#include "qemu/osdep.h"
#include "qemu-common.h"
#include "block/aio.h"
#include "block/thread-pool.h"
#include "block/block.h"
#include "qapi/error.h"
#include "qemu/timer.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.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 qatomic_fetch_inc(&data->n);
}
static int long_cb(void *opaque)
{
WorkerTestData *data = opaque;
if (qatomic_cmpxchg(&data->n, 0, 1) == 0) {
g_usleep(2000000);
qatomic_or(&data->n, 2);
}
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, &data);
qemu_coroutine_enter(co);
/* 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 (qatomic_cmpxchg(&data[i].n, 0, 4) == 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 && qatomic_read(&data[i].n) < 4) {
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++) {
g_assert(data[i].aiocb == NULL);
switch (data[i].n) {
case 0:
fprintf(stderr, "Callback not canceled but never started?\n");
abort();
case 3:
/* Couldn't be canceled asynchronously, must have completed. */
g_assert_cmpint(data[i].ret, ==, 0);
break;
case 4:
/* Could be canceled asynchronously, never started. */
g_assert_cmpint(data[i].ret, ==, -ECANCELED);
break;
default:
fprintf(stderr, "Callback aborted while running?\n");
abort();
}
}
}
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)
{
qemu_init_main_loop(&error_abort);
ctx = qemu_get_current_aio_context();
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);
return g_test_run();
}
