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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
15#include "list.h"
16#include "md5.h"
17#include "crc32.h"
18#include "arch.h"
19#include "os.h"
20
21#ifdef FIO_HAVE_SYSLET
22#include "syslet.h"
23#endif
24
25enum fio_ddir {
26 DDIR_READ = 0,
27 DDIR_WRITE,
28 DDIR_SYNC,
29};
30
31/*
32 * Use for maintaining statistics
33 */
34struct io_stat {
35 unsigned long max_val;
36 unsigned long min_val;
37 unsigned long samples;
38
39 double mean;
40 double S;
41};
42
43/*
44 * A single data sample
45 */
46struct io_sample {
47 unsigned long time;
48 unsigned long val;
49 enum fio_ddir ddir;
50};
51
52/*
53 * Dynamically growing data sample log
54 */
55struct io_log {
56 unsigned long nr_samples;
57 unsigned long max_samples;
58 struct io_sample *log;
59};
60
61/*
62 * When logging io actions, this matches a single sent io_u
63 */
64struct io_piece {
65 struct list_head list;
66 struct fio_file *file;
67 unsigned long long offset;
68 unsigned long len;
69 enum fio_ddir ddir;
70};
71
72#ifdef FIO_HAVE_SYSLET
73struct syslet_req {
74 struct syslet_uatom atom;
75 long ret;
76};
77#endif
78
79/*
80 * The io unit
81 */
82struct io_u {
83 union {
84#ifdef FIO_HAVE_LIBAIO
85 struct iocb iocb;
86#endif
87#ifdef FIO_HAVE_POSIXAIO
88 struct aiocb aiocb;
89#endif
90#ifdef FIO_HAVE_SGIO
91 struct sg_io_hdr hdr;
92#endif
93#ifdef FIO_HAVE_SYSLET
94 struct syslet_req req;
95#endif
96 };
97 struct timeval start_time;
98 struct timeval issue_time;
99
100 /*
101 * Allocated/set buffer and length
102 */
103 void *buf;
104 unsigned long buflen;
105 unsigned long long offset;
106
107 /*
108 * IO engine state, may be different from above when we get
109 * partial transfers / residual data counts
110 */
111 void *xfer_buf;
112 unsigned long xfer_buflen;
113
114 unsigned int resid;
115 unsigned int error;
116
117 enum fio_ddir ddir;
118
119 /*
120 * io engine private data
121 */
122 union {
123 unsigned int index;
124 unsigned int seen;
125 };
126
127 struct fio_file *file;
128
129 struct list_head list;
130};
131
132/*
133 * io_ops->queue() return values
134 */
135enum {
136 FIO_Q_COMPLETED = 0, /* completed sync */
137 FIO_Q_QUEUED = 1, /* queued, will complete async */
138 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
139};
140
141#define FIO_HDR_MAGIC 0xf00baaef
142
143enum {
144 VERIFY_NONE = 0, /* no verification */
145 VERIFY_MD5, /* md5 sum data blocks */
146 VERIFY_CRC32, /* crc32 sum data blocks */
147};
148
149/*
150 * A header structure associated with each checksummed data block
151 */
152struct verify_header {
153 unsigned int fio_magic;
154 unsigned int len;
155 unsigned int verify_type;
156 union {
157 char md5_digest[MD5_HASH_WORDS * 4];
158 unsigned long crc32;
159 };
160};
161
162struct group_run_stats {
163 unsigned long long max_run[2], min_run[2];
164 unsigned long long max_bw[2], min_bw[2];
165 unsigned long long io_kb[2];
166 unsigned long long agg[2];
167};
168
169/*
170 * What type of allocation to use for io buffers
171 */
172enum fio_memtype {
173 MEM_MALLOC = 0, /* ordinary malloc */
174 MEM_SHM, /* use shared memory segments */
175 MEM_SHMHUGE, /* use shared memory segments with huge pages */
176 MEM_MMAP, /* use anonynomous mmap */
177 MEM_MMAPHUGE, /* memory mapped huge file */
178};
179
180/*
181 * The type of object we are working on
182 */
183enum fio_filetype {
184 FIO_TYPE_FILE = 1, /* plain file */
185 FIO_TYPE_BD, /* block device */
186 FIO_TYPE_CHAR, /* character device */
187};
188
189enum fio_ioengine_flags {
190 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
191 FIO_CPUIO = 1 << 1, /* cpu burner, doesn't do real io */
192 FIO_MMAPIO = 1 << 2, /* uses memory mapped io */
193 FIO_RAWIO = 1 << 3, /* some sort of direct/raw io */
194 FIO_NETIO = 1 << 4, /* networked io */
195 FIO_NULLIO = 1 << 5, /* no real data transfer (cpu/null) */
196};
197
198/*
199 * Each thread_data structure has a number of files associated with it,
200 * this structure holds state information for a single file.
201 */
202struct fio_file {
203 /*
204 * A file may not be a file descriptor, let the io engine decide
205 */
206 union {
207 unsigned long file_data;
208 int fd;
209 };
210 char *file_name;
211 void *mmap;
212 unsigned long long file_size;
213 unsigned long long real_file_size;
214 unsigned long long file_offset;
215 unsigned long long last_pos;
216 unsigned long long last_completed_pos;
217
218 /*
219 * block map for random io
220 */
221 unsigned long *file_map;
222 unsigned int num_maps;
223 unsigned int last_free_lookup;
224
225 unsigned int unlink;
226};
227
228struct thread_stat {
229 struct io_log *slat_log;
230 struct io_log *clat_log;
231 struct io_log *bw_log;
232
233 /*
234 * bandwidth and latency stats
235 */
236 struct io_stat clat_stat[2]; /* completion latency */
237 struct io_stat slat_stat[2]; /* submission latency */
238 struct io_stat bw_stat[2]; /* bandwidth stats */
239
240 unsigned long long stat_io_bytes[2];
241 struct timeval stat_sample_time[2];
242
243 /*
244 * fio system usage accounting
245 */
246 struct rusage ru_start;
247 struct rusage ru_end;
248 unsigned long usr_time;
249 unsigned long sys_time;
250 unsigned long ctx;
251};
252
253/*
254 * How many depth levels to log
255 */
256#define FIO_IO_U_MAP_NR 8
257#define FIO_IO_U_LAT_NR 12
258
259/*
260 * This describes a single thread/process executing a fio job.
261 */
262struct thread_data {
263 char *description;
264 char *name;
265 char *directory;
266 char *filename;
267 char verror[80];
268 pthread_t thread;
269 int thread_number;
270 int groupid;
271 struct thread_stat ts;
272 enum fio_filetype filetype;
273 struct fio_file *files;
274 unsigned int nr_files;
275 unsigned int nr_uniq_files;
276 unsigned int next_file;
277 int error;
278 pid_t pid;
279 char *orig_buffer;
280 size_t orig_buffer_size;
281 volatile int terminate;
282 volatile int runstate;
283 enum fio_ddir ddir;
284 unsigned int iomix;
285 unsigned int ioprio;
286 unsigned int last_was_sync;
287
288 unsigned int sequential;
289 unsigned int odirect;
290 unsigned int invalidate_cache;
291 unsigned int create_serialize;
292 unsigned int create_fsync;
293 unsigned int end_fsync;
294 unsigned int sync_io;
295 unsigned int verify;
296 unsigned int use_thread;
297 unsigned int unlink;
298 unsigned int do_disk_util;
299 unsigned int override_sync;
300 unsigned int rand_repeatable;
301 unsigned int write_lat_log;
302 unsigned int write_bw_log;
303 unsigned int norandommap;
304 unsigned int bs_unaligned;
305
306 unsigned int bs[2];
307 unsigned int min_bs[2];
308 unsigned int max_bs[2];
309 unsigned int hugepage_size;
310 unsigned int rw_min_bs;
311 unsigned int thinktime;
312 unsigned int thinktime_spin;
313 unsigned int thinktime_blocks;
314 unsigned int fsync_blocks;
315 unsigned int start_delay;
316 unsigned long timeout;
317 unsigned int overwrite;
318 unsigned int bw_avg_time;
319 unsigned int loops;
320 unsigned long long zone_size;
321 unsigned long long zone_skip;
322 enum fio_memtype mem_type;
323 char *mmapfile;
324 int mmapfd;
325 unsigned int stonewall;
326 unsigned int numjobs;
327 unsigned int iodepth;
328 os_cpu_mask_t cpumask;
329 unsigned int iolog;
330 unsigned int read_iolog;
331 unsigned int rwmixcycle;
332 unsigned int rwmixread;
333 unsigned int rwmixwrite;
334 unsigned int nice;
335
336 char *read_iolog_file;
337 char *write_iolog_file;
338 void *iolog_buf;
339 FILE *iolog_f;
340
341 char *sysfs_root;
342 char *ioscheduler;
343
344 os_random_state_t bsrange_state;
345 os_random_state_t verify_state;
346
347 int shm_id;
348
349 /*
350 * IO engine hooks, contains everything needed to submit an io_u
351 * to any of the available IO engines.
352 */
353 struct ioengine_ops *io_ops;
354
355 /*
356 * Current IO depth and list of free and busy io_u's.
357 */
358 unsigned int cur_depth;
359 unsigned int io_u_map[FIO_IO_U_MAP_NR];
360 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
361 unsigned long total_io_u;
362 struct list_head io_u_freelist;
363 struct list_head io_u_busylist;
364 struct list_head io_u_requeues;
365
366 /*
367 * Rate state
368 */
369 unsigned int rate;
370 unsigned int ratemin;
371 unsigned int ratecycle;
372 unsigned long rate_usec_cycle;
373 long rate_pending_usleep;
374 unsigned long rate_bytes;
375 struct timeval lastrate;
376
377 unsigned long runtime[2]; /* msec */
378 unsigned long long io_size;
379 unsigned long long total_file_size;
380 unsigned long long start_offset;
381 unsigned long long total_io_size;
382
383 unsigned long io_issues[2];
384 unsigned long long io_blocks[2];
385 unsigned long long io_bytes[2];
386 unsigned long long this_io_bytes[2];
387 unsigned long long zone_bytes;
388 volatile int mutex;
389
390 /*
391 * State for random io, a bitmap of blocks done vs not done
392 */
393 os_random_state_t random_state;
394
395 /*
396 * CPU "io" cycle burner
397 */
398 unsigned int cpuload;
399 unsigned int cpucycle;
400
401 struct timeval start; /* start of this loop */
402 struct timeval epoch; /* time job was started */
403 struct timeval end_time;/* time job ended */
404
405 /*
406 * read/write mixed workload state
407 */
408 os_random_state_t rwmix_state;
409 struct timeval rwmix_switch;
410 enum fio_ddir rwmix_ddir;
411
412 /*
413 * Pre-run and post-run shell
414 */
415 char *exec_prerun;
416 char *exec_postrun;
417
418 /*
419 * IO historic logs
420 */
421 struct list_head io_hist_list;
422 struct list_head io_log_list;
423};
424
425#define __td_verror(td, err, msg) \
426 do { \
427 int e = (err); \
428 (td)->error = e; \
429 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, error=%s", __FILE__, __LINE__, (msg)); \
430 } while (0)
431
432
433#define td_verror(td, err) __td_verror((td), (err), strerror((err)))
434#define td_vmsg(td, err, msg) __td_verror((td), (err), (msg))
435
436extern int exitall_on_terminate;
437extern int thread_number;
438extern int shm_id;
439extern int groupid;
440extern int terse_output;
441extern FILE *f_out;
442extern FILE *f_err;
443extern int temp_stall_ts;
444extern unsigned long long mlock_size;
445
446extern struct thread_data *threads;
447
448#define td_read(td) ((td)->ddir == DDIR_READ)
449#define td_write(td) ((td)->ddir == DDIR_WRITE)
450#define td_rw(td) ((td)->iomix != 0)
451
452#define BLOCKS_PER_MAP (8 * sizeof(long))
453#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->rw_min_bs))
454#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
455#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
456
457#define MAX_JOBS (1024)
458
459static inline int should_fsync(struct thread_data *td)
460{
461 if (td->last_was_sync)
462 return 0;
463 if (td->odirect)
464 return 0;
465 if (td_write(td) || td_rw(td) || td->override_sync)
466 return 1;
467
468 return 0;
469}
470
471/*
472 * Disk utils as read in /sys/block/<dev>/stat
473 */
474struct disk_util_stat {
475 unsigned ios[2];
476 unsigned merges[2];
477 unsigned long long sectors[2];
478 unsigned ticks[2];
479 unsigned io_ticks;
480 unsigned time_in_queue;
481};
482
483/*
484 * Per-device disk util management
485 */
486struct disk_util {
487 struct list_head list;
488
489 char *name;
490 char path[256];
491 dev_t dev;
492
493 struct disk_util_stat dus;
494 struct disk_util_stat last_dus;
495
496 unsigned long msec;
497 struct timeval time;
498};
499
500/*
501 * Callback for io completion
502 */
503typedef int (endio_handler)(struct io_u *);
504
505#define DISK_UTIL_MSEC (250)
506
507#ifndef min
508#define min(a, b) ((a) < (b) ? (a) : (b))
509#endif
510#ifndef max
511#define max(a, b) ((a) > (b) ? (a) : (b))
512#endif
513
514/*
515 * Log exports
516 */
517extern int read_iolog_get(struct thread_data *, struct io_u *);
518extern void write_iolog_put(struct thread_data *, struct io_u *);
519extern int init_iolog(struct thread_data *td);
520extern void log_io_piece(struct thread_data *, struct io_u *);
521extern void prune_io_piece_log(struct thread_data *);
522extern void write_iolog_close(struct thread_data *);
523
524/*
525 * Logging
526 */
527extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
528extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
529extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
530extern void show_run_stats(void);
531extern void init_disk_util(struct thread_data *);
532extern void update_rusage_stat(struct thread_data *);
533extern void update_io_ticks(void);
534extern void disk_util_timer_arm(void);
535extern void setup_log(struct io_log **);
536extern void finish_log(struct thread_data *, struct io_log *, const char *);
537extern void __finish_log(struct io_log *, const char *);
538extern int setup_rate(struct thread_data *);
539extern struct io_log *agg_io_log[2];
540extern int write_bw_log;
541extern void add_agg_sample(unsigned long, enum fio_ddir);
542
543/*
544 * Time functions
545 */
546extern unsigned long utime_since(struct timeval *, struct timeval *);
547extern unsigned long utime_since_now(struct timeval *);
548extern unsigned long mtime_since(struct timeval *, struct timeval *);
549extern unsigned long mtime_since_now(struct timeval *);
550extern unsigned long time_since_now(struct timeval *);
551extern unsigned long mtime_since_genesis(void);
552extern void __usec_sleep(unsigned int);
553extern void usec_sleep(struct thread_data *, unsigned long);
554extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
555extern void fill_start_time(struct timeval *);
556extern void fio_gettime(struct timeval *, void *);
557
558/*
559 * Init functions
560 */
561extern int parse_options(int, char **);
562extern int init_random_state(struct thread_data *);
563
564/*
565 * File setup/shutdown
566 */
567extern void close_files(struct thread_data *);
568extern int setup_files(struct thread_data *);
569extern int open_files(struct thread_data *);
570extern int file_invalidate_cache(struct thread_data *, struct fio_file *);
571
572/*
573 * ETA/status stuff
574 */
575extern void print_thread_status(void);
576extern void print_status_init(int);
577
578/*
579 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
580 * will never back again. It may cycle between running/verififying/fsyncing.
581 * Once the thread reaches TD_EXITED, it is just waiting for the core to
582 * reap it.
583 */
584enum {
585 TD_NOT_CREATED = 0,
586 TD_CREATED,
587 TD_INITIALIZED,
588 TD_RUNNING,
589 TD_VERIFYING,
590 TD_FSYNCING,
591 TD_EXITED,
592 TD_REAPED,
593};
594
595/*
596 * Verify helpers
597 */
598extern void populate_verify_io_u(struct thread_data *, struct io_u *);
599extern int get_next_verify(struct thread_data *td, struct io_u *);
600extern int verify_io_u(struct io_u *);
601
602/*
603 * Memory helpers
604 */
605extern int fio_pin_memory(void);
606extern void fio_unpin_memory(void);
607extern int allocate_io_mem(struct thread_data *);
608extern void free_io_mem(struct thread_data *);
609
610/*
611 * io unit handling
612 */
613#define queue_full(td) list_empty(&(td)->io_u_freelist)
614extern struct io_u *__get_io_u(struct thread_data *);
615extern struct io_u *get_io_u(struct thread_data *);
616extern void put_io_u(struct thread_data *, struct io_u *);
617extern void requeue_io_u(struct thread_data *, struct io_u **);
618extern long io_u_sync_complete(struct thread_data *, struct io_u *, endio_handler *);
619extern long io_u_queued_complete(struct thread_data *, int, endio_handler *);
620extern void io_u_queued(struct thread_data *, struct io_u *);
621
622/*
623 * io engine entry points
624 */
625extern int td_io_init(struct thread_data *);
626extern int td_io_prep(struct thread_data *, struct io_u *);
627extern int td_io_queue(struct thread_data *, struct io_u *);
628extern int td_io_sync(struct thread_data *, struct fio_file *);
629extern int td_io_getevents(struct thread_data *, int, int, struct timespec *);
630extern int td_io_commit(struct thread_data *);
631
632/*
633 * This is a pretty crappy semaphore implementation, but with the use that fio
634 * has (just signalling start/go conditions), it doesn't have to be better.
635 * Naturally this would not work for any type of contended semaphore or
636 * for real locking.
637 */
638static inline void fio_sem_init(volatile int *sem, int val)
639{
640 *sem = val;
641}
642
643static inline void fio_sem_down(volatile int *sem)
644{
645 while (*sem == 0)
646 usleep(10000);
647
648 (*sem)--;
649}
650
651static inline void fio_sem_up(volatile int *sem)
652{
653 (*sem)++;
654}
655
656/*
657 * If logging output to a file, stderr should go to both stderr and f_err
658 */
659#define log_err(args...) do { \
660 fprintf(f_err, ##args); \
661 if (f_err != stderr) \
662 fprintf(stderr, ##args); \
663 } while (0)
664
665struct ioengine_ops {
666 struct list_head list;
667 char name[16];
668 int version;
669 int flags;
670 int (*setup)(struct thread_data *);
671 int (*init)(struct thread_data *);
672 int (*prep)(struct thread_data *, struct io_u *);
673 int (*queue)(struct thread_data *, struct io_u *);
674 int (*commit)(struct thread_data *);
675 int (*getevents)(struct thread_data *, int, int, struct timespec *);
676 struct io_u *(*event)(struct thread_data *, int);
677 int (*cancel)(struct thread_data *, struct io_u *);
678 void (*cleanup)(struct thread_data *);
679 void *data;
680 void *dlhandle;
681 unsigned long priv;
682};
683
684#define FIO_IOOPS_VERSION 5
685
686extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
687extern int register_ioengine(struct ioengine_ops *);
688extern void unregister_ioengine(struct ioengine_ops *);
689extern void close_ioengine(struct thread_data *);
690
691/*
692 * Mark unused variables passed to ops functions as unused, to silence gcc
693 */
694#define fio_unused __attribute((__unused__))
695#define fio_init __attribute__((constructor))
696#define fio_exit __attribute__((destructor))
697
698#define for_each_td(td, i) \
699 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
700#define for_each_file(td, f, i) \
701 for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
702
703#define fio_assert(td, cond) do { \
704 if (!(cond)) { \
705 int *__foo = NULL; \
706 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
707 (td)->runstate = TD_EXITED; \
708 (td)->error = EFAULT; \
709 *__foo = 0; \
710 } \
711} while (0)
712
713#endif
fio - Flexible IO Tester