1 /* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
2
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15
16 #include "tensorflow/stream_executor/platform.h"
17
18 #include "tensorflow/stream_executor/platform/port.h"
19
20 #include "absl/strings/str_cat.h"
21 #include "tensorflow/stream_executor/lib/error.h"
22 #include "tensorflow/stream_executor/platform/logging.h"
23 #include "tensorflow/stream_executor/stream_executor_pimpl.h"
24
25 namespace stream_executor {
26
PlatformKindString(PlatformKind kind)27 string PlatformKindString(PlatformKind kind) {
28 switch (kind) {
29 case PlatformKind::kCuda:
30 return "CUDA";
31 case PlatformKind::kROCm:
32 return "ROCm";
33 case PlatformKind::kOpenCL:
34 return "OpenCL";
35 case PlatformKind::kHost:
36 return "Host";
37 case PlatformKind::kMock:
38 return "Mock";
39 default:
40 return absl::StrCat("InvalidPlatformKind(", static_cast<int>(kind), ")");
41 }
42 }
43
PlatformKindFromString(string kind)44 PlatformKind PlatformKindFromString(string kind) {
45 for (int i = 0; i < static_cast<int>(PlatformKind::kSize); ++i) {
46 if (kind == PlatformKindString(static_cast<PlatformKind>(i))) {
47 return static_cast<PlatformKind>(i);
48 }
49 }
50
51 return PlatformKind::kInvalid;
52 }
53
PlatformIsRunnable(PlatformKind kind)54 bool PlatformIsRunnable(PlatformKind kind) {
55 switch (kind) {
56 case PlatformKind::kCuda:
57 case PlatformKind::kROCm:
58 case PlatformKind::kOpenCL:
59 case PlatformKind::kHost:
60 return true;
61 default:
62 return false;
63 }
64 }
65
PlatformIsRunnableOnDevice(PlatformKind kind)66 bool PlatformIsRunnableOnDevice(PlatformKind kind) {
67 switch (kind) {
68 case PlatformKind::kCuda:
69 case PlatformKind::kROCm:
70 case PlatformKind::kOpenCL:
71 return true;
72 default:
73 return false;
74 }
75 }
76
CheckPlatformKindIsValid(PlatformKind kind)77 void CheckPlatformKindIsValid(PlatformKind kind) {
78 CHECK(static_cast<int>(PlatformKind::kCuda) <= static_cast<int>(kind) &&
79 static_cast<int>(kind) <= static_cast<int>(PlatformKind::kMock))
80 << "invalid GPU executor kind: " << PlatformKindString(kind);
81 }
82
StreamExecutorConfig()83 StreamExecutorConfig::StreamExecutorConfig()
84 : ordinal(-1), device_options(DeviceOptions::Default()) {}
85
StreamExecutorConfig(int ordinal_in)86 StreamExecutorConfig::StreamExecutorConfig(int ordinal_in)
87 : ordinal(ordinal_in), device_options(DeviceOptions::Default()) {}
88
~Platform()89 Platform::~Platform() {}
90
Initialized() const91 bool Platform::Initialized() const { return true; }
92
Initialize(const std::map<string,string> & platform_options)93 port::Status Platform::Initialize(
94 const std::map<string, string> &platform_options) {
95 if (!platform_options.empty()) {
96 return port::Status(port::error::UNIMPLEMENTED,
97 "this platform does not support custom initialization");
98 }
99 return port::Status::OK();
100 }
101
ForceExecutorShutdown()102 port::Status Platform::ForceExecutorShutdown() {
103 return port::Status(port::error::UNIMPLEMENTED,
104 "executor shutdown is not supported on this platform");
105 }
106
GetPeerAccessMap()107 std::unique_ptr<Platform::PeerAccessMap> Platform::GetPeerAccessMap() {
108 auto *map = new PeerAccessMap;
109
110 int device_count = VisibleDeviceCount();
111 for (int i = 0; i < device_count; ++i) {
112 for (int j = 0; j < device_count; ++j) {
113 StreamExecutor *from = ExecutorForDevice(i).ValueOrDie();
114 StreamExecutor *to = ExecutorForDevice(j).ValueOrDie();
115 (*map)[{i, j}] = from->CanEnablePeerAccessTo(to);
116 }
117 }
118
119 return std::unique_ptr<Platform::PeerAccessMap>{map};
120 }
121
EnablePeerAccess()122 port::Status Platform::EnablePeerAccess() {
123 auto peer_access_map = GetPeerAccessMap();
124 for (const auto &access : *peer_access_map) {
125 auto devices = access.first;
126 if (access.second) {
127 StreamExecutor *from = ExecutorForDevice(devices.first).ValueOrDie();
128 StreamExecutor *to = ExecutorForDevice(devices.second).ValueOrDie();
129 auto status = from->EnablePeerAccessTo(to);
130 if (!status.ok()) {
131 return status;
132 }
133 } else {
134 LOG(INFO) << "cannot enable peer access from device ordinal "
135 << devices.first << " to device ordinal " << devices.second;
136 }
137 }
138 return port::Status::OK();
139 }
140
141 } // namespace stream_executor
142