11 * Change this define to play with the timeout handling
13 #undef FIO_USE_TIMEOUT
15 struct io_completion_data {
18 int error; /* output */
19 unsigned long bytes_done[2]; /* output */
20 struct timeval time; /* output */
24 * The ->file_map[] contains a map of blocks we have or have not done io
25 * to yet. Used to make sure we cover the entire range in a fair fashion.
27 static int random_map_free(struct thread_data *td, struct fio_file *f,
28 const unsigned long long block)
30 unsigned int idx = RAND_MAP_IDX(td, f, block);
31 unsigned int bit = RAND_MAP_BIT(td, f, block);
33 dprint(FD_RANDOM, "free: b=%llu, idx=%u, bit=%u\n", block, idx, bit);
35 return (f->file_map[idx] & (1UL << bit)) == 0;
39 * Mark a given offset as used in the map.
41 static void mark_random_map(struct thread_data *td, struct io_u *io_u)
43 unsigned int min_bs = td->o.rw_min_bs;
44 struct fio_file *f = io_u->file;
45 unsigned long long block;
47 unsigned int nr_blocks;
49 block = (io_u->offset - f->file_offset) / (unsigned long long) min_bs;
51 nr_blocks = (io_u->buflen + min_bs - 1) / min_bs;
53 while (blocks < nr_blocks) {
54 unsigned int idx, bit;
57 * If we have a mixed random workload, we may
58 * encounter blocks we already did IO to.
60 if ((td->o.ddir_nr == 1) && !random_map_free(td, f, block))
63 idx = RAND_MAP_IDX(td, f, block);
64 bit = RAND_MAP_BIT(td, f, block);
66 fio_assert(td, idx < f->num_maps);
68 f->file_map[idx] |= (1UL << bit);
73 if ((blocks * min_bs) < io_u->buflen)
74 io_u->buflen = blocks * min_bs;
77 static inline unsigned long long last_block(struct thread_data *td,
81 unsigned long long max_blocks;
83 max_blocks = f->io_size / (unsigned long long) td->o.min_bs[ddir];
87 return max_blocks - 1;
91 * Return the next free block in the map.
93 static int get_next_free_block(struct thread_data *td, struct fio_file *f,
94 enum fio_ddir ddir, unsigned long long *b)
96 unsigned long long min_bs = td->o.rw_min_bs;
99 i = f->last_free_lookup;
100 *b = (i * BLOCKS_PER_MAP);
101 while ((*b) * min_bs < f->real_file_size) {
102 if (f->file_map[i] != -1UL) {
103 *b += fio_ffz(f->file_map[i]);
104 if (*b > last_block(td, f, ddir))
106 f->last_free_lookup = i;
110 *b += BLOCKS_PER_MAP;
114 dprint(FD_IO, "failed finding a free block\n");
118 static int get_next_rand_offset(struct thread_data *td, struct fio_file *f,
119 enum fio_ddir ddir, unsigned long long *b)
121 unsigned long long r;
125 r = os_random_long(&td->random_state);
126 dprint(FD_RANDOM, "off rand %llu\n", r);
127 *b = (last_block(td, f, ddir) - 1)
128 * (r / ((unsigned long long) RAND_MAX + 1.0));
131 * if we are not maintaining a random map, we are done.
133 if (!file_randommap(td, f))
137 * calculate map offset and check if it's free
139 if (random_map_free(td, f, *b))
142 dprint(FD_RANDOM, "get_next_rand_offset: offset %llu busy\n",
147 * we get here, if we didn't suceed in looking up a block. generate
148 * a random start offset into the filemap, and find the first free
153 f->last_free_lookup = (f->num_maps - 1) * (r / (RAND_MAX+1.0));
154 if (!get_next_free_block(td, f, ddir, b))
157 r = os_random_long(&td->random_state);
161 * that didn't work either, try exhaustive search from the start
163 f->last_free_lookup = 0;
164 return get_next_free_block(td, f, ddir, b);
168 * For random io, generate a random new block and see if it's used. Repeat
169 * until we find a free one. For sequential io, just return the end of
170 * the last io issued.
172 static int get_next_offset(struct thread_data *td, struct io_u *io_u)
174 struct fio_file *f = io_u->file;
175 unsigned long long b;
176 enum fio_ddir ddir = io_u->ddir;
178 if (td_random(td) && (td->o.ddir_nr && !--td->ddir_nr)) {
179 td->ddir_nr = td->o.ddir_nr;
181 if (get_next_rand_offset(td, f, ddir, &b))
184 if (f->last_pos >= f->real_file_size) {
185 if (!td_random(td) ||
186 get_next_rand_offset(td, f, ddir, &b))
189 b = (f->last_pos - f->file_offset) / td->o.min_bs[ddir];
192 io_u->offset = (b * td->o.min_bs[ddir]) + f->file_offset;
193 if (io_u->offset >= f->real_file_size) {
194 dprint(FD_IO, "get_next_offset: offset %llu >= size %llu\n",
195 io_u->offset, f->real_file_size);
202 static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
204 const int ddir = io_u->ddir;
208 if (td->o.min_bs[ddir] == td->o.max_bs[ddir])
209 buflen = td->o.min_bs[ddir];
211 r = os_random_long(&td->bsrange_state);
212 if (!td->o.bssplit_nr) {
213 buflen = (unsigned int)
214 (1 + (double) (td->o.max_bs[ddir] - 1)
215 * r / (RAND_MAX + 1.0));
220 for (i = 0; i < td->o.bssplit_nr; i++) {
221 struct bssplit *bsp = &td->o.bssplit[i];
225 if (r <= ((LONG_MAX / 100L) * perc))
229 if (!td->o.bs_unaligned) {
230 buflen = (buflen + td->o.min_bs[ddir] - 1)
231 & ~(td->o.min_bs[ddir] - 1);
235 if (io_u->offset + buflen > io_u->file->real_file_size) {
236 dprint(FD_IO, "lower buflen %u -> %u (ddir=%d)\n", buflen,
237 td->o.min_bs[ddir], ddir);
238 buflen = td->o.min_bs[ddir];
244 static void set_rwmix_bytes(struct thread_data *td)
246 unsigned long issues;
250 * we do time or byte based switch. this is needed because
251 * buffered writes may issue a lot quicker than they complete,
252 * whereas reads do not.
254 issues = td->io_issues[td->rwmix_ddir] - td->rwmix_issues;
255 diff = td->o.rwmix[td->rwmix_ddir ^ 1];
257 td->rwmix_issues = td->io_issues[td->rwmix_ddir]
258 + (issues * ((100 - diff)) / diff);
261 static inline enum fio_ddir get_rand_ddir(struct thread_data *td)
266 r = os_random_long(&td->rwmix_state);
267 v = 1 + (int) (100.0 * (r / (RAND_MAX + 1.0)));
268 if (v < td->o.rwmix[DDIR_READ])
275 * Return the data direction for the next io_u. If the job is a
276 * mixed read/write workload, check the rwmix cycle and switch if
279 static enum fio_ddir get_rw_ddir(struct thread_data *td)
283 * Check if it's time to seed a new data direction.
285 if (td->io_issues[td->rwmix_ddir] >= td->rwmix_issues) {
286 unsigned long long max_bytes;
290 * Put a top limit on how many bytes we do for
291 * one data direction, to avoid overflowing the
294 ddir = get_rand_ddir(td);
295 max_bytes = td->this_io_bytes[ddir];
297 (td->o.size * td->o.rwmix[ddir] / 100)) {
298 if (!td->rw_end_set[ddir])
299 td->rw_end_set[ddir] = 1;
304 if (ddir != td->rwmix_ddir)
307 td->rwmix_ddir = ddir;
309 return td->rwmix_ddir;
310 } else if (td_read(td))
316 void put_io_u(struct thread_data *td, struct io_u *io_u)
318 assert((io_u->flags & IO_U_F_FREE) == 0);
319 io_u->flags |= IO_U_F_FREE;
322 int ret = put_file(td, io_u->file);
325 td_verror(td, ret, "file close");
329 list_del(&io_u->list);
330 list_add(&io_u->list, &td->io_u_freelist);
334 void requeue_io_u(struct thread_data *td, struct io_u **io_u)
336 struct io_u *__io_u = *io_u;
338 __io_u->flags |= IO_U_F_FREE;
339 if ((__io_u->flags & IO_U_F_FLIGHT) && (__io_u->ddir != DDIR_SYNC))
340 td->io_issues[__io_u->ddir]--;
342 __io_u->flags &= ~IO_U_F_FLIGHT;
344 list_del(&__io_u->list);
345 list_add_tail(&__io_u->list, &td->io_u_requeues);
350 static int fill_io_u(struct thread_data *td, struct io_u *io_u)
352 if (td->io_ops->flags & FIO_NOIO)
356 * see if it's time to sync
358 if (td->o.fsync_blocks &&
359 !(td->io_issues[DDIR_WRITE] % td->o.fsync_blocks) &&
360 td->io_issues[DDIR_WRITE] && should_fsync(td)) {
361 io_u->ddir = DDIR_SYNC;
365 io_u->ddir = get_rw_ddir(td);
368 * See if it's time to switch to a new zone
370 if (td->zone_bytes >= td->o.zone_size) {
372 io_u->file->last_pos += td->o.zone_skip;
373 td->io_skip_bytes += td->o.zone_skip;
377 * No log, let the seq/rand engine retrieve the next buflen and
380 if (get_next_offset(td, io_u)) {
381 dprint(FD_IO, "io_u %p, failed getting offset\n", io_u);
385 io_u->buflen = get_next_buflen(td, io_u);
387 dprint(FD_IO, "io_u %p, failed getting buflen\n", io_u);
391 if (io_u->offset + io_u->buflen > io_u->file->real_file_size) {
392 dprint(FD_IO, "io_u %p, offset too large\n", io_u);
393 dprint(FD_IO, " off=%llu/%lu > %llu\n", io_u->offset,
394 io_u->buflen, io_u->file->real_file_size);
399 * mark entry before potentially trimming io_u
401 if (td_random(td) && file_randommap(td, io_u->file))
402 mark_random_map(td, io_u);
405 * If using a write iolog, store this entry.
408 dprint_io_u(io_u, "fill_io_u");
409 td->zone_bytes += io_u->buflen;
414 void io_u_mark_depth(struct thread_data *td, struct io_u *io_u)
418 if (io_u->ddir == DDIR_SYNC)
421 switch (td->cur_depth) {
443 td->ts.io_u_map[index]++;
444 td->ts.total_io_u[io_u->ddir]++;
447 static void io_u_mark_lat_usec(struct thread_data *td, unsigned long usec)
484 assert(index < FIO_IO_U_LAT_U_NR);
485 td->ts.io_u_lat_u[index]++;
488 static void io_u_mark_lat_msec(struct thread_data *td, unsigned long msec)
529 assert(index < FIO_IO_U_LAT_M_NR);
530 td->ts.io_u_lat_m[index]++;
533 static void io_u_mark_latency(struct thread_data *td, unsigned long usec)
536 io_u_mark_lat_usec(td, usec);
538 io_u_mark_lat_msec(td, usec / 1000);
542 * Get next file to service by choosing one at random
544 static struct fio_file *get_next_file_rand(struct thread_data *td, int goodf,
551 long r = os_random_long(&td->next_file_state);
553 fno = (unsigned int) ((double) td->o.nr_files
554 * (r / (RAND_MAX + 1.0)));
556 if (f->flags & FIO_FILE_DONE)
559 if ((!goodf || (f->flags & goodf)) && !(f->flags & badf)) {
560 dprint(FD_FILE, "get_next_file_rand: %p\n", f);
567 * Get next file to service by doing round robin between all available ones
569 static struct fio_file *get_next_file_rr(struct thread_data *td, int goodf,
572 unsigned int old_next_file = td->next_file;
576 f = td->files[td->next_file];
579 if (td->next_file >= td->o.nr_files)
582 if (f->flags & FIO_FILE_DONE) {
587 if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
591 } while (td->next_file != old_next_file);
593 dprint(FD_FILE, "get_next_file_rr: %p\n", f);
597 static struct fio_file *get_next_file(struct thread_data *td)
601 assert(td->o.nr_files <= td->files_index);
603 if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files) {
604 dprint(FD_FILE, "get_next_file: nr_open=%d, nr_done=%d,"
605 " nr_files=%d\n", td->nr_open_files,
611 f = td->file_service_file;
612 if (f && (f->flags & FIO_FILE_OPEN) && td->file_service_left--)
615 if (td->o.file_service_type == FIO_FSERVICE_RR)
616 f = get_next_file_rr(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
618 f = get_next_file_rand(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
620 td->file_service_file = f;
621 td->file_service_left = td->file_service_nr - 1;
623 dprint(FD_FILE, "get_next_file: %p\n", f);
627 static struct fio_file *find_next_new_file(struct thread_data *td)
631 if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files)
634 if (td->o.file_service_type == FIO_FSERVICE_RR)
635 f = get_next_file_rr(td, 0, FIO_FILE_OPEN);
637 f = get_next_file_rand(td, 0, FIO_FILE_OPEN);
642 static int set_io_u_file(struct thread_data *td, struct io_u *io_u)
647 f = get_next_file(td);
655 if (!fill_io_u(td, io_u))
659 * td_io_close() does a put_file() as well, so no need to
663 td_io_close_file(td, f);
664 f->flags |= FIO_FILE_DONE;
668 * probably not the right place to do this, but see
669 * if we need to open a new file
671 if (td->nr_open_files < td->o.open_files &&
672 td->o.open_files != td->o.nr_files) {
673 f = find_next_new_file(td);
675 if (!f || td_io_open_file(td, f))
686 struct io_u *__get_io_u(struct thread_data *td)
688 struct io_u *io_u = NULL;
690 if (!list_empty(&td->io_u_requeues))
691 io_u = list_entry(td->io_u_requeues.next, struct io_u, list);
692 else if (!queue_full(td)) {
693 io_u = list_entry(td->io_u_freelist.next, struct io_u, list);
702 assert(io_u->flags & IO_U_F_FREE);
703 io_u->flags &= ~IO_U_F_FREE;
706 list_del(&io_u->list);
707 list_add(&io_u->list, &td->io_u_busylist);
715 * Return an io_u to be processed. Gets a buflen and offset, sets direction,
716 * etc. The returned io_u is fully ready to be prepped and submitted.
718 struct io_u *get_io_u(struct thread_data *td)
723 io_u = __get_io_u(td);
725 dprint(FD_IO, "__get_io_u failed\n");
730 * from a requeue, io_u already setup
736 * If using an iolog, grab next piece if any available.
738 if (td->o.read_iolog_file) {
739 if (read_iolog_get(td, io_u))
741 } else if (set_io_u_file(td, io_u)) {
742 dprint(FD_IO, "io_u %p, setting file failed\n", io_u);
747 assert(f->flags & FIO_FILE_OPEN);
749 if (io_u->ddir != DDIR_SYNC) {
750 if (!io_u->buflen && !(td->io_ops->flags & FIO_NOIO)) {
751 dprint(FD_IO, "get_io_u: zero buflen on %p\n", io_u);
755 f->last_pos = io_u->offset + io_u->buflen;
757 if (td->o.verify != VERIFY_NONE)
758 populate_verify_io_u(td, io_u);
762 * Set io data pointers.
764 io_u->endpos = io_u->offset + io_u->buflen;
765 io_u->xfer_buf = io_u->buf;
766 io_u->xfer_buflen = io_u->buflen;
768 if (!td_io_prep(td, io_u)) {
769 fio_gettime(&io_u->start_time, NULL);
773 dprint(FD_IO, "get_io_u failed\n");
778 void io_u_log_error(struct thread_data *td, struct io_u *io_u)
780 const char *msg[] = { "read", "write", "sync" };
782 log_err("fio: io_u error");
785 log_err(" on file %s", io_u->file->file_name);
787 log_err(": %s\n", strerror(io_u->error));
789 log_err(" %s offset=%llu, buflen=%lu\n", msg[io_u->ddir],
790 io_u->offset, io_u->xfer_buflen);
793 td_verror(td, io_u->error, "io_u error");
796 static void io_completed(struct thread_data *td, struct io_u *io_u,
797 struct io_completion_data *icd)
801 dprint_io_u(io_u, "io complete");
803 assert(io_u->flags & IO_U_F_FLIGHT);
804 io_u->flags &= ~IO_U_F_FLIGHT;
806 if (io_u->ddir == DDIR_SYNC) {
807 td->last_was_sync = 1;
811 td->last_was_sync = 0;
814 unsigned int bytes = io_u->buflen - io_u->resid;
815 const enum fio_ddir idx = io_u->ddir;
818 td->io_blocks[idx]++;
819 td->io_bytes[idx] += bytes;
820 td->this_io_bytes[idx] += bytes;
822 usec = utime_since(&io_u->issue_time, &icd->time);
824 add_clat_sample(td, idx, usec);
825 add_bw_sample(td, idx, &icd->time);
826 io_u_mark_latency(td, usec);
828 if (td_write(td) && idx == DDIR_WRITE &&
830 td->o.verify != VERIFY_NONE)
831 log_io_piece(td, io_u);
833 icd->bytes_done[idx] += bytes;
836 ret = io_u->end_io(td, io_u);
837 if (ret && !icd->error)
841 icd->error = io_u->error;
842 io_u_log_error(td, io_u);
846 static void init_icd(struct io_completion_data *icd, int nr)
848 fio_gettime(&icd->time, NULL);
853 icd->bytes_done[0] = icd->bytes_done[1] = 0;
856 static void ios_completed(struct thread_data *td,
857 struct io_completion_data *icd)
862 for (i = 0; i < icd->nr; i++) {
863 io_u = td->io_ops->event(td, i);
865 io_completed(td, io_u, icd);
871 * Complete a single io_u for the sync engines.
873 long io_u_sync_complete(struct thread_data *td, struct io_u *io_u)
875 struct io_completion_data icd;
878 io_completed(td, io_u, &icd);
882 return icd.bytes_done[0] + icd.bytes_done[1];
884 td_verror(td, icd.error, "io_u_sync_complete");
889 * Called to complete min_events number of io for the async engines.
891 long io_u_queued_complete(struct thread_data *td, int min_events)
893 struct io_completion_data icd;
894 struct timespec *tvp = NULL;
896 struct timespec ts = { .tv_sec = 0, .tv_nsec = 0, };
898 dprint(FD_IO, "io_u_queued_completed: min=%d\n", min_events);
903 ret = td_io_getevents(td, min_events, td->cur_depth, tvp);
905 td_verror(td, -ret, "td_io_getevents");
911 ios_completed(td, &icd);
913 return icd.bytes_done[0] + icd.bytes_done[1];
915 td_verror(td, icd.error, "io_u_queued_complete");
920 * Call when io_u is really queued, to update the submission latency.
922 void io_u_queued(struct thread_data *td, struct io_u *io_u)
924 unsigned long slat_time;
926 slat_time = utime_since(&io_u->start_time, &io_u->issue_time);
927 add_slat_sample(td, io_u->ddir, slat_time);
930 #ifdef FIO_USE_TIMEOUT
931 void io_u_set_timeout(struct thread_data *td)
933 assert(td->cur_depth);
935 td->timer.it_interval.tv_sec = 0;
936 td->timer.it_interval.tv_usec = 0;
937 td->timer.it_value.tv_sec = IO_U_TIMEOUT + IO_U_TIMEOUT_INC;
938 td->timer.it_value.tv_usec = 0;
939 setitimer(ITIMER_REAL, &td->timer, NULL);
940 fio_gettime(&td->timeout_end, NULL);
943 static void io_u_dump(struct io_u *io_u)
945 unsigned long t_start = mtime_since_now(&io_u->start_time);
946 unsigned long t_issue = mtime_since_now(&io_u->issue_time);
948 log_err("io_u=%p, t_start=%lu, t_issue=%lu\n", io_u, t_start, t_issue);
949 log_err(" buf=%p/%p, len=%lu/%lu, offset=%llu\n", io_u->buf,
950 io_u->xfer_buf, io_u->buflen,
953 log_err(" ddir=%d, fname=%s\n", io_u->ddir, io_u->file->file_name);
956 void io_u_set_timeout(struct thread_data fio_unused *td)
961 #ifdef FIO_USE_TIMEOUT
962 static void io_u_timeout_handler(int fio_unused sig)
964 struct thread_data *td, *__td;
965 pid_t pid = getpid();
966 struct list_head *entry;
970 log_err("fio: io_u timeout\n");
973 * TLS would be nice...
976 for_each_td(__td, i) {
977 if (__td->pid == pid) {
984 log_err("fio: io_u timeout, can't find job\n");
988 if (!td->cur_depth) {
989 log_err("fio: timeout without pending work?\n");
993 log_err("fio: io_u timeout: job=%s, pid=%d\n", td->o.name, td->pid);
995 list_for_each(entry, &td->io_u_busylist) {
996 io_u = list_entry(entry, struct io_u, list);
1001 td_verror(td, ETIMEDOUT, "io_u timeout");
1006 void io_u_init_timeout(void)
1008 #ifdef FIO_USE_TIMEOUT
1009 signal(SIGALRM, io_u_timeout_handler);