Narumol Prangnawarat | cad4e91 | 2020-06-02 12:07:43 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2020 Arm Ltd. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | #define LOG_TAG "ArmnnDriver" |
| 7 | |
| 8 | #include "RequestThread_1_3.hpp" |
| 9 | |
| 10 | #include "ArmnnPreparedModel_1_3.hpp" |
| 11 | |
| 12 | #include <armnn/utility/Assert.hpp> |
| 13 | |
| 14 | #include <log/log.h> |
| 15 | |
| 16 | using namespace android; |
| 17 | |
| 18 | namespace armnn_driver |
| 19 | { |
| 20 | |
| 21 | template <template <typename HalVersion> class PreparedModel, typename HalVersion, typename CallbackContext> |
| 22 | RequestThread_1_3<PreparedModel, HalVersion, CallbackContext>::RequestThread_1_3() |
| 23 | { |
| 24 | ALOGV("RequestThread_1_3::RequestThread_1_3()"); |
| 25 | m_Thread = std::make_unique<std::thread>(&RequestThread_1_3::Process, this); |
| 26 | } |
| 27 | |
| 28 | template <template <typename HalVersion> class PreparedModel, typename HalVersion, typename CallbackContext> |
| 29 | RequestThread_1_3<PreparedModel, HalVersion, CallbackContext>::~RequestThread_1_3() |
| 30 | { |
| 31 | ALOGV("RequestThread_1_3::~RequestThread_1_3()"); |
| 32 | |
| 33 | try |
| 34 | { |
| 35 | // Coverity fix: The following code may throw an exception of type std::length_error. |
| 36 | |
| 37 | // This code is meant to to terminate the inner thread gracefully by posting an EXIT message |
| 38 | // to the thread's message queue. However, according to Coverity, this code could throw an exception and fail. |
| 39 | // Since only one static instance of RequestThread is used in the driver (in ArmnnPreparedModel), |
| 40 | // this destructor is called only when the application has been closed, which means that |
| 41 | // the inner thread will be terminated anyway, although abruptly, in the event that the destructor code throws. |
| 42 | // Wrapping the destructor's code with a try-catch block simply fixes the Coverity bug. |
| 43 | |
| 44 | // Post an EXIT message to the thread |
| 45 | std::shared_ptr<AsyncExecuteData> nulldata(nullptr); |
| 46 | auto pMsg = std::make_shared<ThreadMsg>(ThreadMsgType::EXIT, nulldata); |
| 47 | PostMsg(pMsg); |
| 48 | // Wait for the thread to terminate, it is deleted automatically |
| 49 | m_Thread->join(); |
| 50 | } |
| 51 | catch (const std::exception&) { } // Swallow any exception. |
| 52 | } |
| 53 | |
| 54 | template <template <typename HalVersion> class PreparedModel, typename HalVersion, typename CallbackContext> |
| 55 | void RequestThread_1_3<PreparedModel, HalVersion, CallbackContext>::PostMsg(PreparedModel<HalVersion>* model, |
| 56 | std::shared_ptr<std::vector<::android::nn::RunTimePoolInfo>>& memPools, |
| 57 | std::shared_ptr<armnn::InputTensors>& inputTensors, |
| 58 | std::shared_ptr<armnn::OutputTensors>& outputTensors, |
| 59 | CallbackContext callbackContext) |
| 60 | { |
| 61 | ALOGV("RequestThread_1_3::PostMsg(...)"); |
| 62 | auto data = std::make_shared<AsyncExecuteData>(model, |
| 63 | memPools, |
| 64 | inputTensors, |
| 65 | outputTensors, |
| 66 | callbackContext); |
| 67 | auto pMsg = std::make_shared<ThreadMsg>(ThreadMsgType::REQUEST, data); |
| 68 | PostMsg(pMsg, model->GetModelPriority()); |
| 69 | } |
| 70 | |
| 71 | template <template <typename HalVersion> class PreparedModel, typename HalVersion, typename CallbackContext> |
| 72 | void RequestThread_1_3<PreparedModel, HalVersion, CallbackContext>::PostMsg(std::shared_ptr<ThreadMsg>& pMsg, |
| 73 | V1_3::Priority priority) |
| 74 | { |
| 75 | ALOGV("RequestThread_1_3::PostMsg(pMsg)"); |
| 76 | // Add a message to the queue and notify the request thread |
| 77 | std::unique_lock<std::mutex> lock(m_Mutex); |
| 78 | switch (priority) { |
| 79 | case V1_3::Priority::HIGH: |
| 80 | m_HighPriorityQueue.push(pMsg); |
| 81 | break; |
| 82 | case V1_3::Priority::LOW: |
| 83 | m_LowPriorityQueue.push(pMsg); |
| 84 | break; |
| 85 | case V1_3::Priority::MEDIUM: |
| 86 | default: |
| 87 | m_MediumPriorityQueue.push(pMsg); |
| 88 | } |
| 89 | m_Cv.notify_one(); |
| 90 | } |
| 91 | |
| 92 | template <template <typename HalVersion> class PreparedModel, typename HalVersion, typename CallbackContext> |
| 93 | void RequestThread_1_3<PreparedModel, HalVersion, CallbackContext>::Process() |
| 94 | { |
| 95 | ALOGV("RequestThread_1_3::Process()"); |
| 96 | int retireRate = RETIRE_RATE; |
| 97 | int highPriorityCount = 0; |
| 98 | int mediumPriorityCount = 0; |
| 99 | while (true) |
| 100 | { |
| 101 | std::shared_ptr<ThreadMsg> pMsg(nullptr); |
| 102 | { |
| 103 | // Wait for a message to be added to the queue |
| 104 | // This is in a separate scope to minimise the lifetime of the lock |
| 105 | std::unique_lock<std::mutex> lock(m_Mutex); |
| 106 | while (m_HighPriorityQueue.empty() && m_MediumPriorityQueue.empty() && m_LowPriorityQueue.empty()) |
| 107 | { |
| 108 | m_Cv.wait(lock); |
| 109 | } |
| 110 | // Get the message to process from the front of each queue based on priority from high to low |
| 111 | // Get high priority first if it does not exceed the retire rate |
| 112 | if (!m_HighPriorityQueue.empty() && highPriorityCount < retireRate) |
| 113 | { |
| 114 | pMsg = m_HighPriorityQueue.front(); |
| 115 | m_HighPriorityQueue.pop(); |
| 116 | highPriorityCount += 1; |
| 117 | } |
| 118 | // If high priority queue is empty or the count exceeds the retire rate, get medium priority message |
| 119 | else if (!m_MediumPriorityQueue.empty() && mediumPriorityCount < retireRate) |
| 120 | { |
| 121 | pMsg = m_MediumPriorityQueue.front(); |
| 122 | m_MediumPriorityQueue.pop(); |
| 123 | mediumPriorityCount += 1; |
| 124 | // Reset high priority count |
| 125 | highPriorityCount = 0; |
| 126 | } |
| 127 | // If medium priority queue is empty or the count exceeds the retire rate, get low priority message |
| 128 | else if (!m_LowPriorityQueue.empty()) |
| 129 | { |
| 130 | pMsg = m_LowPriorityQueue.front(); |
| 131 | m_LowPriorityQueue.pop(); |
| 132 | // Reset high and medium priority count |
| 133 | highPriorityCount = 0; |
| 134 | mediumPriorityCount = 0; |
| 135 | } |
| 136 | else |
| 137 | { |
| 138 | // Reset high and medium priority count |
| 139 | highPriorityCount = 0; |
| 140 | mediumPriorityCount = 0; |
| 141 | continue; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | switch (pMsg->type) |
| 146 | { |
| 147 | case ThreadMsgType::REQUEST: |
| 148 | { |
| 149 | ALOGV("RequestThread_1_3::Process() - request"); |
| 150 | // invoke the asynchronous execution method |
| 151 | PreparedModel<HalVersion>* model = pMsg->data->m_Model; |
| 152 | model->ExecuteGraph(pMsg->data->m_MemPools, |
| 153 | *(pMsg->data->m_InputTensors), |
| 154 | *(pMsg->data->m_OutputTensors), |
| 155 | pMsg->data->m_CallbackContext); |
| 156 | break; |
| 157 | } |
| 158 | |
| 159 | case ThreadMsgType::EXIT: |
| 160 | { |
| 161 | ALOGV("RequestThread_1_3::Process() - exit"); |
| 162 | // delete all remaining messages (there should not be any) |
| 163 | std::unique_lock<std::mutex> lock(m_Mutex); |
| 164 | while (!m_HighPriorityQueue.empty()) |
| 165 | { |
| 166 | m_HighPriorityQueue.pop(); |
| 167 | } |
| 168 | while (!m_MediumPriorityQueue.empty()) |
| 169 | { |
| 170 | m_MediumPriorityQueue.pop(); |
| 171 | } |
| 172 | while (!m_LowPriorityQueue.empty()) |
| 173 | { |
| 174 | m_LowPriorityQueue.pop(); |
| 175 | } |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | default: |
| 180 | // this should be unreachable |
| 181 | ALOGE("RequestThread_1_3::Process() - invalid message type"); |
| 182 | ARMNN_ASSERT_MSG(false, "ArmNN: RequestThread_1_3: invalid message type"); |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /// |
| 188 | /// Class template specializations |
| 189 | /// |
| 190 | |
| 191 | template class RequestThread_1_3<ArmnnPreparedModel_1_3, hal_1_3::HalPolicy, CallbackContext_1_3>; |
| 192 | |
| 193 | } // namespace armnn_driver |