feat(misc): Profiler support

use --enable_profiling=MODE to enable, currently support torch_profile and nvtx (use with NVIDIA Nsight system) mode

Author: WuSiYu

lightllm/server/api_cli.py

@@ -572,4 +572,19 @@ def make_argument_parser() -> argparse.ArgumentParser:
         default=False,
         help="""Enable prefix prompt cache fetch for data parallel inference, disabled by default.""",
     )
+    parser.add_argument(
+        "--enable_profiling",
+        type=str,
+        choices=["torch_profiler", "nvtx"],
+        default=None,
+        help="""Enable profiler support.
+                This will expose '/profiler_start' and '/profiler_stop' API,
+                below profiling features will only be enabled in this range.
+                Options:
+                'torch_profiler': will setup torch.profiler.profile(), trace files will be saved to './trace',
+                or set by 'LIGHTLLM_TRACE_DIR' env;
+                'nvtx': will add NVTX marks for external profiler like NVIDIA Nsight System
+                (you should set it up by yourself).
+                A NVTX range named 'LIGHTLLM_PROFILE' will be added within the profiling range."""
+    )
     return parser

lightllm/server/api_http.py

@@ -335,6 +335,24 @@ async def kv_move_status(websocket: WebSocket):
     return
 
 
+@app.get("/profiler_start")
+async def profiler_start() -> Response:
+    if g_objs.args.enable_profiling:
+        await g_objs.httpserver_manager.profiler_cmd("start")
+        return JSONResponse({"status": "ok"})
+    else:
+        return JSONResponse({"message": "Profiling support not enabled"}, status_code=400)
+
+
+@app.get("/profiler_stop")
+async def profiler_stop() -> Response:
+    if g_objs.args.enable_profiling:
+        await g_objs.httpserver_manager.profiler_cmd("stop")
+        return JSONResponse({"status": "ok"})
+    else:
+        return JSONResponse({"message": "Profiling support not enabled"}, status_code=400)
+
+
 @app.on_event("shutdown")
 async def shutdown():
     logger.info("Received signal to shutdown. Performing graceful shutdown...")

lightllm/server/httpserver/manager.py

@@ -13,7 +13,7 @@
 from frozendict import frozendict
 
 asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
-from typing import Union, List, Tuple, Dict, Optional, AsyncGenerator
+from typing import Literal, Union, List, Tuple, Dict, Optional, AsyncGenerator
 from websockets import ClientConnection
 from fastapi import Request
 from ..tokenizer import get_tokenizer
@@ -35,6 +35,7 @@
 from lightllm.utils.config_utils import get_vocab_size
 from lightllm.utils.envs_utils import get_unique_server_name
 from lightllm.utils.error_utils import NixlPrefillNodeStopGenToken
+from lightllm.utils.profiler import ProfilerCmd
 from rpyc.utils.classic import obtain
 
 logger = init_logger(__name__)
@@ -650,6 +651,16 @@ async def abort(self, group_req_id: int) -> bool:
         logger.warning(f"aborted group_request_id {group_req_objs.group_req_id}")
         return True
 
+    async def profiler_cmd(self, cmd: Literal["start", "stop"]):
+        receivers = [self.send_to_router]
+        if self.pd_mode.is_P_or_NORMAL() and self.enable_multimodal:
+            receivers.append(self.send_to_visual)
+        for receiver in receivers:
+            receiver.send_pyobj(
+                ProfilerCmd(cmd),
+                protocol=pickle.HIGHEST_PROTOCOL,
+            )
+
     async def recycle_resource_loop(self):
         pre_time_mark = time.time()
 

lightllm/server/router/manager.py

@@ -26,6 +26,7 @@
 from lightllm.server.multi_level_kv_cache.cpu_cache_client import CpuKvCacheClient
 from lightllm.server.core.objs.shm_objs_io_buffer import ShmObjsIOBuffer
 from lightllm.utils.log_utils import init_logger, log_time_ready
+from lightllm.utils.profiler import ProcessProfiler, ProfilerCmd
 from lightllm.server.router.token_load import TokenLoad
 from lightllm.server.metrics.manager import MetricClient
 from lightllm.common.basemodel.infer_lock import g_router_lock
@@ -106,6 +107,9 @@ def __init__(self, args: StartArgs):
             if not self.args.enable_cpu_cache
             else CpuKvCacheClient(only_create_meta_data=True, init_shm_data=False)
         )
+
+        profiler_mode = args.enable_profiling
+        self.profiler = ProcessProfiler(mode=profiler_mode, name="lightllm-router") if profiler_mode else None
         return
 
     async def wait_to_model_ready(self):
@@ -504,16 +508,28 @@ def _multinode_tp_generate_new_batch(self):
             raise e
         return
 
+    async def _profiler_cmd(self, cmd_obj: ProfilerCmd):
+        self.profiler.cmd(cmd_obj)
+
+        cmd = ProfilerCmd(cmd=cmd_obj.cmd)
+        while not self.shm_reqs_io_buffer.is_empty():
+            await asyncio.sleep(0.02)
+
+        self.shm_reqs_io_buffer.write_obj([cmd])
+        self.shm_reqs_io_buffer.set_ready()
+
     async def _recv_new_reqs_and_schedule(self):
         if not hasattr(self, "recv_max_count"):
             self.recv_max_count = 64
 
         try:
             # 一次最多从 zmq 中取 recv_max_count 个请求，防止 zmq 队列中请求数量过多导致阻塞了主循环。
             for _ in range(self.recv_max_count):
-                recv_req: GroupReqIndexes = self.zmq_recv_socket.recv_pyobj(zmq.NOBLOCK)
+                recv_req: Union[GroupReqIndexes, ProfilerCmd] = self.zmq_recv_socket.recv_pyobj(zmq.NOBLOCK)
                 if isinstance(recv_req, GroupReqIndexes):
                     self._add_req(recv_req)
+                elif isinstance(recv_req, ProfilerCmd):
+                    await self._profiler_cmd(recv_req)
                 else:
                     assert False, f"Error Req Inf {recv_req}"
 

lightllm/server/router/model_infer/mode_backend/base_backend.py

@@ -39,6 +39,7 @@
 from lightllm.common.basemodel.triton_kernel.gather_token_id import scatter_token
 from lightllm.server.pd_io_struct import NIXLChunckedTransTaskRet
 from .multi_level_kv_cache import MultiLevelKvCacheModule
+from lightllm.utils.profiler import ProcessProfiler, ProfilerCmd
 
 
 class ModeBackend:
@@ -231,6 +232,10 @@ def init_model(self, kvargs):
         if self.args.mtp_mode:
             self.init_mtp_draft_model(kvargs)
 
+        prof_name = f"lightllm-model_backend-node{self.node_rank}_dev{get_current_device_id()}"
+        prof_mode = self.args.enable_profiling
+        self.profiler = ProcessProfiler(mode=prof_mode, name=prof_name, use_multi_thread=True) if prof_mode else None
+
         # 启动infer_loop_thread, 启动两个线程进行推理，对于具备双batch推理折叠得场景
         # 可以降低 cpu overhead，大幅提升gpu得使用率。
         self.infer_loop_thread = threading.Thread(target=self.infer_loop, daemon=True)
@@ -343,6 +348,10 @@ def _try_read_new_reqs(self):
             self._try_read_new_reqs_multinode_tp()
         else:
             self._try_read_new_reqs_normal()
+
+        # on each loop thread
+        if self.profiler is not None:
+            self.profiler.multi_thread_helper()
         return
 
     def _try_read_new_reqs_normal(self):
@@ -408,6 +417,8 @@ def _read_reqs_buffer_and_init_reqs(self):
                     if obj.req_id in g_infer_context.requests_mapping:
                         req: InferReq = g_infer_context.requests_mapping[obj.req_id]
                         req.infer_aborted = True
+                elif isinstance(obj, ProfilerCmd):
+                    self.profiler.cmd(obj)
                 else:
                     assert False, f"error type {type(obj)}"
             if init_reqs:

lightllm/server/visualserver/manager.py

@@ -7,7 +7,7 @@
 import pickle
 import inspect
 import setproctitle
-from typing import List
+from typing import List, Union
 from lightllm.server.core.objs.io_objs.group_req import GroupReqIndexes
 from lightllm.server.core.objs import ShmReqManager, StartArgs
 
@@ -18,6 +18,7 @@
 from lightllm.utils.graceful_utils import graceful_registry
 from lightllm.utils.process_check import start_parent_check_thread
 from lightllm.utils.envs_utils import get_unique_server_name
+from lightllm.utils.profiler import ProcessProfiler, ProfilerCmd
 from rpyc.utils.classic import obtain
 
 
@@ -59,6 +60,8 @@ def __init__(
         self.visual_model_rpc_ports = visual_model_rpc_ports
         self.send_batch_size = args.visual_send_batch_size
         self.shm_req_manager = ShmReqManager()
+        prof_mode = args.enable_profiling
+        self.profiler = ProcessProfiler(prof_mode, name="lightllm-visual_server") if prof_mode else None
 
     async def wait_to_model_ready(self):
 
@@ -185,9 +188,17 @@ async def loop_for_netio_req(self):
         while True:
             try:
                 for _ in range(self.visual_recv_max_count):
-                    recv_req: GroupReqIndexes = self.zmq_recv_socket.recv_pyobj(zmq.NOBLOCK)
+                    recv_req: GroupReqIndexes | ProfilerCmd = self.zmq_recv_socket.recv_pyobj(zmq.NOBLOCK)
                     if isinstance(recv_req, GroupReqIndexes):
                         self.waiting_reqs.append(recv_req)
+                    elif isinstance(recv_req, ProfilerCmd):
+                        self.profiler.cmd(recv_req)
+                        tasks = []
+                        for dp in range(self.vit_dp):
+                            for tp in range(self.vit_tp):
+                                task = asyncio.create_task(self.model_rpcs[dp][tp].profiler_cmd(recv_req))
+                                tasks.append(task)
+                        await asyncio.gather(*tasks)
                     else:
                         assert False, f"Error Req Inf {recv_req}"
                 self.visual_recv_max_count = min(self.visual_recv_max_count * 1.3, 256)

lightllm/server/visualserver/model_infer/model_rpc.py

@@ -24,6 +24,7 @@
 from lightllm.utils.dist_utils import init_vision_distributed_env
 from lightllm.utils.graceful_utils import graceful_registry
 from lightllm.utils.envs_utils import get_env_start_args
+from lightllm.utils.profiler import ProcessProfiler
 
 
 class VisualModelRpcServer(rpyc.Service):
@@ -43,6 +44,9 @@ def exposed_init_model(self, kvargs):
         self.cache_client._channel.stream.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
         self.data_type = kvargs["data_type"]
 
+        prof_mode = get_env_start_args().enable_profiling
+        prof_name = f"lightllm-visual-vit_dp{self.dp_rank_id}_tp{self.tp_rank_id}"
+        self.profiler = ProcessProfiler(mode=prof_mode, name=prof_name) if prof_mode else None
         init_vision_distributed_env(kvargs)
         model_cfg, _ = PretrainedConfig.get_config_dict(weight_dir)
 
@@ -116,6 +120,10 @@ def exposed_encode(self, images: List[ImageItem]):
                 self.cache_client.root.set_items_embed(ids_to_set)
         return
 
+    def exposed_profiler_cmd(self, cmd_obj):
+        cmd_obj = obtain(cmd_obj)
+        self.profiler.cmd(cmd_obj)
+
 
 class VisualModelRpcClient:
     def __init__(self, model_rpc, vit_tp, rpc_server_process=None):
@@ -138,9 +146,11 @@ async def _func(*args, **kwargs):
 
             self._init_model = async_wrap(self.model.init_model)
             self._encode = async_wrap(self.model.encode)
+            self._profiler_cmd = async_wrap(self.model.profiler_cmd)
         else:
             self._init_model = self.model.exposed_init_model
             self._encode = self.model.exposed_encode
+            self._profiler_cmd = self.model.exposed_profiler_cmd
         return
 
     async def init_model(self, kvargs):
@@ -158,6 +168,14 @@ async def encode(self, images: List[ImageItem]):
         else:
             return ans
 
+    async def profiler_cmd(self, cmd_obj):
+        ans: rpyc.AsyncResult = self._profiler_cmd(cmd_obj)
+        if self.use_rpc:
+            await ans
+            return
+        else:
+            return
+
 
 def _init_env(port, device_id):
     # 注册graceful 退出的处理