blob: cab09800de5afea6e1e3d749f97ef33139faca6e [file] [log] [blame]
Jens Axboe10ba5352006-10-20 11:39:27 +02001#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <signal.h>
5#include <time.h>
Jens Axboe0c6e7512007-02-22 11:19:39 +01006#include <assert.h>
Jens Axboe10ba5352006-10-20 11:39:27 +02007
8#include "fio.h"
Jens Axboe10ba5352006-10-20 11:39:27 +02009
Jens Axboe5945b9b2007-02-22 20:33:01 +010010/*
11 * Change this define to play with the timeout handling
12 */
13#undef FIO_USE_TIMEOUT
14
Jens Axboe97601022007-02-18 12:47:29 +010015struct io_completion_data {
16 int nr; /* input */
Jens Axboe97601022007-02-18 12:47:29 +010017
18 int error; /* output */
19 unsigned long bytes_done[2]; /* output */
20 struct timeval time; /* output */
21};
22
Jens Axboe10ba5352006-10-20 11:39:27 +020023/*
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.
26 */
27static int random_map_free(struct thread_data *td, struct fio_file *f,
28 unsigned long long block)
29{
30 unsigned int idx = RAND_MAP_IDX(td, f, block);
31 unsigned int bit = RAND_MAP_BIT(td, f, block);
32
33 return (f->file_map[idx] & (1UL << bit)) == 0;
34}
35
36/*
Jens Axboedf415582006-10-20 11:41:03 +020037 * Mark a given offset as used in the map.
38 */
Jens Axboe9bf20612007-03-01 09:33:57 +010039static void mark_random_map(struct thread_data *td, struct io_u *io_u)
Jens Axboedf415582006-10-20 11:41:03 +020040{
Jens Axboe2dc1bbe2007-03-15 15:01:33 +010041 unsigned int min_bs = td->o.rw_min_bs;
Jens Axboe9bf20612007-03-01 09:33:57 +010042 struct fio_file *f = io_u->file;
Jens Axboea00735e2006-11-03 08:58:08 +010043 unsigned long long block;
44 unsigned int blocks;
Jens Axboec685b5b2007-02-10 20:02:28 +010045 unsigned int nr_blocks;
Jens Axboedf415582006-10-20 11:41:03 +020046
Jens Axboea00735e2006-11-03 08:58:08 +010047 block = io_u->offset / (unsigned long long) min_bs;
48 blocks = 0;
Jens Axboec685b5b2007-02-10 20:02:28 +010049 nr_blocks = (io_u->buflen + min_bs - 1) / min_bs;
50
51 while (blocks < nr_blocks) {
Jens Axboedf415582006-10-20 11:41:03 +020052 unsigned int idx, bit;
53
Jens Axboe1e3d53a2007-03-22 19:01:48 +010054 /*
55 * If we have a mixed random workload, we may
56 * encounter blocks we already did IO to.
57 */
ljzhang,Yaxin Hu,Jianchao Tangb6a4c7d2007-07-26 10:51:46 +020058 if (!td->o.ddir_nr == 1 && !random_map_free(td, f, block))
Jens Axboedf415582006-10-20 11:41:03 +020059 break;
60
61 idx = RAND_MAP_IDX(td, f, block);
62 bit = RAND_MAP_BIT(td, f, block);
63
Jens Axboe0032bf92007-02-13 17:39:56 +010064 fio_assert(td, idx < f->num_maps);
Jens Axboedf415582006-10-20 11:41:03 +020065
66 f->file_map[idx] |= (1UL << bit);
67 block++;
68 blocks++;
69 }
70
Jens Axboea00735e2006-11-03 08:58:08 +010071 if ((blocks * min_bs) < io_u->buflen)
72 io_u->buflen = blocks * min_bs;
Jens Axboedf415582006-10-20 11:41:03 +020073}
74
75/*
Jens Axboe10ba5352006-10-20 11:39:27 +020076 * Return the next free block in the map.
77 */
78static int get_next_free_block(struct thread_data *td, struct fio_file *f,
79 unsigned long long *b)
80{
81 int i;
82
Jens Axboec685b5b2007-02-10 20:02:28 +010083 i = f->last_free_lookup;
84 *b = (i * BLOCKS_PER_MAP);
Jens Axboe2dc1bbe2007-03-15 15:01:33 +010085 while ((*b) * td->o.rw_min_bs < f->real_file_size) {
Jens Axboe10ba5352006-10-20 11:39:27 +020086 if (f->file_map[i] != -1UL) {
Jens Axboeb12ebc62007-05-21 11:42:33 +020087 *b += fio_ffz(f->file_map[i]);
Jens Axboec685b5b2007-02-10 20:02:28 +010088 f->last_free_lookup = i;
Jens Axboe10ba5352006-10-20 11:39:27 +020089 return 0;
90 }
91
92 *b += BLOCKS_PER_MAP;
93 i++;
94 }
95
96 return 1;
97}
98
Jens Axboeec4015d2007-03-23 08:04:27 +010099static int get_next_rand_offset(struct thread_data *td, struct fio_file *f,
100 int ddir, unsigned long long *b)
101{
Jens Axboe7bb48f82007-03-27 15:30:28 +0200102 unsigned long long max_blocks = f->io_size / td->o.min_bs[ddir];
Jens Axboeec4015d2007-03-23 08:04:27 +0100103 unsigned long long r, rb;
104 int loops = 5;
105
106 do {
107 r = os_random_long(&td->random_state);
108 if (!max_blocks)
109 *b = 0;
110 else
111 *b = ((max_blocks - 1) * r / (unsigned long long) (RAND_MAX+1.0));
Jens Axboe43c63a72007-05-21 13:23:30 +0200112 /*
113 * if we are not maintaining a random map, we are done.
114 */
Jens Axboeec4015d2007-03-23 08:04:27 +0100115 if (td->o.norandommap)
Jens Axboe43c63a72007-05-21 13:23:30 +0200116 return 0;
117
118 /*
119 * calculate map offset and chec if it's free
120 */
Jens Axboeec4015d2007-03-23 08:04:27 +0100121 rb = *b + (f->file_offset / td->o.min_bs[ddir]);
Jens Axboe43c63a72007-05-21 13:23:30 +0200122 if (random_map_free(td, f, rb))
123 return 0;
124
125 } while (--loops);
Jens Axboeec4015d2007-03-23 08:04:27 +0100126
127 /*
Jens Axboe43c63a72007-05-21 13:23:30 +0200128 * we get here, if we didn't suceed in looking up a block. generate
129 * a random start offset into the filemap, and find the first free
130 * block from there.
Jens Axboeec4015d2007-03-23 08:04:27 +0100131 */
Jens Axboe43c63a72007-05-21 13:23:30 +0200132 loops = 10;
133 do {
134 f->last_free_lookup = (f->num_maps - 1) * (r / (RAND_MAX+1.0));
135 if (!get_next_free_block(td, f, b))
136 return 0;
Jens Axboeec4015d2007-03-23 08:04:27 +0100137
Jens Axboe43c63a72007-05-21 13:23:30 +0200138 r = os_random_long(&td->random_state);
139 } while (--loops);
140
141 /*
142 * that didn't work either, try exhaustive search from the start
143 */
144 f->last_free_lookup = 0;
145 return get_next_free_block(td, f, b);
Jens Axboeec4015d2007-03-23 08:04:27 +0100146}
147
Jens Axboe10ba5352006-10-20 11:39:27 +0200148/*
149 * For random io, generate a random new block and see if it's used. Repeat
150 * until we find a free one. For sequential io, just return the end of
151 * the last io issued.
152 */
Jens Axboe9bf20612007-03-01 09:33:57 +0100153static int get_next_offset(struct thread_data *td, struct io_u *io_u)
Jens Axboe10ba5352006-10-20 11:39:27 +0200154{
Jens Axboe9bf20612007-03-01 09:33:57 +0100155 struct fio_file *f = io_u->file;
Jens Axboec685b5b2007-02-10 20:02:28 +0100156 const int ddir = io_u->ddir;
Jens Axboeec4015d2007-03-23 08:04:27 +0100157 unsigned long long b;
Jens Axboe10ba5352006-10-20 11:39:27 +0200158
Jens Axboeec4015d2007-03-23 08:04:27 +0100159 if (td_random(td) && (td->o.ddir_nr && !--td->ddir_nr)) {
160 td->ddir_nr = td->o.ddir_nr;
Jens Axboe10ba5352006-10-20 11:39:27 +0200161
Jens Axboeec4015d2007-03-23 08:04:27 +0100162 if (get_next_rand_offset(td, f, ddir, &b))
Jens Axboebca4ed42007-02-12 05:13:23 +0100163 return 1;
Jens Axboe43063a12007-03-27 20:21:24 +0200164 } else {
ljzhang,Yaxin Hu,Jianchao Tang0c3d7682007-07-26 10:59:25 +0200165 if (f->last_pos >= f->real_file_size) {
166 if (!td_random(td) || get_next_rand_offset(td, f, ddir, &b))
167 return 1;
ljzhang,Yaxin Hu,Jianchao Tangbcdedd02007-07-27 13:28:26 +0200168 } else
169 b = (f->last_pos - f->file_offset) / td->o.min_bs[ddir];
Jens Axboe43063a12007-03-27 20:21:24 +0200170 }
Jens Axboe10ba5352006-10-20 11:39:27 +0200171
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100172 io_u->offset = (b * td->o.min_bs[ddir]) + f->file_offset;
Jens Axboebca4ed42007-02-12 05:13:23 +0100173 if (io_u->offset >= f->real_file_size)
Jens Axboe10ba5352006-10-20 11:39:27 +0200174 return 1;
175
176 return 0;
177}
178
Jens Axboe9bf20612007-03-01 09:33:57 +0100179static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
Jens Axboe10ba5352006-10-20 11:39:27 +0200180{
Jens Axboebca4ed42007-02-12 05:13:23 +0100181 const int ddir = io_u->ddir;
Jens Axboe10ba5352006-10-20 11:39:27 +0200182 unsigned int buflen;
183 long r;
184
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100185 if (td->o.min_bs[ddir] == td->o.max_bs[ddir])
186 buflen = td->o.min_bs[ddir];
Jens Axboe10ba5352006-10-20 11:39:27 +0200187 else {
188 r = os_random_long(&td->bsrange_state);
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100189 buflen = (unsigned int) (1 + (double) (td->o.max_bs[ddir] - 1) * r / (RAND_MAX + 1.0));
190 if (!td->o.bs_unaligned)
191 buflen = (buflen + td->o.min_bs[ddir] - 1) & ~(td->o.min_bs[ddir] - 1);
Jens Axboe10ba5352006-10-20 11:39:27 +0200192 }
193
Jens Axboe6a5e6882007-07-26 10:47:51 +0200194 if (io_u->offset + buflen > io_u->file->real_file_size)
195 buflen = td->o.min_bs[ddir];
196
Jens Axboe10ba5352006-10-20 11:39:27 +0200197 return buflen;
198}
199
Jens Axboeafe24a52007-03-16 20:27:27 +0100200static void set_rwmix_bytes(struct thread_data *td)
201{
202 unsigned long long rbytes;
203 unsigned int diff;
204
205 /*
206 * we do time or byte based switch. this is needed because
207 * buffered writes may issue a lot quicker than they complete,
208 * whereas reads do not.
209 */
210 rbytes = td->io_bytes[td->rwmix_ddir] - td->rwmix_bytes;
Jens Axboee47f7992007-03-21 14:05:39 +0100211 diff = td->o.rwmix[td->rwmix_ddir ^ 1];
Jens Axboeafe24a52007-03-16 20:27:27 +0100212
Jens Axboee47f7992007-03-21 14:05:39 +0100213 td->rwmix_bytes = td->io_bytes[td->rwmix_ddir] + (rbytes * ((100 - diff)) / diff);
214}
215
216static inline enum fio_ddir get_rand_ddir(struct thread_data *td)
217{
218 unsigned int v;
219 long r;
220
221 r = os_random_long(&td->rwmix_state);
222 v = 1 + (int) (100.0 * (r / (RAND_MAX + 1.0)));
223 if (v < td->o.rwmix[DDIR_READ])
224 return DDIR_READ;
225
226 return DDIR_WRITE;
Jens Axboeafe24a52007-03-16 20:27:27 +0100227}
228
Jens Axboe10ba5352006-10-20 11:39:27 +0200229/*
230 * Return the data direction for the next io_u. If the job is a
231 * mixed read/write workload, check the rwmix cycle and switch if
232 * necessary.
233 */
Jens Axboe1e97cce2006-12-05 11:44:16 +0100234static enum fio_ddir get_rw_ddir(struct thread_data *td)
Jens Axboe10ba5352006-10-20 11:39:27 +0200235{
236 if (td_rw(td)) {
237 struct timeval now;
238 unsigned long elapsed;
Jens Axboeafe24a52007-03-16 20:27:27 +0100239 unsigned int cycle;
Jens Axboe10ba5352006-10-20 11:39:27 +0200240
Jens Axboe02bcaa82006-11-24 10:42:00 +0100241 fio_gettime(&now, NULL);
Jens Axboe10ba5352006-10-20 11:39:27 +0200242 elapsed = mtime_since_now(&td->rwmix_switch);
243
Jens Axboee47f7992007-03-21 14:05:39 +0100244 /*
245 * if this is the first cycle, make it shorter
246 */
Jens Axboeafe24a52007-03-16 20:27:27 +0100247 cycle = td->o.rwmixcycle;
248 if (!td->rwmix_bytes)
249 cycle /= 10;
250
Jens Axboe10ba5352006-10-20 11:39:27 +0200251 /*
252 * Check if it's time to seed a new data direction.
253 */
Jens Axboee47f7992007-03-21 14:05:39 +0100254 if (elapsed >= cycle ||
Jens Axboeafe24a52007-03-16 20:27:27 +0100255 td->io_bytes[td->rwmix_ddir] >= td->rwmix_bytes) {
Jens Axboee47f7992007-03-21 14:05:39 +0100256 unsigned long long max_bytes;
257 enum fio_ddir ddir;
Jens Axboe10ba5352006-10-20 11:39:27 +0200258
Jens Axboee47f7992007-03-21 14:05:39 +0100259 /*
260 * Put a top limit on how many bytes we do for
261 * one data direction, to avoid overflowing the
262 * ranges too much
263 */
264 ddir = get_rand_ddir(td);
265 max_bytes = td->this_io_bytes[ddir];
Jens Axboe7bb48f82007-03-27 15:30:28 +0200266 if (max_bytes >= (td->o.size * td->o.rwmix[ddir] / 100)) {
Jens Axboe38d77ca2007-03-21 14:20:20 +0100267 if (!td->rw_end_set[ddir]) {
268 td->rw_end_set[ddir] = 1;
269 memcpy(&td->rw_end[ddir], &now, sizeof(now));
270 }
Jens Axboee47f7992007-03-21 14:05:39 +0100271 ddir ^= 1;
Jens Axboe38d77ca2007-03-21 14:20:20 +0100272 }
Jens Axboee47f7992007-03-21 14:05:39 +0100273
274 if (ddir != td->rwmix_ddir)
275 set_rwmix_bytes(td);
276
277 td->rwmix_ddir = ddir;
Jens Axboe10ba5352006-10-20 11:39:27 +0200278 memcpy(&td->rwmix_switch, &now, sizeof(now));
279 }
280 return td->rwmix_ddir;
281 } else if (td_read(td))
282 return DDIR_READ;
283 else
284 return DDIR_WRITE;
285}
286
Jens Axboe10ba5352006-10-20 11:39:27 +0200287void put_io_u(struct thread_data *td, struct io_u *io_u)
288{
Jens Axboe0c6e7512007-02-22 11:19:39 +0100289 assert((io_u->flags & IO_U_F_FREE) == 0);
290 io_u->flags |= IO_U_F_FREE;
291
Jens Axboe2dbdab72007-04-26 10:21:15 +0200292 if (io_u->file)
293 put_file(td, io_u->file);
294
Jens Axboe10ba5352006-10-20 11:39:27 +0200295 io_u->file = NULL;
296 list_del(&io_u->list);
297 list_add(&io_u->list, &td->io_u_freelist);
298 td->cur_depth--;
299}
300
Jens Axboe755200a2007-02-19 13:08:12 +0100301void requeue_io_u(struct thread_data *td, struct io_u **io_u)
302{
303 struct io_u *__io_u = *io_u;
304
Jens Axboe4d2e0f42007-02-24 13:31:57 +0100305 __io_u->flags |= IO_U_F_FREE;
306 __io_u->flags &= ~IO_U_F_FLIGHT;
307
Jens Axboe755200a2007-02-19 13:08:12 +0100308 list_del(&__io_u->list);
309 list_add_tail(&__io_u->list, &td->io_u_requeues);
310 td->cur_depth--;
311 *io_u = NULL;
312}
313
Jens Axboe9bf20612007-03-01 09:33:57 +0100314static int fill_io_u(struct thread_data *td, struct io_u *io_u)
Jens Axboe10ba5352006-10-20 11:39:27 +0200315{
Jens Axboeb4c5e1a2007-10-25 18:44:45 +0200316 if (td->io_ops->flags & FIO_NOIO)
317 goto out;
318
Jens Axboe10ba5352006-10-20 11:39:27 +0200319 /*
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200320 * see if it's time to sync
321 */
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100322 if (td->o.fsync_blocks &&
323 !(td->io_issues[DDIR_WRITE] % td->o.fsync_blocks) &&
324 td->io_issues[DDIR_WRITE] && should_fsync(td)) {
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200325 io_u->ddir = DDIR_SYNC;
Jens Axboec38e9462007-03-27 08:48:48 +0200326 goto out;
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200327 }
328
Jens Axboea00735e2006-11-03 08:58:08 +0100329 io_u->ddir = get_rw_ddir(td);
330
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200331 /*
Jens Axboe48f5abd2007-07-20 13:25:04 +0200332 * See if it's time to switch to a new zone
333 */
334 if (td->zone_bytes >= td->o.zone_size) {
335 td->zone_bytes = 0;
336 io_u->file->last_pos += td->o.zone_skip;
337 td->io_skip_bytes += td->o.zone_skip;
338 }
339
340 /*
Jens Axboec685b5b2007-02-10 20:02:28 +0100341 * No log, let the seq/rand engine retrieve the next buflen and
342 * position.
Jens Axboe10ba5352006-10-20 11:39:27 +0200343 */
Jens Axboe9bf20612007-03-01 09:33:57 +0100344 if (get_next_offset(td, io_u))
Jens Axboebca4ed42007-02-12 05:13:23 +0100345 return 1;
Jens Axboec685b5b2007-02-10 20:02:28 +0100346
Jens Axboe9bf20612007-03-01 09:33:57 +0100347 io_u->buflen = get_next_buflen(td, io_u);
Jens Axboebca4ed42007-02-12 05:13:23 +0100348 if (!io_u->buflen)
349 return 1;
Jens Axboe10ba5352006-10-20 11:39:27 +0200350
Jens Axboe6a5e6882007-07-26 10:47:51 +0200351 if (io_u->offset + io_u->buflen > io_u->file->real_file_size)
352 return 1;
353
Jens Axboebca4ed42007-02-12 05:13:23 +0100354 /*
355 * mark entry before potentially trimming io_u
356 */
Jens Axboe8fd15a92007-03-27 08:46:33 +0200357 if (td_random(td) && !td->o.norandommap)
Jens Axboe9bf20612007-03-01 09:33:57 +0100358 mark_random_map(td, io_u);
Jens Axboe10ba5352006-10-20 11:39:27 +0200359
Jens Axboebca4ed42007-02-12 05:13:23 +0100360 /*
361 * If using a write iolog, store this entry.
362 */
Jens Axboec38e9462007-03-27 08:48:48 +0200363out:
Jens Axboef29b25a2007-07-23 08:56:43 +0200364 log_io_u(td, io_u);
Jens Axboebca4ed42007-02-12 05:13:23 +0100365 return 0;
Jens Axboe10ba5352006-10-20 11:39:27 +0200366}
367
Jens Axboeb3605062007-03-12 14:19:47 +0100368void io_u_mark_depth(struct thread_data *td, struct io_u *io_u)
Jens Axboe71619dc2007-01-13 23:56:33 +0100369{
370 int index = 0;
371
Jens Axboeb3605062007-03-12 14:19:47 +0100372 if (io_u->ddir == DDIR_SYNC)
373 return;
374
Jens Axboe71619dc2007-01-13 23:56:33 +0100375 switch (td->cur_depth) {
376 default:
Jens Axboea783e612007-06-19 09:50:28 +0200377 index = 6;
378 break;
Jens Axboe71619dc2007-01-13 23:56:33 +0100379 case 32 ... 63:
Jens Axboea783e612007-06-19 09:50:28 +0200380 index = 5;
381 break;
Jens Axboe71619dc2007-01-13 23:56:33 +0100382 case 16 ... 31:
Jens Axboea783e612007-06-19 09:50:28 +0200383 index = 4;
384 break;
Jens Axboe71619dc2007-01-13 23:56:33 +0100385 case 8 ... 15:
Jens Axboea783e612007-06-19 09:50:28 +0200386 index = 3;
387 break;
Jens Axboe71619dc2007-01-13 23:56:33 +0100388 case 4 ... 7:
Jens Axboea783e612007-06-19 09:50:28 +0200389 index = 2;
390 break;
Jens Axboe71619dc2007-01-13 23:56:33 +0100391 case 2 ... 3:
Jens Axboea783e612007-06-19 09:50:28 +0200392 index = 1;
Jens Axboe71619dc2007-01-13 23:56:33 +0100393 case 1:
394 break;
395 }
396
Jens Axboe756867b2007-03-06 15:19:24 +0100397 td->ts.io_u_map[index]++;
Jens Axboeb3605062007-03-12 14:19:47 +0100398 td->ts.total_io_u[io_u->ddir]++;
Jens Axboe71619dc2007-01-13 23:56:33 +0100399}
400
Jens Axboe04a0fea2007-06-19 12:48:41 +0200401static void io_u_mark_lat_usec(struct thread_data *td, unsigned long usec)
402{
403 int index = 0;
404
405 assert(usec < 1000);
406
407 switch (usec) {
408 case 750 ... 999:
409 index = 9;
410 break;
411 case 500 ... 749:
412 index = 8;
413 break;
414 case 250 ... 499:
415 index = 7;
416 break;
417 case 100 ... 249:
418 index = 6;
419 break;
420 case 50 ... 99:
421 index = 5;
422 break;
423 case 20 ... 49:
424 index = 4;
425 break;
426 case 10 ... 19:
427 index = 3;
428 break;
429 case 4 ... 9:
430 index = 2;
431 break;
432 case 2 ... 3:
433 index = 1;
434 case 0 ... 1:
435 break;
436 }
437
438 assert(index < FIO_IO_U_LAT_U_NR);
439 td->ts.io_u_lat_u[index]++;
440}
441
442static void io_u_mark_lat_msec(struct thread_data *td, unsigned long msec)
Jens Axboeec118302007-02-17 04:38:20 +0100443{
444 int index = 0;
445
446 switch (msec) {
447 default:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200448 index = 11;
449 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100450 case 1000 ... 1999:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200451 index = 10;
452 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100453 case 750 ... 999:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200454 index = 9;
455 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100456 case 500 ... 749:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200457 index = 8;
458 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100459 case 250 ... 499:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200460 index = 7;
461 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100462 case 100 ... 249:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200463 index = 6;
464 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100465 case 50 ... 99:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200466 index = 5;
467 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100468 case 20 ... 49:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200469 index = 4;
470 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100471 case 10 ... 19:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200472 index = 3;
473 break;
Jens Axboe8abdce62007-02-21 10:22:55 +0100474 case 4 ... 9:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200475 index = 2;
476 break;
Jens Axboeec118302007-02-17 04:38:20 +0100477 case 2 ... 3:
Jens Axboe04a0fea2007-06-19 12:48:41 +0200478 index = 1;
Jens Axboeec118302007-02-17 04:38:20 +0100479 case 0 ... 1:
480 break;
481 }
482
Jens Axboe04a0fea2007-06-19 12:48:41 +0200483 assert(index < FIO_IO_U_LAT_M_NR);
484 td->ts.io_u_lat_m[index]++;
485}
486
487static void io_u_mark_latency(struct thread_data *td, unsigned long usec)
488{
489 if (usec < 1000)
490 io_u_mark_lat_usec(td, usec);
491 else
492 io_u_mark_lat_msec(td, usec / 1000);
Jens Axboeec118302007-02-17 04:38:20 +0100493}
494
Jens Axboe0aabe162007-02-23 08:45:55 +0100495/*
496 * Get next file to service by choosing one at random
497 */
Jens Axboe1c178182007-03-13 13:25:18 +0100498static struct fio_file *get_next_file_rand(struct thread_data *td, int goodf,
499 int badf)
Jens Axboe0aabe162007-02-23 08:45:55 +0100500{
Jens Axboe0aabe162007-02-23 08:45:55 +0100501 struct fio_file *f;
Jens Axboe1c178182007-03-13 13:25:18 +0100502 int fno;
Jens Axboe0aabe162007-02-23 08:45:55 +0100503
504 do {
Jens Axboe7c83c082007-03-01 10:04:15 +0100505 long r = os_random_long(&td->next_file_state);
506
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100507 fno = (unsigned int) ((double) td->o.nr_files * (r / (RAND_MAX + 1.0)));
Jens Axboe1c178182007-03-13 13:25:18 +0100508 f = &td->files[fno];
Jens Axboe059e63c2007-03-27 20:34:47 +0200509 if (f->flags & FIO_FILE_DONE)
510 continue;
Jens Axboe1c178182007-03-13 13:25:18 +0100511
512 if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
Jens Axboe0aabe162007-02-23 08:45:55 +0100513 return f;
514 } while (1);
515}
516
517/*
518 * Get next file to service by doing round robin between all available ones
519 */
Jens Axboe1c178182007-03-13 13:25:18 +0100520static struct fio_file *get_next_file_rr(struct thread_data *td, int goodf,
521 int badf)
Jens Axboe3d7c3912007-02-19 13:16:12 +0100522{
523 unsigned int old_next_file = td->next_file;
524 struct fio_file *f;
525
526 do {
527 f = &td->files[td->next_file];
528
529 td->next_file++;
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100530 if (td->next_file >= td->o.nr_files)
Jens Axboe3d7c3912007-02-19 13:16:12 +0100531 td->next_file = 0;
532
Jens Axboed5ed68e2007-03-28 09:33:43 +0200533 if (f->flags & FIO_FILE_DONE) {
534 f = NULL;
Jens Axboe059e63c2007-03-27 20:34:47 +0200535 continue;
Jens Axboed5ed68e2007-03-28 09:33:43 +0200536 }
Jens Axboe059e63c2007-03-27 20:34:47 +0200537
Jens Axboe1c178182007-03-13 13:25:18 +0100538 if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
Jens Axboe3d7c3912007-02-19 13:16:12 +0100539 break;
540
541 f = NULL;
542 } while (td->next_file != old_next_file);
543
544 return f;
545}
546
Jens Axboebdb4e2e2007-03-01 09:54:57 +0100547static struct fio_file *get_next_file(struct thread_data *td)
548{
Jens Axboe1907dbc2007-03-12 11:44:28 +0100549 struct fio_file *f;
550
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100551 assert(td->o.nr_files <= td->files_index);
Jens Axboe1c178182007-03-13 13:25:18 +0100552
Jens Axboe1020a132007-03-29 11:15:06 +0200553 if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files)
Jens Axboebdb4e2e2007-03-01 09:54:57 +0100554 return NULL;
555
Jens Axboe1907dbc2007-03-12 11:44:28 +0100556 f = td->file_service_file;
Jens Axboef11bd942007-03-13 10:16:34 +0100557 if (f && (f->flags & FIO_FILE_OPEN) && td->file_service_left--)
Jens Axboe1907dbc2007-03-12 11:44:28 +0100558 return f;
559
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100560 if (td->o.file_service_type == FIO_FSERVICE_RR)
Jens Axboe1c178182007-03-13 13:25:18 +0100561 f = get_next_file_rr(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
Jens Axboebdb4e2e2007-03-01 09:54:57 +0100562 else
Jens Axboe1c178182007-03-13 13:25:18 +0100563 f = get_next_file_rand(td, FIO_FILE_OPEN, FIO_FILE_CLOSING);
Jens Axboe1907dbc2007-03-12 11:44:28 +0100564
565 td->file_service_file = f;
566 td->file_service_left = td->file_service_nr - 1;
567 return f;
Jens Axboebdb4e2e2007-03-01 09:54:57 +0100568}
569
Jens Axboe1c178182007-03-13 13:25:18 +0100570static struct fio_file *find_next_new_file(struct thread_data *td)
571{
572 struct fio_file *f;
573
Jens Axboe1020a132007-03-29 11:15:06 +0200574 if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files)
575 return NULL;
576
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100577 if (td->o.file_service_type == FIO_FSERVICE_RR)
Jens Axboe1c178182007-03-13 13:25:18 +0100578 f = get_next_file_rr(td, 0, FIO_FILE_OPEN);
579 else
580 f = get_next_file_rand(td, 0, FIO_FILE_OPEN);
581
582 return f;
583}
584
Jens Axboe429f6672007-07-23 10:38:43 +0200585static int set_io_u_file(struct thread_data *td, struct io_u *io_u)
586{
587 struct fio_file *f;
588
589 do {
590 f = get_next_file(td);
591 if (!f)
592 return 1;
593
594set_file:
595 io_u->file = f;
596 get_file(f);
597
598 if (!fill_io_u(td, io_u))
599 break;
600
601 /*
602 * td_io_close() does a put_file() as well, so no need to
603 * do that here.
604 */
605 io_u->file = NULL;
606 td_io_close_file(td, f);
607 f->flags |= FIO_FILE_DONE;
608 td->nr_done_files++;
609
610 /*
611 * probably not the right place to do this, but see
612 * if we need to open a new file
613 */
614 if (td->nr_open_files < td->o.open_files &&
615 td->o.open_files != td->o.nr_files) {
616 f = find_next_new_file(td);
617
618 if (!f || td_io_open_file(td, f))
619 return 1;
620
621 goto set_file;
622 }
623 } while (1);
624
625 return 0;
626}
627
628
Jens Axboe10ba5352006-10-20 11:39:27 +0200629struct io_u *__get_io_u(struct thread_data *td)
630{
631 struct io_u *io_u = NULL;
632
Jens Axboe755200a2007-02-19 13:08:12 +0100633 if (!list_empty(&td->io_u_requeues))
634 io_u = list_entry(td->io_u_requeues.next, struct io_u, list);
635 else if (!queue_full(td)) {
Jens Axboe10ba5352006-10-20 11:39:27 +0200636 io_u = list_entry(td->io_u_freelist.next, struct io_u, list);
637
Jens Axboe6040dab2006-10-24 19:38:15 +0200638 io_u->buflen = 0;
Jens Axboe10ba5352006-10-20 11:39:27 +0200639 io_u->resid = 0;
Jens Axboe755200a2007-02-19 13:08:12 +0100640 io_u->file = NULL;
Jens Axboed7762cf2007-02-23 12:34:57 +0100641 io_u->end_io = NULL;
Jens Axboe755200a2007-02-19 13:08:12 +0100642 }
643
644 if (io_u) {
Jens Axboe0c6e7512007-02-22 11:19:39 +0100645 assert(io_u->flags & IO_U_F_FREE);
646 io_u->flags &= ~IO_U_F_FREE;
647
Jens Axboe755200a2007-02-19 13:08:12 +0100648 io_u->error = 0;
Jens Axboe10ba5352006-10-20 11:39:27 +0200649 list_del(&io_u->list);
650 list_add(&io_u->list, &td->io_u_busylist);
651 td->cur_depth++;
652 }
653
654 return io_u;
655}
656
657/*
658 * Return an io_u to be processed. Gets a buflen and offset, sets direction,
659 * etc. The returned io_u is fully ready to be prepped and submitted.
660 */
Jens Axboe3d7c3912007-02-19 13:16:12 +0100661struct io_u *get_io_u(struct thread_data *td)
Jens Axboe10ba5352006-10-20 11:39:27 +0200662{
Jens Axboe3d7c3912007-02-19 13:16:12 +0100663 struct fio_file *f;
Jens Axboe10ba5352006-10-20 11:39:27 +0200664 struct io_u *io_u;
665
666 io_u = __get_io_u(td);
667 if (!io_u)
668 return NULL;
669
Jens Axboe755200a2007-02-19 13:08:12 +0100670 /*
671 * from a requeue, io_u already setup
672 */
673 if (io_u->file)
Jens Axboe77f392b2007-02-19 20:13:09 +0100674 goto out;
Jens Axboe755200a2007-02-19 13:08:12 +0100675
Jens Axboe429f6672007-07-23 10:38:43 +0200676 /*
677 * If using an iolog, grab next piece if any available.
678 */
679 if (td->o.read_iolog_file) {
680 if (read_iolog_get(td, io_u))
681 goto err_put;
682 } else if (set_io_u_file(td, io_u))
683 goto err_put;
684
685 f = io_u->file;
686 assert(f->flags & FIO_FILE_OPEN);
Jens Axboe97af62c2007-05-22 11:12:13 +0200687
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200688 if (io_u->ddir != DDIR_SYNC) {
Jens Axboe429f6672007-07-23 10:38:43 +0200689 if (!io_u->buflen)
690 goto err_put;
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200691
Jens Axboe36167d82007-02-18 05:41:31 +0100692 f->last_pos = io_u->offset + io_u->buflen;
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200693
Jens Axboe2dc1bbe2007-03-15 15:01:33 +0100694 if (td->o.verify != VERIFY_NONE)
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200695 populate_verify_io_u(td, io_u);
Jens Axboe10ba5352006-10-20 11:39:27 +0200696 }
697
Jens Axboe165faf12007-02-07 11:30:37 +0100698 /*
699 * Set io data pointers.
700 */
Jens Axboed460eb32007-04-16 21:39:33 +0200701 io_u->endpos = io_u->offset + io_u->buflen;
Jens Axboe77f392b2007-02-19 20:13:09 +0100702out:
Jens Axboecec6b552007-02-06 20:15:38 +0100703 io_u->xfer_buf = io_u->buf;
704 io_u->xfer_buflen = io_u->buflen;
Jens Axboe165faf12007-02-07 11:30:37 +0100705
Jens Axboe429f6672007-07-23 10:38:43 +0200706 if (!td_io_prep(td, io_u)) {
707 fio_gettime(&io_u->start_time, NULL);
708 return io_u;
Jens Axboe36167d82007-02-18 05:41:31 +0100709 }
Jens Axboe429f6672007-07-23 10:38:43 +0200710err_put:
711 put_io_u(td, io_u);
712 return NULL;
Jens Axboe10ba5352006-10-20 11:39:27 +0200713}
714
Jens Axboe54517922007-03-05 10:06:06 +0100715void io_u_log_error(struct thread_data *td, struct io_u *io_u)
716{
717 const char *msg[] = { "read", "write", "sync" };
718
719 log_err("fio: io_u error");
720
721 if (io_u->file)
722 log_err(" on file %s", io_u->file->file_name);
723
724 log_err(": %s\n", strerror(io_u->error));
725
726 log_err(" %s offset=%llu, buflen=%lu\n", msg[io_u->ddir], io_u->offset, io_u->xfer_buflen);
727
728 if (!td->error)
729 td_verror(td, io_u->error, "io_u error");
730}
731
Jens Axboe97601022007-02-18 12:47:29 +0100732static void io_completed(struct thread_data *td, struct io_u *io_u,
733 struct io_completion_data *icd)
Jens Axboe10ba5352006-10-20 11:39:27 +0200734{
Jens Axboed85f5112007-06-18 09:41:23 +0200735 unsigned long usec;
Jens Axboe10ba5352006-10-20 11:39:27 +0200736
Jens Axboe0c6e7512007-02-22 11:19:39 +0100737 assert(io_u->flags & IO_U_F_FLIGHT);
738 io_u->flags &= ~IO_U_F_FLIGHT;
739
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200740 if (io_u->ddir == DDIR_SYNC) {
741 td->last_was_sync = 1;
742 return;
743 }
744
745 td->last_was_sync = 0;
746
Jens Axboe10ba5352006-10-20 11:39:27 +0200747 if (!io_u->error) {
748 unsigned int bytes = io_u->buflen - io_u->resid;
Jens Axboe1e97cce2006-12-05 11:44:16 +0100749 const enum fio_ddir idx = io_u->ddir;
Jens Axboe3af6ef32007-02-18 06:57:43 +0100750 int ret;
Jens Axboe10ba5352006-10-20 11:39:27 +0200751
752 td->io_blocks[idx]++;
753 td->io_bytes[idx] += bytes;
754 td->zone_bytes += bytes;
755 td->this_io_bytes[idx] += bytes;
756
Jens Axboed460eb32007-04-16 21:39:33 +0200757 io_u->file->last_completed_pos = io_u->endpos;
Jens Axboe02bcaa82006-11-24 10:42:00 +0100758
Jens Axboed85f5112007-06-18 09:41:23 +0200759 usec = utime_since(&io_u->issue_time, &icd->time);
Jens Axboe10ba5352006-10-20 11:39:27 +0200760
Jens Axboed85f5112007-06-18 09:41:23 +0200761 add_clat_sample(td, idx, usec);
Jens Axboe02bcaa82006-11-24 10:42:00 +0100762 add_bw_sample(td, idx, &icd->time);
Jens Axboe04a0fea2007-06-19 12:48:41 +0200763 io_u_mark_latency(td, usec);
Jens Axboe10ba5352006-10-20 11:39:27 +0200764
Jens Axboe660a1cb2007-04-17 15:37:47 +0200765 if (td_write(td) && idx == DDIR_WRITE &&
Jens Axboe41128402007-03-27 08:32:48 +0200766 td->o.verify != VERIFY_NONE)
Jens Axboe10ba5352006-10-20 11:39:27 +0200767 log_io_piece(td, io_u);
768
769 icd->bytes_done[idx] += bytes;
Jens Axboe3af6ef32007-02-18 06:57:43 +0100770
Jens Axboed7762cf2007-02-23 12:34:57 +0100771 if (io_u->end_io) {
Jens Axboe36690c92007-03-26 10:23:34 +0200772 ret = io_u->end_io(td, io_u);
Jens Axboe3af6ef32007-02-18 06:57:43 +0100773 if (ret && !icd->error)
774 icd->error = ret;
775 }
Jens Axboe54517922007-03-05 10:06:06 +0100776 } else {
Jens Axboe10ba5352006-10-20 11:39:27 +0200777 icd->error = io_u->error;
Jens Axboe54517922007-03-05 10:06:06 +0100778 io_u_log_error(td, io_u);
779 }
Jens Axboe10ba5352006-10-20 11:39:27 +0200780}
781
Jens Axboed7762cf2007-02-23 12:34:57 +0100782static void init_icd(struct io_completion_data *icd, int nr)
Jens Axboe36167d82007-02-18 05:41:31 +0100783{
784 fio_gettime(&icd->time, NULL);
785
Jens Axboe3af6ef32007-02-18 06:57:43 +0100786 icd->nr = nr;
787
Jens Axboe36167d82007-02-18 05:41:31 +0100788 icd->error = 0;
789 icd->bytes_done[0] = icd->bytes_done[1] = 0;
790}
791
Jens Axboe97601022007-02-18 12:47:29 +0100792static void ios_completed(struct thread_data *td,
793 struct io_completion_data *icd)
Jens Axboe10ba5352006-10-20 11:39:27 +0200794{
795 struct io_u *io_u;
796 int i;
797
Jens Axboe10ba5352006-10-20 11:39:27 +0200798 for (i = 0; i < icd->nr; i++) {
799 io_u = td->io_ops->event(td, i);
800
801 io_completed(td, io_u, icd);
802 put_io_u(td, io_u);
803 }
804}
Jens Axboe97601022007-02-18 12:47:29 +0100805
Jens Axboee7e6cfb2007-02-20 10:58:34 +0100806/*
807 * Complete a single io_u for the sync engines.
808 */
Jens Axboed7762cf2007-02-23 12:34:57 +0100809long io_u_sync_complete(struct thread_data *td, struct io_u *io_u)
Jens Axboe97601022007-02-18 12:47:29 +0100810{
811 struct io_completion_data icd;
812
Jens Axboed7762cf2007-02-23 12:34:57 +0100813 init_icd(&icd, 1);
Jens Axboe97601022007-02-18 12:47:29 +0100814 io_completed(td, io_u, &icd);
815 put_io_u(td, io_u);
816
817 if (!icd.error)
818 return icd.bytes_done[0] + icd.bytes_done[1];
819
Jens Axboe37e974a2007-03-02 15:16:45 +0100820 td_verror(td, icd.error, "io_u_sync_complete");
Jens Axboe97601022007-02-18 12:47:29 +0100821 return -1;
822}
823
Jens Axboee7e6cfb2007-02-20 10:58:34 +0100824/*
825 * Called to complete min_events number of io for the async engines.
826 */
Jens Axboed7762cf2007-02-23 12:34:57 +0100827long io_u_queued_complete(struct thread_data *td, int min_events)
Jens Axboe97601022007-02-18 12:47:29 +0100828{
Jens Axboe97601022007-02-18 12:47:29 +0100829 struct io_completion_data icd;
Jens Axboe00de55e2007-02-20 10:45:57 +0100830 struct timespec *tvp = NULL;
Jens Axboe97601022007-02-18 12:47:29 +0100831 int ret;
Davide Libenzi4d06a332007-03-22 07:43:50 +0100832 struct timespec ts = { .tv_sec = 0, .tv_nsec = 0, };
Jens Axboe97601022007-02-18 12:47:29 +0100833
Davide Libenzi4d06a332007-03-22 07:43:50 +0100834 if (!min_events)
Jens Axboe00de55e2007-02-20 10:45:57 +0100835 tvp = &ts;
Jens Axboe97601022007-02-18 12:47:29 +0100836
Jens Axboe00de55e2007-02-20 10:45:57 +0100837 ret = td_io_getevents(td, min_events, td->cur_depth, tvp);
Jens Axboe97601022007-02-18 12:47:29 +0100838 if (ret < 0) {
Jens Axboee1161c32007-02-22 19:36:48 +0100839 td_verror(td, -ret, "td_io_getevents");
Jens Axboe97601022007-02-18 12:47:29 +0100840 return ret;
841 } else if (!ret)
842 return ret;
843
Jens Axboed7762cf2007-02-23 12:34:57 +0100844 init_icd(&icd, ret);
Jens Axboe97601022007-02-18 12:47:29 +0100845 ios_completed(td, &icd);
846 if (!icd.error)
847 return icd.bytes_done[0] + icd.bytes_done[1];
848
Jens Axboe37e974a2007-03-02 15:16:45 +0100849 td_verror(td, icd.error, "io_u_queued_complete");
Jens Axboe97601022007-02-18 12:47:29 +0100850 return -1;
851}
Jens Axboe7e77dd02007-02-20 10:57:34 +0100852
853/*
854 * Call when io_u is really queued, to update the submission latency.
855 */
856void io_u_queued(struct thread_data *td, struct io_u *io_u)
857{
858 unsigned long slat_time;
859
Jens Axboed85f5112007-06-18 09:41:23 +0200860 slat_time = utime_since(&io_u->start_time, &io_u->issue_time);
Jens Axboe7e77dd02007-02-20 10:57:34 +0100861 add_slat_sample(td, io_u->ddir, slat_time);
862}
Jens Axboe433afcb2007-02-22 10:39:01 +0100863
Jens Axboe55bc9722007-02-22 11:30:05 +0100864#ifdef FIO_USE_TIMEOUT
Jens Axboe433afcb2007-02-22 10:39:01 +0100865void io_u_set_timeout(struct thread_data *td)
866{
867 assert(td->cur_depth);
868
869 td->timer.it_interval.tv_sec = 0;
870 td->timer.it_interval.tv_usec = 0;
871 td->timer.it_value.tv_sec = IO_U_TIMEOUT + IO_U_TIMEOUT_INC;
872 td->timer.it_value.tv_usec = 0;
873 setitimer(ITIMER_REAL, &td->timer, NULL);
874 fio_gettime(&td->timeout_end, NULL);
875}
Jens Axboe5945b9b2007-02-22 20:33:01 +0100876
877static void io_u_dump(struct io_u *io_u)
878{
879 unsigned long t_start = mtime_since_now(&io_u->start_time);
880 unsigned long t_issue = mtime_since_now(&io_u->issue_time);
881
882 log_err("io_u=%p, t_start=%lu, t_issue=%lu\n", io_u, t_start, t_issue);
883 log_err(" buf=%p/%p, len=%lu/%lu, offset=%llu\n", io_u->buf, io_u->xfer_buf, io_u->buflen, io_u->xfer_buflen, io_u->offset);
884 log_err(" ddir=%d, fname=%s\n", io_u->ddir, io_u->file->file_name);
885}
Jens Axboe55bc9722007-02-22 11:30:05 +0100886#else
887void io_u_set_timeout(struct thread_data fio_unused *td)
888{
889}
890#endif
Jens Axboe433afcb2007-02-22 10:39:01 +0100891
Jens Axboe55bc9722007-02-22 11:30:05 +0100892#ifdef FIO_USE_TIMEOUT
Jens Axboe433afcb2007-02-22 10:39:01 +0100893static void io_u_timeout_handler(int fio_unused sig)
894{
895 struct thread_data *td, *__td;
896 pid_t pid = getpid();
Jens Axboe5945b9b2007-02-22 20:33:01 +0100897 struct list_head *entry;
898 struct io_u *io_u;
Jens Axboe433afcb2007-02-22 10:39:01 +0100899 int i;
900
901 log_err("fio: io_u timeout\n");
902
903 /*
904 * TLS would be nice...
905 */
906 td = NULL;
907 for_each_td(__td, i) {
908 if (__td->pid == pid) {
909 td = __td;
910 break;
911 }
912 }
913
914 if (!td) {
915 log_err("fio: io_u timeout, can't find job\n");
916 exit(1);
917 }
918
919 if (!td->cur_depth) {
920 log_err("fio: timeout without pending work?\n");
921 return;
922 }
923
Jens Axboe15506d02007-03-15 15:04:43 +0100924 log_err("fio: io_u timeout: job=%s, pid=%d\n", td->o.name, td->pid);
Jens Axboe5945b9b2007-02-22 20:33:01 +0100925
926 list_for_each(entry, &td->io_u_busylist) {
927 io_u = list_entry(entry, struct io_u, list);
928
929 io_u_dump(io_u);
930 }
931
932 td_verror(td, ETIMEDOUT, "io_u timeout");
Jens Axboe433afcb2007-02-22 10:39:01 +0100933 exit(1);
934}
Jens Axboe55bc9722007-02-22 11:30:05 +0100935#endif
Jens Axboe433afcb2007-02-22 10:39:01 +0100936
937void io_u_init_timeout(void)
938{
Jens Axboe55bc9722007-02-22 11:30:05 +0100939#ifdef FIO_USE_TIMEOUT
Jens Axboe433afcb2007-02-22 10:39:01 +0100940 signal(SIGALRM, io_u_timeout_handler);
Jens Axboe55bc9722007-02-22 11:30:05 +0100941#endif
Jens Axboe433afcb2007-02-22 10:39:01 +0100942}