update py-serving to pipeline-serving

python/CMakeLists.txt

@@ -7,8 +7,10 @@ endif()
 
 if (SERVER)
     if (NOT WITH_GPU)
+        file(INSTALL pipeline DESTINATION paddle_serving_server)
         file(GLOB_RECURSE SERVING_SERVER_PY_FILES paddle_serving_server/*.py)
     else()
+        file(INSTALL pipeline DESTINATION paddle_serving_server_gpu)
         file(GLOB_RECURSE SERVING_SERVER_PY_FILES paddle_serving_server_gpu/*.py)
     endif()
         set(PY_FILES ${SERVING_SERVER_PY_FILES})

python/examples/pipeline/imdb_model_ensemble/get_data.sh

+wget --no-check-certificate https://fleet.bj.bcebos.com/text_classification_data.tar.gz
+wget --no-check-certificate https://paddle-serving.bj.bcebos.com/imdb-demo/imdb_model.tar.gz
+tar -zxvf text_classification_data.tar.gz
+tar -zxvf imdb_model.tar.gz

python/examples/imdb/test_py_client.py → python/examples/pipeline/imdb_model_ensemble/test_pipeline_client.py

@@ -11,12 +11,12 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from paddle_serving_client.pyclient import PyClient
+from paddle_serving_client.pipeline import PipelineClient
 import numpy as np
 from paddle_serving_app.reader import IMDBDataset
 from line_profiler import LineProfiler
 
-client = PyClient()
+client = PipelineClient()
 client.connect('localhost:8080')
 
 lp = LineProfiler()

python/examples/imdb/test_py_server.py → python/examples/pipeline/imdb_model_ensemble/test_pipeline_server.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 # pylint: disable=doc-string-missing
 
-from paddle_serving_server.pyserver import Op
-from paddle_serving_server.pyserver import PyServer
+from paddle_serving_server.pipeline import Op
+from paddle_serving_server.pipeline import PipelineServer
 import numpy as np
 import logging
 
@@ -62,7 +62,7 @@ cnn_op = Op(name="cnn",
 combine_op = CombineOp(
     name="combine", inputs=[bow_op, cnn_op], concurrency=1, timeout=-1, retry=1)
 
-pyserver = PyServer(
+pyserver = PipelineServer(
     use_multithread=True,
     client_type='grpc',
     use_future=False,

python/paddle_serving_client/pyclient.py → python/paddle_serving_client/pipeline.py

@@ -18,7 +18,7 @@ from .proto import general_python_service_pb2_grpc
 import numpy as np
 
 
-class PyClient(object):
+class PipelineClient(object):
     def __init__(self):
         self._channel = None
 

python/pipeline/__init__.py

+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from operator import Op
+from pipeline_server import PipelineServer

python/pipeline/operator.py

@@ -12,3 +12,391 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # pylint: disable=doc-string-missing
+import threading
+import multiprocessing
+from paddle_serving_client import MultiLangClient, Client
+from concurrent import futures
+import logging
+import func_timeout
+
+from .channel import ThreadChannel, ProcessChannel, ChannelDataEcode, ChannelData, ChannelDataType
+
+
+class Op(object):
+    def __init__(self,
+                 name,
+                 inputs,
+                 server_model=None,
+                 server_port=None,
+                 device=None,
+                 client_config=None,
+                 server_name=None,
+                 fetch_names=None,
+                 concurrency=1,
+                 timeout=-1,
+                 retry=2):
+        self._is_run = False
+        self.name = name  # to identify the type of OP, it must be globally unique
+        self._concurrency = concurrency  # amount of concurrency
+        self.set_input_ops(inputs)
+        self.with_serving = False
+        self._client_config = client_config
+        self._server_name = server_name
+        self._fetch_names = fetch_names
+        self._server_model = server_model
+        self._server_port = server_port
+        self._device = device
+        if self._client_config is not None and \
+                self._server_name is not None and \
+                self._fetch_names is not None:
+            self.with_serving = True
+        self._timeout = timeout
+        self._retry = max(1, retry)
+        self._input = None
+        self._outputs = []
+        self._profiler = None
+
+    def init_profiler(self, profiler):
+        self._profiler = profiler
+
+    def _profiler_record(self, string):
+        if self._profiler is None:
+            return
+        self._profiler.record(string)
+
+    def init_client(self, client_type, client_config, server_name, fetch_names):
+        if self.with_serving == False:
+            logging.debug("{} no client".format(self.name))
+            return
+        logging.debug("{} client_config: {}".format(self.name, client_config))
+        logging.debug("{} server_name: {}".format(self.name, server_name))
+        logging.debug("{} fetch_names: {}".format(self.name, fetch_names))
+        if client_type == 'brpc':
+            self._client = Client()
+        elif client_type == 'grpc':
+            self._client = MultiLangClient()
+        else:
+            raise ValueError("unknow client type: {}".format(client_type))
+        self._client.load_client_config(client_config)
+        self._client.connect([server_name])
+        self._fetch_names = fetch_names
+
+    def get_input_channel(self):
+        return self._input
+
+    def get_input_ops(self):
+        return self._input_ops
+
+    def set_input_ops(self, ops):
+        if not isinstance(ops, list):
+            ops = [] if ops is None else [ops]
+        self._input_ops = []
+        for op in ops:
+            if not isinstance(op, Op):
+                raise TypeError(
+                    self._log('input op must be Op type, not {}'.format(
+                        type(op))))
+            self._input_ops.append(op)
+
+    def add_input_channel(self, channel):
+        if not isinstance(channel, (ThreadChannel, ProcessChannel)):
+            raise TypeError(
+                self._log('input channel must be Channel type, not {}'.format(
+                    type(channel))))
+        channel.add_consumer(self.name)
+        self._input = channel
+
+    def get_output_channels(self):
+        return self._outputs
+
+    def add_output_channel(self, channel):
+        if not isinstance(channel, (ThreadChannel, ProcessChannel)):
+            raise TypeError(
+                self._log('output channel must be Channel type, not {}'.format(
+                    type(channel))))
+        channel.add_producer(self.name)
+        self._outputs.append(channel)
+
+    def preprocess(self, channeldata):
+        if isinstance(channeldata, dict):
+            raise NotImplementedError(
+                'this Op has multiple previous inputs. Please override this method'
+            )
+        feed = channeldata.parse()
+        return feed
+
+    def midprocess(self, data, use_future=True):
+        if not isinstance(data, dict):
+            raise Exception(
+                self._log(
+                    'data must be dict type(the output of preprocess()), but get {}'.
+                    format(type(data))))
+        logging.debug(self._log('data: {}'.format(data)))
+        logging.debug(self._log('fetch: {}'.format(self._fetch_names)))
+        if isinstance(self._client, MultiLangClient):
+            call_result = self._client.predict(
+                feed=data, fetch=self._fetch_names, asyn=use_future)
+        else:
+            call_result = self._client.predict(
+                feed=data, fetch=self._fetch_names)
+        logging.debug(self._log("get call_result"))
+        return call_result
+
+    def postprocess(self, output_data):
+        return output_data
+
+    def stop(self):
+        self._input.stop()
+        for channel in self._outputs:
+            channel.stop()
+        self._is_run = False
+
+    def _parse_channeldata(self, channeldata):
+        data_id, error_channeldata = None, None
+        if isinstance(channeldata, dict):
+            parsed_data = {}
+            key = list(channeldata.keys())[0]
+            data_id = channeldata[key].id
+            for _, data in channeldata.items():
+                if data.ecode != ChannelDataEcode.OK.value:
+                    error_channeldata = data
+                    break
+        else:
+            data_id = channeldata.id
+            if channeldata.ecode != ChannelDataEcode.OK.value:
+                error_channeldata = channeldata
+        return data_id, error_channeldata
+
+    def _push_to_output_channels(self, data, channels, name=None):
+        if name is None:
+            name = self.name
+        for channel in channels:
+            channel.push(data, name)
+
+    def start_with_process(self, client_type, use_future):
+        proces = []
+        for concurrency_idx in range(self._concurrency):
+            p = multiprocessing.Process(
+                target=self._run,
+                args=(concurrency_idx, self.get_input_channel(),
+                      self.get_output_channels(), client_type, use_future))
+            p.start()
+            proces.append(p)
+        return proces
+
+    def start_with_thread(self, client_type, use_future):
+        threads = []
+        for concurrency_idx in range(self._concurrency):
+            t = threading.Thread(
+                target=self._run,
+                args=(concurrency_idx, self.get_input_channel(),
+                      self.get_output_channels(), client_type, use_future))
+            t.start()
+            threads.append(t)
+        return threads
+
+    def _run(self, concurrency_idx, input_channel, output_channels, client_type,
+             use_future):
+        # create client based on client_type
+        self.init_client(client_type, self._client_config, self._server_name,
+                         self._fetch_names)
+        op_info_prefix = "[{}|{}]".format(self.name, concurrency_idx)
+        log = self._get_log_func(op_info_prefix)
+        self._is_run = True
+        while self._is_run:
+            self._profiler_record("{}-get_0".format(op_info_prefix))
+            channeldata = input_channel.front(self.name)
+            self._profiler_record("{}-get_1".format(op_info_prefix))
+            logging.debug(log("input_data: {}".format(channeldata)))
+
+            data_id, error_channeldata = self._parse_channeldata(channeldata)
+
+            # error data in predecessor Op
+            if error_channeldata is not None:
+                self._push_to_output_channels(error_channeldata,
+                                              output_channels)
+                continue
+
+            # preprecess
+            try:
+                self._profiler_record("{}-prep_0".format(op_info_prefix))
+                preped_data = self.preprocess(channeldata)
+                self._profiler_record("{}-prep_1".format(op_info_prefix))
+            except NotImplementedError as e:
+                # preprocess function not implemented
+                error_info = log(e)
+                logging.error(error_info)
+                self._push_to_output_channels(
+                    ChannelData(
+                        ecode=ChannelDataEcode.NOT_IMPLEMENTED.value,
+                        error_info=error_info,
+                        data_id=data_id),
+                    output_channels)
+                continue
+            except TypeError as e:
+                # Error type in channeldata.datatype
+                error_info = log(e)
+                logging.error(error_info)
+                self._push_to_output_channels(
+                    ChannelData(
+                        ecode=ChannelDataEcode.TYPE_ERROR.value,
+                        error_info=error_info,
+                        data_id=data_id),
+                    output_channels)
+                continue
+            except Exception as e:
+                error_info = log(e)
+                logging.error(error_info)
+                self._push_to_output_channels(
+                    ChannelData(
+                        ecode=ChannelDataEcode.UNKNOW.value,
+                        error_info=error_info,
+                        data_id=data_id),
+                    output_channels)
+                continue
+
+            # midprocess
+            midped_data = None
+            if self.with_serving:
+                ecode = ChannelDataEcode.OK.value
+                self._profiler_record("{}-midp_0".format(op_info_prefix))
+                if self._timeout <= 0:
+                    try:
+                        midped_data = self.midprocess(preped_data, use_future)
+                    except Exception as e:
+                        ecode = ChannelDataEcode.UNKNOW.value
+                        error_info = log(e)
+                        logging.error(error_info)
+                else:
+                    for i in range(self._retry):
+                        try:
+                            midped_data = func_timeout.func_timeout(
+                                self._timeout,
+                                self.midprocess,
+                                args=(preped_data, use_future))
+                        except func_timeout.FunctionTimedOut as e:
+                            if i + 1 >= self._retry:
+                                ecode = ChannelDataEcode.TIMEOUT.value
+                                error_info = log(e)
+                                logging.error(error_info)
+                            else:
+                                logging.warn(
+                                    log("timeout, retry({})".format(i + 1)))
+                        except Exception as e:
+                            ecode = ChannelDataEcode.UNKNOW.value
+                            error_info = log(e)
+                            logging.error(error_info)
+                            break
+                        else:
+                            break
+                if ecode != ChannelDataEcode.OK.value:
+                    self._push_to_output_channels(
+                        ChannelData(
+                            ecode=ecode, error_info=error_info,
+                            data_id=data_id),
+                        output_channels)
+                    continue
+                self._profiler_record("{}-midp_1".format(op_info_prefix))
+            else:
+                midped_data = preped_data
+
+            # postprocess
+            output_data = None
+            self._profiler_record("{}-postp_0".format(op_info_prefix))
+            if self.with_serving and client_type == 'grpc' and use_future:
+                # use call_future
+                output_data = ChannelData(
+                    datatype=ChannelDataType.CHANNEL_FUTURE.value,
+                    future=midped_data,
+                    data_id=data_id,
+                    callback_func=self.postprocess)
+            else:
+                try:
+                    postped_data = self.postprocess(midped_data)
+                except Exception as e:
+                    ecode = ChannelDataEcode.UNKNOW.value
+                    error_info = log(e)
+                    logging.error(error_info)
+                    self._push_to_output_channels(
+                        ChannelData(
+                            ecode=ecode, error_info=error_info,
+                            data_id=data_id),
+                        output_channels)
+                    continue
+                if not isinstance(postped_data, dict):
+                    ecode = ChannelDataEcode.TYPE_ERROR.value
+                    error_info = log("output of postprocess funticon must be " \
+                            "dict type, but get {}".format(type(postped_data)))
+                    logging.error(error_info)
+                    self._push_to_output_channels(
+                        ChannelData(
+                            ecode=ecode, error_info=error_info,
+                            data_id=data_id),
+                        output_channels)
+                    continue
+
+                output_data = ChannelData(
+                    ChannelDataType.CHANNEL_NPDATA.value,
+                    npdata=postped_data,
+                    data_id=data_id)
+            self._profiler_record("{}-postp_1".format(op_info_prefix))
+
+            # push data to channel (if run succ)
+            self._profiler_record("{}-push_0".format(op_info_prefix))
+            self._push_to_output_channels(output_data, output_channels)
+            self._profiler_record("{}-push_1".format(op_info_prefix))
+
+    def _log(self, info):
+        return "{} {}".format(self.name, info)
+
+    def _get_log_func(self, op_info_prefix):
+        def log_func(info_str):
+            return "{} {}".format(op_info_prefix, info_str)
+
+        return log_func
+
+    def get_concurrency(self):
+        return self._concurrency
+
+
+class VirtualOp(Op):
+    ''' For connecting two channels. '''
+
+    def __init__(self, name, concurrency=1):
+        super(VirtualOp, self).__init__(
+            name=name, inputs=None, concurrency=concurrency)
+        self._virtual_pred_ops = []
+
+    def add_virtual_pred_op(self, op):
+        self._virtual_pred_ops.append(op)
+
+    def add_output_channel(self, channel):
+        if not isinstance(channel, (ThreadChannel, ProcessChannel)):
+            raise TypeError(
+                self._log('output channel must be Channel type, not {}'.format(
+                    type(channel))))
+        for op in self._virtual_pred_ops:
+            channel.add_producer(op.name)
+        self._outputs.append(channel)
+
+    def _run(self, concurrency_idx, input_channel, output_channels, client_type,
+             use_future):
+        op_info_prefix = "[{}|{}]".format(self.name, concurrency_idx)
+        log = self._get_log_func(op_info_prefix)
+        self._is_run = True
+        while self._is_run:
+            self._profiler_record("{}-get_0".format(op_info_prefix))
+            channeldata = input_channel.front(self.name)
+            self._profiler_record("{}-get_1".format(op_info_prefix))
+
+            self._profiler_record("{}-push_0".format(op_info_prefix))
+            if isinstance(channeldata, dict):
+                for name, data in channeldata.items():
+                    self._push_to_output_channels(
+                        data, channels=output_channels, name=name)
+            else:
+                self._push_to_output_channels(
+                    channeldata,
+                    channels=output_channels,
+                    name=self._virtual_pred_ops[0].name)
+            self._profiler_record("{}-push_1".format(op_info_prefix))

python/pipeline/pipeline_server.py

@@ -12,3 +12,467 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # pylint: disable=doc-string-missing
+import threading
+import multiprocessing
+import multiprocessing.queues
+import sys
+if sys.version_info.major == 2:
+    import Queue
+elif sys.version_info.major == 3:
+    import queue as Queue
+else:
+    raise Exception("Error Python version")
+import os
+from paddle_serving_client import MultiLangClient, Client
+from concurrent import futures
+import numpy as np
+import grpc
+from ..proto import general_python_service_pb2 as pyservice_pb2
+from ..proto import pyserving_channel_pb2 as channel_pb2
+from ..proto import general_python_service_pb2_grpc
+import logging
+import random
+import time
+import func_timeout
+import enum
+import collections
+import copy
+
+from .operator import Op, VirtualOp
+from .channel import ThreadChannel, ProcessChannel, ChannelData, ChannelDataEcode, ChannelDataType
+from .profiler import TimeProfiler
+
+_profiler = TimeProfiler()
+
+
+class GeneralPythonService(
+        general_python_service_pb2_grpc.GeneralPythonServiceServicer):
+    def __init__(self, in_channel, out_channel, retry=2):
+        super(GeneralPythonService, self).__init__()
+        self.name = "#G"
+        self.set_in_channel(in_channel)
+        self.set_out_channel(out_channel)
+        logging.debug(self._log(in_channel.debug()))
+        logging.debug(self._log(out_channel.debug()))
+        #TODO: 
+        #  multi-lock for different clients
+        #  diffenert lock for server and client
+        self._id_lock = threading.Lock()
+        self._cv = threading.Condition()
+        self._globel_resp_dict = {}
+        self._id_counter = 0
+        self._retry = retry
+        self._recive_func = threading.Thread(
+            target=GeneralPythonService._recive_out_channel_func, args=(self, ))
+        self._recive_func.start()
+
+    def _log(self, info_str):
+        return "[{}] {}".format(self.name, info_str)
+
+    def set_in_channel(self, in_channel):
+        if not isinstance(in_channel, (ThreadChannel, ProcessChannel)):
+            raise TypeError(
+                self._log('in_channel must be Channel type, but get {}'.format(
+                    type(in_channel))))
+        in_channel.add_producer(self.name)
+        self._in_channel = in_channel
+
+    def set_out_channel(self, out_channel):
+        if not isinstance(out_channel, (ThreadChannel, ProcessChannel)):
+            raise TypeError(
+                self._log('out_channel must be Channel type, but get {}'.format(
+                    type(out_channel))))
+        out_channel.add_consumer(self.name)
+        self._out_channel = out_channel
+
+    def _recive_out_channel_func(self):
+        while True:
+            channeldata = self._out_channel.front(self.name)
+            if not isinstance(channeldata, ChannelData):
+                raise TypeError(
+                    self._log('data must be ChannelData type, but get {}'.
+                              format(type(channeldata))))
+            with self._cv:
+                data_id = channeldata.id
+                self._globel_resp_dict[data_id] = channeldata
+                self._cv.notify_all()
+
+    def _get_next_id(self):
+        with self._id_lock:
+            self._id_counter += 1
+            return self._id_counter - 1
+
+    def _get_data_in_globel_resp_dict(self, data_id):
+        resp = None
+        with self._cv:
+            while data_id not in self._globel_resp_dict:
+                self._cv.wait()
+            resp = self._globel_resp_dict.pop(data_id)
+            self._cv.notify_all()
+        return resp
+
+    def _pack_data_for_infer(self, request):
+        logging.debug(self._log('start inferce'))
+        data_id = self._get_next_id()
+        npdata = {}
+        try:
+            for idx, name in enumerate(request.feed_var_names):
+                logging.debug(
+                    self._log('name: {}'.format(request.feed_var_names[idx])))
+                logging.debug(
+                    self._log('data: {}'.format(request.feed_insts[idx])))
+                npdata[name] = np.frombuffer(
+                    request.feed_insts[idx], dtype=request.type[idx])
+                npdata[name].shape = np.frombuffer(
+                    request.shape[idx], dtype="int32")
+        except Exception as e:
+            return ChannelData(
+                ecode=ChannelDataEcode.RPC_PACKAGE_ERROR.value,
+                error_info="rpc package error",
+                data_id=data_id), data_id
+        else:
+            return ChannelData(
+                datatype=ChannelDataType.CHANNEL_NPDATA.value,
+                npdata=npdata,
+                data_id=data_id), data_id
+
+    def _pack_data_for_resp(self, channeldata):
+        logging.debug(self._log('get channeldata'))
+        resp = pyservice_pb2.Response()
+        resp.ecode = channeldata.ecode
+        if resp.ecode == ChannelDataEcode.OK.value:
+            if channeldata.datatype == ChannelDataType.CHANNEL_PBDATA.value:
+                for inst in channeldata.pbdata.insts:
+                    resp.fetch_insts.append(inst.data)
+                    resp.fetch_var_names.append(inst.name)
+                    resp.shape.append(inst.shape)
+                    resp.type.append(inst.type)
+            elif channeldata.datatype in (ChannelDataType.CHANNEL_FUTURE.value,
+                                          ChannelDataType.CHANNEL_NPDATA.value):
+                feed = channeldata.parse()
+                for name, var in feed.items():
+                    resp.fetch_insts.append(var.tobytes())
+                    resp.fetch_var_names.append(name)
+                    resp.shape.append(
+                        np.array(
+                            var.shape, dtype="int32").tobytes())
+                    resp.type.append(str(var.dtype))
+            else:
+                raise TypeError(
+                    self._log("Error type({}) in datatype.".format(
+                        channeldata.datatype)))
+        else:
+            resp.error_info = channeldata.error_info
+        return resp
+
+    def inference(self, request, context):
+        _profiler.record("{}-prepack_0".format(self.name))
+        data, data_id = self._pack_data_for_infer(request)
+        _profiler.record("{}-prepack_1".format(self.name))
+
+        resp_channeldata = None
+        for i in range(self._retry):
+            logging.debug(self._log('push data'))
+            _profiler.record("{}-push_0".format(self.name))
+            self._in_channel.push(data, self.name)
+            _profiler.record("{}-push_1".format(self.name))
+
+            logging.debug(self._log('wait for infer'))
+            _profiler.record("{}-fetch_0".format(self.name))
+            resp_channeldata = self._get_data_in_globel_resp_dict(data_id)
+            _profiler.record("{}-fetch_1".format(self.name))
+
+            if resp_channeldata.ecode == ChannelDataEcode.OK.value:
+                break
+            if i + 1 < self._retry:
+                logging.warn("retry({}): {}".format(
+                    i + 1, resp_channeldata.error_info))
+
+        _profiler.record("{}-postpack_0".format(self.name))
+        resp = self._pack_data_for_resp(resp_channeldata)
+        _profiler.record("{}-postpack_1".format(self.name))
+        _profiler.print_profile()
+        return resp
+
+
+class PipelineServer(object):
+    def __init__(self,
+                 use_multithread=True,
+                 client_type='brpc',
+                 use_future=False,
+                 retry=2,
+                 profile=False):
+        self._channels = []
+        self._user_ops = []
+        self._actual_ops = []
+        self._port = None
+        self._worker_num = None
+        self._in_channel = None
+        self._out_channel = None
+        self._retry = retry
+        self._use_multithread = use_multithread
+        self._client_type = client_type
+        self._use_future = use_future
+        if not self._use_multithread:
+            self._manager = multiprocessing.Manager()
+            if profile:
+                raise Exception(
+                    "profile cannot be used in multiprocess version temporarily")
+            if self._use_future:
+                raise Exception("cannot use future in multiprocess")
+        if self._client_type == 'brpc' and self._use_future:
+            logging.warn("brpc impl cannot use future")
+        _profiler.enable(profile)
+
+    def add_channel(self, channel):
+        self._channels.append(channel)
+
+    def add_op(self, op):
+        self._user_ops.append(op)
+
+    def add_ops(self, ops):
+        self._user_ops.extend(ops)
+
+    def gen_desc(self):
+        logging.info('here will generate desc for PAAS')
+        pass
+
+    def _topo_sort(self):
+        indeg_num = {}
+        que_idx = 0  # scroll queue 
+        ques = [Queue.Queue() for _ in range(2)]
+        for op in self._user_ops:
+            if len(op.get_input_ops()) == 0:
+                op.name = "#G"  # update read_op.name
+                break
+        outdegs = {op.name: [] for op in self._user_ops}
+        zero_indeg_num, zero_outdeg_num = 0, 0
+        for idx, op in enumerate(self._user_ops):
+            # check the name of op is globally unique
+            if op.name in indeg_num:
+                raise Exception("the name of Op must be unique")
+            indeg_num[op.name] = len(op.get_input_ops())
+            if indeg_num[op.name] == 0:
+                ques[que_idx].put(op)
+                zero_indeg_num += 1
+            for pred_op in op.get_input_ops():
+                outdegs[pred_op.name].append(op)
+        if zero_indeg_num != 1:
+            raise Exception("DAG contains multiple input Ops")
+        for _, succ_list in outdegs.items():
+            if len(succ_list) == 0:
+                zero_outdeg_num += 1
+        if zero_outdeg_num != 1:
+            raise Exception("DAG contains multiple output Ops")
+
+        # topo sort to get dag_views
+        dag_views = []
+        sorted_op_num = 0
+        while True:
+            que = ques[que_idx]
+            next_que = ques[(que_idx + 1) % 2]
+            dag_view = []
+            while que.qsize() != 0:
+                op = que.get()
+                dag_view.append(op)
+                sorted_op_num += 1
+                for succ_op in outdegs[op.name]:
+                    indeg_num[succ_op.name] -= 1
+                    if indeg_num[succ_op.name] == 0:
+                        next_que.put(succ_op)
+            dag_views.append(dag_view)
+            if next_que.qsize() == 0:
+                break
+            que_idx = (que_idx + 1) % 2
+        if sorted_op_num < len(self._user_ops):
+            raise Exception("not legal DAG")
+
+        # create channels and virtual ops
+        def name_generator(prefix):
+            def number_generator():
+                idx = 0
+                while True:
+                    yield "{}{}".format(prefix, idx)
+                    idx += 1
+
+            return number_generator()
+
+        def gen_channel(name_gen):
+            channel = None
+            if self._use_multithread:
+                if sys.version_info.major == 2:
+                    channel = ThreadChannel(name=name_gen.next())
+                elif sys.version_info.major == 3:
+                    channel = ThreadChannel(name=name_gen.__next__())
+                else:
+                    raise Exception("Error Python version")
+            else:
+                if sys.version_info.major == 2:
+                    channel = ProcessChannel(
+                        self._manager, name=name_gen.next())
+                elif sys.version_info.major == 3:
+                    channel = ProcessChannel(
+                        self._manager, name=name_gen.__next__())
+                else:
+                    raise Exception("Error Python version")
+            return channel
+
+        def gen_virtual_op(name_gen):
+            virtual_op = None
+            if sys.version_info.major == 2:
+                virtual_op = VirtualOp(name=name_gen.next())
+            elif sys.version_info.major == 3:
+                virtual_op = VirtualOp(name=op_name_gen.__next__())
+            else:
+                raise Exception("Error Python version")
+            return virtual_op
+
+        virtual_op_name_gen = name_generator("vir")
+        channel_name_gen = name_generator("chl")
+        virtual_ops = []
+        channels = []
+        input_channel = None
+        actual_view = None
+        for v_idx, view in enumerate(dag_views):
+            if v_idx + 1 >= len(dag_views):
+                break
+            next_view = dag_views[v_idx + 1]
+            if actual_view is None:
+                actual_view = view
+            actual_next_view = []
+            pred_op_of_next_view_op = {}
+            for op in actual_view:
+                # find actual succ op in next view and create virtual op
+                for succ_op in outdegs[op.name]:
+                    if succ_op in next_view:
+                        if succ_op not in actual_next_view:
+                            actual_next_view.append(succ_op)
+                        if succ_op.name not in pred_op_of_next_view_op:
+                            pred_op_of_next_view_op[succ_op.name] = []
+                        pred_op_of_next_view_op[succ_op.name].append(op)
+                    else:
+                        # create virtual op
+                        virtual_op = gen_virtual_op(virtual_op_name_gen)
+                        virtual_ops.append(virtual_op)
+                        outdegs[virtual_op.name] = [succ_op]
+                        actual_next_view.append(virtual_op)
+                        pred_op_of_next_view_op[virtual_op.name] = [op]
+                        virtual_op.add_virtual_pred_op(op)
+            actual_view = actual_next_view
+            # create channel
+            processed_op = set()
+            for o_idx, op in enumerate(actual_next_view):
+                if op.name in processed_op:
+                    continue
+                channel = gen_channel(channel_name_gen)
+                channels.append(channel)
+                logging.debug("{} => {}".format(channel.name, op.name))
+                op.add_input_channel(channel)
+                pred_ops = pred_op_of_next_view_op[op.name]
+                if v_idx == 0:
+                    input_channel = channel
+                else:
+                    # if pred_op is virtual op, it will use ancestors as producers to channel
+                    for pred_op in pred_ops:
+                        logging.debug("{} => {}".format(pred_op.name,
+                                                        channel.name))
+                        pred_op.add_output_channel(channel)
+                processed_op.add(op.name)
+                # find same input op to combine channel
+                for other_op in actual_next_view[o_idx + 1:]:
+                    if other_op.name in processed_op:
+                        continue
+                    other_pred_ops = pred_op_of_next_view_op[other_op.name]
+                    if len(other_pred_ops) != len(pred_ops):
+                        continue
+                    same_flag = True
+                    for pred_op in pred_ops:
+                        if pred_op not in other_pred_ops:
+                            same_flag = False
+                            break
+                    if same_flag:
+                        logging.debug("{} => {}".format(channel.name,
+                                                        other_op.name))
+                        other_op.add_input_channel(channel)
+                        processed_op.add(other_op.name)
+        output_channel = gen_channel(channel_name_gen)
+        channels.append(output_channel)
+        last_op = dag_views[-1][0]
+        last_op.add_output_channel(output_channel)
+
+        self._actual_ops = virtual_ops
+        for op in self._user_ops:
+            if len(op.get_input_ops()) == 0:
+                # pass read op
+                continue
+            self._actual_ops.append(op)
+        self._channels = channels
+        for c in channels:
+            logging.debug(c.debug())
+        return input_channel, output_channel
+
+    def prepare_server(self, port, worker_num):
+        self._port = port
+        self._worker_num = worker_num
+
+        input_channel, output_channel = self._topo_sort()
+        self._in_channel = input_channel
+        self._out_channel = output_channel
+        for op in self._actual_ops:
+            if op.with_serving:
+                self.prepare_serving(op)
+        self.gen_desc()
+
+    def _run_ops(self):
+        threads_or_proces = []
+        for op in self._actual_ops:
+            op.init_profiler(_profiler)
+            if self._use_multithread:
+                threads_or_proces.extend(
+                    op.start_with_thread(self._client_type, self._use_future))
+            else:
+                threads_or_proces.extend(
+                    op.start_with_process(self._client_type, self._use_future))
+        return threads_or_proces
+
+    def _stop_ops(self):
+        for op in self._actual_ops:
+            op.stop()
+
+    def run_server(self):
+        op_threads_or_proces = self._run_ops()
+        server = grpc.server(
+            futures.ThreadPoolExecutor(max_workers=self._worker_num))
+        general_python_service_pb2_grpc.add_GeneralPythonServiceServicer_to_server(
+            GeneralPythonService(self._in_channel, self._out_channel,
+                                 self._retry), server)
+        server.add_insecure_port('[::]:{}'.format(self._port))
+        server.start()
+        server.wait_for_termination()
+        self._stop_ops()  # TODO
+        for x in op_threads_or_proces:
+            x.join()
+
+    def prepare_serving(self, op):
+        model_path = op._server_model
+        port = op._server_port
+        device = op._device
+
+        if self._client_type == "grpc":
+            if device == "cpu":
+                cmd = "(Use grpc impl) python -m paddle_serving_server.serve" \
+                      " --model {} --thread 4 --port {} --use_multilang &>/dev/null &".format(model_path, port)
+            else:
+                cmd = "(Use grpc impl) python -m paddle_serving_server_gpu.serve" \
+                      " --model {} --thread 4 --port {} --use_multilang &>/dev/null &".format(model_path, port)
+        elif self._client_type == "brpc":
+            if device == "cpu":
+                cmd = "(Use brpc impl) python -m paddle_serving_server.serve" \
+                      " --model {} --thread 4 --port {} &>/dev/null &".format(model_path, port)
+            else:
+                cmd = "(Use brpc impl) python -m paddle_serving_server_gpu.serve" \
+                      " --model {} --thread 4 --port {} &>/dev/null &".format(model_path, port)
+        else:
+            raise Exception("unknow client type: {}".format(self._client_type))
+        # run a server (not in PyServing)
+        logging.info("run a server (not in PyServing): {}".format(cmd))

python/pipeline/profiler.py

@@ -12,3 +12,50 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # pylint: disable=doc-string-missing
+
+import os
+import sys
+if sys.version_info.major == 2:
+    import Queue
+elif sys.version_info.major == 3:
+    import queue as Queue
+else:
+    raise Exception("Error Python version")
+import time
+
+
+class TimeProfiler(object):
+    def __init__(self):
+        self._pid = os.getpid()
+        self._print_head = 'PROFILE\tpid:{}\t'.format(self._pid)
+        self._time_record = Queue.Queue()
+        self._enable = False
+
+    def enable(self, enable):
+        self._enable = enable
+
+    def record(self, name_with_tag):
+        if self._enable is False:
+            return
+        name_with_tag = name_with_tag.split("_")
+        tag = name_with_tag[-1]
+        name = '_'.join(name_with_tag[:-1])
+        self._time_record.put((name, tag, int(round(time.time() * 1000000))))
+
+    def print_profile(self):
+        if self._enable is False:
+            return
+        sys.stderr.write(self._print_head)
+        tmp = {}
+        while not self._time_record.empty():
+            name, tag, timestamp = self._time_record.get()
+            if name in tmp:
+                ptag, ptimestamp = tmp.pop(name)
+                sys.stderr.write("{}_{}:{} ".format(name, ptag, ptimestamp))
+                sys.stderr.write("{}_{}:{} ".format(name, tag, timestamp))
+            else:
+                tmp[name] = (tag, timestamp)
+        sys.stderr.write('\n')
+        for name, item in tmp.items():
+            tag, timestamp = item
+            self._time_record.put((name, tag, timestamp))

python/setup.py.server.in

@@ -42,7 +42,8 @@ REQUIRED_PACKAGES = [
 ]
 
 packages=['paddle_serving_server',
-          'paddle_serving_server.proto']
+          'paddle_serving_server.proto',
+          'paddle_serving_server.pipeline']
 
 package_dir={'paddle_serving_server':
              '${PADDLE_SERVING_BINARY_DIR}/python/paddle_serving_server',

python/setup.py.server_gpu.in

@@ -43,7 +43,8 @@ REQUIRED_PACKAGES = [
 
 
 packages=['paddle_serving_server_gpu',
-          'paddle_serving_server_gpu.proto']
+          'paddle_serving_server_gpu.proto',
+          'paddle_serving_server.pipeline']
 
 package_dir={'paddle_serving_server_gpu':
              '${PADDLE_SERVING_BINARY_DIR}/python/paddle_serving_server_gpu',