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