)
 
         if forward_batch.needs_forward_metadata_init():
@@ -393,7 +393,7 @@ class EagerRunner(BaseRunner):
         # Padded idle (DP-attn MLP sync) needs metadata reinit; unpadded must
         # drop stale forward_metadata to avoid an SWA use-after-free on req_pool.
         if forward_batch.batch_size > 0:
-            if not model_runner.server_args.enable_pdmux:
+            if not self.enable_pdmux:
                 forward_batch = self.load_batch(forward_batch, pp_proxy_tensors)
             model_runner.attn_backend.init_forward_metadata(forward_batch)
         else: