2 * Rated submission helpers
4 * Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
10 #include "lib/getrusage.h"
11 #include "rate-submit.h"
13 static void check_overlap(struct io_u *io_u)
16 struct thread_data *td;
19 * Allow only one thread to check for overlap at a time to prevent two
20 * threads from thinking the coast is clear and then submitting IOs
21 * that overlap with each other.
23 * If an overlap is found, release the lock and re-acquire it before
24 * checking again to give other threads a chance to make progress.
26 * If no overlap is found, release the lock when the io_u's
27 * IO_U_F_FLIGHT flag is set so that this io_u can be checked by other
28 * threads as they assess overlap.
30 res = pthread_mutex_lock(&overlap_check);
35 if (td->runstate <= TD_SETTING_UP ||
36 td->runstate >= TD_FINISHING ||
37 !td->o.serialize_overlap ||
38 td->o.io_submit_mode != IO_MODE_OFFLOAD)
41 if (!in_flight_overlap(&td->io_u_all, io_u))
44 res = pthread_mutex_unlock(&overlap_check);
46 res = pthread_mutex_lock(&overlap_check);
52 static int io_workqueue_fn(struct submit_worker *sw,
53 struct workqueue_work *work)
55 struct io_u *io_u = container_of(work, struct io_u, work);
56 const enum fio_ddir ddir = io_u->ddir;
57 struct thread_data *td = sw->priv;
60 if (td->o.serialize_overlap)
63 dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());
65 io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
70 ret = td_io_queue(td, io_u);
71 if (ret != FIO_Q_BUSY)
73 ret = io_u_queued_complete(td, 1);
78 io_u_clear(td, io_u, IO_U_F_FLIGHT);
81 dprint(FD_RATE, "io_u %p ret %d by %u\n", io_u, ret, gettid());
83 error = io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);
85 if (ret == FIO_Q_COMPLETED)
87 else if (ret == FIO_Q_QUEUED) {
88 unsigned int min_evts;
90 if (td->o.iodepth == 1)
95 ret = io_u_queued_complete(td, min_evts);
100 if (error || td->error)
101 pthread_cond_signal(&td->parent->free_cond);
106 static bool io_workqueue_pre_sleep_flush_fn(struct submit_worker *sw)
108 struct thread_data *td = sw->priv;
112 if (td->io_u_queued || td->cur_depth || td->io_u_in_flight)
118 static void io_workqueue_pre_sleep_fn(struct submit_worker *sw)
120 struct thread_data *td = sw->priv;
123 ret = io_u_quiesce(td);
125 td->cur_depth -= ret;
128 static int io_workqueue_alloc_fn(struct submit_worker *sw)
130 struct thread_data *td;
132 td = calloc(1, sizeof(*td));
137 static void io_workqueue_free_fn(struct submit_worker *sw)
143 static int io_workqueue_init_worker_fn(struct submit_worker *sw)
145 struct thread_data *parent = sw->wq->td;
146 struct thread_data *td = sw->priv;
148 memcpy(&td->o, &parent->o, sizeof(td->o));
149 memcpy(&td->ts, &parent->ts, sizeof(td->ts));
150 td->o.uid = td->o.gid = -1U;
151 dup_files(td, parent);
153 fio_options_mem_dupe(td);
155 if (ioengine_load(td))
160 INIT_FLIST_HEAD(&td->io_log_list);
161 INIT_FLIST_HEAD(&td->io_hist_list);
162 INIT_FLIST_HEAD(&td->verify_list);
163 INIT_FLIST_HEAD(&td->trim_list);
164 td->io_hist_tree = RB_ROOT;
170 if (td->io_ops->post_init && td->io_ops->post_init(td))
173 set_epoch_time(td, td->o.log_unix_epoch);
174 fio_getrusage(&td->ru_start);
175 clear_io_state(td, 1);
177 td_set_runstate(td, TD_RUNNING);
178 td->flags |= TD_F_CHILD | TD_F_NEED_LOCK;
189 static void io_workqueue_exit_worker_fn(struct submit_worker *sw,
190 unsigned int *sum_cnt)
192 struct thread_data *td = sw->priv;
195 sum_thread_stats(&sw->wq->td->ts, &td->ts, *sum_cnt == 1);
197 fio_options_free(td);
198 close_and_free_files(td);
201 td_set_runstate(td, TD_EXITED);
205 static void sum_val(uint64_t *dst, uint64_t *src)
208 __sync_fetch_and_add(dst, *src);
213 static void sum_val(uint64_t *dst, uint64_t *src)
222 static void pthread_double_unlock(pthread_mutex_t *lock1,
223 pthread_mutex_t *lock2)
226 pthread_mutex_unlock(lock1);
227 pthread_mutex_unlock(lock2);
231 static void pthread_double_lock(pthread_mutex_t *lock1, pthread_mutex_t *lock2)
235 pthread_mutex_lock(lock1);
236 pthread_mutex_lock(lock2);
238 pthread_mutex_lock(lock2);
239 pthread_mutex_lock(lock1);
244 static void sum_ddir(struct thread_data *dst, struct thread_data *src,
247 pthread_double_lock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
249 sum_val(&dst->io_bytes[ddir], &src->io_bytes[ddir]);
250 sum_val(&dst->io_blocks[ddir], &src->io_blocks[ddir]);
251 sum_val(&dst->this_io_blocks[ddir], &src->this_io_blocks[ddir]);
252 sum_val(&dst->this_io_bytes[ddir], &src->this_io_bytes[ddir]);
253 sum_val(&dst->bytes_done[ddir], &src->bytes_done[ddir]);
255 pthread_double_unlock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
258 static void io_workqueue_update_acct_fn(struct submit_worker *sw)
260 struct thread_data *src = sw->priv;
261 struct thread_data *dst = sw->wq->td;
264 sum_ddir(dst, src, DDIR_READ);
266 sum_ddir(dst, src, DDIR_WRITE);
268 sum_ddir(dst, src, DDIR_TRIM);
272 static struct workqueue_ops rated_wq_ops = {
273 .fn = io_workqueue_fn,
274 .pre_sleep_flush_fn = io_workqueue_pre_sleep_flush_fn,
275 .pre_sleep_fn = io_workqueue_pre_sleep_fn,
276 .update_acct_fn = io_workqueue_update_acct_fn,
277 .alloc_worker_fn = io_workqueue_alloc_fn,
278 .free_worker_fn = io_workqueue_free_fn,
279 .init_worker_fn = io_workqueue_init_worker_fn,
280 .exit_worker_fn = io_workqueue_exit_worker_fn,
283 int rate_submit_init(struct thread_data *td, struct sk_out *sk_out)
285 if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
288 return workqueue_init(td, &td->io_wq, &rated_wq_ops, td->o.iodepth, sk_out);
291 void rate_submit_exit(struct thread_data *td)
293 if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
296 workqueue_exit(&td->io_wq);