#include <glib.h> #include "qemu-common.h" #include "block/aio.h" #include "block/thread-pool.h" #include "block/block.h" #include "qemu/timer.h" #include "qemu/error-report.h" static AioContext *ctx; static ThreadPool *pool; static int active; typedef struct { BlockAIOCB *aiocb; int n; int ret; } WorkerTestData; static int worker_cb(void *opaque) { WorkerTestData *data = opaque; return atomic_fetch_inc(&data->n); } static int long_cb(void *opaque) { WorkerTestData *data = opaque; atomic_inc(&data->n); g_usleep(2000000); atomic_inc(&data->n); return 0; } static void done_cb(void *opaque, int ret) { WorkerTestData *data = opaque; g_assert(data->ret == -EINPROGRESS || data->ret == -ECANCELED); data->ret = ret; data->aiocb = NULL; /* Callbacks are serialized, so no need to use atomic ops. */ active--; } static void test_submit(void) { WorkerTestData data = { .n = 0 }; thread_pool_submit(pool, worker_cb, &data); while (data.n == 0) { aio_poll(ctx, true); } g_assert_cmpint(data.n, ==, 1); } static void test_submit_aio(void) { WorkerTestData data = { .n = 0, .ret = -EINPROGRESS }; data.aiocb = thread_pool_submit_aio(pool, worker_cb, &data, done_cb, &data); /* The callbacks are not called until after the first wait. */ active = 1; g_assert_cmpint(data.ret, ==, -EINPROGRESS); while (data.ret == -EINPROGRESS) { aio_poll(ctx, true); } g_assert_cmpint(active, ==, 0); g_assert_cmpint(data.n, ==, 1); g_assert_cmpint(data.ret, ==, 0); } static void co_test_cb(void *opaque) { WorkerTestData *data = opaque; active = 1; data->n = 0; data->ret = -EINPROGRESS; thread_pool_submit_co(pool, worker_cb, data); /* The test continues in test_submit_co, after qemu_coroutine_enter... */ g_assert_cmpint(data->n, ==, 1); data->ret = 0; active--; /* The test continues in test_submit_co, after aio_poll... */ } static void test_submit_co(void) { WorkerTestData data; Coroutine *co = qemu_coroutine_create(co_test_cb); qemu_coroutine_enter(co, &data); /* Back here once the worker has started. */ g_assert_cmpint(active, ==, 1); g_assert_cmpint(data.ret, ==, -EINPROGRESS); /* aio_poll will execute the rest of the coroutine. */ while (data.ret == -EINPROGRESS) { aio_poll(ctx, true); } /* Back here after the coroutine has finished. */ g_assert_cmpint(active, ==, 0); g_assert_cmpint(data.ret, ==, 0); } static void test_submit_many(void) { WorkerTestData data[100]; int i; /* Start more work items than there will be threads. */ for (i = 0; i < 100; i++) { data[i].n = 0; data[i].ret = -EINPROGRESS; thread_pool_submit_aio(pool, worker_cb, &data[i], done_cb, &data[i]); } active = 100; while (active > 0) { aio_poll(ctx, true); } for (i = 0; i < 100; i++) { g_assert_cmpint(data[i].n, ==, 1); g_assert_cmpint(data[i].ret, ==, 0); } } static void do_test_cancel(bool sync) { WorkerTestData data[100]; int num_canceled; int i; /* Start more work items than there will be threads, to ensure * the pool is full. */ test_submit_many(); /* Start long running jobs, to ensure we can cancel some. */ for (i = 0; i < 100; i++) { data[i].n = 0; data[i].ret = -EINPROGRESS; data[i].aiocb = thread_pool_submit_aio(pool, long_cb, &data[i], done_cb, &data[i]); } /* Starting the threads may be left to a bottom half. Let it * run, but do not waste too much time... */ active = 100; aio_notify(ctx); aio_poll(ctx, false); /* Wait some time for the threads to start, with some sanity * testing on the behavior of the scheduler... */ g_assert_cmpint(active, ==, 100); g_usleep(1000000); g_assert_cmpint(active, >, 50); /* Cancel the jobs that haven't been started yet. */ num_canceled = 0; for (i = 0; i < 100; i++) { if (atomic_cmpxchg(&data[i].n, 0, 3) == 0) { data[i].ret = -ECANCELED; if (sync) { bdrv_aio_cancel(data[i].aiocb); } else { bdrv_aio_cancel_async(data[i].aiocb); } num_canceled++; } } g_assert_cmpint(active, >, 0); g_assert_cmpint(num_canceled, <, 100); for (i = 0; i < 100; i++) { if (data[i].aiocb && data[i].n != 3) { if (sync) { /* Canceling the others will be a blocking operation. */ bdrv_aio_cancel(data[i].aiocb); } else { bdrv_aio_cancel_async(data[i].aiocb); } } } /* Finish execution and execute any remaining callbacks. */ while (active > 0) { aio_poll(ctx, true); } g_assert_cmpint(active, ==, 0); for (i = 0; i < 100; i++) { if (data[i].n == 3) { g_assert_cmpint(data[i].ret, ==, -ECANCELED); g_assert(data[i].aiocb == NULL); } else { g_assert_cmpint(data[i].n, ==, 2); g_assert(data[i].ret == 0 || data[i].ret == -ECANCELED); g_assert(data[i].aiocb == NULL); } } } static void test_cancel(void) { do_test_cancel(true); } static void test_cancel_async(void) { do_test_cancel(false); } int main(int argc, char **argv) { int ret; Error *local_error = NULL; init_clocks(); ctx = aio_context_new(&local_error); if (!ctx) { error_report("Failed to create AIO Context: '%s'", error_get_pretty(local_error)); error_free(local_error); exit(1); } pool = aio_get_thread_pool(ctx); g_test_init(&argc, &argv, NULL); g_test_add_func("/thread-pool/submit", test_submit); g_test_add_func("/thread-pool/submit-aio", test_submit_aio); g_test_add_func("/thread-pool/submit-co", test_submit_co); g_test_add_func("/thread-pool/submit-many", test_submit_many); g_test_add_func("/thread-pool/cancel", test_cancel); g_test_add_func("/thread-pool/cancel-async", test_cancel_async); ret = g_test_run(); aio_context_unref(ctx); return ret; }