# Copyright (c) 2018 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. import unittest import paddle.fluid as fluid import paddle.fluid.core as core from paddle.fluid import framework, unique_name, layer_helper from paddle.fluid.executor import Executor from paddle.fluid.layers import fill_constant, assign, While, elementwise_add, Print class TestRoutineOp(unittest.TestCase): def test_simple_routine(self): ch = fluid.make_channel(dtype=core.VarDesc.VarType.LOD_TENSOR) # Create LOD_TENSOR and put it into the scope. This placeholder # variable will be filled in and returned by fluid.channel_recv result = self._create_tensor('return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.INT64) with fluid.Go(): input_value = fill_constant( shape=[1], dtype=core.VarDesc.VarType.FP64, value=1234) fluid.channel_send(ch, input_value) result, status = fluid.channel_recv(ch, result) fluid.channel_close(ch) cpu = core.CPUPlace() exe = Executor(cpu) outs = exe.run(fetch_list=[result]) self.assertEqual(outs[0], 1234) def test_daisy_chain(self): ''' Mimics classic Daisy-chain test: https://talks.golang.org/2012/concurrency.slide#39 ''' n = 100 leftmost = fluid.make_channel(dtype=core.VarDesc.VarType.LOD_TENSOR) left = leftmost # TODO(thuan): Use fluid.While() after scope capture is implemented. # https://github.com/PaddlePaddle/Paddle/issues/8502 for i in range(n): right = fluid.make_channel(dtype=core.VarDesc.VarType.LOD_TENSOR) with fluid.Go(): one_tensor = self._create_one_dim_tensor(1) result = self._create_tensor('return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.INT64) result, status = fluid.channel_recv(right, result) one_added = fluid.layers.elementwise_add(x=one_tensor, y=result) fluid.channel_send(left, one_added) left = right # Trigger the channel propagation by sending a "1" to rightmost channel with fluid.Go(): one_tensor = self._create_one_dim_tensor(1) fluid.channel_send(right, one_tensor) leftmost_result = self._create_tensor('return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.INT64) leftmost_result, status = fluid.channel_recv(leftmost, leftmost_result) cpu = core.CPUPlace() exe = Executor(cpu) leftmost_data = exe.run(fetch_list=[leftmost_result]) # The leftmost_data should be equal to the number of channels + 1 self.assertEqual(leftmost_data[0][0], n + 1) def _create_one_dim_tensor(self, value): one_dim_tensor = fill_constant(shape=[1], dtype='int', value=value) one_dim_tensor.stop_gradient = True return one_dim_tensor def _create_tensor(self, name, type, dtype): return framework.default_main_program().current_block().create_var( name=unique_name.generate(name), type=type, dtype=dtype) def _create_persistable_tensor(self, name, type, dtype): return framework.default_main_program().current_block().create_var( name=unique_name.generate(name), type=type, dtype=dtype, persistable=True) def test_select(self): with framework.program_guard(framework.Program()): ch1 = fluid.make_channel( dtype=core.VarDesc.VarType.LOD_TENSOR, capacity=1) result1 = self._create_tensor('return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.FP64) input_value = fill_constant( shape=[1], dtype=core.VarDesc.VarType.FP64, value=10) with fluid.Select() as select: with select.case(fluid.channel_send, ch1, input_value): # Execute something. pass with select.default(): pass # This should not block because we are using a buffered channel. result1, status = fluid.channel_recv(ch1, result1) fluid.channel_close(ch1) cpu = core.CPUPlace() exe = Executor(cpu) result = exe.run(fetch_list=[result1]) self.assertEqual(result[0][0], 10) def test_fibonacci(self): """ Mimics Fibonacci Go example: https://tour.golang.org/concurrency/5 """ with framework.program_guard(framework.Program()): quit_ch_input_var = self._create_persistable_tensor( 'quit_ch_input', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.INT32) quit_ch_input = fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=0, out=quit_ch_input_var) result = self._create_persistable_tensor( 'result', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.INT32) fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=0, out=result) x = fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=0) y = fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=1) while_cond = fill_constant( shape=[1], dtype=core.VarDesc.VarType.BOOL, value=True) while_false = fill_constant( shape=[1], dtype=core.VarDesc.VarType.BOOL, value=False) x_tmp = fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=0) def fibonacci(channel, quit_channel): while_op = While(cond=while_cond) with while_op.block(): result2 = fill_constant( shape=[1], dtype=core.VarDesc.VarType.INT32, value=0) with fluid.Select() as select: with select.case( fluid.channel_send, channel, x, is_copy=True): assign(input=x, output=x_tmp) assign(input=y, output=x) assign(elementwise_add(x=x_tmp, y=y), output=y) with select.case(fluid.channel_recv, quit_channel, result2): # Quit helper = layer_helper.LayerHelper('assign') helper.append_op( type='assign', inputs={'X': [while_false]}, outputs={'Out': [while_cond]}) ch1 = fluid.make_channel(dtype=core.VarDesc.VarType.LOD_TENSOR) quit_ch = fluid.make_channel(dtype=core.VarDesc.VarType.LOD_TENSOR) with fluid.Go(): for i in xrange(10): fluid.channel_recv(ch1, result) Print(result) fluid.channel_send(quit_ch, quit_ch_input) fibonacci(ch1, quit_ch) fluid.channel_close(ch1) fluid.channel_close(quit_ch) cpu = core.CPUPlace() exe = Executor(cpu) exe_result = exe.run(fetch_list=[result]) self.assertEqual(exe_result[0][0], 34) def test_ping_pong(self): """ Mimics Ping Pong example: https://gobyexample.com/channel-directions """ with framework.program_guard(framework.Program()): result = self._create_tensor('return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.FP64) ping_result = self._create_tensor('ping_return_value', core.VarDesc.VarType.LOD_TENSOR, core.VarDesc.VarType.FP64) def ping(ch, message): fluid.channel_send(ch, message, is_copy=True) def pong(ch1, ch2): fluid.channel_recv(ch1, ping_result) fluid.channel_send(ch2, ping_result, is_copy=True) pings = fluid.make_channel( dtype=core.VarDesc.VarType.LOD_TENSOR, capacity=1) pongs = fluid.make_channel( dtype=core.VarDesc.VarType.LOD_TENSOR, capacity=1) msg = fill_constant( shape=[1], dtype=core.VarDesc.VarType.FP64, value=9) ping(pings, msg) pong(pings, pongs) fluid.channel_recv(pongs, result) fluid.channel_close(pings) fluid.channel_close(pongs) cpu = core.CPUPlace() exe = Executor(cpu) exe_result = exe.run(fetch_list=[result]) self.assertEqual(exe_result[0][0], 9) if __name__ == '__main__': unittest.main()