blob: 5bb5569584cc289d49bb9afd9831ba05bd98d0ee [file] [log] [blame]
Jens Axboeebac4652005-12-08 15:25:21 +01001#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>
Jens Axboe3c39a372006-06-06 20:56:12 +02009#include <errno.h>
10#include <stdlib.h>
11#include <stdio.h>
Jens Axboe6d6f0312006-06-07 21:39:13 +020012#include <unistd.h>
Jens Axboeebac4652005-12-08 15:25:21 +010013
14#include "list.h"
15#include "md5.h"
16#include "crc32.h"
17#include "arch.h"
18#include "os.h"
19
20struct io_stat {
21 unsigned long val;
22 unsigned long val_sq;
23 unsigned long max_val;
24 unsigned long min_val;
25 unsigned long samples;
26};
27
28struct io_sample {
29 unsigned long time;
30 unsigned long val;
31 unsigned int ddir;
32};
33
34struct io_log {
35 unsigned long nr_samples;
36 unsigned long max_samples;
37 struct io_sample *log;
38};
39
40struct io_piece {
41 struct list_head list;
Jens Axboe53cdc682006-10-18 11:50:58 +020042 struct fio_file *file;
Jens Axboeebac4652005-12-08 15:25:21 +010043 unsigned long long offset;
44 unsigned int len;
Jens Axboeaea47d42006-05-26 19:27:29 +020045 int ddir;
Jens Axboeebac4652005-12-08 15:25:21 +010046};
47
48/*
49 * The io unit
50 */
51struct io_u {
52 union {
53#ifdef FIO_HAVE_LIBAIO
54 struct iocb iocb;
55#endif
56#ifdef FIO_HAVE_POSIXAIO
57 struct aiocb aiocb;
58#endif
59#ifdef FIO_HAVE_SGIO
60 struct sg_io_hdr hdr;
61#endif
62 };
63 struct timeval start_time;
64 struct timeval issue_time;
65
Jens Axboe6b9cea22006-10-30 17:00:24 +010066 void *buf;
Jens Axboeebac4652005-12-08 15:25:21 +010067 unsigned int buflen;
68 unsigned long long offset;
69
70 unsigned int resid;
71 unsigned int error;
72
Jens Axboeebac4652005-12-08 15:25:21 +010073 unsigned char ddir;
74
Jens Axboedfd7bc22006-10-24 12:17:57 +020075 /*
76 * io engine private data
77 */
78 union {
79 unsigned int index;
80 unsigned int seen;
81 };
82
Jens Axboe53cdc682006-10-18 11:50:58 +020083 struct fio_file *file;
84
Jens Axboeebac4652005-12-08 15:25:21 +010085 struct list_head list;
86};
87
88#define FIO_HDR_MAGIC 0xf00baaef
89
90enum {
91 VERIFY_NONE = 0,
92 VERIFY_MD5,
93 VERIFY_CRC32,
94};
95
96struct verify_header {
97 unsigned int fio_magic;
98 unsigned int len;
99 unsigned int verify_type;
100 union {
101 char md5_digest[MD5_HASH_WORDS * 4];
102 unsigned long crc32;
103 };
104};
105
106struct group_run_stats {
Jens Axboe9104f872005-12-28 23:50:45 +0100107 unsigned long long max_run[2], min_run[2];
108 unsigned long long max_bw[2], min_bw[2];
Jens Axboee9b2a3f2006-06-06 15:38:33 +0200109 unsigned long long io_kb[2];
Jens Axboe9104f872005-12-28 23:50:45 +0100110 unsigned long long agg[2];
Jens Axboeebac4652005-12-08 15:25:21 +0100111};
112
Jens Axboee9c047a2006-06-07 21:13:04 +0200113enum fio_ddir {
114 DDIR_READ = 0,
115 DDIR_WRITE,
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200116 DDIR_SYNC,
Jens Axboee9c047a2006-06-07 21:13:04 +0200117};
118
119/*
120 * What type of allocation to use for io buffers
121 */
122enum fio_memtype {
123 MEM_MALLOC = 0, /* ordinary malloc */
124 MEM_SHM, /* use shared memory segments */
125 MEM_MMAP, /* use anonynomous mmap */
126};
127
128/*
129 * The type of object we are working on
130 */
131enum fio_filetype {
132 FIO_TYPE_FILE = 1,
133 FIO_TYPE_BD,
134 FIO_TYPE_CHAR,
135};
136
Jens Axboe2866c822006-10-09 15:57:48 +0200137enum fio_ioengine_flags {
Jens Axboee9c047a2006-06-07 21:13:04 +0200138 FIO_SYNCIO = 1 << 0,
Jens Axboe2866c822006-10-09 15:57:48 +0200139 FIO_CPUIO = 1 << 1,
140 FIO_MMAPIO = 1 << 2,
Jens Axboeb2a15192006-10-18 14:10:42 +0200141 FIO_RAWIO = 1 << 3,
Jens Axboee9c047a2006-06-07 21:13:04 +0200142};
143
Jens Axboe53cdc682006-10-18 11:50:58 +0200144struct fio_file {
145 /*
146 * A file may not be a file descriptor, let the io engine decide
147 */
148 union {
149 unsigned long file_data;
150 int fd;
151 };
152 char *file_name;
153 void *mmap;
154 unsigned long long file_size;
155 unsigned long long real_file_size;
156 unsigned long long file_offset;
157 unsigned long long last_pos;
158
159 unsigned long *file_map;
160 unsigned int num_maps;
161};
162
Jens Axboee9c047a2006-06-07 21:13:04 +0200163/*
164 * This describes a single thread/process executing a fio job.
165 */
Jens Axboeebac4652005-12-08 15:25:21 +0100166struct thread_data {
Jens Axboeb4692822006-10-27 13:43:22 +0200167 char *name;
Jens Axboeef899b62006-06-06 09:31:00 +0200168 char *directory;
Jens Axboe13f8e2d2006-10-24 09:29:45 +0200169 char *filename;
Jens Axboeebac4652005-12-08 15:25:21 +0100170 char verror[80];
171 pthread_t thread;
172 int thread_number;
173 int groupid;
Jens Axboee9c047a2006-06-07 21:13:04 +0200174 enum fio_filetype filetype;
Jens Axboe53cdc682006-10-18 11:50:58 +0200175 struct fio_file *files;
176 unsigned int nr_files;
Jens Axboe13f8e2d2006-10-24 09:29:45 +0200177 unsigned int nr_uniq_files;
Jens Axboe53cdc682006-10-18 11:50:58 +0200178 unsigned int next_file;
Jens Axboeebac4652005-12-08 15:25:21 +0100179 int error;
Jens Axboeebac4652005-12-08 15:25:21 +0100180 pid_t pid;
181 char *orig_buffer;
182 size_t orig_buffer_size;
183 volatile int terminate;
184 volatile int runstate;
Jens Axboee9c047a2006-06-07 21:13:04 +0200185 enum fio_ddir ddir;
Jens Axboe3d60d1e2006-05-25 06:31:06 +0200186 unsigned int iomix;
Jens Axboeebac4652005-12-08 15:25:21 +0100187 unsigned int ioprio;
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200188 unsigned int last_was_sync;
Jens Axboee9c047a2006-06-07 21:13:04 +0200189
Jens Axboe9158d2f2006-10-27 14:27:39 +0200190 unsigned int sequential;
191 unsigned int odirect;
192 unsigned int invalidate_cache;
193 unsigned int create_serialize;
194 unsigned int create_fsync;
195 unsigned int end_fsync;
196 unsigned int sync_io;
197 unsigned int verify;
198 unsigned int use_thread;
199 unsigned int unlink;
200 unsigned int do_disk_util;
201 unsigned int override_sync;
202 unsigned int rand_repeatable;
203 unsigned int write_lat_log;
204 unsigned int write_bw_log;
Jens Axboebb8895e2006-10-30 15:14:48 +0100205 unsigned int norandommap;
Jens Axboe690adba2006-10-30 15:25:09 +0100206 unsigned int bs_unaligned;
Jens Axboee9c047a2006-06-07 21:13:04 +0200207
Jens Axboea00735e2006-11-03 08:58:08 +0100208 unsigned int bs[2];
209 unsigned int min_bs[2];
210 unsigned int max_bs[2];
211 unsigned int rw_min_bs;
Jens Axboeebac4652005-12-08 15:25:21 +0100212 unsigned int thinktime;
213 unsigned int fsync_blocks;
214 unsigned int start_delay;
Jens Axboe906c8d72006-06-13 09:37:56 +0200215 unsigned long timeout;
Jens Axboeebac4652005-12-08 15:25:21 +0100216 unsigned int overwrite;
Jens Axboeebac4652005-12-08 15:25:21 +0100217 unsigned int bw_avg_time;
Jens Axboeebac4652005-12-08 15:25:21 +0100218 unsigned int loops;
Jens Axboe20dc95c2005-12-09 10:29:35 +0100219 unsigned long long zone_size;
220 unsigned long long zone_skip;
Jens Axboee9c047a2006-06-07 21:13:04 +0200221 enum fio_memtype mem_type;
Jens Axboeebac4652005-12-08 15:25:21 +0100222 unsigned int stonewall;
223 unsigned int numjobs;
Jens Axboeebac4652005-12-08 15:25:21 +0100224 unsigned int iodepth;
225 os_cpu_mask_t cpumask;
Jens Axboeaea47d42006-05-26 19:27:29 +0200226 unsigned int iolog;
Jens Axboe843a7412006-06-01 21:14:21 -0700227 unsigned int read_iolog;
Jens Axboea6ccc7b2006-06-02 10:14:15 +0200228 unsigned int rwmixcycle;
229 unsigned int rwmixread;
Jens Axboee1f36502006-10-27 10:54:08 +0200230 unsigned int rwmixwrite;
Jens Axboeb6f4d882006-06-02 10:32:51 +0200231 unsigned int nice;
Jens Axboeaea47d42006-05-26 19:27:29 +0200232
Jens Axboe076efc72006-10-27 11:24:25 +0200233 char *read_iolog_file;
234 char *write_iolog_file;
Jens Axboe843a7412006-06-01 21:14:21 -0700235 void *iolog_buf;
236 FILE *iolog_f;
Jens Axboeebac4652005-12-08 15:25:21 +0100237
Jens Axboeda867742006-06-06 10:39:10 -0700238 char *sysfs_root;
Jens Axboeda867742006-06-06 10:39:10 -0700239 char *ioscheduler;
240
Jens Axboe6dfd46b2006-06-07 13:57:06 +0200241 os_random_state_t bsrange_state;
242 os_random_state_t verify_state;
Jens Axboeebac4652005-12-08 15:25:21 +0100243
244 int shm_id;
245
Jens Axboee9c047a2006-06-07 21:13:04 +0200246 /*
247 * IO engine hooks, contains everything needed to submit an io_u
248 * to any of the available IO engines.
249 */
Jens Axboe2866c822006-10-09 15:57:48 +0200250 struct ioengine_ops *io_ops;
Jens Axboeebac4652005-12-08 15:25:21 +0100251
Jens Axboee9c047a2006-06-07 21:13:04 +0200252 /*
253 * Current IO depth and list of free and busy io_u's.
254 */
Jens Axboeebac4652005-12-08 15:25:21 +0100255 unsigned int cur_depth;
256 struct list_head io_u_freelist;
257 struct list_head io_u_busylist;
258
Jens Axboee9c047a2006-06-07 21:13:04 +0200259 /*
260 * Rate state
261 */
Jens Axboeebac4652005-12-08 15:25:21 +0100262 unsigned int rate;
263 unsigned int ratemin;
264 unsigned int ratecycle;
265 unsigned long rate_usec_cycle;
266 long rate_pending_usleep;
267 unsigned long rate_bytes;
268 struct timeval lastrate;
269
270 unsigned long runtime[2]; /* msec */
271 unsigned long long io_size;
Jens Axboe53cdc682006-10-18 11:50:58 +0200272 unsigned long long total_file_size;
273 unsigned long long start_offset;
Jens Axboeebac4652005-12-08 15:25:21 +0100274 unsigned long long total_io_size;
275
Jens Axboe9104f872005-12-28 23:50:45 +0100276 unsigned long long io_blocks[2];
277 unsigned long long io_bytes[2];
278 unsigned long long zone_bytes;
279 unsigned long long this_io_bytes[2];
Jens Axboebbfd6b02006-06-07 19:42:54 +0200280 volatile int mutex;
Jens Axboeebac4652005-12-08 15:25:21 +0100281
Jens Axboee9c047a2006-06-07 21:13:04 +0200282 /*
283 * State for random io, a bitmap of blocks done vs not done
284 */
Jens Axboe6dfd46b2006-06-07 13:57:06 +0200285 os_random_state_t random_state;
Jens Axboeebac4652005-12-08 15:25:21 +0100286
287 /*
Jens Axboeb990b5c2006-09-14 09:48:22 +0200288 * CPU "io" cycle burner
289 */
290 unsigned int cpuload;
291 unsigned int cpucycle;
292
293 /*
Jens Axboeebac4652005-12-08 15:25:21 +0100294 * bandwidth and latency stats
295 */
296 struct io_stat clat_stat[2]; /* completion latency */
297 struct io_stat slat_stat[2]; /* submission latency */
298 struct io_stat bw_stat[2]; /* bandwidth stats */
299
Jens Axboe9104f872005-12-28 23:50:45 +0100300 unsigned long long stat_io_bytes[2];
Jens Axboeebac4652005-12-08 15:25:21 +0100301 struct timeval stat_sample_time[2];
302
303 struct io_log *slat_log;
304 struct io_log *clat_log;
305 struct io_log *bw_log;
306
307 struct timeval start; /* start of this loop */
308 struct timeval epoch; /* time job was started */
309
Jens Axboee9c047a2006-06-07 21:13:04 +0200310 /*
311 * fio system usage accounting
312 */
Jens Axboeebac4652005-12-08 15:25:21 +0100313 struct rusage ru_start;
314 struct rusage ru_end;
315 unsigned long usr_time;
316 unsigned long sys_time;
317 unsigned long ctx;
318
Jens Axboee9c047a2006-06-07 21:13:04 +0200319 /*
320 * read/write mixed workload state
321 */
Jens Axboe6dfd46b2006-06-07 13:57:06 +0200322 os_random_state_t rwmix_state;
Jens Axboea6ccc7b2006-06-02 10:14:15 +0200323 struct timeval rwmix_switch;
Jens Axboee9c047a2006-06-07 21:13:04 +0200324 enum fio_ddir rwmix_ddir;
Jens Axboea6ccc7b2006-06-02 10:14:15 +0200325
Jens Axboe4e0ba8a2006-06-06 09:36:28 +0200326 /*
327 * Pre-run and post-run shell
328 */
329 char *exec_prerun;
330 char *exec_postrun;
331
Jens Axboee9c047a2006-06-07 21:13:04 +0200332 /*
333 * IO historic logs
334 */
Jens Axboeebac4652005-12-08 15:25:21 +0100335 struct list_head io_hist_list;
Jens Axboeaea47d42006-05-26 19:27:29 +0200336 struct list_head io_log_list;
Jens Axboeebac4652005-12-08 15:25:21 +0100337};
338
Jens Axboeb990b5c2006-09-14 09:48:22 +0200339#define __td_verror(td, err, msg) \
Jens Axboeebac4652005-12-08 15:25:21 +0100340 do { \
341 int e = (err); \
342 (td)->error = e; \
Jens Axboeb990b5c2006-09-14 09:48:22 +0200343 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, error=%s", __FILE__, __LINE__, (msg)); \
Jens Axboeebac4652005-12-08 15:25:21 +0100344 } while (0)
345
Jens Axboeb990b5c2006-09-14 09:48:22 +0200346
347#define td_verror(td, err) __td_verror((td), (err), strerror((err)))
348#define td_vmsg(td, err, msg) __td_verror((td), (err), (msg))
349
Jens Axboeebac4652005-12-08 15:25:21 +0100350extern int rate_quit;
Jens Axboeebac4652005-12-08 15:25:21 +0100351extern int exitall_on_terminate;
352extern int thread_number;
353extern int shm_id;
354extern int groupid;
Jens Axboec6ae0a52006-06-12 11:04:44 +0200355extern int terse_output;
Jens Axboeeb8bbf42006-06-08 21:40:11 +0200356extern FILE *f_out;
357extern FILE *f_err;
Jens Axboec1d57252006-10-09 19:56:04 +0200358extern char *fio_inst_prefix;
Jens Axboe53cdc682006-10-18 11:50:58 +0200359extern int temp_stall_ts;
Jens Axboeebac4652005-12-08 15:25:21 +0100360
361extern struct thread_data *threads;
362
Jens Axboeebac4652005-12-08 15:25:21 +0100363#define td_read(td) ((td)->ddir == DDIR_READ)
364#define td_write(td) ((td)->ddir == DDIR_WRITE)
Jens Axboe3d60d1e2006-05-25 06:31:06 +0200365#define td_rw(td) ((td)->iomix != 0)
Jens Axboeebac4652005-12-08 15:25:21 +0100366
367#define BLOCKS_PER_MAP (8 * sizeof(long))
Jens Axboea00735e2006-11-03 08:58:08 +0100368#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->rw_min_bs))
Jens Axboe53cdc682006-10-18 11:50:58 +0200369#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
370#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
Jens Axboeebac4652005-12-08 15:25:21 +0100371
372#define MAX_JOBS (1024)
373
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200374static inline int should_fsync(struct thread_data *td)
375{
376 if (td->last_was_sync)
377 return 0;
378 if (td->odirect)
379 return 0;
380 if (td_write(td) || td_rw(td) || td->override_sync)
381 return 1;
382
383 return 0;
384}
385
Jens Axboeebac4652005-12-08 15:25:21 +0100386struct disk_util_stat {
387 unsigned ios[2];
388 unsigned merges[2];
389 unsigned long long sectors[2];
390 unsigned ticks[2];
391 unsigned io_ticks;
392 unsigned time_in_queue;
393};
394
395struct disk_util {
396 struct list_head list;
397
398 char *name;
399 char path[256];
400 dev_t dev;
401
402 struct disk_util_stat dus;
403 struct disk_util_stat last_dus;
404
405 unsigned long msec;
406 struct timeval time;
407};
408
409struct io_completion_data {
410 int nr; /* input */
411
412 int error; /* output */
413 unsigned long bytes_done[2]; /* output */
414};
415
416#define DISK_UTIL_MSEC (250)
417
Jens Axboe6a0106a2006-05-05 10:34:43 +0200418#ifndef min
419#define min(a, b) ((a) < (b) ? (a) : (b))
420#endif
Jens Axboea00735e2006-11-03 08:58:08 +0100421#ifndef max
422#define max(a, b) ((a) > (b) ? (a) : (b))
423#endif
Jens Axboe6a0106a2006-05-05 10:34:43 +0200424
Jens Axboe67962092006-06-07 08:45:01 +0200425/*
426 * Log exports
427 */
428extern int read_iolog_get(struct thread_data *, struct io_u *);
429extern void write_iolog_put(struct thread_data *, struct io_u *);
430extern int init_iolog(struct thread_data *td);
431extern void log_io_piece(struct thread_data *, struct io_u *);
432extern void prune_io_piece_log(struct thread_data *);
433extern void write_iolog_close(struct thread_data *);
434
435/*
436 * Logging
437 */
438extern void add_clat_sample(struct thread_data *, int, unsigned long);
439extern void add_slat_sample(struct thread_data *, int, unsigned long);
440extern void add_bw_sample(struct thread_data *, int);
441extern void show_run_stats(void);
442extern void init_disk_util(struct thread_data *);
443extern void update_rusage_stat(struct thread_data *);
444extern void update_io_ticks(void);
445extern void disk_util_timer_arm(void);
Jens Axboe8914a9d2006-06-07 11:14:56 +0200446extern void setup_log(struct io_log **);
447extern void finish_log(struct thread_data *, struct io_log *, const char *);
448extern int setup_rate(struct thread_data *);
Jens Axboe67962092006-06-07 08:45:01 +0200449
450/*
451 * Time functions
452 */
Jens Axboe263e5292006-10-18 15:37:01 +0200453extern void time_init(void);
Jens Axboe67962092006-06-07 08:45:01 +0200454extern unsigned long utime_since(struct timeval *, struct timeval *);
455extern unsigned long mtime_since(struct timeval *, struct timeval *);
456extern unsigned long mtime_since_now(struct timeval *);
457extern unsigned long time_since_now(struct timeval *);
Jens Axboe263e5292006-10-18 15:37:01 +0200458extern unsigned long mtime_since_genesis(void);
Jens Axboeb990b5c2006-09-14 09:48:22 +0200459extern void __usec_sleep(unsigned int);
Jens Axboe67962092006-06-07 08:45:01 +0200460extern void usec_sleep(struct thread_data *, unsigned long);
Jens Axboea00735e2006-11-03 08:58:08 +0100461extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
Jens Axboe6043c572006-11-03 11:37:47 +0100462extern void fill_start_time(struct timeval *);
Jens Axboe67962092006-06-07 08:45:01 +0200463
Jens Axboe8914a9d2006-06-07 11:14:56 +0200464/*
465 * Init functions
466 */
467extern int parse_options(int, char **);
468extern int init_random_state(struct thread_data *);
469
Jens Axboebbfd6b02006-06-07 19:42:54 +0200470/*
Jens Axboe53cdc682006-10-18 11:50:58 +0200471 * File setup/shutdown
472 */
473extern void close_files(struct thread_data *);
474extern int setup_files(struct thread_data *);
Jens Axboee5b401d2006-10-18 16:03:40 +0200475extern int file_invalidate_cache(struct thread_data *, struct fio_file *);
Jens Axboe53cdc682006-10-18 11:50:58 +0200476
477/*
Jens Axboe263e5292006-10-18 15:37:01 +0200478 * ETA/status stuff
479 */
480extern void print_thread_status(void);
481extern void print_status_init(int);
482
483/*
484 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
485 * will never back again. It may cycle between running/verififying/fsyncing.
486 * Once the thread reaches TD_EXITED, it is just waiting for the core to
487 * reap it.
488 */
489enum {
490 TD_NOT_CREATED = 0,
491 TD_CREATED,
492 TD_INITIALIZED,
493 TD_RUNNING,
494 TD_VERIFYING,
495 TD_FSYNCING,
496 TD_EXITED,
497 TD_REAPED,
498};
499
500/*
Jens Axboee29d1b72006-10-18 15:43:15 +0200501 * Verify helpers
502 */
503extern void populate_verify_io_u(struct thread_data *, struct io_u *);
504extern int get_next_verify(struct thread_data *td, struct io_u *);
Jens Axboea9619d42006-10-18 15:47:42 +0200505extern int do_io_u_verify(struct thread_data *, struct io_u **);
Jens Axboee29d1b72006-10-18 15:43:15 +0200506
507/*
Jens Axboe2f9ade32006-10-20 11:25:52 +0200508 * Memory helpers
509 */
510extern int fio_pin_memory(void);
511extern void fio_unpin_memory(void);
512extern int allocate_io_mem(struct thread_data *);
513extern void free_io_mem(struct thread_data *);
514
515/*
Jens Axboe10ba5352006-10-20 11:39:27 +0200516 * io unit handling
517 */
518#define queue_full(td) list_empty(&(td)->io_u_freelist)
519extern struct io_u *__get_io_u(struct thread_data *);
520extern struct io_u *get_io_u(struct thread_data *, struct fio_file *);
521extern void put_io_u(struct thread_data *, struct io_u *);
522extern void ios_completed(struct thread_data *, struct io_completion_data *);
523extern void io_completed(struct thread_data *, struct io_u *, struct io_completion_data *);
524
525/*
526 * io engine entry points
527 */
Jens Axboe8c16d842006-10-20 11:48:33 +0200528extern int td_io_init(struct thread_data *);
Jens Axboe10ba5352006-10-20 11:39:27 +0200529extern int td_io_prep(struct thread_data *, struct io_u *);
530extern int td_io_queue(struct thread_data *, struct io_u *);
531extern int td_io_sync(struct thread_data *, struct fio_file *);
532extern int td_io_getevents(struct thread_data *, int, int, struct timespec *);
533
534/*
Jens Axboebbfd6b02006-06-07 19:42:54 +0200535 * This is a pretty crappy semaphore implementation, but with the use that fio
536 * has (just signalling start/go conditions), it doesn't have to be better.
537 * Naturally this would not work for any type of contended semaphore or
538 * for real locking.
539 */
Jens Axboe1056eaa2006-07-13 10:33:45 -0700540static inline void fio_sem_init(volatile int *sem, int val)
Jens Axboebbfd6b02006-06-07 19:42:54 +0200541{
542 *sem = val;
543}
544
Jens Axboe1056eaa2006-07-13 10:33:45 -0700545static inline void fio_sem_down(volatile int *sem)
Jens Axboebbfd6b02006-06-07 19:42:54 +0200546{
547 while (*sem == 0)
548 usleep(10000);
549
550 (*sem)--;
551}
552
Jens Axboe1056eaa2006-07-13 10:33:45 -0700553static inline void fio_sem_up(volatile int *sem)
Jens Axboebbfd6b02006-06-07 19:42:54 +0200554{
555 (*sem)++;
556}
557
Jens Axboe3b70d7e2006-06-08 21:48:46 +0200558/*
559 * If logging output to a file, stderr should go to both stderr and f_err
560 */
561#define log_err(args...) do { \
562 fprintf(f_err, ##args); \
563 if (f_err != stderr) \
564 fprintf(stderr, ##args); \
565 } while (0)
566
Jens Axboe2866c822006-10-09 15:57:48 +0200567struct ioengine_ops {
568 char name[16];
569 int version;
570 int flags;
Jens Axboeea2877a2006-10-10 08:30:24 +0200571 int (*setup)(struct thread_data *);
Jens Axboe2866c822006-10-09 15:57:48 +0200572 int (*init)(struct thread_data *);
573 int (*prep)(struct thread_data *, struct io_u *);
574 int (*queue)(struct thread_data *, struct io_u *);
575 int (*getevents)(struct thread_data *, int, int, struct timespec *);
576 struct io_u *(*event)(struct thread_data *, int);
577 int (*cancel)(struct thread_data *, struct io_u *);
578 void (*cleanup)(struct thread_data *);
Jens Axboe2866c822006-10-09 15:57:48 +0200579 void *data;
580 void *dlhandle;
581};
582
Jens Axboe87dc1ab2006-10-24 14:41:26 +0200583#define FIO_IOOPS_VERSION 3
Jens Axboe2866c822006-10-09 15:57:48 +0200584
Jens Axboeb4692822006-10-27 13:43:22 +0200585extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
Jens Axboe2866c822006-10-09 15:57:48 +0200586extern void close_ioengine(struct thread_data *);
587
588/*
589 * Mark unused variables passed to ops functions as unused, to silence gcc
590 */
591#define fio_unused __attribute((__unused__))
592
Jens Axboe34572e22006-10-20 09:33:18 +0200593#define for_each_td(td, i) \
594 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
Jens Axboe53cdc682006-10-18 11:50:58 +0200595#define for_each_file(td, f, i) \
Jens Axboe34572e22006-10-20 09:33:18 +0200596 for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
Jens Axboe53cdc682006-10-18 11:50:58 +0200597
Jens Axboeebac4652005-12-08 15:25:21 +0100598#endif