| 1 | #include "qemu/osdep.h" |
| 2 | #include "qemu/aio.h" |
| 3 | #include "block/thread-pool.h" |
| 4 | #include "block/block.h" |
| 5 | #include "qapi/error.h" |
| 6 | #include "qemu/aiocb.h" |
| 7 | #include "qemu/timer.h" |
| 8 | #include "qemu/error-report.h" |
| 9 | #include "qemu/main-loop.h" |
| 10 | |
| 11 | static AioContext *ctx; |
| 12 | static int active; |
| 13 | |
| 14 | typedef struct { |
| 15 | BlockAIOCB *aiocb; |
| 16 | int n; |
| 17 | int ret; |
| 18 | } WorkerTestData; |
| 19 | |
| 20 | static int worker_cb(void *opaque) |
| 21 | { |
| 22 | WorkerTestData *data = opaque; |
| 23 | return qatomic_fetch_inc(&data->n); |
| 24 | } |
| 25 | |
| 26 | static int long_cb(void *opaque) |
| 27 | { |
| 28 | WorkerTestData *data = opaque; |
| 29 | if (qatomic_cmpxchg(&data->n, 0, 1) == 0) { |
| 30 | g_usleep(2000000); |
| 31 | qatomic_or(&data->n, 2); |
| 32 | } |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static void done_cb(void *opaque, int ret) |
| 37 | { |
| 38 | WorkerTestData *data = opaque; |
| 39 | g_assert(data->ret == -EINPROGRESS || data->ret == -ECANCELED); |
| 40 | data->ret = ret; |
| 41 | data->aiocb = NULL; |
| 42 | |
| 43 | /* Callbacks are serialized, so no need to use atomic ops. */ |
| 44 | active--; |
| 45 | } |
| 46 | |
| 47 | static void test_submit_no_complete(void) |
| 48 | { |
| 49 | WorkerTestData data = { .n = 0 }; |
| 50 | thread_pool_submit_aio(worker_cb, &data, NULL, NULL); |
| 51 | while (data.n == 0) { |
| 52 | aio_poll(ctx, true); |
| 53 | } |
| 54 | g_assert_cmpint(data.n, ==, 1); |
| 55 | } |
| 56 | |
| 57 | static void test_submit_aio(void) |
| 58 | { |
| 59 | WorkerTestData data = { .n = 0, .ret = -EINPROGRESS }; |
| 60 | data.aiocb = thread_pool_submit_aio(worker_cb, &data, |
| 61 | done_cb, &data); |
| 62 | |
| 63 | /* The callbacks are not called until after the first wait. */ |
| 64 | active = 1; |
| 65 | g_assert_cmpint(data.ret, ==, -EINPROGRESS); |
| 66 | while (data.ret == -EINPROGRESS) { |
| 67 | aio_poll(ctx, true); |
| 68 | } |
| 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 coroutine_fn 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(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 aio_poll... */ |
| 90 | } |
| 91 | |
| 92 | static void test_submit_co(void) |
| 93 | { |
| 94 | WorkerTestData data; |
| 95 | Coroutine *co = qemu_coroutine_create(co_test_cb, &data); |
| 96 | |
| 97 | qemu_coroutine_enter(co); |
| 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 | /* aio_poll will execute the rest of the coroutine. */ |
| 105 | |
| 106 | while (data.ret == -EINPROGRESS) { |
| 107 | aio_poll(ctx, true); |
| 108 | } |
| 109 | |
| 110 | /* Back here after the coroutine has finished. */ |
| 111 | |
| 112 | g_assert_cmpint(active, ==, 0); |
| 113 | g_assert_cmpint(data.ret, ==, 0); |
| 114 | } |
| 115 | |
| 116 | static void test_submit_many(void) |
| 117 | { |
| 118 | WorkerTestData data[100]; |
| 119 | int i; |
| 120 | |
| 121 | /* Start more work items than there will be threads. */ |
| 122 | for (i = 0; i < 100; i++) { |
| 123 | data[i].n = 0; |
| 124 | data[i].ret = -EINPROGRESS; |
| 125 | thread_pool_submit_aio(worker_cb, &data[i], done_cb, &data[i]); |
| 126 | } |
| 127 | |
| 128 | active = 100; |
| 129 | while (active > 0) { |
| 130 | aio_poll(ctx, true); |
| 131 | } |
| 132 | for (i = 0; i < 100; i++) { |
| 133 | g_assert_cmpint(data[i].n, ==, 1); |
| 134 | g_assert_cmpint(data[i].ret, ==, 0); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | static void do_test_cancel(bool sync) |
| 139 | { |
| 140 | WorkerTestData data[100]; |
| 141 | int num_canceled; |
| 142 | int i; |
| 143 | |
| 144 | /* Start more work items than there will be threads, to ensure |
| 145 | * the pool is full. |
| 146 | */ |
| 147 | test_submit_many(); |
| 148 | |
| 149 | /* Start long running jobs, to ensure we can cancel some. */ |
| 150 | for (i = 0; i < 100; i++) { |
| 151 | data[i].n = 0; |
| 152 | data[i].ret = -EINPROGRESS; |
| 153 | data[i].aiocb = thread_pool_submit_aio(long_cb, &data[i], |
| 154 | done_cb, &data[i]); |
| 155 | } |
| 156 | |
| 157 | /* Starting the threads may be left to a bottom half. Let it |
| 158 | * run, but do not waste too much time... |
| 159 | */ |
| 160 | active = 100; |
| 161 | aio_notify(ctx); |
| 162 | aio_poll(ctx, false); |
| 163 | |
| 164 | /* Wait some time for the threads to start, with some sanity |
| 165 | * testing on the behavior of the scheduler... |
| 166 | */ |
| 167 | g_assert_cmpint(active, ==, 100); |
| 168 | g_usleep(1000000); |
| 169 | g_assert_cmpint(active, >, 50); |
| 170 | |
| 171 | /* Cancel the jobs that haven't been started yet. */ |
| 172 | num_canceled = 0; |
| 173 | for (i = 0; i < 100; i++) { |
| 174 | if (qatomic_cmpxchg(&data[i].n, 0, 4) == 0) { |
| 175 | data[i].ret = -ECANCELED; |
| 176 | if (sync) { |
| 177 | bdrv_aio_cancel(data[i].aiocb); |
| 178 | } else { |
| 179 | bdrv_aio_cancel_async(data[i].aiocb); |
| 180 | } |
| 181 | num_canceled++; |
| 182 | } |
| 183 | } |
| 184 | g_assert_cmpint(active, >, 0); |
| 185 | g_assert_cmpint(num_canceled, <, 100); |
| 186 | |
| 187 | for (i = 0; i < 100; i++) { |
| 188 | if (data[i].aiocb && qatomic_read(&data[i].n) < 4) { |
| 189 | if (sync) { |
| 190 | /* Canceling the others will be a blocking operation. */ |
| 191 | bdrv_aio_cancel(data[i].aiocb); |
| 192 | } else { |
| 193 | bdrv_aio_cancel_async(data[i].aiocb); |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /* Finish execution and execute any remaining callbacks. */ |
| 199 | while (active > 0) { |
| 200 | aio_poll(ctx, true); |
| 201 | } |
| 202 | g_assert_cmpint(active, ==, 0); |
| 203 | for (i = 0; i < 100; i++) { |
| 204 | g_assert(data[i].aiocb == NULL); |
| 205 | switch (data[i].n) { |
| 206 | case 0: |
| 207 | fprintf(stderr, "Callback not canceled but never started?\n"); |
| 208 | abort(); |
| 209 | case 3: |
| 210 | /* Couldn't be canceled asynchronously, must have completed. */ |
| 211 | g_assert_cmpint(data[i].ret, ==, 0); |
| 212 | break; |
| 213 | case 4: |
| 214 | /* Could be canceled asynchronously, never started. */ |
| 215 | g_assert_cmpint(data[i].ret, ==, -ECANCELED); |
| 216 | break; |
| 217 | default: |
| 218 | fprintf(stderr, "Callback aborted while running?\n"); |
| 219 | abort(); |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | static void test_cancel(void) |
| 225 | { |
| 226 | do_test_cancel(true); |
| 227 | } |
| 228 | |
| 229 | static void test_cancel_async(void) |
| 230 | { |
| 231 | do_test_cancel(false); |
| 232 | } |
| 233 | |
| 234 | int main(int argc, char **argv) |
| 235 | { |
| 236 | qemu_init_main_loop(&error_abort); |
| 237 | ctx = qemu_get_current_aio_context(); |
| 238 | |
| 239 | g_test_init(&argc, &argv, NULL); |
| 240 | g_test_add_func("/thread-pool/submit-no-complete", test_submit_no_complete); |
| 241 | g_test_add_func("/thread-pool/submit-aio", test_submit_aio); |
| 242 | g_test_add_func("/thread-pool/submit-co", test_submit_co); |
| 243 | g_test_add_func("/thread-pool/submit-many", test_submit_many); |
| 244 | g_test_add_func("/thread-pool/cancel", test_cancel); |
| 245 | g_test_add_func("/thread-pool/cancel-async", test_cancel_async); |
| 246 | |
| 247 | return g_test_run(); |
| 248 | } |