[Perf] Publish the WAR read-done event at DSPARK verify (#34816)

python/sglang/srt/layers/attention/deepseek_v4_backend.py

@@ -506,7 +506,11 @@ class DeepseekV4AttnBackend(
 
     def shared_read_boundary(self, forward_mode: ForwardMode) -> SharedReadBoundary:
         # Breakable-graph verify rereads shared state across segments.
+        # DSPARK verify replays one full (non-breakable) graph that honors the
+        # out-graph/in-graph init contract, so the base IN_REPLAY bound holds.
         if forward_mode.is_target_verify():
+            if self.model_runner.spec_algorithm.is_dspark():
+                return SharedReadBoundary.IN_REPLAY
             return SharedReadBoundary.POST_REPLAY
         return super().shared_read_boundary(forward_mode)
 

python/sglang/srt/speculative/spec_info.py

@@ -128,8 +128,10 @@ class SpeculativeAlgorithm(Enum):
         return self.is_dflash_family()
 
     def is_war_publish_phase(self, forward_mode) -> bool:
-        # The step's last shared-buffer-reading phase owns the WAR read-done publish.
-        if self.is_dflash_family():
+        # The step's last shared-buffer-reading phase owns the WAR read-done
+        # publish. DSPARK has no draft_extend: its draft samples inside the
+        # verify graph, so verify is that last phase.
+        if self.is_dflash_family() or self.is_dspark():
             return forward_mode.is_target_verify()
         return forward_mode.is_draft_extend_v2()