Support penalty in overlap mode; return logprob with chunked prefill; improve...

Support penalty in overlap mode; return logprob with chunked prefill; improve benchmark scripts (#3988)
Co-authored-by: SangBin Cho <rkooo567@gmail.com>
Co-authored-by: dhou-xai <dhou@x.ai>
Co-authored-by: Hanming Lu <hanming_lu@berkeley.edu>

benchmark/kernels/fused_moe_triton/benchmark_torch_compile_fused_moe.py

@@ -30,11 +30,20 @@ def get_model_config(model_name: str, tp_size: int):
         topk = config.num_experts_per_tok
         intermediate_size = config.moe_intermediate_size
         shard_intermediate_size = 2 * intermediate_size // tp_size
+    elif config.architectures[0] in [
+        "Grok1ForCausalLM",
+        "Grok1ImgGen",
+        "Grok1AForCausalLM",
+    ]:
+        E = config.num_local_experts
+        topk = config.num_experts_per_tok
+        intermediate_size = config.moe_intermediate_size
+        shard_intermediate_size = 2 * intermediate_size // tp_size
     elif config.architectures[0] in ["DeepseekV2ForCausalLM", "DeepseekV3ForCausalLM"]:
         E = config.n_routed_experts
         topk = config.num_experts_per_tok
         intermediate_size = config.intermediate_size
-        shard_intermediate_size = 2 * intermediate_size // args.tp_size
+        shard_intermediate_size = 2 * intermediate_size // tp_size
     else:
         # Default: Mixtral
         E = config.num_local_experts

benchmark/kernels/fused_moe_triton/benchmark_vllm_vs_sglang_fused_moe_triton.py

@@ -35,6 +35,15 @@ def get_model_config(model_name: str, tp_size: int):
         topk = config.num_experts_per_tok
         intermediate_size = config.moe_intermediate_size
         shard_intermediate_size = 2 * intermediate_size // tp_size
+    elif config.architectures[0] in [
+        "Grok1ForCausalLM",
+        "Grok1ImgGen",
+        "Grok1AForCausalLM",
+    ]:
+        E = config.num_local_experts
+        topk = config.num_experts_per_tok
+        intermediate_size = config.moe_intermediate_size
+        shard_intermediate_size = 2 * intermediate_size // tp_size
     else:
         # Default: Mixtral
         E = config.num_local_experts

benchmark/kernels/fused_moe_triton/tuning_fused_moe_triton.py

@@ -397,6 +397,15 @@ def main(args: argparse.Namespace):
         topk = config.num_experts_per_tok
         intermediate_size = config.moe_intermediate_size
         shard_intermediate_size = 2 * intermediate_size // args.tp_size
+    elif config.architectures[0] in [
+        "Grok1ForCausalLM",
+        "Grok1ImgGen",
+        "Grok1AForCausalLM",
+    ]:
+        E = config.num_local_experts
+        topk = config.num_experts_per_tok
+        intermediate_size = config.moe_intermediate_size
+        shard_intermediate_size = 2 * intermediate_size // args.tp_size
     else:
         # Default: Mixtral
         E = config.num_local_experts

docs/backend/native_api.ipynb

@@ -210,8 +210,7 @@
     "response = requests.post(url, json=data)\n",
     "print_highlight(response.text)\n",
     "assert response.json()[\"success\"] is True\n",
-    "assert response.json()[\"message\"] == \"Succeeded to update model weights.\"\n",
-    "assert response.json().keys() == {\"success\", \"message\"}"
+    "assert response.json()[\"message\"] == \"Succeeded to update model weights.\""
    ]
   },
   {
@@ -411,7 +410,7 @@
     "    },\n",
     ")\n",
     "output = response.json()\n",
-    "output_tokens = output[\"token_ids\"]\n",
+    "output_tokens = output[\"output_ids\"]\n",
     "\n",
     "output_text = tokenizer.decode(output_tokens, skip_special_tokens=False)\n",
     "print_highlight(f\"Tokenized Output: {output_tokens}\")\n",

docs/backend/server_arguments.md

@@ -96,7 +96,6 @@ Please consult the documentation below to learn more about the parameters you ma
 * `schedule_policy`: The scheduling policy to control the processing order of waiting prefill requests in a single engine.
 * `schedule_conservativeness`: Can be used to decrease/increase the conservativeness of the server when taking new requests. Highly conservative behavior leads to starvation, but low conservativeness leads to slowed-down performance.
 * `cpu_offload_gb`: Reserve this amount of RAM in GB for offloading of model parameters to the CPU.
-* `prefill_only_one_req`: When this flag is turned on, the engine prefills only one request at a time.
 
 ## Other runtime options
 

python/pyproject.toml

@@ -96,7 +96,10 @@ dev_cpu = ["sglang[all_cpu]", "sglang[test]"]
 "Bug Tracker" = "https://github.com/sgl-project/sglang/issues"
 
 [tool.setuptools.package-data]
-"sglang" = ["srt/layers/moe/fused_moe_triton/configs/*.json", "srt/layers/quantization/configs/*.json"]
+"sglang" = [
+    "srt/layers/moe/fused_moe_triton/configs/*.json",
+    "srt/layers/quantization/configs/*.json",
+]
 
 [tool.setuptools.packages.find]
 exclude = [

python/sglang/README.md

@@ -8,8 +8,10 @@
 - `bench_one_batch.py`: Benchmark the latency of running a single static batch without a server.
 - `bench_one_batch_server.py`: Benchmark the latency of running a single batch with a server.
 - `bench_serving.py`: Benchmark online serving with dynamic requests.
-- `check_env.py`: Check the environment variables.
+- `check_env.py`: Check the environment variables and dependencies.
 - `global_config.py`: The global configs and constants.
 - `launch_server.py`: The entry point for launching the local server.
 - `llama3_eval.py`: Evaluation of Llama 3 using the Meta Llama dataset.
+- `profiler.py`: Profile a running server.
 - `utils.py`: Common utilities.
+- `version.py`: Version info.

python/sglang/bench_offline_throughput.py

@@ -56,6 +56,7 @@ class BenchArgs:
     profile: bool = False
     skip_warmup: bool = False
     do_not_exit: bool = False
+    prompt_suffix: str = ""
 
     @staticmethod
     def add_cli_args(parser: argparse.ArgumentParser):
@@ -177,6 +178,12 @@ class BenchArgs:
             action="store_true",
             help="Do not exit the program. This is useful for nsys profile with --duration and --delay.",
         )
+        parser.add_argument(
+            "--prompt-suffix",
+            type=str,
+            default="",
+            help="Suffix applied to the end of all user prompts, followed by assistant prompt suffix.",
+        )
 
     @classmethod
     def from_cli_args(cls, args: argparse.Namespace):
@@ -216,6 +223,10 @@ def throughput_test_once(
     ]
 
     if profile:
+        assert (
+            "SGLANG_TORCH_PROFILER_DIR" in os.environ
+        ), "Please set SGLANG_TORCH_PROFILER_DIR."
+        os.makedirs(os.environ["SGLANG_TORCH_PROFILER_DIR"], exist_ok=True)
         backend.start_profile()
 
     st = time.perf_counter()
@@ -229,6 +240,8 @@ def throughput_test_once(
     if backend_name == "runtime":
         gen_out = json.loads(gen_out)
 
+    server_info = backend.get_server_info()
+
     measurement_results["total_latency"] = latency
     measurement_results["total_output_tokens"] = sum(
         o["meta_info"]["completion_tokens"] for o in gen_out
@@ -246,6 +259,7 @@ def throughput_test_once(
         measurement_results["total_input_tokens"]
         + measurement_results["total_output_tokens"]
     ) / latency
+    measurement_results["last_gen_throughput"] = server_info["last_gen_throughput"]
 
     return measurement_results
 
@@ -361,6 +375,11 @@ def throughput_test(
     print(
         "{:<40} {:<10}".format("Total generated tokens:", result["total_output_tokens"])
     )
+    print(
+        "{:<40} {:<10.2f}".format(
+            "Last generation throughput (tok/s):", result["last_gen_throughput"]
+        )
+    )
     print(
         "{:<40} {:<10.2f}".format(
             "Request throughput (req/s):", result["request_throughput"]

python/sglang/bench_serving.py

@@ -8,7 +8,6 @@ Usage:
 python3 -m sglang.bench_serving --backend sglang --num-prompt 10
 
 python3 -m sglang.bench_serving --backend sglang --dataset-name random --num-prompts 3000 --random-input 1024 --random-output 1024 --random-range-ratio 0.5
-python3 -m sglang.bench_serving --backend sglang --dataset-name random --request-rate-range 1,2,4,8,16,32 --random-input 4096 --random-output 1024 --random-range-ratio 0.125 --multi
 """
 
 import argparse
@@ -71,6 +70,10 @@ def remove_prefix(text: str, prefix: str) -> str:
     return text[len(prefix) :] if text.startswith(prefix) else text
 
 
+def remove_suffix(text: str, suffix: str) -> str:
+    return text[: -len(suffix)] if text.endswith(suffix) else text
+
+
 def get_auth_headers() -> Dict[str, str]:
     api_key = os.environ.get("OPENAI_API_KEY")
     if api_key:
@@ -79,7 +82,7 @@ def get_auth_headers() -> Dict[str, str]:
         return {}
 
 
-# trt llm not support ignore_eos
+# trt llm does not support ignore_eos
 # https://github.com/triton-inference-server/tensorrtllm_backend/issues/505
 async def async_request_trt_llm(
     request_func_input: RequestFuncInput,
@@ -179,6 +182,7 @@ async def async_request_openai_completions(
         output.prompt_len = request_func_input.prompt_len
 
         generated_text = ""
+        output_len = request_func_input.output_len
         ttft = 0.0
         st = time.perf_counter()
         most_recent_timestamp = st
@@ -215,11 +219,14 @@ async def async_request_openai_completions(
 
                                 most_recent_timestamp = timestamp
                                 generated_text += data["choices"][0]["text"]
+                                output_len = data.get("usage", {}).get(
+                                    "completion_tokens", output_len
+                                )
 
                     output.generated_text = generated_text
                     output.success = True
                     output.latency = latency
-                    output.output_len = request_func_input.output_len
+                    output.output_len = output_len
                 else:
                     output.error = response.reason or ""
                     output.success = False
@@ -339,9 +346,11 @@ async def async_request_sglang_generate(
         output.prompt_len = request_func_input.prompt_len
 
         generated_text = ""
+        output_len = request_func_input.output_len
         ttft = 0.0
         st = time.perf_counter()
         most_recent_timestamp = st
+        last_output_len = 0
         try:
             async with session.post(
                 url=api_url, json=payload, headers=headers
@@ -365,6 +374,9 @@ async def async_request_sglang_generate(
                             # want to check a token was generated
                             if data["text"]:
                                 timestamp = time.perf_counter()
+                                generated_text = data["text"]
+                                output_len = data["meta_info"]["completion_tokens"]
+
                                 # First token
                                 if ttft == 0.0:
                                     ttft = time.perf_counter() - st
@@ -372,7 +384,13 @@ async def async_request_sglang_generate(
 
                                 # Decoding phase
                                 else:
-                                    output.itl.append(timestamp - most_recent_timestamp)
+                                    num_new_tokens = output_len - last_output_len
+                                    if num_new_tokens == 0:
+                                        continue
+                                    adjust_itl = (
+                                        timestamp - most_recent_timestamp
+                                    ) / num_new_tokens
+                                    output.itl.extend([adjust_itl] * num_new_tokens)
 
                                 most_recent_timestamp = timestamp
                                 generated_text = data["text"]
@@ -380,7 +398,7 @@ async def async_request_sglang_generate(
                     output.generated_text = generated_text
                     output.success = True
                     output.latency = latency
-                    output.output_len = request_func_input.output_len
+                    output.output_len = output_len
                 else:
                     output.error = response.reason or ""
                     output.success = False
@@ -388,6 +406,7 @@ async def async_request_sglang_generate(
             output.success = False
             exc_info = sys.exc_info()
             output.error = "".join(traceback.format_exception(*exc_info))
+            print(f"{output.error=}")
 
     if pbar:
         pbar.update(1)
@@ -461,6 +480,7 @@ def get_dataset(args, tokenizer):
             tokenizer=tokenizer,
             fixed_output_len=args.sharegpt_output_len,
             context_len=args.sharegpt_context_len,
+            prompt_suffix=args.prompt_suffix,
             apply_chat_template=args.apply_chat_template,
         )
     elif args.dataset_name == "random":
@@ -521,7 +541,9 @@ class BenchmarkMetrics:
     mean_itl_ms: float
     median_itl_ms: float
     std_itl_ms: float
+    p95_itl_ms: float
     p99_itl_ms: float
+    max_itl_ms: float
     mean_e2e_latency_ms: float
     median_e2e_latency_ms: float
     std_e2e_latency_ms: float
@@ -572,6 +594,7 @@ def sample_sharegpt_requests(
     tokenizer: PreTrainedTokenizerBase,
     fixed_output_len: Optional[int] = None,
     context_len: Optional[int] = None,
+    prompt_suffix: Optional[str] = "",
     apply_chat_template=False,
 ) -> List[Tuple[str, int, int]]:
     if fixed_output_len is not None and fixed_output_len < 4:
@@ -584,11 +607,19 @@ def sample_sharegpt_requests(
     # Load the dataset.
     with open(dataset_path) as f:
         dataset = json.load(f)
+
     # Filter out the conversations with less than 2 turns.
-    dataset = [data for data in dataset if len(data["conversations"]) >= 2]
+    dataset = [
+        data
+        for data in dataset
+        if len(data.get("conversations", data.get("conversation", []))) >= 2
+    ]
     # Only keep the first two turns of each conversation.
     dataset = [
-        (data["conversations"][0]["value"], data["conversations"][1]["value"])
+        (
+            data.get("conversations", data.get("conversation", []))[0]["value"],
+            data.get("conversations", data.get("conversation", []))[1]["value"],
+        )
         for data in dataset
     ]
 
@@ -603,6 +634,8 @@ def sample_sharegpt_requests(
 
         # Tokenize the prompts and completions.
         prompt = dataset[i][0]
+        if prompt_suffix:
+            prompt = prompt
 
         if apply_chat_template:
             prompt = tokenizer.apply_chat_template(
@@ -666,10 +699,17 @@ def sample_random_requests(
         with open(dataset_path) as f:
             dataset = json.load(f)
         # Filter out the conversations with less than 2 turns.
-        dataset = [data for data in dataset if len(data["conversations"]) >= 2]
+        dataset = [
+            data
+            for data in dataset
+            if len(data.get("conversations", data.get("conversation", []))) >= 2
+        ]
         # Only keep the first two turns of each conversation.
         dataset = [
-            (data["conversations"][0]["value"], data["conversations"][1]["value"])
+            (
+                data.get("conversations", data.get("conversation", []))[0]["value"],
+                data.get("conversations", data.get("conversation", []))[1]["value"],
+            )
             for data in dataset
         ]
         # Shuffle the dataset.
@@ -895,7 +935,9 @@ def calculate_metrics(
         mean_itl_ms=np.mean(itls or 0) * 1000,
         median_itl_ms=np.median(itls or 0) * 1000,
         std_itl_ms=np.std(itls or 0) * 1000,
+        p95_itl_ms=np.percentile(itls or 0, 95) * 1000,
         p99_itl_ms=np.percentile(itls or 0, 99) * 1000,
+        max_itl_ms=np.max(itls or 0) * 1000,
         mean_e2e_latency_ms=np.mean(e2e_latencies) * 1000,
         median_e2e_latency_ms=np.median(e2e_latencies) * 1000,
         std_e2e_latency_ms=np.std(e2e_latencies) * 1000,
@@ -919,6 +961,7 @@ async def benchmark(
     lora_name: str,
     extra_request_body: Dict[str, Any],
     profile: bool,
+    pd_seperated: bool = False,
 ):
     if backend in ASYNC_REQUEST_FUNCS:
         request_func = ASYNC_REQUEST_FUNCS[backend]
@@ -1004,6 +1047,17 @@ async def benchmark(
     if pbar is not None:
         pbar.close()
 
+    if "sglang" in backend:
+        server_info = requests.get(base_url + "/get_server_info")
+        if pd_seperated:
+            accept_length = server_info.json()["decode"][0].get(
+                "avg_spec_accept_length", None
+            )
+        else:
+            accept_length = server_info.json().get("avg_spec_accept_length", None)
+    else:
+        accept_length = None
+
     # Compute metrics and print results
     benchmark_duration = time.perf_counter() - benchmark_start_time
     metrics, output_lens = calculate_metrics(
@@ -1053,6 +1107,8 @@ async def benchmark(
         )
     )
     print("{:<40} {:<10.2f}".format("Concurrency:", metrics.concurrency))
+    if accept_length:
+        print("{:<40} {:<10.2f}".format("Accept length:", accept_length))
     print("{s:{c}^{n}}".format(s="End-to-End Latency", n=50, c="-"))
     print(
         "{:<40} {:<10.2f}".format("Mean E2E Latency (ms):", metrics.mean_e2e_latency_ms)
@@ -1066,16 +1122,12 @@ async def benchmark(
     print("{:<40} {:<10.2f}".format("Mean TTFT (ms):", metrics.mean_ttft_ms))
     print("{:<40} {:<10.2f}".format("Median TTFT (ms):", metrics.median_ttft_ms))
     print("{:<40} {:<10.2f}".format("P99 TTFT (ms):", metrics.p99_ttft_ms))
-    print(
-        "{s:{c}^{n}}".format(s="Time per Output Token (excl. 1st token)", n=50, c="-")
-    )
-    print("{:<40} {:<10.2f}".format("Mean TPOT (ms):", metrics.mean_tpot_ms))
-    print("{:<40} {:<10.2f}".format("Median TPOT (ms):", metrics.median_tpot_ms))
-    print("{:<40} {:<10.2f}".format("P99 TPOT (ms):", metrics.p99_tpot_ms))
-    print("{s:{c}^{n}}".format(s="Inter-token Latency", n=50, c="-"))
+    print("{s:{c}^{n}}".format(s="Inter-Token Latency", n=50, c="-"))
     print("{:<40} {:<10.2f}".format("Mean ITL (ms):", metrics.mean_itl_ms))
     print("{:<40} {:<10.2f}".format("Median ITL (ms):", metrics.median_itl_ms))
+    print("{:<40} {:<10.2f}".format("P95 ITL (ms):", metrics.p95_itl_ms))
     print("{:<40} {:<10.2f}".format("P99 ITL (ms):", metrics.p99_itl_ms))
+    print("{:<40} {:<10.2f}".format("Max ITL (ms):", metrics.max_itl_ms))
     print("=" * 50)
 
     if (
@@ -1117,8 +1169,10 @@ async def benchmark(
             "mean_itl_ms": metrics.mean_itl_ms,
             "median_itl_ms": metrics.median_itl_ms,
             "std_itl_ms": metrics.std_itl_ms,
+            "p95_itl_ms": metrics.p95_itl_ms,
             "p99_itl_ms": metrics.p99_itl_ms,
             "concurrency": metrics.concurrency,
+            "accept_length": accept_length,
         }
     else:
         print(f"Error running benchmark for request rate: {request_rate}")
@@ -1151,14 +1205,6 @@ async def benchmark(
     return result
 
 
-def parse_request_rate_range(request_rate_range):
-    if len(request_rate_range.split(",")) == 3:
-        start, stop, step = map(int, request_rate_range.split(","))
-        return list(range(start, stop, step))
-    else:
-        return list(map(int, request_rate_range.split(",")))
-
-
 def check_chat_template(model_path):
     try:
         tokenizer = AutoTokenizer.from_pretrained(model_path, trust_remote_code=True)
@@ -1168,6 +1214,12 @@ def check_chat_template(model_path):
         return False
 
 
+def set_global_args(args_: argparse.Namespace):
+    """Set the global args."""
+    global args
+    args = args_
+
+
 def run_benchmark(args_: argparse.Namespace):
     global args
     args = args_
@@ -1176,6 +1228,8 @@ def run_benchmark(args_: argparse.Namespace):
     if not hasattr(args, "max_concurrency"):
         args.max_concurrency = None
 
+    print(f"benchmark_args={args}")
+
     # Set global environments
     set_ulimit()
     random.seed(args.seed)
@@ -1272,12 +1326,9 @@ def run_benchmark(args_: argparse.Namespace):
     backend = args.backend
     model_id = args.model
     tokenizer_id = args.tokenizer if args.tokenizer is not None else args.model
-
     tokenizer = get_tokenizer(tokenizer_id)
-
     input_requests = get_dataset(args, tokenizer)
 
-    if not args.multi:
     return asyncio.run(
         benchmark(
             backend=backend,
@@ -1292,27 +1343,7 @@ def run_benchmark(args_: argparse.Namespace):
             lora_name=args.lora_name,
             extra_request_body=extra_request_body,
             profile=args.profile,
-            )
-        )
-    else:
-        # Benchmark multiple rps. TODO: use a fixed duration to compute num_prompts
-        request_rates = parse_request_rate_range(args.request_rate_range)
-
-        for rate in request_rates:
-            asyncio.run(
-                benchmark(
-                    backend=backend,
-                    api_url=api_url,
-                    base_url=base_url,
-                    model_id=model_id,
-                    tokenizer=tokenizer,
-                    input_requests=input_requests,
-                    request_rate=rate,
-                    max_concurrency=args.max_concurrency,
-                    disable_tqdm=args.disable_tqdm,
-                    lora_name=args.lora_name,
-                    extra_request_body=extra_request_body,
-                    profile=args.profile,
+            pd_seperated=args.pd_seperated,
         )
     )
 
@@ -1428,17 +1459,6 @@ if __name__ == "__main__":
         "actual request rate may be lower than specified with --request-rate, "
         "if the server is not processing requests fast enough to keep up.",
     )
-    parser.add_argument(
-        "--multi",
-        action="store_true",
-        help="Use request rate range rather than single value.",
-    )
-    parser.add_argument(
-        "--request-rate-range",
-        type=str,
-        default="2,34,2",
-        help="Range of request rates in the format start,stop,step. Default is 2,34,2. It also supports a list of request rates, requiring the parameters to not equal three.",
-    )
     parser.add_argument("--output-file", type=str, help="Output JSONL file name.")
     parser.add_argument(
         "--disable-tqdm",
@@ -1485,6 +1505,17 @@ if __name__ == "__main__":
         default=None,
         help="The name of LoRA adapter",
     )
+    parser.add_argument(
+        "--prompt-suffix",
+        type=str,
+        default="",
+        help="Suffix applied to the end of all user prompts, followed by assistant prompt suffix.",
+    )
+    parser.add_argument(
+        "--pd-seperated",
+        action="store_true",
+        help="Benchmark PD disaggregation server",
+    )
 
     group = parser.add_argument_group("generated-shared-prefix dataset arguments")
     group.add_argument(

python/sglang/global_config.py

@@ -34,11 +34,9 @@ class GlobalConfig:
         self.skip_special_tokens_in_output = True
         self.spaces_between_special_tokens_in_out = True
 
-        # Interpreter optimization configs
+        # Language frontend interpreter optimization configs
         self.enable_precache_with_tracing = True
         self.enable_parallel_encoding = True
 
-        self.enable_flashinfer_mla = False
-
 
 global_config = GlobalConfig()

python/sglang/lang/backend/runtime_endpoint.py

@@ -329,7 +329,12 @@ class RuntimeEndpoint(BaseBackend):
 
 def compute_normalized_prompt_logprobs(input_logprobs):
     values = [x[0] for x in input_logprobs if x[0]]
+    try:
         return sum(values) / len(values)
+    except TypeError:
+        print(f"{input_logprobs=}", flush=True)
+        print(f"{input_logprobs[0]=}", flush=True)
+        exit(-1)
 
 
 class Runtime:

python/sglang/srt/configs/load_config.py

@@ -21,6 +21,7 @@ class LoadFormat(str, enum.Enum):
     BITSANDBYTES = "bitsandbytes"
     MISTRAL = "mistral"
     LAYERED = "layered"
+    JAX = "jax"
 
 
 @dataclass
@@ -42,13 +43,15 @@ class LoadConfig:
     ignore_patterns: The list of patterns to ignore when loading the model.
         Default to "original/**/*" to avoid repeated loading of llama's
         checkpoints.
-
+    decryption_key_file: If set, decrypts the output files with a password read
+        from this file (after PBKDF2).
     """
 
     load_format: Union[str, LoadFormat] = LoadFormat.AUTO
     download_dir: Optional[str] = None
     model_loader_extra_config: Optional[Union[str, dict]] = field(default_factory=dict)
     ignore_patterns: Optional[Union[List[str], str]] = None
+    decryption_key_file: Optional[str] = None
 
     def __post_init__(self):
         model_loader_extra_config = self.model_loader_extra_config or {}

python/sglang/srt/configs/model_config.py

@@ -44,6 +44,7 @@ class ModelConfig:
         is_embedding: Optional[bool] = None,
         dtype: str = "auto",
         quantization: Optional[str] = None,
+        override_config_file: Optional[str] = None,
     ) -> None:
         self.model_path = model_path
         self.revision = revision
@@ -51,11 +52,16 @@ class ModelConfig:
 
         # Parse args
         self.model_override_args = json.loads(model_override_args)
+        kwargs = {}
+        if override_config_file and override_config_file.strip():
+            kwargs["_configuration_file"] = override_config_file.strip()
+
         self.hf_config = get_config(
             model_path,
             trust_remote_code=trust_remote_code,
             revision=revision,
             model_override_args=self.model_override_args,
+            **kwargs,
         )
         self.hf_text_config = get_hf_text_config(self.hf_config)
 
@@ -64,6 +70,9 @@ class ModelConfig:
             self.hf_config.architectures, is_embedding
         )
         self.is_multimodal = is_multimodal_model(self.hf_config.architectures)
+        self.is_multimodal_gen = is_multimodal_gen_model(self.hf_config.architectures)
+        self.is_image_gen = is_image_gen_model(self.hf_config.architectures)
+        self.is_audio_model = is_audio_model(self.hf_config.architectures)
         self.is_encoder_decoder = is_encoder_decoder_model(self.hf_config.architectures)
         self.dtype = _get_and_verify_dtype(self.hf_text_config, dtype)
 
@@ -71,7 +80,9 @@ class ModelConfig:
         derived_context_len = get_context_length(self.hf_text_config)
         if context_length is not None:
             if context_length > derived_context_len:
-                if get_bool_env_var("SGLANG_ALLOW_OVERWRITE_LONGER_CONTEXT_LEN"):
+                if get_bool_env_var(
+                    "SGLANG_ALLOW_OVERWRITE_LONGER_CONTEXT_LEN", default="False"
+                ):
                     logger.warning(
                         f"Warning: User-specified context_length ({context_length}) is greater than the derived context_length ({derived_context_len}). "
                         f"This may lead to incorrect model outputs or CUDA errors."
@@ -416,6 +427,8 @@ def is_multimodal_model(model_architectures: List[str]):
         or "LlavaQwenForCausalLM" in model_architectures
         or "LlavaMistralForCausalLM" in model_architectures
         or "LlavaVidForCausalLM" in model_architectures
+        or "Grok1VForCausalLM" in model_architectures
+        or "Grok1AForCausalLM" in model_architectures
         or "MllamaForConditionalGeneration" in model_architectures
         or "Qwen2VLForConditionalGeneration" in model_architectures
         or "Qwen2_5_VLForConditionalGeneration" in model_architectures
@@ -426,6 +439,18 @@ def is_multimodal_model(model_architectures: List[str]):
         return False
 
 
+def is_multimodal_gen_model(model_architectures: List[str]):
+    return False
+
+
+def is_image_gen_model(model_architectures: List[str]):
+    return False
+
+
+def is_audio_model(model_architectures: List[str]):
+    return False
+
+
 def is_encoder_decoder_model(model_architectures: List[str]):
     return "MllamaForConditionalGeneration" in model_architectures
 

python/sglang/srt/constrained/xgrammar_backend.py

@@ -15,7 +15,7 @@
 
 import json
 import logging
-from typing import List, Tuple
+from typing import List, Optional, Tuple, Union
 
 import torch
 from xgrammar import (
@@ -42,11 +42,16 @@ MAX_ROLLBACK_TOKENS = 200
 class XGrammarGrammar(BaseGrammarObject):
 
     def __init__(
-        self, matcher: GrammarMatcher, vocab_size: int, ctx: CompiledGrammar
+        self,
+        matcher: GrammarMatcher,
+        vocab_size: int,
+        ctx: CompiledGrammar,
+        override_stop_tokens: Optional[Union[List[int], int]],
     ) -> None:
         self.matcher = matcher
         self.vocab_size = vocab_size
         self.ctx = ctx
+        self.override_stop_tokens = override_stop_tokens
         self.finished = False
 
     def accept_token(self, token: int):
@@ -96,8 +101,14 @@ class XGrammarGrammar(BaseGrammarObject):
         apply_token_bitmask_inplace(logits, vocab_mask)
 
     def copy(self):
-        matcher = GrammarMatcher(self.ctx, max_rollback_tokens=MAX_ROLLBACK_TOKENS)
-        return XGrammarGrammar(matcher, self.vocab_size, self.ctx)
+        matcher = GrammarMatcher(
+            self.ctx,
+            max_rollback_tokens=MAX_ROLLBACK_TOKENS,
+            override_stop_tokens=self.override_stop_tokens,
+        )
+        return XGrammarGrammar(
+            matcher, self.vocab_size, self.ctx, self.override_stop_tokens
+        )
 
 
 class XGrammarGrammarBackend(BaseGrammarBackend):
@@ -111,8 +122,11 @@ class XGrammarGrammarBackend(BaseGrammarBackend):
         tokenizer_info = TokenizerInfo.from_huggingface(
             tokenizer, vocab_size=vocab_size
         )
+        override_stop_tokens = None
+
         self.grammar_compiler = GrammarCompiler(tokenizer_info=tokenizer_info)
         self.vocab_size = vocab_size
+        self.override_stop_tokens = override_stop_tokens
 
     def init_value_impl(self, key: Tuple[str, str]) -> XGrammarGrammar:
 
@@ -161,7 +175,7 @@ class XGrammarGrammarBackend(BaseGrammarBackend):
             raise ValueError(f"Invalid key_type: {key_type}")
 
         matcher = GrammarMatcher(ctx, max_rollback_tokens=MAX_ROLLBACK_TOKENS)
-        return XGrammarGrammar(matcher, self.vocab_size, ctx)
+        return XGrammarGrammar(matcher, self.vocab_size, ctx, self.override_stop_tokens)
 
     def reset(self):
         if self.grammar_compiler:

python/sglang/srt/entrypoints/engine.py

@@ -121,6 +121,7 @@ class Engine:
         return_logprob: Optional[Union[List[bool], bool]] = False,
         logprob_start_len: Optional[Union[List[int], int]] = None,
         top_logprobs_num: Optional[Union[List[int], int]] = None,
+        token_ids_logprob: Optional[Union[List[List[int]], List[int]]] = None,
         lora_path: Optional[List[Optional[str]]] = None,
         custom_logit_processor: Optional[Union[List[str], str]] = None,
         return_hidden_states: bool = False,
@@ -142,6 +143,7 @@ class Engine:
             return_logprob=return_logprob,
             logprob_start_len=logprob_start_len,
             top_logprobs_num=top_logprobs_num,
+            token_ids_logprob=token_ids_logprob,
             lora_path=lora_path,
             modalities=modalities_list,
             custom_logit_processor=custom_logit_processor,
@@ -179,6 +181,7 @@ class Engine:
         return_logprob: Optional[Union[List[bool], bool]] = False,
         logprob_start_len: Optional[Union[List[int], int]] = None,
         top_logprobs_num: Optional[Union[List[int], int]] = None,
+        token_ids_logprob: Optional[Union[List[List[int]], List[int]]] = None,
         lora_path: Optional[List[Optional[str]]] = None,
         custom_logit_processor: Optional[Union[List[str], str]] = None,
         stream: bool = False,
@@ -195,6 +198,7 @@ class Engine:
             return_logprob=return_logprob,
             logprob_start_len=logprob_start_len,
             top_logprobs_num=top_logprobs_num,
+            token_ids_logprob=token_ids_logprob,
             lora_path=lora_path,
             stream=stream,
             custom_logit_processor=custom_logit_processor,
@@ -226,15 +230,22 @@ class Engine:
         kill_process_tree(os.getpid(), include_parent=False)
 
     def start_profile(self):
-        self.tokenizer_manager.start_profile()
+        loop = asyncio.get_event_loop()
+        loop.run_until_complete(self.tokenizer_manager.start_profile())
 
     def stop_profile(self):
         self.tokenizer_manager.stop_profile()
 
     def get_server_info(self):
+        loop = asyncio.get_event_loop()
+        internal_states = loop.run_until_complete(
+            self.tokenizer_manager.get_internal_state()
+        )
+
         return {
-            **dataclasses.asdict(self.tokenizer_manager.server_args),  # server args
+            **dataclasses.asdict(self.tokenizer_manager.server_args),
             **self.scheduler_info,
+            **internal_states,
             "version": __version__,
         }
 
@@ -323,6 +334,7 @@ def _set_envs_and_config(server_args: ServerArgs):
     os.environ["NCCL_NVLS_ENABLE"] = str(int(server_args.enable_nccl_nvls))
     os.environ["TORCH_NCCL_AVOID_RECORD_STREAMS"] = "1"
     os.environ["CUDA_DEVICE_MAX_CONNECTIONS"] = "4"
+    os.environ["CUDA_MODULE_LOADING"] = "AUTO"
 
     # Set prometheus env vars
     if server_args.enable_metrics:
@@ -346,12 +358,23 @@ def _set_envs_and_config(server_args: ServerArgs):
             "at https://docs.flashinfer.ai/installation.html.",
         )
 
+    def sigchld_handler(signum, frame):
+        pid, exitcode = os.waitpid(0, os.WNOHANG)
+        if exitcode != 0:
+            logger.warning(
+                "Child process unexpectedly failed with an exit code %d. pid=%d",
+                exitcode,
+                pid,
+            )
+
+    signal.signal(signal.SIGCHLD, sigchld_handler)
+
     # Register the signal handler.
     # The child processes will send SIGQUIT to this process when any error happens
     # This process then clean up the whole process tree
     def sigquit_handler(signum, frame):
         logger.error(
-            "Received sigquit from a child proces. It usually means the child failed."
+            "Received sigquit from a child process. It usually means the child failed."
         )
         kill_process_tree(os.getpid())
 

python/sglang/srt/entrypoints/http_server.py

@@ -25,11 +25,14 @@ import os
 import threading
 import time
 from http import HTTPStatus
-from typing import AsyncIterator, Dict, Optional
+from typing import AsyncIterator, Callable, Dict, Optional
 
 # Fix a bug of Python threading
 setattr(threading, "_register_atexit", lambda *args, **kwargs: None)
 
+from contextlib import asynccontextmanager
+
+import numpy as np
 import orjson
 import requests
 import uvicorn
@@ -49,8 +52,10 @@ from sglang.srt.managers.io_struct import (
     InitWeightsUpdateGroupReqInput,
     OpenSessionReqInput,
     ParseFunctionCallReq,
+    ProfileReqInput,
     ReleaseMemoryOccupationReqInput,
     ResumeMemoryOccupationReqInput,
+    SetInternalStateReq,
     UpdateWeightFromDiskReqInput,
     UpdateWeightsFromDistributedReqInput,
     VertexGenerateReqInput,
@@ -78,22 +83,13 @@ from sglang.srt.utils import (
     kill_process_tree,
     set_uvicorn_logging_configs,
 )
+from sglang.srt.warmup import execute_warmups
 from sglang.utils import get_exception_traceback
 from sglang.version import __version__
 
 logger = logging.getLogger(__name__)
 asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
 
-# Fast API
-app = FastAPI()
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
-
 
 # Store global states
 @dataclasses.dataclass
@@ -110,6 +106,34 @@ def set_global_state(global_state: _GlobalState):
     _global_state = global_state
 
 
+@asynccontextmanager
+async def lifespan(fast_api_app: FastAPI):
+    server_args: ServerArgs = fast_api_app.server_args
+    if server_args.warmups is not None:
+        await execute_warmups(
+            server_args.warmups.split(","), _global_state.tokenizer_manager
+        )
+        logger.info("Warmup ended")
+
+    warmup_thread = getattr(fast_api_app, "warmup_thread", None)
+    if warmup_thread is not None:
+        warmup_thread.start()
+    yield
+
+
+# Fast API
+app = FastAPI(lifespan=lifespan)
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+HEALTH_CHECK_TIMEOUT = int(os.getenv("SGLANG_HEALTH_CHECK_TIMEOUT", 20))
+
+
 ##### Native API endpoints #####
 
 
@@ -123,23 +147,47 @@ async def health() -> Response:
 async def health_generate(request: Request) -> Response:
     """Check the health of the inference server by generating one token."""
 
-    sampling_params = {"max_new_tokens": 1, "temperature": 0.7}
+    sampling_params = {"max_new_tokens": 1, "temperature": 0.0}
+    rid = f"HEALTH_CHECK_{time.time()}"
 
-    if _global_state.tokenizer_manager.is_generation:
+    if _global_state.tokenizer_manager.is_image_gen:
+        raise NotImplementedError()
+    elif _global_state.tokenizer_manager.is_generation:
         gri = GenerateReqInput(
-            input_ids=[0], sampling_params=sampling_params, log_metrics=False
+            rid=rid,
+            input_ids=[0],
+            sampling_params=sampling_params,
+            log_metrics=False,
         )
     else:
         gri = EmbeddingReqInput(
-            input_ids=[0], sampling_params=sampling_params, log_metrics=False
+            rid=rid, input_ids=[0], sampling_params=sampling_params, log_metrics=False
         )
 
-    try:
+    async def gen():
         async for _ in _global_state.tokenizer_manager.generate_request(gri, request):
             break
+
+    tic = time.time()
+    task = asyncio.create_task(gen())
+    while time.time() < tic + HEALTH_CHECK_TIMEOUT:
+        await asyncio.sleep(1)
+        if _global_state.tokenizer_manager.last_receive_tstamp > tic:
+            task.cancel()
+            _global_state.tokenizer_manager.rid_to_state.pop(rid, None)
             return Response(status_code=200)
-    except Exception as e:
-        logger.exception(e)
+
+    task.cancel()
+    tic_time = time.strftime("%H:%M:%S", time.localtime(tic))
+    last_receive_time = time.strftime(
+        "%H:%M:%S", time.localtime(_global_state.tokenizer_manager.last_receive_tstamp)
+    )
+    logger.error(
+        f"Health check failed. Server couldn't get a response from detokenizer for last "
+        f"{HEALTH_CHECK_TIMEOUT} seconds. tic start time: {tic_time}. "
+        f"last_heartbeat time: {last_receive_time}"
+    )
+    _global_state.tokenizer_manager.rid_to_state.pop(rid, None)
     return Response(status_code=503)
 
 
@@ -156,13 +204,21 @@ async def get_model_info():
 
 @app.get("/get_server_info")
 async def get_server_info():
+    internal_states = await _global_state.tokenizer_manager.get_internal_state()
     return {
         **dataclasses.asdict(_global_state.tokenizer_manager.server_args),
         **_global_state.scheduler_info,
+        **internal_states,
         "version": __version__,
     }
 
 
+@app.api_route("/set_internal_state", methods=["POST", "PUT"])
+async def set_internal_state(obj: SetInternalStateReq, request: Request):
+    res = await _global_state.tokenizer_manager.set_internal_state(obj)
+    return res
+
+
 # fastapi implicitly converts json in the request to obj (dataclass)
 @app.api_route("/generate", methods=["POST", "PUT"])
 async def generate_request(obj: GenerateReqInput, request: Request):
@@ -179,6 +235,7 @@ async def generate_request(obj: GenerateReqInput, request: Request):
                     ) + b"\n\n"
             except ValueError as e:
                 out = {"error": {"message": str(e)}}
+                logger.error(f"Error: {e}")
                 yield b"data: " + orjson.dumps(
                     out, option=orjson.OPT_NON_STR_KEYS
                 ) + b"\n\n"
@@ -236,9 +293,14 @@ async def flush_cache():
 
 
 @app.api_route("/start_profile", methods=["GET", "POST"])
-async def start_profile_async():
+async def start_profile_async(obj: Optional[ProfileReqInput] = None):
     """Start profiling."""
-    _global_state.tokenizer_manager.start_profile()
+    if obj is None:
+        obj = ProfileReqInput()
+
+    await _global_state.tokenizer_manager.start_profile(
+        obj.output_dir, obj.num_steps, obj.activities
+    )
     return Response(
         content="Start profiling.\n",
         status_code=200,
@@ -257,11 +319,15 @@ async def stop_profile_async():
 
 @app.post("/update_weights_from_disk")
 async def update_weights_from_disk(obj: UpdateWeightFromDiskReqInput, request: Request):
-    """Update the weights from disk in-place without re-launching the server."""
-    success, message = await _global_state.tokenizer_manager.update_weights_from_disk(
-        obj, request
+    """Update the weights from disk inplace without re-launching the server."""
+    success, message, num_paused_requests = (
+        await _global_state.tokenizer_manager.update_weights_from_disk(obj, request)
     )
-    content = {"success": success, "message": message}
+    content = {
+        "success": success,
+        "message": message,
+        "num_paused_requests": num_paused_requests,
+    }
     if success:
         return ORJSONResponse(
             content,
@@ -323,7 +389,7 @@ async def get_weights_by_name(obj: GetWeightsByNameReqInput, request: Request):
 async def release_memory_occupation(
     obj: ReleaseMemoryOccupationReqInput, request: Request
 ):
-    """Release GPU occupation temporarily"""
+    """Release GPU memory occupation temporarily."""
     try:
         await _global_state.tokenizer_manager.release_memory_occupation(obj, request)
     except Exception as e:
@@ -334,7 +400,7 @@ async def release_memory_occupation(
 async def resume_memory_occupation(
     obj: ResumeMemoryOccupationReqInput, request: Request
 ):
-    """Resume GPU occupation"""
+    """Resume GPU memory occupation."""
     try:
         await _global_state.tokenizer_manager.resume_memory_occupation(obj, request)
     except Exception as e:
@@ -357,7 +423,7 @@ async def open_session(obj: OpenSessionReqInput, request: Request):
 
 @app.api_route("/close_session", methods=["GET", "POST"])
 async def close_session(obj: CloseSessionReqInput, request: Request):
-    """Close the session"""
+    """Close the session."""
     try:
         await _global_state.tokenizer_manager.close_session(obj, request)
         return Response(status_code=200)
@@ -367,7 +433,7 @@ async def close_session(obj: CloseSessionReqInput, request: Request):
 
 @app.api_route("/configure_logging", methods=["GET", "POST"])
 async def configure_logging(obj: ConfigureLoggingReq, request: Request):
-    """Close the session"""
+    """Configure the request logging options."""
     _global_state.tokenizer_manager.configure_logging(obj)
     return Response(status_code=200)
 
@@ -511,6 +577,7 @@ def _create_error_response(e):
 def launch_server(
     server_args: ServerArgs,
     pipe_finish_writer: Optional[multiprocessing.connection.Connection] = None,
+    launch_callback: Optional[Callable[[], None]] = None,
 ):
     """
     Launch SRT (SGLang Runtime) Server.
@@ -544,21 +611,23 @@ def launch_server(
         add_prometheus_middleware(app)
         enable_func_timer()
 
-    # Send a warmup request
-    t = threading.Thread(
+    # Send a warmup request - we will create the thread launch it
+    # in the lifespan after all other warmups have fired.
+    warmup_thread = threading.Thread(
         target=_wait_and_warmup,
         args=(
             server_args,
             pipe_finish_writer,
             _global_state.tokenizer_manager.image_token_id,
+            launch_callback,
         ),
     )
-    t.start()
+    app.warmup_thread = warmup_thread
 
     try:
         # Update logging configs
         set_uvicorn_logging_configs()
-
+        app.server_args = server_args
         # Listen for HTTP requests
         uvicorn.run(
             app,
@@ -569,10 +638,15 @@ def launch_server(
             loop="uvloop",
         )
     finally:
-        t.join()
+        warmup_thread.join()
 
 
-def _wait_and_warmup(server_args, pipe_finish_writer, image_token_text):
+def _wait_and_warmup(
+    server_args: ServerArgs,
+    pipe_finish_writer: Optional[multiprocessing.connection.Connection],
+    image_token_text: str,
+    launch_callback: Optional[Callable[[], None]] = None,
+):
     headers = {}
     url = server_args.url()
     if server_args.api_key:
@@ -614,8 +688,16 @@ def _wait_and_warmup(server_args, pipe_finish_writer, image_token_text):
     else:
         json_data["text"] = "The capital city of France is"
 
+    # Debug dumping
+    if server_args.debug_tensor_dump_input_file:
+        json_data.pop("text", None)
+        json_data["input_ids"] = np.load(
+            server_args.debug_tensor_dump_input_file
+        ).tolist()
+        json_data["sampling_params"]["max_new_tokens"] = 0
+
     try:
-        for _ in range(server_args.dp_size):
+        for i in range(server_args.dp_size):
             res = requests.post(
                 url + request_name,
                 json=json_data,
@@ -640,3 +722,9 @@ def _wait_and_warmup(server_args, pipe_finish_writer, image_token_text):
 
     if server_args.delete_ckpt_after_loading:
         delete_directory(server_args.model_path)
+
+    if server_args.debug_tensor_dump_input_file:
+        kill_process_tree(os.getpid())
+
+    if launch_callback is not None:
+        launch_callback()

python/sglang/srt/entrypoints/verl_engine.py

@@ -60,6 +60,7 @@ class VerlEngine:
         return_logprob: Optional[Union[List[bool], bool]] = False,
         logprob_start_len: Optional[Union[List[int], int]] = None,
         top_logprobs_num: Optional[Union[List[int], int]] = None,
+        token_ids_logprob: Optional[Union[List[List[int]], List[int]]] = None,
         lora_path: Optional[List[Optional[str]]] = None,
         custom_logit_processor: Optional[Union[List[str], str]] = None,
     ) -> Dict:
@@ -76,6 +77,7 @@ class VerlEngine:
                 return_logprob=return_logprob,
                 logprob_start_len=logprob_start_len,
                 top_logprobs_num=top_logprobs_num,
+                token_ids_logprob=token_ids_logprob,
                 lora_path=lora_path,
                 custom_logit_processor=custom_logit_processor,
             )

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

 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Optional, Union
 
 import torch
 
 if TYPE_CHECKING:
     from sglang.srt.layers.radix_attention import RadixAttention
     from sglang.srt.model_executor.forward_batch_info import ForwardBatch, ForwardMode
-    from sglang.srt.speculative.spec_info import SpecInfo
+    from sglang.srt.speculative.eagle_utils import EagleDraftInput, EagleVerifyInput
 
 
 class AttentionBackend(ABC):
@@ -31,7 +31,7 @@ class AttentionBackend(ABC):
         seq_lens: torch.Tensor,
         encoder_lens: Optional[torch.Tensor],
         forward_mode: ForwardMode,
-        spec_info: Optional[SpecInfo],
+        spec_info: Optional[Union[EagleDraftInput, EagleVerifyInput]],
     ):
         """Init the metadata for a forward pass for capturing a cuda graph."""
         raise NotImplementedError()
@@ -44,7 +44,7 @@ class AttentionBackend(ABC):
         seq_lens_sum: int,
         encoder_lens: Optional[torch.Tensor],
         forward_mode: ForwardMode,
-        spec_info: Optional[SpecInfo],
+        spec_info: Optional[Union[EagleDraftInput, EagleVerifyInput]],
     ):
         """Init the metadata for a forward pass for replying a cuda graph."""
         raise NotImplementedError()
@@ -64,7 +64,14 @@ class AttentionBackend(ABC):
     ):
         """Run forward on an attention layer."""
         if forward_batch.forward_mode.is_decode():
-            return self.forward_decode(q, k, v, layer, forward_batch, save_kv_cache)
+            return self.forward_decode(
+                q,
+                k,
+                v,
+                layer,
+                forward_batch,
+                save_kv_cache=save_kv_cache,
+            )
         else:
             return self.forward_extend(
                 q,
@@ -72,7 +79,7 @@ class AttentionBackend(ABC):
                 v,
                 layer,
                 forward_batch,
-                save_kv_cache,
+                save_kv_cache=save_kv_cache,
             )
 
     def forward_decode(

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

@@ -68,6 +68,7 @@ class FlashInferAttnBackend(AttentionBackend):
         model_runner: ModelRunner,
         skip_prefill: bool = False,
         kv_indptr_buf: Optional[torch.Tensor] = None,
+        kv_last_page_len_buf: Optional[torch.Tensor] = None,
     ):
         super().__init__()
 
@@ -125,9 +126,14 @@ class FlashInferAttnBackend(AttentionBackend):
             assert self.num_wrappers == 1
             self.kv_indptr = [kv_indptr_buf]
 
+        if kv_last_page_len_buf is None:
             self.kv_last_page_len = torch.ones(
                 (max_bs,), dtype=torch.int32, device=model_runner.device
             )
+        else:
+            assert self.num_wrappers == 1
+            self.kv_last_page_len = kv_last_page_len_buf
+
         self.qo_indptr = [
             torch.zeros((max_bs + 1,), dtype=torch.int32, device=model_runner.device)
             for _ in range(self.num_wrappers)
@@ -922,6 +928,9 @@ class FlashInferMultiStepDraftBackend:
             dtype=torch.int32,
             device=model_runner.device,
         )
+        self.kv_last_page_len = torch.ones(
+            (max_bs,), dtype=torch.int32, device=model_runner.device
+        )
         self.attn_backends = []
         for i in range(self.speculative_num_steps):
             self.attn_backends.append(
@@ -929,6 +938,7 @@ class FlashInferMultiStepDraftBackend:
                     model_runner,
                     skip_prefill=True,
                     kv_indptr_buf=self.kv_indptr[i],
+                    kv_last_page_len_buf=self.kv_last_page_len,
                 )
             )
         self.max_context_len = self.attn_backends[0].max_context_len

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

 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Optional, Union
 
 import torch
 import triton
@@ -15,7 +15,7 @@ from sglang.srt.model_executor.forward_batch_info import ForwardBatch, ForwardMo
 if TYPE_CHECKING:
     from sglang.srt.layers.radix_attention import RadixAttention
     from sglang.srt.model_executor.model_runner import ModelRunner
-    from sglang.srt.speculative.spec_info import SpecInfo
+    from sglang.srt.speculative.eagle_utils import EagleDraftInput, EagleVerifyInput
 
 
 class TritonAttnBackend(AttentionBackend):
@@ -232,7 +232,7 @@ class TritonAttnBackend(AttentionBackend):
         seq_lens: torch.Tensor,
         encoder_lens: Optional[torch.Tensor],
         forward_mode: ForwardMode,
-        spec_info: Optional[SpecInfo],
+        spec_info: Optional[Union[EagleDraftInput, EagleVerifyInput]],
     ):
         assert encoder_lens is None, "Not supported"
 
@@ -310,7 +310,7 @@ class TritonAttnBackend(AttentionBackend):
         seq_lens_sum: int,
         encoder_lens: Optional[torch.Tensor],
         forward_mode: ForwardMode,
-        spec_info: Optional[SpecInfo],
+        spec_info: Optional[Union[EagleDraftInput, EagleVerifyInput]],
     ):
         # NOTE: encoder_lens expected to be zeros or None
         if forward_mode.is_decode_or_idle():