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