2 * Rated submission helpers
4 * Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
9 #include "lib/getrusage.h"
10 #include "rate-submit.h"
12 static void check_overlap(struct io_u *io_u)
15 struct thread_data *td;
20 * Allow only one thread to check for overlap at a
21 * time to prevent two threads from thinking the coast
22 * is clear and then submitting IOs that overlap with
25 * If an overlap is found, release the lock and
26 * re-acquire it before checking again to give other
27 * threads a chance to make progress
29 * If an overlap is not found, release the lock when the
30 * io_u's IO_U_F_FLIGHT flag is set so that this io_u
31 * can be checked by other threads as they assess overlap
33 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 overlap = in_flight_overlap(&td->io_u_all, io_u);
43 pthread_mutex_unlock(&overlap_check);
50 static int io_workqueue_fn(struct submit_worker *sw,
51 struct workqueue_work *work)
53 struct io_u *io_u = container_of(work, struct io_u, work);
54 const enum fio_ddir ddir = io_u->ddir;
55 struct thread_data *td = sw->priv;
58 if (td->o.serialize_overlap)
61 dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());
63 io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
68 ret = td_io_queue(td, io_u);
69 if (ret != FIO_Q_BUSY)
71 ret = io_u_queued_complete(td, 1);
76 io_u_clear(td, io_u, IO_U_F_FLIGHT);
79 dprint(FD_RATE, "io_u %p ret %d by %u\n", io_u, ret, gettid());
81 error = io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);
83 if (ret == FIO_Q_COMPLETED)
85 else if (ret == FIO_Q_QUEUED) {
86 unsigned int min_evts;
88 if (td->o.iodepth == 1)
93 ret = io_u_queued_complete(td, min_evts);
98 if (error || td->error)
99 pthread_cond_signal(&td->parent->free_cond);
104 static bool io_workqueue_pre_sleep_flush_fn(struct submit_worker *sw)
106 struct thread_data *td = sw->priv;
110 if (td->io_u_queued || td->cur_depth || td->io_u_in_flight)
116 static void io_workqueue_pre_sleep_fn(struct submit_worker *sw)
118 struct thread_data *td = sw->priv;
121 ret = io_u_quiesce(td);
123 td->cur_depth -= ret;
126 static int io_workqueue_alloc_fn(struct submit_worker *sw)
128 struct thread_data *td;
130 td = calloc(1, sizeof(*td));
135 static void io_workqueue_free_fn(struct submit_worker *sw)
141 static int io_workqueue_init_worker_fn(struct submit_worker *sw)
143 struct thread_data *parent = sw->wq->td;
144 struct thread_data *td = sw->priv;
146 memcpy(&td->o, &parent->o, sizeof(td->o));
147 memcpy(&td->ts, &parent->ts, sizeof(td->ts));
148 td->o.uid = td->o.gid = -1U;
149 dup_files(td, parent);
151 fio_options_mem_dupe(td);
153 if (ioengine_load(td))
158 INIT_FLIST_HEAD(&td->io_log_list);
159 INIT_FLIST_HEAD(&td->io_hist_list);
160 INIT_FLIST_HEAD(&td->verify_list);
161 INIT_FLIST_HEAD(&td->trim_list);
162 td->io_hist_tree = RB_ROOT;
168 if (td->io_ops->post_init && td->io_ops->post_init(td))
171 set_epoch_time(td, td->o.log_unix_epoch);
172 fio_getrusage(&td->ru_start);
173 clear_io_state(td, 1);
175 td_set_runstate(td, TD_RUNNING);
176 td->flags |= TD_F_CHILD | TD_F_NEED_LOCK;
187 static void io_workqueue_exit_worker_fn(struct submit_worker *sw,
188 unsigned int *sum_cnt)
190 struct thread_data *td = sw->priv;
193 sum_thread_stats(&sw->wq->td->ts, &td->ts, *sum_cnt == 1);
195 fio_options_free(td);
196 close_and_free_files(td);
199 td_set_runstate(td, TD_EXITED);
203 static void sum_val(uint64_t *dst, uint64_t *src)
206 __sync_fetch_and_add(dst, *src);
211 static void sum_val(uint64_t *dst, uint64_t *src)
220 static void pthread_double_unlock(pthread_mutex_t *lock1,
221 pthread_mutex_t *lock2)
224 pthread_mutex_unlock(lock1);
225 pthread_mutex_unlock(lock2);
229 static void pthread_double_lock(pthread_mutex_t *lock1, pthread_mutex_t *lock2)
233 pthread_mutex_lock(lock1);
234 pthread_mutex_lock(lock2);
236 pthread_mutex_lock(lock2);
237 pthread_mutex_lock(lock1);
242 static void sum_ddir(struct thread_data *dst, struct thread_data *src,
245 pthread_double_lock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
247 sum_val(&dst->io_bytes[ddir], &src->io_bytes[ddir]);
248 sum_val(&dst->io_blocks[ddir], &src->io_blocks[ddir]);
249 sum_val(&dst->this_io_blocks[ddir], &src->this_io_blocks[ddir]);
250 sum_val(&dst->this_io_bytes[ddir], &src->this_io_bytes[ddir]);
251 sum_val(&dst->bytes_done[ddir], &src->bytes_done[ddir]);
253 pthread_double_unlock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
256 static void io_workqueue_update_acct_fn(struct submit_worker *sw)
258 struct thread_data *src = sw->priv;
259 struct thread_data *dst = sw->wq->td;
262 sum_ddir(dst, src, DDIR_READ);
264 sum_ddir(dst, src, DDIR_WRITE);
266 sum_ddir(dst, src, DDIR_TRIM);
270 static struct workqueue_ops rated_wq_ops = {
271 .fn = io_workqueue_fn,
272 .pre_sleep_flush_fn = io_workqueue_pre_sleep_flush_fn,
273 .pre_sleep_fn = io_workqueue_pre_sleep_fn,
274 .update_acct_fn = io_workqueue_update_acct_fn,
275 .alloc_worker_fn = io_workqueue_alloc_fn,
276 .free_worker_fn = io_workqueue_free_fn,
277 .init_worker_fn = io_workqueue_init_worker_fn,
278 .exit_worker_fn = io_workqueue_exit_worker_fn,
281 int rate_submit_init(struct thread_data *td, struct sk_out *sk_out)
283 if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
286 return workqueue_init(td, &td->io_wq, &rated_wq_ops, td->o.iodepth, sk_out);
289 void rate_submit_exit(struct thread_data *td)
291 if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
294 workqueue_exit(&td->io_wq);