[NVIDIA] Support TF32 matmul to improve MiniMax gate gemm performance (#22744)

docs_new/docs/advanced_features/server_arguments.mdx

@@ -394,6 +394,12 @@ Please consult the documentation below and [server_args.py](https://github.com/s
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>`False`</td>
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>bool flag (set to enable)</td>
     </tr>
+    <tr>
+      <td style={{padding: "9px 12px", fontWeight: 500, backgroundColor: "rgba(255,255,255,0.02)"}}>`--enable-tf32-matmul`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>Enable float32 matmuls to use TensorFloat32 precision for better performance (via torch.set_float32_matmul_precision). CUDA only. Automatically enabled for MiniMax-M2 and GLM-4 models.</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>`False`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>bool flag (set to enable)</td>
+    </tr>
   </tbody>
 </table>
 

python/sglang/srt/model_executor/model_runner.py

@@ -533,6 +533,10 @@ class ModelRunner(ModelRunnerKVCacheMixin):
         if self.device == "cpu":
             self.init_threads_binding()
 
+        # Set float32 matmul precision
+        if server_args.enable_tf32_matmul:
+            torch.set_float32_matmul_precision("high")
+
         # Get available memory before model loading.
         # Stored for later use by alloc_memory_pool().
         self.pre_model_load_memory = self.init_torch_distributed()

python/sglang/srt/server_args.py

@@ -649,6 +649,10 @@ class ServerArgs:
         Optional[str],
         "Path to the FlashRL quantization profile. Required when using --load-format flash_rl.",
     ] = None  # For flash_rl load format
+    enable_tf32_matmul: A[
+        bool,
+        "Enable float32 matmuls to use TensorFloat32 precision for better performance (via torch.set_float32_matmul_precision). CUDA only.",
+    ] = False
 
     # -------------------------------------------------------------------------
     # Memory and scheduling
@@ -4259,6 +4263,10 @@ class ServerArgs:
                     logger.info(
                         "Use flashinfer_trtllm as MoE runner backend on sm100 for Glm4MoeForCausalLM"
                     )
+            self.enable_tf32_matmul = True
+            logger.info(
+                "Enable TF32 matmul for Glm4MoeForCausalLM model to improve gate gemm performance."
+            )
 
         elif model_arch in [
             "FalconH1ForCausalLM",
@@ -4292,6 +4300,12 @@ class ServerArgs:
         elif model_arch in ["ZayaForCausalLM"]:
             self._handle_mamba_radix_cache(model_arch=model_arch)
 
+        elif model_arch in ["MiniMaxM2ForCausalLM"]:
+            self.enable_tf32_matmul = True
+            logger.info(
+                "Enable TF32 matmul for MiniMaxM2ForCausalLM model to improve gate gemm performance."
+            )
+
         if (
             model_arch in ["Qwen3VLForConditionalGeneration"]
             and is_hip()