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