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Leftover debug printf()
[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 <getopt.h>
15
16#include "list.h"
17#include "md5.h"
18#include "crc32.h"
19#include "arch.h"
20#include "os.h"
21#include "mutex.h"
22
23#ifdef FIO_HAVE_SYSLET
24#include "syslet.h"
25#endif
26
27#ifdef FIO_HAVE_GUASI
28#include <guasi.h>
29#endif
30
31enum fio_ddir {
32 DDIR_READ = 0,
33 DDIR_WRITE,
34 DDIR_SYNC,
35};
36
37enum td_ddir {
38 TD_DDIR_READ = 1 << 0,
39 TD_DDIR_WRITE = 1 << 1,
40 TD_DDIR_RAND = 1 << 2,
41 TD_DDIR_RW = TD_DDIR_READ | TD_DDIR_WRITE,
42 TD_DDIR_RANDREAD = TD_DDIR_READ | TD_DDIR_RAND,
43 TD_DDIR_RANDWRITE = TD_DDIR_WRITE | TD_DDIR_RAND,
44 TD_DDIR_RANDRW = TD_DDIR_RW | TD_DDIR_RAND,
45};
46
47/*
48 * Use for maintaining statistics
49 */
50struct io_stat {
51 unsigned long max_val;
52 unsigned long min_val;
53 unsigned long samples;
54
55 double mean;
56 double S;
57};
58
59/*
60 * A single data sample
61 */
62struct io_sample {
63 unsigned long time;
64 unsigned long val;
65 enum fio_ddir ddir;
66};
67
68/*
69 * Dynamically growing data sample log
70 */
71struct io_log {
72 unsigned long nr_samples;
73 unsigned long max_samples;
74 struct io_sample *log;
75};
76
77/*
78 * When logging io actions, this matches a single sent io_u
79 */
80struct io_piece {
81 struct list_head list;
82 struct fio_file *file;
83 unsigned long long offset;
84 unsigned long len;
85 enum fio_ddir ddir;
86};
87
88#ifdef FIO_HAVE_SYSLET
89struct syslet_req {
90 struct syslet_uatom atom; /* the atom to submit */
91 struct syslet_uatom *head; /* head of the sequence */
92 long ret; /* syscall return value */
93};
94#endif
95
96enum {
97 IO_U_F_FREE = 1 << 0,
98 IO_U_F_FLIGHT = 1 << 1,
99};
100
101/*
102 * The io unit
103 */
104struct io_u {
105 union {
106#ifdef FIO_HAVE_LIBAIO
107 struct iocb iocb;
108#endif
109#ifdef FIO_HAVE_POSIXAIO
110 struct aiocb aiocb;
111#endif
112#ifdef FIO_HAVE_SGIO
113 struct sg_io_hdr hdr;
114#endif
115#ifdef FIO_HAVE_SYSLET
116 struct syslet_req req;
117#endif
118#ifdef FIO_HAVE_GUASI
119 guasi_req_t greq;
120#endif
121 };
122 struct timeval start_time;
123 struct timeval issue_time;
124
125 /*
126 * Allocated/set buffer and length
127 */
128 void *buf;
129 unsigned long buflen;
130 unsigned long long offset;
131
132 /*
133 * IO engine state, may be different from above when we get
134 * partial transfers / residual data counts
135 */
136 void *xfer_buf;
137 unsigned long xfer_buflen;
138
139 unsigned int resid;
140 unsigned int error;
141
142 enum fio_ddir ddir;
143
144 /*
145 * io engine private data
146 */
147 union {
148 unsigned int index;
149 unsigned int seen;
150 };
151
152 unsigned int flags;
153
154 struct fio_file *file;
155
156 struct list_head list;
157
158 /*
159 * Callback for io completion
160 */
161 int (*end_io)(struct io_u *);
162};
163
164/*
165 * io_ops->queue() return values
166 */
167enum {
168 FIO_Q_COMPLETED = 0, /* completed sync */
169 FIO_Q_QUEUED = 1, /* queued, will complete async */
170 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
171};
172
173#define FIO_HDR_MAGIC 0xf00baaef
174
175enum {
176 VERIFY_NONE = 0, /* no verification */
177 VERIFY_MD5, /* md5 sum data blocks */
178 VERIFY_CRC32, /* crc32 sum data blocks */
179};
180
181/*
182 * A header structure associated with each checksummed data block
183 */
184struct verify_header {
185 unsigned int fio_magic;
186 unsigned int len;
187 unsigned int verify_type;
188 union {
189 char md5_digest[MD5_HASH_WORDS * 4];
190 unsigned long crc32;
191 };
192};
193
194struct group_run_stats {
195 unsigned long long max_run[2], min_run[2];
196 unsigned long long max_bw[2], min_bw[2];
197 unsigned long long io_kb[2];
198 unsigned long long agg[2];
199};
200
201/*
202 * What type of allocation to use for io buffers
203 */
204enum fio_memtype {
205 MEM_MALLOC = 0, /* ordinary malloc */
206 MEM_SHM, /* use shared memory segments */
207 MEM_SHMHUGE, /* use shared memory segments with huge pages */
208 MEM_MMAP, /* use anonynomous mmap */
209 MEM_MMAPHUGE, /* memory mapped huge file */
210};
211
212/*
213 * The type of object we are working on
214 */
215enum fio_filetype {
216 FIO_TYPE_FILE = 1, /* plain file */
217 FIO_TYPE_BD, /* block device */
218 FIO_TYPE_CHAR, /* character device */
219};
220
221enum fio_ioengine_flags {
222 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
223 FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
224 FIO_DISKLESSIO = 1 << 2, /* no disk involved */
225 FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
226 FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
227};
228
229enum fio_file_flags {
230 FIO_FILE_OPEN = 1 << 0, /* file is open */
231 FIO_FILE_UNLINK = 1 << 1, /* unlink on close */
232 FIO_FILE_CLOSING = 1 << 2, /* file being closed */
233 FIO_FILE_EXISTS = 1 << 3, /* no need to create */
234};
235
236/*
237 * Each thread_data structure has a number of files associated with it,
238 * this structure holds state information for a single file.
239 */
240struct fio_file {
241 enum fio_filetype filetype;
242
243 /*
244 * A file may not be a file descriptor, let the io engine decide
245 */
246 union {
247 unsigned long file_data;
248 int fd;
249 };
250 char *file_name;
251 void *mmap;
252 unsigned long long file_size;
253 unsigned long long real_file_size;
254 unsigned long long file_offset;
255 unsigned long long last_pos;
256 unsigned long long last_completed_pos;
257
258 /*
259 * block map for random io
260 */
261 unsigned long *file_map;
262 unsigned int num_maps;
263 unsigned int last_free_lookup;
264
265 int references;
266 enum fio_file_flags flags;
267};
268
269/*
270 * How many depth levels to log
271 */
272#define FIO_IO_U_MAP_NR 8
273#define FIO_IO_U_LAT_NR 12
274
275struct thread_stat {
276 char *name;
277 char *verror;
278 int error;
279 int groupid;
280 pid_t pid;
281 char *description;
282 int members;
283
284 struct io_log *slat_log;
285 struct io_log *clat_log;
286 struct io_log *bw_log;
287
288 /*
289 * bandwidth and latency stats
290 */
291 struct io_stat clat_stat[2]; /* completion latency */
292 struct io_stat slat_stat[2]; /* submission latency */
293 struct io_stat bw_stat[2]; /* bandwidth stats */
294
295 unsigned long long stat_io_bytes[2];
296 struct timeval stat_sample_time[2];
297
298 /*
299 * fio system usage accounting
300 */
301 struct rusage ru_start;
302 struct rusage ru_end;
303 unsigned long usr_time;
304 unsigned long sys_time;
305 unsigned long ctx;
306
307 /*
308 * IO depth and latency stats
309 */
310 unsigned int io_u_map[FIO_IO_U_MAP_NR];
311 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
312 unsigned long total_io_u[2];
313
314 unsigned long long io_bytes[2];
315 unsigned long runtime[2];
316 unsigned long total_run_time;
317};
318
319struct thread_options {
320 int pad;
321 char *description;
322 char *name;
323 char *directory;
324 char *filename;
325 char *opendir;
326 char *ioengine;
327 enum td_ddir td_ddir;
328 unsigned int ddir_nr;
329 unsigned int iodepth;
330 unsigned int iodepth_low;
331 unsigned int iodepth_batch;
332
333 unsigned long long size;
334 unsigned long long file_size_low;
335 unsigned long long file_size_high;
336 unsigned long long start_offset;
337
338 unsigned int bs[2];
339 unsigned int min_bs[2];
340 unsigned int max_bs[2];
341
342 unsigned int nr_files;
343 unsigned int open_files;
344
345 unsigned int odirect;
346 unsigned int invalidate_cache;
347 unsigned int create_serialize;
348 unsigned int create_fsync;
349 unsigned int end_fsync;
350 unsigned int sync_io;
351 unsigned int verify;
352 unsigned int use_thread;
353 unsigned int unlink;
354 unsigned int do_disk_util;
355 unsigned int override_sync;
356 unsigned int rand_repeatable;
357 unsigned int write_lat_log;
358 unsigned int write_bw_log;
359 unsigned int norandommap;
360 unsigned int bs_unaligned;
361 unsigned int fsync_on_close;
362
363 unsigned int hugepage_size;
364 unsigned int rw_min_bs;
365 unsigned int thinktime;
366 unsigned int thinktime_spin;
367 unsigned int thinktime_blocks;
368 unsigned int fsync_blocks;
369 unsigned int start_delay;
370 unsigned long timeout;
371 unsigned int overwrite;
372 unsigned int bw_avg_time;
373 unsigned int loops;
374 unsigned long long zone_size;
375 unsigned long long zone_skip;
376 enum fio_memtype mem_type;
377
378 unsigned int stonewall;
379 unsigned int new_group;
380 unsigned int numjobs;
381 os_cpu_mask_t cpumask;
382 unsigned int iolog;
383 unsigned int read_iolog;
384 unsigned int rwmixcycle;
385 unsigned int rwmix[2];
386 unsigned int nice;
387 unsigned int file_service_type;
388 unsigned int group_reporting;
389
390 char *read_iolog_file;
391 char *write_iolog_file;
392
393 /*
394 * Pre-run and post-run shell
395 */
396 char *exec_prerun;
397 char *exec_postrun;
398
399 unsigned int rate;
400 unsigned int ratemin;
401 unsigned int ratecycle;
402 unsigned int rate_iops;
403 unsigned int rate_iops_min;
404
405 char *ioscheduler;
406
407 /*
408 * CPU "io" cycle burner
409 */
410 unsigned int cpuload;
411 unsigned int cpucycle;
412};
413
414#define FIO_VERROR_SIZE 128
415
416/*
417 * This describes a single thread/process executing a fio job.
418 */
419struct thread_data {
420 struct thread_options o;
421 char verror[FIO_VERROR_SIZE];
422 pthread_t thread;
423 int thread_number;
424 int groupid;
425 struct thread_stat ts;
426 struct fio_file *files;
427 unsigned int files_index;
428 unsigned int nr_open_files;
429 unsigned int nr_normal_files;
430 union {
431 unsigned int next_file;
432 os_random_state_t next_file_state;
433 };
434 int error;
435 pid_t pid;
436 char *orig_buffer;
437 size_t orig_buffer_size;
438 volatile int terminate;
439 volatile int runstate;
440 unsigned int ioprio;
441 unsigned int last_was_sync;
442
443 char *mmapfile;
444 int mmapfd;
445
446 void *iolog_buf;
447 FILE *iolog_f;
448
449 char *sysfs_root;
450
451 os_random_state_t bsrange_state;
452 os_random_state_t verify_state;
453
454 int shm_id;
455
456 /*
457 * IO engine hooks, contains everything needed to submit an io_u
458 * to any of the available IO engines.
459 */
460 struct ioengine_ops *io_ops;
461
462 /*
463 * Current IO depth and list of free and busy io_u's.
464 */
465 unsigned int cur_depth;
466 struct list_head io_u_freelist;
467 struct list_head io_u_busylist;
468 struct list_head io_u_requeues;
469 unsigned int io_u_queued;
470
471 /*
472 * Rate state
473 */
474 unsigned long rate_usec_cycle;
475 long rate_pending_usleep;
476 unsigned long rate_bytes;
477 unsigned long rate_blocks;
478 struct timeval lastrate;
479
480 unsigned long long io_size;
481 unsigned long long total_io_size;
482
483 unsigned long io_issues[2];
484 unsigned long long io_blocks[2];
485 unsigned long long io_bytes[2];
486 unsigned long long this_io_bytes[2];
487 unsigned long long zone_bytes;
488 struct fio_sem *mutex;
489
490 /*
491 * State for random io, a bitmap of blocks done vs not done
492 */
493 os_random_state_t random_state;
494
495 struct timeval start; /* start of this loop */
496 struct timeval epoch; /* time job was started */
497 struct timeval rw_end[2];
498 unsigned int rw_end_set[2];
499
500 /*
501 * read/write mixed workload state
502 */
503 os_random_state_t rwmix_state;
504 unsigned long long rwmix_bytes;
505 struct timeval rwmix_switch;
506 enum fio_ddir rwmix_ddir;
507 unsigned int ddir_nr;
508
509 /*
510 * IO historic logs
511 */
512 struct list_head io_hist_list;
513 struct list_head io_log_list;
514
515 /*
516 * timeout handling
517 */
518 struct timeval timeout_end;
519 struct itimerval timer;
520
521 /*
522 * for fileservice, how often to switch to a new file
523 */
524 unsigned int file_service_nr;
525 unsigned int file_service_left;
526 struct fio_file *file_service_file;
527
528 /*
529 * For generating file sizes
530 */
531 os_random_state_t file_size_state;
532};
533
534/*
535 * roundrobin available files, or choose one at random.
536 */
537enum {
538 FIO_FSERVICE_RANDOM = 1,
539 FIO_FSERVICE_RR = 2,
540};
541
542/*
543 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
544 * the timer on each queue operation.
545 */
546#define IO_U_TIMEOUT_INC 5
547#define IO_U_TIMEOUT 30
548
549#define __td_verror(td, err, msg, func) \
550 do { \
551 if ((td)->error) \
552 break; \
553 int e = (err); \
554 (td)->error = e; \
555 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
556 } while (0)
557
558
559#define td_verror(td, err, func) \
560 __td_verror((td), (err), strerror((err)), (func))
561#define td_vmsg(td, err, msg, func) \
562 __td_verror((td), (err), (msg), (func))
563
564extern int exitall_on_terminate;
565extern int thread_number;
566extern int nr_process, nr_thread;
567extern int shm_id;
568extern int groupid;
569extern int terse_output;
570extern FILE *f_out;
571extern FILE *f_err;
572extern int temp_stall_ts;
573extern unsigned long long mlock_size;
574extern unsigned long page_mask, page_size;
575
576extern struct thread_data *threads;
577
578#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
579#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
580#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
581#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
582
583#define BLOCKS_PER_MAP (8 * sizeof(long))
584#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
585#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
586#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
587
588#define MAX_JOBS (1024)
589
590static inline int should_fsync(struct thread_data *td)
591{
592 if (td->last_was_sync)
593 return 0;
594 if (td->o.odirect)
595 return 0;
596 if (td_write(td) || td_rw(td) || td->o.override_sync)
597 return 1;
598
599 return 0;
600}
601
602/*
603 * Disk utils as read in /sys/block/<dev>/stat
604 */
605struct disk_util_stat {
606 unsigned ios[2];
607 unsigned merges[2];
608 unsigned long long sectors[2];
609 unsigned ticks[2];
610 unsigned io_ticks;
611 unsigned time_in_queue;
612};
613
614/*
615 * Per-device disk util management
616 */
617struct disk_util {
618 struct list_head list;
619
620 char *name;
621 char path[256];
622 dev_t dev;
623
624 struct disk_util_stat dus;
625 struct disk_util_stat last_dus;
626
627 unsigned long msec;
628 struct timeval time;
629};
630
631#define DISK_UTIL_MSEC (250)
632
633#ifndef min
634#define min(a, b) ((a) < (b) ? (a) : (b))
635#endif
636#ifndef max
637#define max(a, b) ((a) > (b) ? (a) : (b))
638#endif
639
640/*
641 * Log exports
642 */
643extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
644extern void write_iolog_put(struct thread_data *, struct io_u *);
645extern int __must_check init_iolog(struct thread_data *td);
646extern void log_io_piece(struct thread_data *, struct io_u *);
647extern void prune_io_piece_log(struct thread_data *);
648extern void write_iolog_close(struct thread_data *);
649
650/*
651 * Logging
652 */
653extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
654extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
655extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
656extern void show_run_stats(void);
657extern void init_disk_util(struct thread_data *);
658extern void update_rusage_stat(struct thread_data *);
659extern void update_io_ticks(void);
660extern void disk_util_timer_arm(void);
661extern void setup_log(struct io_log **);
662extern void finish_log(struct thread_data *, struct io_log *, const char *);
663extern void __finish_log(struct io_log *, const char *);
664extern struct io_log *agg_io_log[2];
665extern int write_bw_log;
666extern void add_agg_sample(unsigned long, enum fio_ddir);
667
668/*
669 * Time functions
670 */
671extern unsigned long utime_since(struct timeval *, struct timeval *);
672extern unsigned long utime_since_now(struct timeval *);
673extern unsigned long mtime_since(struct timeval *, struct timeval *);
674extern unsigned long mtime_since_now(struct timeval *);
675extern unsigned long time_since_now(struct timeval *);
676extern unsigned long mtime_since_genesis(void);
677extern void __usec_sleep(unsigned int);
678extern void usec_sleep(struct thread_data *, unsigned long);
679extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
680extern void fill_start_time(struct timeval *);
681extern void fio_gettime(struct timeval *, void *);
682extern void set_genesis_time(void);
683
684/*
685 * Init/option functions
686 */
687extern int __must_check parse_options(int, char **);
688extern int fio_option_parse(struct thread_data *, const char *);
689extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
690extern void fio_fill_default_options(struct thread_data *);
691extern int fio_show_option_help(const char *);
692extern void fio_options_dup_and_init(struct option *);
693#define FIO_GETOPT_JOB 0x89988998
694#define FIO_NR_OPTIONS 128
695
696/*
697 * File setup/shutdown
698 */
699extern void close_files(struct thread_data *);
700extern int __must_check setup_files(struct thread_data *);
701extern int __must_check open_files(struct thread_data *);
702extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
703extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
704extern void generic_close_file(struct thread_data *, struct fio_file *);
705extern void add_file(struct thread_data *, const char *);
706extern void get_file(struct fio_file *);
707extern void put_file(struct thread_data *, struct fio_file *);
708extern int add_dir_files(struct thread_data *, const char *);
709extern int init_random_map(struct thread_data *);
710
711/*
712 * ETA/status stuff
713 */
714extern void print_thread_status(void);
715extern void print_status_init(int);
716
717/*
718 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
719 * will never back again. It may cycle between running/verififying/fsyncing.
720 * Once the thread reaches TD_EXITED, it is just waiting for the core to
721 * reap it.
722 */
723enum {
724 TD_NOT_CREATED = 0,
725 TD_CREATED,
726 TD_INITIALIZED,
727 TD_RUNNING,
728 TD_VERIFYING,
729 TD_FSYNCING,
730 TD_EXITED,
731 TD_REAPED,
732};
733
734/*
735 * Verify helpers
736 */
737extern void populate_verify_io_u(struct thread_data *, struct io_u *);
738extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
739extern int __must_check verify_io_u(struct io_u *);
740
741/*
742 * Memory helpers
743 */
744extern int __must_check fio_pin_memory(void);
745extern void fio_unpin_memory(void);
746extern int __must_check allocate_io_mem(struct thread_data *);
747extern void free_io_mem(struct thread_data *);
748
749/*
750 * io unit handling
751 */
752#define queue_full(td) list_empty(&(td)->io_u_freelist)
753extern struct io_u *__get_io_u(struct thread_data *);
754extern struct io_u *get_io_u(struct thread_data *);
755extern void put_io_u(struct thread_data *, struct io_u *);
756extern void requeue_io_u(struct thread_data *, struct io_u **);
757extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
758extern long __must_check io_u_queued_complete(struct thread_data *, int);
759extern void io_u_queued(struct thread_data *, struct io_u *);
760extern void io_u_log_error(struct thread_data *, struct io_u *);
761extern void io_u_init_timeout(void);
762extern void io_u_set_timeout(struct thread_data *);
763extern void io_u_mark_depth(struct thread_data *, struct io_u *);
764
765/*
766 * io engine entry points
767 */
768extern int __must_check td_io_init(struct thread_data *);
769extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
770extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
771extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
772extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
773extern int __must_check td_io_commit(struct thread_data *);
774extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
775extern void td_io_close_file(struct thread_data *, struct fio_file *);
776
777/*
778 * If logging output to a file, stderr should go to both stderr and f_err
779 */
780#define log_err(args...) do { \
781 fprintf(f_err, ##args); \
782 if (f_err != stderr) \
783 fprintf(stderr, ##args); \
784 } while (0)
785
786#define log_info(args...) fprintf(f_out, ##args)
787
788FILE *get_f_out(void);
789FILE *get_f_err(void);
790
791struct ioengine_ops {
792 struct list_head list;
793 char name[16];
794 int version;
795 int flags;
796 int (*setup)(struct thread_data *);
797 int (*init)(struct thread_data *);
798 int (*prep)(struct thread_data *, struct io_u *);
799 int (*queue)(struct thread_data *, struct io_u *);
800 int (*commit)(struct thread_data *);
801 int (*getevents)(struct thread_data *, int, int, struct timespec *);
802 struct io_u *(*event)(struct thread_data *, int);
803 int (*cancel)(struct thread_data *, struct io_u *);
804 void (*cleanup)(struct thread_data *);
805 int (*open_file)(struct thread_data *, struct fio_file *);
806 void (*close_file)(struct thread_data *, struct fio_file *);
807 void *data;
808 void *dlhandle;
809};
810
811#define FIO_IOOPS_VERSION 6
812
813extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
814extern void register_ioengine(struct ioengine_ops *);
815extern void unregister_ioengine(struct ioengine_ops *);
816extern void close_ioengine(struct thread_data *);
817
818/*
819 * Mark unused variables passed to ops functions as unused, to silence gcc
820 */
821#define fio_unused __attribute((__unused__))
822#define fio_init __attribute__((constructor))
823#define fio_exit __attribute__((destructor))
824
825#define for_each_td(td, i) \
826 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
827#define for_each_file(td, f, i) \
828 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
829
830#define fio_assert(td, cond) do { \
831 if (!(cond)) { \
832 int *__foo = NULL; \
833 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
834 (td)->runstate = TD_EXITED; \
835 (td)->error = EFAULT; \
836 *__foo = 0; \
837 } \
838} while (0)
839
840#endif
fio - Flexible IO Tester