2 * Rated submission helpers
4 * Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
12 #include "workqueue.h"
13 #include "lib/getrusage.h"
15 struct submit_worker {
19 struct flist_head work_list;
24 struct thread_data td;
29 SW_F_RUNNING = 1 << 1,
32 SW_F_ACCOUNTED = 1 << 4,
36 static struct submit_worker *__get_submit_worker(struct workqueue *wq,
39 struct submit_worker **best)
41 struct submit_worker *sw = NULL;
43 while (start <= end) {
44 sw = &wq->workers[start];
45 if (sw->flags & SW_F_IDLE)
47 if (!(*best) || sw->seq < (*best)->seq)
55 static struct submit_worker *get_submit_worker(struct workqueue *wq)
57 unsigned int next = wq->next_free_worker;
58 struct submit_worker *sw, *best = NULL;
60 assert(next < wq->max_workers);
62 sw = __get_submit_worker(wq, next, wq->max_workers - 1, &best);
64 sw = __get_submit_worker(wq, 0, next - 1, &best);
67 * No truly idle found, use best match
72 if (sw->index == wq->next_free_worker) {
73 if (sw->index + 1 < wq->max_workers)
74 wq->next_free_worker = sw->index + 1;
76 wq->next_free_worker = 0;
82 static bool all_sw_idle(struct workqueue *wq)
86 for (i = 0; i < wq->max_workers; i++) {
87 struct submit_worker *sw = &wq->workers[i];
89 if (!(sw->flags & SW_F_IDLE))
97 * Must be serialized wrt workqueue_enqueue() by caller
99 void workqueue_flush(struct workqueue *wq)
103 while (!all_sw_idle(wq)) {
104 pthread_mutex_lock(&wq->flush_lock);
105 pthread_cond_wait(&wq->flush_cond, &wq->flush_lock);
106 pthread_mutex_unlock(&wq->flush_lock);
113 * Must be serialized by caller.
115 int workqueue_enqueue(struct workqueue *wq, struct io_u *io_u)
117 struct submit_worker *sw;
119 sw = get_submit_worker(wq);
121 const enum fio_ddir ddir = acct_ddir(io_u);
122 struct thread_data *parent = wq->td;
125 parent->io_issues[ddir]++;
126 parent->io_issue_bytes[ddir] += io_u->xfer_buflen;
127 parent->rate_io_issue_bytes[ddir] += io_u->xfer_buflen;
130 pthread_mutex_lock(&sw->lock);
131 flist_add_tail(&io_u->verify_list, &sw->work_list);
132 sw->seq = ++wq->work_seq;
133 sw->flags &= ~SW_F_IDLE;
134 pthread_mutex_unlock(&sw->lock);
136 pthread_cond_signal(&sw->cond);
143 static void handle_list(struct submit_worker *sw, struct flist_head *list)
145 struct workqueue *wq = sw->wq;
148 while (!flist_empty(list)) {
149 io_u = flist_first_entry(list, struct io_u, verify_list);
150 flist_del_init(&io_u->verify_list);
151 wq->fn(&sw->td, io_u);
155 static int init_submit_worker(struct submit_worker *sw)
157 struct thread_data *parent = sw->wq->td;
158 struct thread_data *td = &sw->td;
161 memcpy(&td->o, &parent->o, sizeof(td->o));
162 memcpy(&td->ts, &parent->ts, sizeof(td->ts));
163 td->o.uid = td->o.gid = -1U;
164 dup_files(td, parent);
166 fio_options_mem_dupe(td);
168 if (ioengine_load(td))
172 td->io_ops->flags |= FIO_RAWIO;
176 INIT_FLIST_HEAD(&td->io_log_list);
177 INIT_FLIST_HEAD(&td->io_hist_list);
178 INIT_FLIST_HEAD(&td->verify_list);
179 INIT_FLIST_HEAD(&td->trim_list);
180 INIT_FLIST_HEAD(&td->next_rand_list);
181 td->io_hist_tree = RB_ROOT;
187 fio_gettime(&td->epoch, NULL);
188 fio_getrusage(&td->ru_start);
189 clear_io_state(td, 1);
191 td_set_runstate(td, TD_RUNNING);
192 td->flags |= TD_F_CHILD;
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 sum_ddir(struct thread_data *dst, struct thread_data *src,
224 pthread_mutex_lock(&dst->io_wq.stat_lock);
225 pthread_mutex_lock(&src->io_wq.stat_lock);
228 sum_val(&dst->io_bytes[ddir], &src->io_bytes[ddir]);
229 sum_val(&dst->io_blocks[ddir], &src->io_blocks[ddir]);
230 sum_val(&dst->this_io_blocks[ddir], &src->this_io_blocks[ddir]);
231 sum_val(&dst->this_io_bytes[ddir], &src->this_io_bytes[ddir]);
232 sum_val(&dst->bytes_done[ddir], &src->bytes_done[ddir]);
235 pthread_mutex_unlock(&src->io_wq.stat_lock);
236 pthread_mutex_unlock(&dst->io_wq.stat_lock);
240 static void update_accounting(struct submit_worker *sw)
242 struct thread_data *src = &sw->td;
243 struct thread_data *dst = sw->wq->td;
246 sum_ddir(dst, src, DDIR_READ);
248 sum_ddir(dst, src, DDIR_WRITE);
250 sum_ddir(dst, src, DDIR_TRIM);
253 static void *worker_thread(void *data)
255 struct submit_worker *sw = data;
256 struct workqueue *wq = sw->wq;
257 struct thread_data *td = &sw->td;
258 unsigned int eflags = 0, ret;
259 FLIST_HEAD(local_list);
261 ret = init_submit_worker(sw);
262 pthread_mutex_lock(&sw->lock);
263 sw->flags |= SW_F_RUNNING;
265 sw->flags |= SW_F_ERROR;
266 pthread_mutex_unlock(&sw->lock);
268 pthread_mutex_lock(&wq->flush_lock);
269 pthread_cond_signal(&wq->flush_cond);
270 pthread_mutex_unlock(&wq->flush_lock);
272 if (sw->flags & SW_F_ERROR)
276 pthread_mutex_lock(&sw->lock);
278 if (flist_empty(&sw->work_list)) {
279 if (sw->flags & SW_F_EXIT) {
280 pthread_mutex_unlock(&sw->lock);
284 if (td->io_u_queued || td->cur_depth ||
285 td->io_u_in_flight) {
288 pthread_mutex_unlock(&sw->lock);
289 ret = io_u_quiesce(td);
291 td->cur_depth -= ret;
292 pthread_mutex_lock(&sw->lock);
296 * We dropped and reaquired the lock, check
299 if (!flist_empty(&sw->work_list))
302 if (sw->flags & SW_F_EXIT) {
303 pthread_mutex_unlock(&sw->lock);
305 } else if (!(sw->flags & SW_F_IDLE)) {
306 sw->flags |= SW_F_IDLE;
307 wq->next_free_worker = sw->index;
309 pthread_cond_signal(&wq->flush_cond);
311 update_accounting(sw);
312 pthread_cond_wait(&sw->cond, &sw->lock);
315 flist_splice_init(&sw->work_list, &local_list);
317 pthread_mutex_unlock(&sw->lock);
318 handle_list(sw, &local_list);
321 update_accounting(sw);
324 pthread_mutex_lock(&sw->lock);
325 sw->flags |= (SW_F_EXITED | eflags);
326 pthread_mutex_unlock(&sw->lock);
330 static void free_worker(struct submit_worker *sw)
332 struct thread_data *td = &sw->td;
334 fio_options_free(td);
335 close_and_free_files(td);
338 td_set_runstate(td, TD_EXITED);
340 pthread_cond_destroy(&sw->cond);
341 pthread_mutex_destroy(&sw->lock);
344 static void shutdown_worker(struct submit_worker *sw, unsigned int *sum_cnt)
346 struct thread_data *parent = sw->wq->td;
348 pthread_join(sw->thread, NULL);
350 sum_thread_stats(&parent->ts, &sw->td.ts, *sum_cnt);
354 void workqueue_exit(struct workqueue *wq)
356 unsigned int shutdown, sum_cnt = 0;
357 struct submit_worker *sw;
360 for (i = 0; i < wq->max_workers; i++) {
361 sw = &wq->workers[i];
363 pthread_mutex_lock(&sw->lock);
364 sw->flags |= SW_F_EXIT;
365 pthread_cond_signal(&sw->cond);
366 pthread_mutex_unlock(&sw->lock);
371 for (i = 0; i < wq->max_workers; i++) {
372 sw = &wq->workers[i];
373 if (sw->flags & SW_F_ACCOUNTED)
375 sw->flags |= SW_F_ACCOUNTED;
376 shutdown_worker(sw, &sum_cnt);
379 } while (shutdown && shutdown != wq->max_workers);
382 pthread_mutex_destroy(&wq->flush_lock);
383 pthread_cond_destroy(&wq->flush_cond);
384 pthread_mutex_destroy(&wq->stat_lock);
387 static int start_worker(struct workqueue *wq, unsigned int index)
389 struct submit_worker *sw = &wq->workers[index];
392 INIT_FLIST_HEAD(&sw->work_list);
393 pthread_cond_init(&sw->cond, NULL);
394 pthread_mutex_init(&sw->lock, NULL);
398 ret = pthread_create(&sw->thread, NULL, worker_thread, sw);
400 pthread_mutex_lock(&sw->lock);
401 sw->flags = SW_F_IDLE;
402 pthread_mutex_unlock(&sw->lock);
410 int workqueue_init(struct thread_data *td, struct workqueue *wq,
411 workqueue_fn *fn, unsigned max_pending)
413 unsigned int running;
416 wq->max_workers = max_pending;
420 wq->next_free_worker = 0;
421 pthread_cond_init(&wq->flush_cond, NULL);
422 pthread_mutex_init(&wq->flush_lock, NULL);
423 pthread_mutex_init(&wq->stat_lock, NULL);
425 wq->workers = calloc(wq->max_workers, sizeof(struct submit_worker));
427 for (i = 0; i < wq->max_workers; i++)
428 if (start_worker(wq, i))
432 if (!wq->max_workers)
436 * Wait for them all to be started and initialized
440 struct submit_worker *sw;
443 pthread_mutex_lock(&wq->flush_lock);
444 for (i = 0; i < wq->max_workers; i++) {
445 sw = &wq->workers[i];
446 pthread_mutex_lock(&sw->lock);
447 if (sw->flags & SW_F_RUNNING)
449 if (sw->flags & SW_F_ERROR)
451 pthread_mutex_unlock(&sw->lock);
454 if (error || running == wq->max_workers) {
455 pthread_mutex_unlock(&wq->flush_lock);
459 pthread_cond_wait(&wq->flush_cond, &wq->flush_lock);
460 pthread_mutex_unlock(&wq->flush_lock);
467 log_err("Can't create rate workqueue\n");
468 td_verror(td, ESRCH, "workqueue_init");