fix EAGLE 2 non greedy case (#3407)

Co-authored-by: Ying Sheng <sqy1415@gmail.com>

python/sglang/srt/model_executor/cuda_graph_runner.py

@@ -462,8 +462,11 @@ class CudaGraphRunner:
                     ),
                     positions=None,
                     retrive_index=None,
+                    retrive_next_token=None,
+                    retrive_next_sibling=None,
                     retrive_cum_len=None,
                     draft_token_num=self.model_runner.server_args.speculative_num_draft_tokens,
+                    spec_steps=self.model_runner.server_args.speculative_num_steps,
                     capture_hidden_mode=CaptureHiddenMode.FULL,
                 )
 

python/sglang/srt/speculative/eagle_utils.py

@@ -4,6 +4,7 @@ import dataclasses
 from typing import TYPE_CHECKING, List
 
 import torch
+import torch.nn.functional as F
 import triton
 import triton.language as tl
 
@@ -11,7 +12,14 @@ from sglang.srt.layers.attention.flashinfer_backend import (
     create_flashinfer_kv_indices_triton,
 )
 from sglang.srt.model_executor.forward_batch_info import CaptureHiddenMode
-from sglang.srt.speculative.build_eagle_tree import build_tree_kernel
+from sglang.srt.speculative.build_eagle_tree import (
+    build_tree_kernel,
+    build_tree_kernel_efficient,
+)
+from sglang.srt.utils import is_cuda_available
+
+if is_cuda_available():
+    from sgl_kernel import tree_speculative_sampling_target_only
 
 if TYPE_CHECKING:
     from sglang.srt.managers.schedule_batch import ScheduleBatch
@@ -160,8 +168,11 @@ class EagleVerifyInput:
     custom_mask: torch.Tensor
     positions: torch.Tensor
     retrive_index: torch.Tensor
+    retrive_next_token: torch.Tensor
+    retrive_next_sibling: torch.Tensor
     retrive_cum_len: torch.Tensor
     draft_token_num: int
+    spec_steps: int
     capture_hidden_mode: CaptureHiddenMode
 
     @classmethod
@@ -175,10 +186,45 @@ class EagleVerifyInput:
         seq_lens_sum: int,
         topk: int,
         spec_steps: int,
-        num_verify_token: int,
+        num_verify_tokens: int,
+        is_all_greedy: bool,
     ):
-        tree_mask, position, retrive_index, retrive_cum_len, draft_tokens = (
-            build_tree_kernel(
+        if is_all_greedy:
+            tree_mask, position, retrive_index, retrive_cum_len, draft_tokens = (
+                build_tree_kernel(
+                    verified_id,
+                    score_list,  # b, n, topk; n= 1 + (num_steps-1) * self.topk
+                    token_list,
+                    parents_list,
+                    seq_lens,
+                    seq_lens_sum,
+                    topk,
+                    spec_steps,
+                    num_verify_tokens,
+                )
+            )
+
+            return cls(
+                draft_tokens,
+                tree_mask,
+                position,
+                retrive_index,
+                None,
+                None,
+                retrive_cum_len,
+                num_verify_tokens,
+                spec_steps,
+                CaptureHiddenMode.FULL,
+            )
+        else:
+            (
+                tree_mask,
+                position,
+                retrive_index,
+                retrive_next_token,
+                retrive_next_sibling,
+                draft_tokens,
+            ) = build_tree_kernel_efficient(
                 verified_id,
                 score_list,
                 token_list,
@@ -187,18 +233,21 @@ class EagleVerifyInput:
                 seq_lens_sum,
                 topk,
                 spec_steps,
-                num_verify_token,
+                num_verify_tokens,
+            )
+
+            return cls(
+                draft_tokens,
+                tree_mask,
+                position,
+                retrive_index,
+                retrive_next_token,
+                retrive_next_sibling,
+                None,
+                num_verify_tokens,
+                spec_steps,
+                CaptureHiddenMode.FULL,
             )
-        )
-        return cls(
-            draft_tokens,
-            tree_mask,
-            position,
-            retrive_index,
-            retrive_cum_len,
-            num_verify_token,
-            CaptureHiddenMode.FULL,
-        )
 
     def prepare_for_verify(self, batch: ScheduleBatch):
         batch.input_ids = self.draft_token
@@ -313,12 +362,6 @@ class EagleVerifyInput:
                 uniform_samples=coins,
                 target_probs=target_probs,
                 draft_probs=draft_probs,
-                threshold_single=global_server_args_dict[
-                    "speculative_accept_threshold_single"
-                ],
-                threshold_acc=global_server_args_dict[
-                    "speculative_accept_threshold_acc"
-                ],
                 deterministic=True,
             )
 

python/sglang/srt/speculative/eagle_worker.py

@@ -185,6 +185,7 @@ class EAGLEWorker(TpModelWorker):
             self.topk,
             self.speculative_num_steps,
             self.server_args.speculative_num_draft_tokens,
+            batch.sampling_info.is_all_greedy,
         )
 
         # Free cache locations