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      1 /* Copyright 2017 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/compiler/xla/service/interpreter/platform.h"
     17 
     18 #include <utility>
     19 
     20 #include "tensorflow/compiler/xla/service/interpreter/executor.h"
     21 #include "tensorflow/compiler/xla/service/interpreter/platform_id.h"
     22 #include "tensorflow/stream_executor/device_options.h"
     23 #include "tensorflow/stream_executor/lib/initialize.h"
     24 #include "tensorflow/stream_executor/lib/ptr_util.h"
     25 #include "tensorflow/stream_executor/lib/status.h"
     26 #include "tensorflow/stream_executor/lib/status_macros.h"
     27 #include "tensorflow/stream_executor/lib/stringprintf.h"
     28 #include "tensorflow/stream_executor/multi_platform_manager.h"
     29 #include "tensorflow/stream_executor/platform.h"
     30 
     31 namespace se = ::perftools::gputools;
     32 namespace sep = ::perftools::gputools::interpreter;
     33 
     34 namespace perftools {
     35 namespace gputools {
     36 namespace interpreter {
     37 
     38 InterpreterPlatform::InterpreterPlatform() : name_("Interpreter") {}
     39 
     40 InterpreterPlatform::~InterpreterPlatform() {}
     41 
     42 Platform::Id InterpreterPlatform::id() const { return kInterpreterPlatformId; }
     43 
     44 int InterpreterPlatform::VisibleDeviceCount() const { return 1; }
     45 
     46 const string& InterpreterPlatform::Name() const { return name_; }
     47 
     48 port::StatusOr<StreamExecutor*> InterpreterPlatform::ExecutorForDevice(
     49     int ordinal) {
     50   StreamExecutorConfig config;
     51   config.ordinal = ordinal;
     52   config.plugin_config = PluginConfig();
     53   config.device_options = DeviceOptions::Default();
     54   return GetExecutor(config);
     55 }
     56 
     57 port::StatusOr<StreamExecutor*>
     58 InterpreterPlatform::ExecutorForDeviceWithPluginConfig(
     59     int device_ordinal, const PluginConfig& plugin_config) {
     60   StreamExecutorConfig config;
     61   config.ordinal = device_ordinal;
     62   config.plugin_config = plugin_config;
     63   config.device_options = DeviceOptions::Default();
     64   return GetExecutor(config);
     65 }
     66 
     67 port::StatusOr<StreamExecutor*> InterpreterPlatform::GetExecutor(
     68     const StreamExecutorConfig& config) {
     69   return executor_cache_.GetOrCreate(
     70       config, [&]() { return GetUncachedExecutor(config); });
     71 }
     72 
     73 port::StatusOr<std::unique_ptr<StreamExecutor>>
     74 InterpreterPlatform::GetUncachedExecutor(const StreamExecutorConfig& config) {
     75   auto executor = port::MakeUnique<StreamExecutor>(
     76       this, port::MakeUnique<InterpreterExecutor>(config.plugin_config));
     77   auto init_status = executor->Init(config.ordinal, config.device_options);
     78   if (!init_status.ok()) {
     79     return port::Status{
     80         port::error::INTERNAL,
     81         port::Printf(
     82             "failed initializing StreamExecutor for device ordinal %d: %s",
     83             config.ordinal, init_status.ToString().c_str())};
     84   }
     85 
     86   return std::move(executor);
     87 }
     88 
     89 void InterpreterPlatform::RegisterTraceListener(
     90     std::unique_ptr<TraceListener> listener) {
     91   LOG(FATAL) << "not yet implemented: register executor trace listener";
     92 }
     93 
     94 void InterpreterPlatform::UnregisterTraceListener(TraceListener* listener) {
     95   LOG(FATAL) << "not yet implemented: unregister executor trace listener";
     96 }
     97 
     98 static void InitializeInterpreterPlatform() {
     99   std::unique_ptr<se::Platform> platform(new sep::InterpreterPlatform);
    100   SE_CHECK_OK(se::MultiPlatformManager::RegisterPlatform(std::move(platform)));
    101 }
    102 
    103 }  // namespace interpreter
    104 }  // namespace gputools
    105 }  // namespace perftools
    106 
    107 REGISTER_MODULE_INITIALIZER(interpreter_platform,
    108                             sep::InitializeInterpreterPlatform());
    109 
    110 DECLARE_MODULE_INITIALIZER(multi_platform_manager);
    111 
    112 // Note that module initialization sequencing is not supported in the
    113 // open-source project, so this will be a no-op there.
    114 REGISTER_MODULE_INITIALIZER_SEQUENCE(interpreter_platform,
    115                                      multi_platform_manager);
    116