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mutex: clear mutex when removed
[fio.git] / fio.h
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1#ifndef FIO_H
2#define FIO_H
3
4#include <sched.h>
5#include <limits.h>
6#include <pthread.h>
7#include <sys/time.h>
8#include <sys/resource.h>
9#include <errno.h>
10#include <stdlib.h>
11#include <stdio.h>
12#include <unistd.h>
13#include <string.h>
14#include <inttypes.h>
15#include <assert.h>
16
17#include "compiler/compiler.h"
18#include "thread_options.h"
19#include "flist.h"
20#include "fifo.h"
21#include "arch/arch.h"
22#include "os/os.h"
23#include "mutex.h"
24#include "log.h"
25#include "debug.h"
26#include "file.h"
27#include "io_ddir.h"
28#include "ioengine.h"
29#include "iolog.h"
30#include "helpers.h"
31#include "options.h"
32#include "profile.h"
33#include "fio_time.h"
34#include "gettime.h"
35#include "oslib/getopt.h"
36#include "lib/rand.h"
37#include "lib/rbtree.h"
38#include "client.h"
39#include "server.h"
40#include "stat.h"
41#include "flow.h"
42#include "io_u_queue.h"
43#include "workqueue.h"
44
45#ifdef CONFIG_SOLARISAIO
46#include <sys/asynch.h>
47#endif
48
49#ifdef CONFIG_LIBNUMA
50#include <linux/mempolicy.h>
51#include <numa.h>
52
53/*
54 * "local" is pseudo-policy
55 */
56#define MPOL_LOCAL MPOL_MAX
57#endif
58
59/*
60 * offset generator types
61 */
62enum {
63 RW_SEQ_SEQ = 0,
64 RW_SEQ_IDENT,
65};
66
67enum {
68 TD_F_VER_BACKLOG = 1U << 0,
69 TD_F_TRIM_BACKLOG = 1U << 1,
70 TD_F_READ_IOLOG = 1U << 2,
71 TD_F_REFILL_BUFFERS = 1U << 3,
72 TD_F_SCRAMBLE_BUFFERS = 1U << 4,
73 TD_F_VER_NONE = 1U << 5,
74 TD_F_PROFILE_OPS = 1U << 6,
75 TD_F_COMPRESS = 1U << 7,
76 TD_F_NOIO = 1U << 8,
77 TD_F_COMPRESS_LOG = 1U << 9,
78 TD_F_VSTATE_SAVED = 1U << 10,
79 TD_F_NEED_LOCK = 1U << 11,
80 TD_F_CHILD = 1U << 12,
81 TD_F_NO_PROGRESS = 1U << 13,
82 TD_F_REGROW_LOGS = 1U << 14,
83};
84
85enum {
86 FIO_RAND_BS_OFF = 0,
87 FIO_RAND_VER_OFF,
88 FIO_RAND_MIX_OFF,
89 FIO_RAND_FILE_OFF,
90 FIO_RAND_BLOCK_OFF,
91 FIO_RAND_FILE_SIZE_OFF,
92 FIO_RAND_TRIM_OFF,
93 FIO_RAND_BUF_OFF,
94 FIO_RAND_SEQ_RAND_READ_OFF,
95 FIO_RAND_SEQ_RAND_WRITE_OFF,
96 FIO_RAND_SEQ_RAND_TRIM_OFF,
97 FIO_RAND_START_DELAY,
98 FIO_DEDUPE_OFF,
99 FIO_RAND_POISSON_OFF,
100 FIO_RAND_ZONE_OFF,
101 FIO_RAND_NR_OFFS,
102};
103
104enum {
105 IO_MODE_INLINE = 0,
106 IO_MODE_OFFLOAD = 1,
107
108 RATE_PROCESS_LINEAR = 0,
109 RATE_PROCESS_POISSON = 1,
110};
111
112/*
113 * Per-thread/process specific data. Only used for the network client
114 * for now.
115 */
116struct sk_out;
117void sk_out_assign(struct sk_out *);
118void sk_out_drop(void);
119
120struct zone_split_index {
121 uint8_t size_perc;
122 uint8_t size_perc_prev;
123};
124
125/*
126 * This describes a single thread/process executing a fio job.
127 */
128struct thread_data {
129 struct flist_head opt_list;
130 unsigned long flags;
131 struct thread_options o;
132 void *eo;
133 pthread_t thread;
134 unsigned int thread_number;
135 unsigned int subjob_number;
136 unsigned int groupid;
137 struct thread_stat ts;
138
139 int client_type;
140
141 struct io_log *slat_log;
142 struct io_log *clat_log;
143 struct io_log *clat_hist_log;
144 struct io_log *lat_log;
145 struct io_log *bw_log;
146 struct io_log *iops_log;
147
148 struct workqueue log_compress_wq;
149
150 struct thread_data *parent;
151
152 uint64_t stat_io_bytes[DDIR_RWDIR_CNT];
153 struct timeval bw_sample_time;
154
155 uint64_t stat_io_blocks[DDIR_RWDIR_CNT];
156 struct timeval iops_sample_time;
157
158 volatile int update_rusage;
159 struct fio_mutex *rusage_sem;
160 struct rusage ru_start;
161 struct rusage ru_end;
162
163 struct fio_file **files;
164 unsigned char *file_locks;
165 unsigned int files_size;
166 unsigned int files_index;
167 unsigned int nr_open_files;
168 unsigned int nr_done_files;
169 unsigned int nr_normal_files;
170 union {
171 unsigned int next_file;
172 struct frand_state next_file_state;
173 };
174 union {
175 struct zipf_state next_file_zipf;
176 struct gauss_state next_file_gauss;
177 };
178 union {
179 double zipf_theta;
180 double pareto_h;
181 double gauss_dev;
182 };
183 int error;
184 int sig;
185 int done;
186 int stop_io;
187 pid_t pid;
188 char *orig_buffer;
189 size_t orig_buffer_size;
190 volatile int terminate;
191 volatile int runstate;
192 unsigned int last_was_sync;
193 enum fio_ddir last_ddir;
194
195 int mmapfd;
196
197 void *iolog_buf;
198 FILE *iolog_f;
199
200 char *sysfs_root;
201
202 unsigned long rand_seeds[FIO_RAND_NR_OFFS];
203
204 struct frand_state bsrange_state;
205 struct frand_state verify_state;
206 struct frand_state trim_state;
207 struct frand_state delay_state;
208
209 struct frand_state buf_state;
210 struct frand_state buf_state_prev;
211 struct frand_state dedupe_state;
212 struct frand_state zone_state;
213
214 struct zone_split_index **zone_state_index;
215
216 unsigned int verify_batch;
217 unsigned int trim_batch;
218
219 struct thread_io_list *vstate;
220
221 int shm_id;
222
223 /*
224 * IO engine hooks, contains everything needed to submit an io_u
225 * to any of the available IO engines.
226 */
227 struct ioengine_ops *io_ops;
228
229 /*
230 * IO engine private data and dlhandle.
231 */
232 void *io_ops_data;
233 void *io_ops_dlhandle;
234
235 /*
236 * Queue depth of io_u's that fio MIGHT do
237 */
238 unsigned int cur_depth;
239
240 /*
241 * io_u's about to be committed
242 */
243 unsigned int io_u_queued;
244
245 /*
246 * io_u's submitted but not completed yet
247 */
248 unsigned int io_u_in_flight;
249
250 /*
251 * List of free and busy io_u's
252 */
253 struct io_u_ring io_u_requeues;
254 struct io_u_queue io_u_freelist;
255 struct io_u_queue io_u_all;
256 pthread_mutex_t io_u_lock;
257 pthread_cond_t free_cond;
258
259 /*
260 * async verify offload
261 */
262 struct flist_head verify_list;
263 pthread_t *verify_threads;
264 unsigned int nr_verify_threads;
265 pthread_cond_t verify_cond;
266 int verify_thread_exit;
267
268 /*
269 * Rate state
270 */
271 uint64_t rate_bps[DDIR_RWDIR_CNT];
272 unsigned long rate_next_io_time[DDIR_RWDIR_CNT];
273 unsigned long rate_bytes[DDIR_RWDIR_CNT];
274 unsigned long rate_blocks[DDIR_RWDIR_CNT];
275 unsigned long rate_io_issue_bytes[DDIR_RWDIR_CNT];
276 struct timeval lastrate[DDIR_RWDIR_CNT];
277 int64_t last_usec;
278 struct frand_state poisson_state;
279
280 /*
281 * Enforced rate submission/completion workqueue
282 */
283 struct workqueue io_wq;
284
285 uint64_t total_io_size;
286 uint64_t fill_device_size;
287
288 /*
289 * Issue side
290 */
291 uint64_t io_issues[DDIR_RWDIR_CNT];
292 uint64_t io_issue_bytes[DDIR_RWDIR_CNT];
293 uint64_t loops;
294
295 /*
296 * Completions
297 */
298 uint64_t io_blocks[DDIR_RWDIR_CNT];
299 uint64_t this_io_blocks[DDIR_RWDIR_CNT];
300 uint64_t io_bytes[DDIR_RWDIR_CNT];
301 uint64_t this_io_bytes[DDIR_RWDIR_CNT];
302 uint64_t io_skip_bytes;
303 uint64_t zone_bytes;
304 struct fio_mutex *mutex;
305 uint64_t bytes_done[DDIR_RWDIR_CNT];
306
307 /*
308 * State for random io, a bitmap of blocks done vs not done
309 */
310 struct frand_state random_state;
311
312 struct timeval start; /* start of this loop */
313 struct timeval epoch; /* time job was started */
314 unsigned long long unix_epoch; /* Time job was started, unix epoch based. */
315 struct timeval last_issue;
316 long time_offset;
317 struct timeval tv_cache;
318 struct timeval terminate_time;
319 unsigned int tv_cache_nr;
320 unsigned int tv_cache_mask;
321 unsigned int ramp_time_over;
322
323 /*
324 * Time since last latency_window was started
325 */
326 struct timeval latency_ts;
327 unsigned int latency_qd;
328 unsigned int latency_qd_high;
329 unsigned int latency_qd_low;
330 unsigned int latency_failed;
331 uint64_t latency_ios;
332 int latency_end_run;
333
334 /*
335 * read/write mixed workload state
336 */
337 struct frand_state rwmix_state;
338 unsigned long rwmix_issues;
339 enum fio_ddir rwmix_ddir;
340 unsigned int ddir_seq_nr;
341
342 /*
343 * rand/seq mixed workload state
344 */
345 struct frand_state seq_rand_state[DDIR_RWDIR_CNT];
346
347 /*
348 * IO history logs for verification. We use a tree for sorting,
349 * if we are overwriting. Otherwise just use a fifo.
350 */
351 struct rb_root io_hist_tree;
352 struct flist_head io_hist_list;
353 unsigned long io_hist_len;
354
355 /*
356 * For IO replaying
357 */
358 struct flist_head io_log_list;
359
360 /*
361 * For tracking/handling discards
362 */
363 struct flist_head trim_list;
364 unsigned long trim_entries;
365
366 struct flist_head next_rand_list;
367
368 /*
369 * for fileservice, how often to switch to a new file
370 */
371 unsigned int file_service_nr;
372 unsigned int file_service_left;
373 struct fio_file *file_service_file;
374
375 unsigned int sync_file_range_nr;
376
377 /*
378 * For generating file sizes
379 */
380 struct frand_state file_size_state;
381
382 /*
383 * Error counts
384 */
385 unsigned int total_err_count;
386 int first_error;
387
388 struct fio_flow *flow;
389
390 /*
391 * Can be overloaded by profiles
392 */
393 struct prof_io_ops prof_io_ops;
394 void *prof_data;
395
396 void *pinned_mem;
397
398 char verror[FIO_VERROR_SIZE];
399};
400
401/*
402 * when should interactive ETA output be generated
403 */
404enum {
405 FIO_ETA_AUTO,
406 FIO_ETA_ALWAYS,
407 FIO_ETA_NEVER,
408};
409
410#define __td_verror(td, err, msg, func) \
411 do { \
412 unsigned int ____e = (err); \
413 if ((td)->error) \
414 break; \
415 (td)->error = ____e; \
416 if (!(td)->first_error) \
417 snprintf(td->verror, sizeof(td->verror), "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
418 } while (0)
419
420
421#define td_clear_error(td) do { \
422 (td)->error = 0; \
423 if ((td)->parent) \
424 (td)->parent->error = 0; \
425} while (0)
426
427#define td_verror(td, err, func) do { \
428 __td_verror((td), (err), strerror((err)), (func)); \
429 if ((td)->parent) \
430 __td_verror((td)->parent, (err), strerror((err)), (func)); \
431} while (0)
432
433#define td_vmsg(td, err, msg, func) do { \
434 __td_verror((td), (err), (msg), (func)); \
435 if ((td)->parent) \
436 __td_verror((td)->parent, (err), (msg), (func)); \
437} while (0)
438
439#define __fio_stringify_1(x) #x
440#define __fio_stringify(x) __fio_stringify_1(x)
441
442extern int exitall_on_terminate;
443extern unsigned int thread_number;
444extern unsigned int stat_number;
445extern int shm_id;
446extern int groupid;
447extern int output_format;
448extern int append_terse_output;
449extern int temp_stall_ts;
450extern uintptr_t page_mask, page_size;
451extern int read_only;
452extern int eta_print;
453extern int eta_new_line;
454extern unsigned long done_secs;
455extern int fio_gtod_offload;
456extern int fio_gtod_cpu;
457extern enum fio_cs fio_clock_source;
458extern int fio_clock_source_set;
459extern int warnings_fatal;
460extern int terse_version;
461extern int is_backend;
462extern int nr_clients;
463extern int log_syslog;
464extern int status_interval;
465extern const char fio_version_string[];
466extern char *trigger_file;
467extern char *trigger_cmd;
468extern char *trigger_remote_cmd;
469extern long long trigger_timeout;
470extern char *aux_path;
471
472extern struct thread_data *threads;
473
474static inline void fio_ro_check(const struct thread_data *td, struct io_u *io_u)
475{
476 assert(!(io_u->ddir == DDIR_WRITE && !td_write(td)));
477}
478
479#define REAL_MAX_JOBS 4096
480
481static inline int should_fsync(struct thread_data *td)
482{
483 if (td->last_was_sync)
484 return 0;
485 if (td_write(td) || td_rw(td) || td->o.override_sync)
486 return 1;
487
488 return 0;
489}
490
491/*
492 * Init/option functions
493 */
494extern int __must_check fio_init_options(void);
495extern int __must_check parse_options(int, char **);
496extern int parse_jobs_ini(char *, int, int, int);
497extern int parse_cmd_line(int, char **, int);
498extern int fio_backend(struct sk_out *);
499extern void reset_fio_state(void);
500extern void clear_io_state(struct thread_data *, int);
501extern int fio_options_parse(struct thread_data *, char **, int);
502extern void fio_keywords_init(void);
503extern void fio_keywords_exit(void);
504extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
505extern int fio_cmd_ioengine_option_parse(struct thread_data *, const char *, char *);
506extern void fio_fill_default_options(struct thread_data *);
507extern int fio_show_option_help(const char *);
508extern void fio_options_set_ioengine_opts(struct option *long_options, struct thread_data *td);
509extern void fio_options_dup_and_init(struct option *);
510extern void fio_options_mem_dupe(struct thread_data *);
511extern void options_mem_dupe(void *data, struct fio_option *options);
512extern void td_fill_rand_seeds(struct thread_data *);
513extern void td_fill_verify_state_seed(struct thread_data *);
514extern void add_job_opts(const char **, int);
515extern char *num2str(uint64_t, int, int, int, int);
516extern int ioengine_load(struct thread_data *);
517extern bool parse_dryrun(void);
518extern int fio_running_or_pending_io_threads(void);
519extern int fio_set_fd_nonblocking(int, const char *);
520extern void sig_show_status(int sig);
521extern struct thread_data *get_global_options(void);
522
523extern uintptr_t page_mask;
524extern uintptr_t page_size;
525extern int initialize_fio(char *envp[]);
526extern void deinitialize_fio(void);
527
528#define FIO_GETOPT_JOB 0x89000000
529#define FIO_GETOPT_IOENGINE 0x98000000
530#define FIO_NR_OPTIONS (FIO_MAX_OPTS + 128)
531
532/*
533 * ETA/status stuff
534 */
535extern void print_thread_status(void);
536extern void print_status_init(int);
537extern char *fio_uint_to_kmg(unsigned int val);
538
539/*
540 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
541 * will never back again. It may cycle between running/verififying/fsyncing.
542 * Once the thread reaches TD_EXITED, it is just waiting for the core to
543 * reap it.
544 */
545enum {
546 TD_NOT_CREATED = 0,
547 TD_CREATED,
548 TD_INITIALIZED,
549 TD_RAMP,
550 TD_SETTING_UP,
551 TD_RUNNING,
552 TD_PRE_READING,
553 TD_VERIFYING,
554 TD_FSYNCING,
555 TD_FINISHING,
556 TD_EXITED,
557 TD_REAPED,
558 TD_LAST,
559 TD_NR,
560};
561
562#define TD_ENG_FLAG_SHIFT 16
563#define TD_ENG_FLAG_MASK ((1U << 16) - 1)
564
565static inline enum fio_ioengine_flags td_ioengine_flags(struct thread_data *td)
566{
567 return (enum fio_ioengine_flags)
568 ((td->flags >> TD_ENG_FLAG_SHIFT) & TD_ENG_FLAG_MASK);
569}
570
571static inline void td_set_ioengine_flags(struct thread_data *td)
572{
573 td->flags |= (td->io_ops->flags << TD_ENG_FLAG_SHIFT);
574}
575
576static inline bool td_ioengine_flagged(struct thread_data *td,
577 enum fio_ioengine_flags flags)
578{
579 return ((td->flags >> TD_ENG_FLAG_SHIFT) & flags) != 0;
580}
581
582extern void td_set_runstate(struct thread_data *, int);
583extern int td_bump_runstate(struct thread_data *, int);
584extern void td_restore_runstate(struct thread_data *, int);
585extern const char *runstate_to_name(int runstate);
586
587/*
588 * Allow 60 seconds for a job to quit on its own, otherwise reap with
589 * a vengeance.
590 */
591#define FIO_REAP_TIMEOUT 60
592
593#define TERMINATE_ALL (-1U)
594extern void fio_terminate_threads(unsigned int);
595extern void fio_mark_td_terminate(struct thread_data *);
596
597/*
598 * Memory helpers
599 */
600extern int __must_check fio_pin_memory(struct thread_data *);
601extern void fio_unpin_memory(struct thread_data *);
602extern int __must_check allocate_io_mem(struct thread_data *);
603extern void free_io_mem(struct thread_data *);
604extern void free_threads_shm(void);
605
606/*
607 * Reset stats after ramp time completes
608 */
609extern void reset_all_stats(struct thread_data *);
610
611/*
612 * blktrace support
613 */
614#ifdef FIO_HAVE_BLKTRACE
615extern int is_blktrace(const char *, int *);
616extern int load_blktrace(struct thread_data *, const char *, int);
617#endif
618
619extern int io_queue_event(struct thread_data *td, struct io_u *io_u, int *ret,
620 enum fio_ddir ddir, uint64_t *bytes_issued, int from_verify,
621 struct timeval *comp_time);
622
623/*
624 * Latency target helpers
625 */
626extern void lat_target_check(struct thread_data *);
627extern void lat_target_init(struct thread_data *);
628extern void lat_target_reset(struct thread_data *);
629
630#define for_each_td(td, i) \
631 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
632#define for_each_file(td, f, i) \
633 if ((td)->files_index) \
634 for ((i) = 0, (f) = (td)->files[0]; \
635 (i) < (td)->o.nr_files && ((f) = (td)->files[i]) != NULL; \
636 (i)++)
637
638#define fio_assert(td, cond) do { \
639 if (!(cond)) { \
640 int *__foo = NULL; \
641 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
642 td_set_runstate((td), TD_EXITED); \
643 (td)->error = EFAULT; \
644 *__foo = 0; \
645 } \
646} while (0)
647
648static inline bool fio_fill_issue_time(struct thread_data *td)
649{
650 if (td->o.read_iolog_file ||
651 !td->o.disable_clat || !td->o.disable_slat || !td->o.disable_bw)
652 return true;
653
654 return false;
655}
656
657static inline bool __should_check_rate(struct thread_data *td,
658 enum fio_ddir ddir)
659{
660 struct thread_options *o = &td->o;
661
662 /*
663 * If some rate setting was given, we need to check it
664 */
665 if (o->rate[ddir] || o->ratemin[ddir] || o->rate_iops[ddir] ||
666 o->rate_iops_min[ddir])
667 return true;
668
669 return false;
670}
671
672static inline bool should_check_rate(struct thread_data *td)
673{
674 if (td->bytes_done[DDIR_READ] && __should_check_rate(td, DDIR_READ))
675 return true;
676 if (td->bytes_done[DDIR_WRITE] && __should_check_rate(td, DDIR_WRITE))
677 return true;
678 if (td->bytes_done[DDIR_TRIM] && __should_check_rate(td, DDIR_TRIM))
679 return true;
680
681 return false;
682}
683
684static inline unsigned int td_max_bs(struct thread_data *td)
685{
686 unsigned int max_bs;
687
688 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
689 return max(td->o.max_bs[DDIR_TRIM], max_bs);
690}
691
692static inline unsigned int td_min_bs(struct thread_data *td)
693{
694 unsigned int min_bs;
695
696 min_bs = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
697 return min(td->o.min_bs[DDIR_TRIM], min_bs);
698}
699
700static inline bool td_async_processing(struct thread_data *td)
701{
702 return (td->flags & TD_F_NEED_LOCK) != 0;
703}
704
705/*
706 * We currently only need to do locking if we have verifier threads
707 * accessing our internal structures too
708 */
709static inline void td_io_u_lock(struct thread_data *td)
710{
711 if (td_async_processing(td))
712 pthread_mutex_lock(&td->io_u_lock);
713}
714
715static inline void td_io_u_unlock(struct thread_data *td)
716{
717 if (td_async_processing(td))
718 pthread_mutex_unlock(&td->io_u_lock);
719}
720
721static inline void td_io_u_free_notify(struct thread_data *td)
722{
723 if (td_async_processing(td))
724 pthread_cond_signal(&td->free_cond);
725}
726
727static inline void td_flags_clear(struct thread_data *td, unsigned int *flags,
728 unsigned int value)
729{
730 if (!td_async_processing(td))
731 *flags &= ~value;
732 else
733 __sync_fetch_and_and(flags, ~value);
734}
735
736static inline void td_flags_set(struct thread_data *td, unsigned int *flags,
737 unsigned int value)
738{
739 if (!td_async_processing(td))
740 *flags |= value;
741 else
742 __sync_fetch_and_or(flags, value);
743}
744
745extern const char *fio_get_arch_string(int);
746extern const char *fio_get_os_string(int);
747
748#ifdef FIO_INTERNAL
749#define ARRAY_SIZE(x) (sizeof((x)) / (sizeof((x)[0])))
750#define FIELD_SIZE(s, f) (sizeof(((typeof(s))0)->f))
751#endif
752
753enum {
754 __FIO_OUTPUT_TERSE = 0,
755 __FIO_OUTPUT_JSON = 1,
756 __FIO_OUTPUT_NORMAL = 2,
757 __FIO_OUTPUT_JSON_PLUS = 3,
758 FIO_OUTPUT_NR = 4,
759
760 FIO_OUTPUT_TERSE = 1U << __FIO_OUTPUT_TERSE,
761 FIO_OUTPUT_JSON = 1U << __FIO_OUTPUT_JSON,
762 FIO_OUTPUT_NORMAL = 1U << __FIO_OUTPUT_NORMAL,
763 FIO_OUTPUT_JSON_PLUS = 1U << __FIO_OUTPUT_JSON_PLUS,
764};
765
766enum {
767 FIO_RAND_DIST_RANDOM = 0,
768 FIO_RAND_DIST_ZIPF,
769 FIO_RAND_DIST_PARETO,
770 FIO_RAND_DIST_GAUSS,
771 FIO_RAND_DIST_ZONED,
772};
773
774#define FIO_DEF_ZIPF 1.1
775#define FIO_DEF_PARETO 0.2
776
777enum {
778 FIO_RAND_GEN_TAUSWORTHE = 0,
779 FIO_RAND_GEN_LFSR,
780 FIO_RAND_GEN_TAUSWORTHE64,
781};
782
783enum {
784 FIO_CPUS_SHARED = 0,
785 FIO_CPUS_SPLIT,
786};
787
788extern void exec_trigger(const char *);
789extern void check_trigger_file(void);
790
791#endif
fio - Flexible IO Tester