trap signals for "-serial mon:stdio"
[qemu.git] / tests / test-thread-pool.c
1 #include <glib.h>
2 #include "qemu-common.h"
3 #include "block/aio.h"
4 #include "block/thread-pool.h"
5 #include "block/block.h"
6
7 static AioContext *ctx;
8 static ThreadPool *pool;
9 static int active;
10
11 typedef struct {
12 BlockDriverAIOCB *aiocb;
13 int n;
14 int ret;
15 } WorkerTestData;
16
17 static int worker_cb(void *opaque)
18 {
19 WorkerTestData *data = opaque;
20 return atomic_fetch_inc(&data->n);
21 }
22
23 static int long_cb(void *opaque)
24 {
25 WorkerTestData *data = opaque;
26 atomic_inc(&data->n);
27 g_usleep(2000000);
28 atomic_inc(&data->n);
29 return 0;
30 }
31
32 static void done_cb(void *opaque, int ret)
33 {
34 WorkerTestData *data = opaque;
35 g_assert_cmpint(data->ret, ==, -EINPROGRESS);
36 data->ret = ret;
37 data->aiocb = NULL;
38
39 /* Callbacks are serialized, so no need to use atomic ops. */
40 active--;
41 }
42
43 /* Wait until all aio and bh activity has finished */
44 static void qemu_aio_wait_all(void)
45 {
46 while (aio_poll(ctx, true)) {
47 /* Do nothing */
48 }
49 }
50
51 static void test_submit(void)
52 {
53 WorkerTestData data = { .n = 0 };
54 thread_pool_submit(pool, worker_cb, &data);
55 qemu_aio_wait_all();
56 g_assert_cmpint(data.n, ==, 1);
57 }
58
59 static void test_submit_aio(void)
60 {
61 WorkerTestData data = { .n = 0, .ret = -EINPROGRESS };
62 data.aiocb = thread_pool_submit_aio(pool, worker_cb, &data,
63 done_cb, &data);
64
65 /* The callbacks are not called until after the first wait. */
66 active = 1;
67 g_assert_cmpint(data.ret, ==, -EINPROGRESS);
68 qemu_aio_wait_all();
69 g_assert_cmpint(active, ==, 0);
70 g_assert_cmpint(data.n, ==, 1);
71 g_assert_cmpint(data.ret, ==, 0);
72 }
73
74 static void co_test_cb(void *opaque)
75 {
76 WorkerTestData *data = opaque;
77
78 active = 1;
79 data->n = 0;
80 data->ret = -EINPROGRESS;
81 thread_pool_submit_co(pool, worker_cb, data);
82
83 /* The test continues in test_submit_co, after qemu_coroutine_enter... */
84
85 g_assert_cmpint(data->n, ==, 1);
86 data->ret = 0;
87 active--;
88
89 /* The test continues in test_submit_co, after qemu_aio_wait_all... */
90 }
91
92 static void test_submit_co(void)
93 {
94 WorkerTestData data;
95 Coroutine *co = qemu_coroutine_create(co_test_cb);
96
97 qemu_coroutine_enter(co, &data);
98
99 /* Back here once the worker has started. */
100
101 g_assert_cmpint(active, ==, 1);
102 g_assert_cmpint(data.ret, ==, -EINPROGRESS);
103
104 /* qemu_aio_wait_all will execute the rest of the coroutine. */
105
106 qemu_aio_wait_all();
107
108 /* Back here after the coroutine has finished. */
109
110 g_assert_cmpint(active, ==, 0);
111 g_assert_cmpint(data.ret, ==, 0);
112 }
113
114 static void test_submit_many(void)
115 {
116 WorkerTestData data[100];
117 int i;
118
119 /* Start more work items than there will be threads. */
120 for (i = 0; i < 100; i++) {
121 data[i].n = 0;
122 data[i].ret = -EINPROGRESS;
123 thread_pool_submit_aio(pool, worker_cb, &data[i], done_cb, &data[i]);
124 }
125
126 active = 100;
127 while (active > 0) {
128 aio_poll(ctx, true);
129 }
130 for (i = 0; i < 100; i++) {
131 g_assert_cmpint(data[i].n, ==, 1);
132 g_assert_cmpint(data[i].ret, ==, 0);
133 }
134 }
135
136 static void test_cancel(void)
137 {
138 WorkerTestData data[100];
139 int num_canceled;
140 int i;
141
142 /* Start more work items than there will be threads, to ensure
143 * the pool is full.
144 */
145 test_submit_many();
146
147 /* Start long running jobs, to ensure we can cancel some. */
148 for (i = 0; i < 100; i++) {
149 data[i].n = 0;
150 data[i].ret = -EINPROGRESS;
151 data[i].aiocb = thread_pool_submit_aio(pool, long_cb, &data[i],
152 done_cb, &data[i]);
153 }
154
155 /* Starting the threads may be left to a bottom half. Let it
156 * run, but do not waste too much time...
157 */
158 active = 100;
159 aio_notify(ctx);
160 aio_poll(ctx, false);
161
162 /* Wait some time for the threads to start, with some sanity
163 * testing on the behavior of the scheduler...
164 */
165 g_assert_cmpint(active, ==, 100);
166 g_usleep(1000000);
167 g_assert_cmpint(active, >, 50);
168
169 /* Cancel the jobs that haven't been started yet. */
170 num_canceled = 0;
171 for (i = 0; i < 100; i++) {
172 if (atomic_cmpxchg(&data[i].n, 0, 3) == 0) {
173 data[i].ret = -ECANCELED;
174 bdrv_aio_cancel(data[i].aiocb);
175 active--;
176 num_canceled++;
177 }
178 }
179 g_assert_cmpint(active, >, 0);
180 g_assert_cmpint(num_canceled, <, 100);
181
182 /* Canceling the others will be a blocking operation. */
183 for (i = 0; i < 100; i++) {
184 if (data[i].n != 3) {
185 bdrv_aio_cancel(data[i].aiocb);
186 }
187 }
188
189 /* Finish execution and execute any remaining callbacks. */
190 qemu_aio_wait_all();
191 g_assert_cmpint(active, ==, 0);
192 for (i = 0; i < 100; i++) {
193 if (data[i].n == 3) {
194 g_assert_cmpint(data[i].ret, ==, -ECANCELED);
195 g_assert(data[i].aiocb != NULL);
196 } else {
197 g_assert_cmpint(data[i].n, ==, 2);
198 g_assert_cmpint(data[i].ret, ==, 0);
199 g_assert(data[i].aiocb == NULL);
200 }
201 }
202 }
203
204 int main(int argc, char **argv)
205 {
206 int ret;
207
208 ctx = aio_context_new();
209 pool = aio_get_thread_pool(ctx);
210
211 g_test_init(&argc, &argv, NULL);
212 g_test_add_func("/thread-pool/submit", test_submit);
213 g_test_add_func("/thread-pool/submit-aio", test_submit_aio);
214 g_test_add_func("/thread-pool/submit-co", test_submit_co);
215 g_test_add_func("/thread-pool/submit-many", test_submit_many);
216 g_test_add_func("/thread-pool/cancel", test_cancel);
217
218 ret = g_test_run();
219
220 aio_context_unref(ctx);
221 return ret;
222 }