1/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15#include "tensorflow/core/common_runtime/rendezvous_util.h"
16#include "tensorflow/core/platform/mutex.h"
17
18#include "tensorflow/core/util/reffed_status_callback.h"
19
20namespace tensorflow {
21
22Status SendTensorsToRendezvous(
23 RendezvousInterface* rendezvous, DeviceContext* device_context,
24 const std::vector<AllocatorAttributes>& alloc_attrs,
25 const std::vector<string>& keys, gtl::ArraySlice<Tensor> tensors_to_send) {
26 if (keys.size() != tensors_to_send.size()) {
27 return errors::InvalidArgument(
28 "keys and tensors_to_send are not the same size. keys.size() = ",
29 keys.size(), "; tensors_to_send.size() = ", tensors_to_send.size());
30 }
31 if (!alloc_attrs.empty() && (keys.size() != alloc_attrs.size())) {
32 return errors::InvalidArgument(
33 "keys and alloc_attrs are not the same size. ",
34 "keys.size() = ", keys.size(),
35 "; alloc_attrs.size() = ", alloc_attrs.size());
36 }
37
38 if (!rendezvous) {
39 return errors::InvalidArgument("Rendezvous is null.");
40 }
41
42 Rendezvous::ParsedKey parsed;
43 for (int i = 0; i < keys.size(); ++i) {
44 Rendezvous::Args rendez_args;
45 rendez_args.device_context = device_context;
46 if (!alloc_attrs.empty()) {
47 rendez_args.alloc_attrs = alloc_attrs[i];
48 }
49 TF_RETURN_IF_ERROR(Rendezvous::ParseKey(keys[i], &parsed));
50 TF_RETURN_IF_ERROR(
51 rendezvous->Send(parsed, rendez_args, tensors_to_send[i], false));
52 }
53 return OkStatus();
54}
55
56void RecvOutputsFromRendezvousAsync(
57 RendezvousInterface* rendezvous, DeviceContext* device_context,
58 const std::vector<AllocatorAttributes>& alloc_attrs,
59 const std::vector<string>& keys, std::vector<Tensor>* received_tensors,
60 StatusCallback done) {
61 if (keys.empty()) {
62 done(OkStatus());
63 return;
64 }
65 if (!alloc_attrs.empty() && (keys.size() != alloc_attrs.size())) {
66 done(errors::InvalidArgument(
67 "keys and alloc_attrs are not the same size. ", "keys.size() = ",
68 keys.size(), "; alloc_attrs.size() = ", alloc_attrs.size()));
69 }
70
71 received_tensors->reserve(keys.size());
72 std::vector<
73 std::tuple<string, Tensor*, Rendezvous::ParsedKey, AllocatorAttributes>>
74 arguments;
75 for (int i = 0; i < keys.size(); ++i) {
76 Rendezvous::ParsedKey parsed;
77 Status s = Rendezvous::ParseKey(keys[i], &parsed);
78 received_tensors->push_back(Tensor());
79 if (!s.ok()) {
80 done(s);
81 return;
82 }
83 AllocatorAttributes alloc_attr;
84 if (!alloc_attrs.empty()) {
85 alloc_attr = alloc_attrs[i];
86 }
87 arguments.emplace_back(keys[i], &((*received_tensors)[i]), parsed,
88 alloc_attr);
89 }
90
91 auto status_cb = new ReffedStatusCallback(std::move(done));
92 for (auto& p : arguments) {
93 const string& key = std::get<0>(p);
94 Tensor* val = std::get<1>(p);
95 Rendezvous::ParsedKey parsed = std::get<2>(p);
96 Rendezvous::Args rendez_args;
97 rendez_args.device_context = device_context;
98 rendez_args.alloc_attrs = std::get<3>(p);
99 status_cb->Ref();
100 rendezvous->RecvAsync(
101 parsed, rendez_args,
102 [val, key, status_cb](const Status& s,
103 const Rendezvous::Args& send_args,
104 const Rendezvous::Args& recv_args,
105 const Tensor& v, const bool is_dead) {
106 Status status = s;
107 if (status.ok()) {
108 *val = v;
109 if (is_dead) {
110 status = errors::InvalidArgument("The tensor returned for ", key,
111 " was not valid.");
112 }
113 }
114 status_cb->UpdateStatus(status);
115 status_cb->Unref();
116 });
117 }
118 status_cb->Unref();
119}
120
121Status RecvOutputsFromRendezvous(RendezvousInterface* rendezvous,
122 NamedTensors* out,
123 const Rendezvous::Args& args) {
124 // Receives values requested by the caller.
125 Rendezvous::ParsedKey parsed;
126 for (auto& p : *out) {
127 const string& key = p.first;
128 Tensor* val = &p.second;
129 bool is_dead = false;
130 TF_RETURN_IF_ERROR(Rendezvous::ParseKey(key, &parsed));
131 TF_RETURN_IF_ERROR(rendezvous->Recv(parsed, args, val, &is_dead));
132 if (is_dead) {
133 return errors::InvalidArgument("The tensor returned for ", key,
134 " was not valid.");
135 }
136 }
137 return OkStatus();
138}
139
140} // namespace tensorflow
141