Add logging for cudagraph related info (#29825)

Signed-off-by: Yong Hoon Shin <yhshin@meta.com>

vllm/v1/core/sched/scheduler.py

@@ -7,6 +7,7 @@ from collections.abc import Iterable
 from typing import Any
 
 from vllm import envs
+from vllm.compilation.cuda_graph import CUDAGraphStat
 from vllm.config import VllmConfig
 from vllm.distributed.ec_transfer.ec_connector.base import (
     ECConnectorMetadata,
@@ -1037,6 +1038,7 @@ class Scheduler(SchedulerInterface):
         pooler_outputs = model_runner_output.pooler_output
         num_nans_in_logits = model_runner_output.num_nans_in_logits
         kv_connector_output = model_runner_output.kv_connector_output
+        cudagraph_stats = model_runner_output.cudagraph_stats
 
         outputs: dict[int, list[EngineCoreOutput]] = defaultdict(list)
         spec_decoding_stats: SpecDecodingStats | None = None
@@ -1219,7 +1221,9 @@ class Scheduler(SchedulerInterface):
             finished_req_ids.clear()
 
         if (
-            stats := self.make_stats(spec_decoding_stats, kv_connector_stats)
+            stats := self.make_stats(
+                spec_decoding_stats, kv_connector_stats, cudagraph_stats
+            )
         ) is not None:
             # Return stats to only one of the front-ends.
             if (eco := next(iter(engine_core_outputs.values()), None)) is None:
@@ -1420,6 +1424,7 @@ class Scheduler(SchedulerInterface):
         self,
         spec_decoding_stats: SpecDecodingStats | None = None,
         kv_connector_stats: KVConnectorStats | None = None,
+        cudagraph_stats: CUDAGraphStat | None = None,
     ) -> SchedulerStats | None:
         if not self.log_stats:
             return None
@@ -1444,6 +1449,7 @@ class Scheduler(SchedulerInterface):
             kv_cache_eviction_events=eviction_events,
             spec_decoding_stats=spec_stats,
             kv_connector_stats=connector_stats_payload,
+            cudagraph_stats=cudagraph_stats,
         )
 
     def make_spec_decoding_stats(