1 //
2 //
3 // Copyright 2016 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18
19 #include "src/core/util/mpscq.h"
20
21 #include <grpc/support/sync.h>
22 #include <grpc/support/time.h>
23 #include <inttypes.h>
24 #include <stdlib.h>
25
26 #include <memory>
27
28 #include "absl/log/log.h"
29 #include "gtest/gtest.h"
30 #include "src/core/util/thd.h"
31 #include "src/core/util/useful.h"
32 #include "test/core/test_util/test_config.h"
33
34 using grpc_core::MultiProducerSingleConsumerQueue;
35
36 typedef struct test_node {
37 MultiProducerSingleConsumerQueue::Node node;
38 size_t i;
39 size_t* ctr;
40 } test_node;
41
new_node(size_t i,size_t * ctr)42 static test_node* new_node(size_t i, size_t* ctr) {
43 test_node* n = new test_node();
44 n->i = i;
45 n->ctr = ctr;
46 return n;
47 }
48
TEST(MpscqTest,Serial)49 TEST(MpscqTest, Serial) {
50 VLOG(2) << "test_serial";
51 MultiProducerSingleConsumerQueue q;
52 for (size_t i = 0; i < 10000000; i++) {
53 q.Push(&new_node(i, nullptr)->node);
54 }
55 for (size_t i = 0; i < 10000000; i++) {
56 test_node* n = reinterpret_cast<test_node*>(q.Pop());
57 ASSERT_NE(n, nullptr);
58 ASSERT_EQ(n->i, i);
59 delete n;
60 }
61 }
62
63 typedef struct {
64 size_t ctr;
65 MultiProducerSingleConsumerQueue* q;
66 gpr_event* start;
67 } thd_args;
68
69 #define THREAD_ITERATIONS 10000
70
test_thread(void * args)71 static void test_thread(void* args) {
72 thd_args* a = static_cast<thd_args*>(args);
73 gpr_event_wait(a->start, gpr_inf_future(GPR_CLOCK_REALTIME));
74 for (size_t i = 1; i <= THREAD_ITERATIONS; i++) {
75 a->q->Push(&new_node(i, &a->ctr)->node);
76 }
77 }
78
TEST(MpscqTest,Mt)79 TEST(MpscqTest, Mt) {
80 VLOG(2) << "test_mt";
81 gpr_event start;
82 gpr_event_init(&start);
83 grpc_core::Thread thds[100];
84 thd_args ta[GPR_ARRAY_SIZE(thds)];
85 MultiProducerSingleConsumerQueue q;
86 for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
87 ta[i].ctr = 0;
88 ta[i].q = &q;
89 ta[i].start = &start;
90 thds[i] = grpc_core::Thread("grpc_mt_test", test_thread, &ta[i]);
91 thds[i].Start();
92 }
93 size_t num_done = 0;
94 size_t spins = 0;
95 gpr_event_set(&start, reinterpret_cast<void*>(1));
96 while (num_done != GPR_ARRAY_SIZE(thds)) {
97 MultiProducerSingleConsumerQueue::Node* n;
98 while ((n = q.Pop()) == nullptr) {
99 spins++;
100 }
101 test_node* tn = reinterpret_cast<test_node*>(n);
102 ASSERT_EQ(*tn->ctr, tn->i - 1);
103 *tn->ctr = tn->i;
104 if (tn->i == THREAD_ITERATIONS) num_done++;
105 delete tn;
106 }
107 VLOG(2) << "spins: " << spins;
108 for (auto& th : thds) {
109 th.Join();
110 }
111 }
112
113 typedef struct {
114 thd_args* ta;
115 size_t num_thds;
116 gpr_mu mu;
117 size_t num_done;
118 size_t spins;
119 MultiProducerSingleConsumerQueue* q;
120 gpr_event* start;
121 } pull_args;
122
pull_thread(void * arg)123 static void pull_thread(void* arg) {
124 pull_args* pa = static_cast<pull_args*>(arg);
125 gpr_event_wait(pa->start, gpr_inf_future(GPR_CLOCK_REALTIME));
126
127 for (;;) {
128 gpr_mu_lock(&pa->mu);
129 if (pa->num_done == pa->num_thds) {
130 gpr_mu_unlock(&pa->mu);
131 return;
132 }
133 MultiProducerSingleConsumerQueue::Node* n;
134 while ((n = pa->q->Pop()) == nullptr) {
135 pa->spins++;
136 }
137 test_node* tn = reinterpret_cast<test_node*>(n);
138 ASSERT_EQ(*tn->ctr, tn->i - 1);
139 *tn->ctr = tn->i;
140 if (tn->i == THREAD_ITERATIONS) pa->num_done++;
141 delete tn;
142 gpr_mu_unlock(&pa->mu);
143 }
144 }
145
TEST(MpscqTest,MtMultipop)146 TEST(MpscqTest, MtMultipop) {
147 VLOG(2) << "test_mt_multipop";
148 gpr_event start;
149 gpr_event_init(&start);
150 grpc_core::Thread thds[50];
151 grpc_core::Thread pull_thds[50];
152 thd_args ta[GPR_ARRAY_SIZE(thds)];
153 MultiProducerSingleConsumerQueue q;
154 for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
155 ta[i].ctr = 0;
156 ta[i].q = &q;
157 ta[i].start = &start;
158 thds[i] = grpc_core::Thread("grpc_multipop_test", test_thread, &ta[i]);
159 thds[i].Start();
160 }
161 pull_args pa;
162 pa.ta = ta;
163 pa.num_thds = GPR_ARRAY_SIZE(thds);
164 pa.spins = 0;
165 pa.num_done = 0;
166 pa.q = &q;
167 pa.start = &start;
168 gpr_mu_init(&pa.mu);
169 for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
170 pull_thds[i] = grpc_core::Thread("grpc_multipop_pull", pull_thread, &pa);
171 pull_thds[i].Start();
172 }
173 gpr_event_set(&start, reinterpret_cast<void*>(1));
174 for (auto& pth : pull_thds) {
175 pth.Join();
176 }
177 VLOG(2) << "spins: " << pa.spins;
178 for (auto& th : thds) {
179 th.Join();
180 }
181 gpr_mu_destroy(&pa.mu);
182 }
183
main(int argc,char ** argv)184 int main(int argc, char** argv) {
185 grpc::testing::TestEnvironment env(&argc, argv);
186 ::testing::InitGoogleTest(&argc, argv);
187 return RUN_ALL_TESTS();
188 }
189