Jan Eilers | 2cd1847 | 2020-12-15 10:42:38 +0000 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2020 Arm Ltd and Contributors. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | #include "armnn_delegate.hpp" |
| 6 | #include <armnn/Logging.hpp> |
| 7 | |
| 8 | #include <iostream> |
| 9 | #include <tensorflow/lite/minimal_logging.h> |
| 10 | |
| 11 | namespace tflite |
| 12 | { |
| 13 | |
| 14 | /** |
| 15 | * This file defines two symbols that need to be exported to use the TFLite external delegate provider. This is a plugin |
| 16 | * that can be used for fast integration of delegates into benchmark tests and other tools. It allows loading of |
| 17 | * a dynamic delegate library at runtime. |
| 18 | * |
| 19 | * The external delegate also has Tensorflow Lite Python bindings. Therefore the dynamic external delegate |
| 20 | * can be directly used with Tensorflow Lite Python APIs. |
| 21 | * |
| 22 | * See tensorflow/lite/delegates/external for details or visit the tensorflow guide |
| 23 | * [here](https://www.tensorflow.org/lite/performance/implementing_delegate#option_2_leverage_external_delegate) |
| 24 | */ |
| 25 | |
| 26 | extern "C" |
| 27 | { |
| 28 | std::vector<std::string> gpu_options {"gpu-tuning-level", |
| 29 | "gpu-tuning-file", |
| 30 | "gpu-kernel-profiling-enabled"}; |
| 31 | |
| 32 | |
| 33 | /** |
| 34 | * Create an ArmNN delegate plugin |
| 35 | * |
| 36 | * Available options: |
| 37 | * |
| 38 | * Option key: "backends" \n |
| 39 | * Possible values: ["EthosNPU"/"GpuAcc"/"CpuAcc"/"CpuRef"] \n |
| 40 | * Descriptions: A comma separated list without whitespaces of |
| 41 | * backends which should be used for execution. Falls |
| 42 | * back to next backend in list if previous doesn't |
| 43 | * provide support for operation. e.g. "GpuAcc,CpuAcc" |
| 44 | * |
| 45 | * Option key: "logging-severity" \n |
| 46 | * Possible values: ["trace"/"debug"/"info"/"warning"/"error"/"fatal"] \n |
| 47 | * Description: Sets the logging severity level for ArmNN. Logging |
| 48 | * is turned off if this option is not provided. |
| 49 | * |
| 50 | * Option key: "gpu-tuning-level" \n |
| 51 | * Possible values: ["0"/"1"/"2"/"3"] \n |
| 52 | * Description: 0=UseOnly(default), 1=RapidTuning, 2=NormalTuning, |
| 53 | * 3=ExhaustiveTuning. Requires option gpu-tuning-file. |
| 54 | * 1,2 and 3 will create a tuning-file, 0 will apply the |
| 55 | * tunings from an existing file |
| 56 | * |
| 57 | * Option key: "gpu-tuning-file" \n |
| 58 | * Possible values: [filenameString] \n |
| 59 | * Description: File name for the tuning file. |
| 60 | * |
| 61 | * Option key: "gpu-kernel-profiling-enabled" \n |
| 62 | * Possible values: ["true"/"false"] \n |
| 63 | * Description: Enables GPU kernel profiling |
| 64 | * |
| 65 | * |
| 66 | * @param[in] option_keys Delegate option names |
| 67 | * @param[in] options_values Delegate option values |
| 68 | * @param[in] num_options Number of delegate options |
| 69 | * @param[in,out] report_error Error callback function |
| 70 | * |
| 71 | * @return An ArmNN delegate if it succeeds else NULL |
| 72 | */ |
| 73 | TfLiteDelegate* tflite_plugin_create_delegate(char** options_keys, |
| 74 | char** options_values, |
| 75 | size_t num_options, |
| 76 | void (*report_error)(const char*)) |
| 77 | { |
| 78 | // Returning null indicates an error during delegate creation so we initialize with that |
| 79 | TfLiteDelegate* delegate = nullptr; |
| 80 | try |
| 81 | { |
| 82 | // (Initializes with CpuRef backend) |
| 83 | armnnDelegate::DelegateOptions options = armnnDelegate::TfLiteArmnnDelegateOptionsDefault(); |
| 84 | for (size_t i = 0; i < num_options; ++i) |
| 85 | { |
| 86 | // Process backends |
| 87 | if (std::string(options_keys[i]) == std::string("backends")) |
| 88 | { |
| 89 | // The backend option is a comma separated string of backendIDs that needs to be split |
| 90 | std::vector<armnn::BackendId> backends; |
| 91 | char* pch; |
| 92 | pch = strtok(options_values[i],","); |
| 93 | while (pch != NULL) |
| 94 | { |
| 95 | backends.push_back(pch); |
| 96 | pch = strtok (NULL, ","); |
| 97 | } |
| 98 | options.SetBackends(backends); |
| 99 | } |
| 100 | // Process logging level |
| 101 | else if (std::string(options_keys[i]) == std::string("logging-severity")) |
| 102 | { |
| 103 | options.SetLoggingSeverity(options_values[i]); |
| 104 | } |
| 105 | // Process GPU backend options |
| 106 | else if (std::string(options_keys[i]) == std::string("gpu-tuning-level")) |
| 107 | { |
| 108 | armnn::BackendOptions option("GpuAcc", {{"TuningLevel", atoi(options_values[i])}}); |
| 109 | options.AddBackendOption(option); |
| 110 | } |
| 111 | else if (std::string(options_keys[i]) == std::string("gpu-tuning-file")) |
| 112 | { |
| 113 | armnn::BackendOptions option("GpuAcc", {{"TuningFile", std::string(options_values[i])}}); |
| 114 | options.AddBackendOption(option); |
| 115 | } |
| 116 | else if (std::string(options_keys[i]) == std::string("gpu-kernel-profiling-enabled")) |
| 117 | { |
| 118 | armnn::BackendOptions option("GpuAcc", {{"KernelProfilingEnabled", (*options_values[i] != '0')}}); |
| 119 | options.AddBackendOption(option); |
| 120 | } |
| 121 | else |
| 122 | { |
| 123 | throw armnn::Exception("Unknown option for the ArmNN Delegate given: " + std::string(options_keys[i])); |
| 124 | } |
| 125 | } |
| 126 | delegate = TfLiteArmnnDelegateCreate(options); |
| 127 | } |
| 128 | catch (const std::exception& ex) |
| 129 | { |
| 130 | if(report_error) |
| 131 | { |
| 132 | report_error(ex.what()); |
| 133 | } |
| 134 | } |
| 135 | return delegate; |
| 136 | } |
| 137 | |
| 138 | /** Destroy a given delegate plugin |
| 139 | * |
| 140 | * @param[in] delegate Delegate to destruct |
| 141 | */ |
| 142 | void tflite_plugin_destroy_delegate(TfLiteDelegate* delegate) |
| 143 | { |
| 144 | armnnDelegate::TfLiteArmnnDelegateDelete(delegate); |
| 145 | } |
| 146 | |
| 147 | } // extern "C" |
| 148 | } // namespace tflite |