[PATCH] Catch processes/threads that unexpectedly exited
[fio.git] / fio.h
CommitLineData
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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>
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9#include <errno.h>
10#include <stdlib.h>
11#include <stdio.h>
6d6f031f 12#include <unistd.h>
34cfcdaf 13#include <string.h>
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14
15#include "list.h"
16#include "md5.h"
17#include "crc32.h"
18#include "arch.h"
19#include "os.h"
20
b6959b55 21#ifdef FIO_HAVE_SYSLET
a4f4fdd7 22#include "syslet.h"
b6959b55 23#endif
a4f4fdd7 24
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25enum fio_ddir {
26 DDIR_READ = 0,
27 DDIR_WRITE,
28 DDIR_SYNC,
29};
30
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31/*
32 * Use for maintaining statistics
33 */
ebac4655 34struct io_stat {
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35 unsigned long max_val;
36 unsigned long min_val;
37 unsigned long samples;
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38
39 double mean;
40 double S;
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41};
42
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43/*
44 * A single data sample
45 */
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46struct io_sample {
47 unsigned long time;
48 unsigned long val;
1e97cce9 49 enum fio_ddir ddir;
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50};
51
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52/*
53 * Dynamically growing data sample log
54 */
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55struct io_log {
56 unsigned long nr_samples;
57 unsigned long max_samples;
58 struct io_sample *log;
59};
60
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61/*
62 * When logging io actions, this matches a single sent io_u
63 */
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64struct io_piece {
65 struct list_head list;
53cdc686 66 struct fio_file *file;
ebac4655 67 unsigned long long offset;
a4f4fdd7 68 unsigned long len;
1e97cce9 69 enum fio_ddir ddir;
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70};
71
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72#ifdef FIO_HAVE_SYSLET
73struct syslet_req {
74 struct syslet_uatom atom;
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75 long ret;
76};
77#endif
78
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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;
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92#endif
93#ifdef FIO_HAVE_SYSLET
a2e1b08a 94 struct syslet_req req;
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95#endif
96 };
97 struct timeval start_time;
98 struct timeval issue_time;
99
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100 /*
101 * Allocated/set buffer and length
102 */
6b9cea23 103 void *buf;
a4f4fdd7 104 unsigned long buflen;
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105 unsigned long long offset;
106
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107 /*
108 * IO engine state, may be different from above when we get
109 * partial transfers / residual data counts
110 */
cec6b55d 111 void *xfer_buf;
a4f4fdd7 112 unsigned long xfer_buflen;
cec6b55d 113
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114 unsigned int resid;
115 unsigned int error;
116
1e97cce9 117 enum fio_ddir ddir;
ebac4655 118
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119 /*
120 * io engine private data
121 */
122 union {
123 unsigned int index;
124 unsigned int seen;
125 };
126
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127 struct fio_file *file;
128
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129 struct list_head list;
130};
131
132#define FIO_HDR_MAGIC 0xf00baaef
133
134enum {
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135 VERIFY_NONE = 0, /* no verification */
136 VERIFY_MD5, /* md5 sum data blocks */
137 VERIFY_CRC32, /* crc32 sum data blocks */
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138};
139
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140/*
141 * A header structure associated with each checksummed data block
142 */
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143struct verify_header {
144 unsigned int fio_magic;
145 unsigned int len;
146 unsigned int verify_type;
147 union {
148 char md5_digest[MD5_HASH_WORDS * 4];
149 unsigned long crc32;
150 };
151};
152
153struct group_run_stats {
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154 unsigned long long max_run[2], min_run[2];
155 unsigned long long max_bw[2], min_bw[2];
e9b2a3fa 156 unsigned long long io_kb[2];
9104f874 157 unsigned long long agg[2];
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158};
159
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160/*
161 * What type of allocation to use for io buffers
162 */
163enum fio_memtype {
164 MEM_MALLOC = 0, /* ordinary malloc */
165 MEM_SHM, /* use shared memory segments */
74b025b0 166 MEM_SHMHUGE, /* use shared memory segments with huge pages */
e9c047a0 167 MEM_MMAP, /* use anonynomous mmap */
d0bdaf49 168 MEM_MMAPHUGE, /* memory mapped huge file */
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169};
170
171/*
172 * The type of object we are working on
173 */
174enum fio_filetype {
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175 FIO_TYPE_FILE = 1, /* plain file */
176 FIO_TYPE_BD, /* block device */
177 FIO_TYPE_CHAR, /* character device */
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178};
179
2866c82d 180enum fio_ioengine_flags {
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181 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
182 FIO_CPUIO = 1 << 1, /* cpu burner, doesn't do real io */
183 FIO_MMAPIO = 1 << 2, /* uses memory mapped io */
184 FIO_RAWIO = 1 << 3, /* some sort of direct/raw io */
185 FIO_NETIO = 1 << 4, /* networked io */
186 FIO_NULLIO = 1 << 5, /* no real data transfer (cpu/null) */
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187};
188
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189/*
190 * Each thread_data structure has a number of files associated with it,
191 * this structure holds state information for a single file.
192 */
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193struct fio_file {
194 /*
195 * A file may not be a file descriptor, let the io engine decide
196 */
197 union {
198 unsigned long file_data;
e26f8f7a 199 int fd;
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200 };
201 char *file_name;
202 void *mmap;
203 unsigned long long file_size;
204 unsigned long long real_file_size;
205 unsigned long long file_offset;
206 unsigned long long last_pos;
02bcaa8c 207 unsigned long long last_completed_pos;
53cdc686 208
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209 /*
210 * block map for random io
211 */
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212 unsigned long *file_map;
213 unsigned int num_maps;
1c9e06ee 214 unsigned int last_free_lookup;
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215
216 unsigned int unlink;
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217};
218
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219/*
220 * How many depth levels to log
221 */
222#define FIO_IO_U_MAP_NR 8
ec118304 223#define FIO_IO_U_LAT_NR 12
71619dc2 224
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225/*
226 * This describes a single thread/process executing a fio job.
227 */
ebac4655 228struct thread_data {
61697c37 229 char *description;
b4692828 230 char *name;
ef899b63 231 char *directory;
13f8e2d2 232 char *filename;
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233 char verror[80];
234 pthread_t thread;
235 int thread_number;
236 int groupid;
e9c047a0 237 enum fio_filetype filetype;
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238 struct fio_file *files;
239 unsigned int nr_files;
13f8e2d2 240 unsigned int nr_uniq_files;
53cdc686 241 unsigned int next_file;
ebac4655 242 int error;
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243 pid_t pid;
244 char *orig_buffer;
245 size_t orig_buffer_size;
246 volatile int terminate;
247 volatile int runstate;
e9c047a0 248 enum fio_ddir ddir;
3d60d1ed 249 unsigned int iomix;
ebac4655 250 unsigned int ioprio;
87dc1ab1 251 unsigned int last_was_sync;
e9c047a0 252
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253 unsigned int sequential;
254 unsigned int odirect;
255 unsigned int invalidate_cache;
256 unsigned int create_serialize;
257 unsigned int create_fsync;
258 unsigned int end_fsync;
259 unsigned int sync_io;
260 unsigned int verify;
261 unsigned int use_thread;
262 unsigned int unlink;
263 unsigned int do_disk_util;
264 unsigned int override_sync;
265 unsigned int rand_repeatable;
266 unsigned int write_lat_log;
267 unsigned int write_bw_log;
bb8895e0 268 unsigned int norandommap;
690adba3 269 unsigned int bs_unaligned;
e9c047a0 270
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271 unsigned int bs[2];
272 unsigned int min_bs[2];
273 unsigned int max_bs[2];
56bb17f2 274 unsigned int hugepage_size;
a00735e6 275 unsigned int rw_min_bs;
ebac4655 276 unsigned int thinktime;
9c1f7434 277 unsigned int thinktime_blocks;
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278 unsigned int fsync_blocks;
279 unsigned int start_delay;
906c8d75 280 unsigned long timeout;
ebac4655 281 unsigned int overwrite;
ebac4655 282 unsigned int bw_avg_time;
ebac4655 283 unsigned int loops;
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284 unsigned long long zone_size;
285 unsigned long long zone_skip;
e9c047a0 286 enum fio_memtype mem_type;
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287 char *mmapfile;
288 int mmapfd;
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289 unsigned int stonewall;
290 unsigned int numjobs;
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291 unsigned int iodepth;
292 os_cpu_mask_t cpumask;
aea47d44 293 unsigned int iolog;
843a7413 294 unsigned int read_iolog;
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295 unsigned int rwmixcycle;
296 unsigned int rwmixread;
e1f36503 297 unsigned int rwmixwrite;
b6f4d880 298 unsigned int nice;
aea47d44 299
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300 char *read_iolog_file;
301 char *write_iolog_file;
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302 void *iolog_buf;
303 FILE *iolog_f;
ebac4655 304
da86774e 305 char *sysfs_root;
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306 char *ioscheduler;
307
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308 os_random_state_t bsrange_state;
309 os_random_state_t verify_state;
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310
311 int shm_id;
312
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313 /*
314 * IO engine hooks, contains everything needed to submit an io_u
315 * to any of the available IO engines.
316 */
2866c82d 317 struct ioengine_ops *io_ops;
ebac4655 318
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319 /*
320 * Current IO depth and list of free and busy io_u's.
321 */
ebac4655 322 unsigned int cur_depth;
71619dc2 323 unsigned int io_u_map[FIO_IO_U_MAP_NR];
ec118304 324 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
71619dc2 325 unsigned long total_io_u;
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326 struct list_head io_u_freelist;
327 struct list_head io_u_busylist;
328
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329 /*
330 * Rate state
331 */
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332 unsigned int rate;
333 unsigned int ratemin;
334 unsigned int ratecycle;
335 unsigned long rate_usec_cycle;
336 long rate_pending_usleep;
337 unsigned long rate_bytes;
338 struct timeval lastrate;
339
340 unsigned long runtime[2]; /* msec */
341 unsigned long long io_size;
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342 unsigned long long total_file_size;
343 unsigned long long start_offset;
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344 unsigned long long total_io_size;
345
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346 unsigned long long io_blocks[2];
347 unsigned long long io_bytes[2];
348 unsigned long long zone_bytes;
349 unsigned long long this_io_bytes[2];
bbfd6b00 350 volatile int mutex;
ebac4655 351
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352 /*
353 * State for random io, a bitmap of blocks done vs not done
354 */
6dfd46b9 355 os_random_state_t random_state;
ebac4655 356
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357 /*
358 * CPU "io" cycle burner
359 */
360 unsigned int cpuload;
361 unsigned int cpucycle;
362
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363 /*
364 * bandwidth and latency stats
365 */
366 struct io_stat clat_stat[2]; /* completion latency */
367 struct io_stat slat_stat[2]; /* submission latency */
368 struct io_stat bw_stat[2]; /* bandwidth stats */
369
9104f874 370 unsigned long long stat_io_bytes[2];
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371 struct timeval stat_sample_time[2];
372
373 struct io_log *slat_log;
374 struct io_log *clat_log;
375 struct io_log *bw_log;
376
377 struct timeval start; /* start of this loop */
378 struct timeval epoch; /* time job was started */
69008999 379 struct timeval end_time;/* time job ended */
ebac4655 380
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381 /*
382 * fio system usage accounting
383 */
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384 struct rusage ru_start;
385 struct rusage ru_end;
386 unsigned long usr_time;
387 unsigned long sys_time;
388 unsigned long ctx;
389
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390 /*
391 * read/write mixed workload state
392 */
6dfd46b9 393 os_random_state_t rwmix_state;
a6ccc7be 394 struct timeval rwmix_switch;
e9c047a0 395 enum fio_ddir rwmix_ddir;
a6ccc7be 396
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397 /*
398 * Pre-run and post-run shell
399 */
400 char *exec_prerun;
401 char *exec_postrun;
402
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403 /*
404 * IO historic logs
405 */
ebac4655 406 struct list_head io_hist_list;
aea47d44 407 struct list_head io_log_list;
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408};
409
b990b5c0 410#define __td_verror(td, err, msg) \
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411 do { \
412 int e = (err); \
413 (td)->error = e; \
b990b5c0 414 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, error=%s", __FILE__, __LINE__, (msg)); \
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415 } while (0)
416
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417
418#define td_verror(td, err) __td_verror((td), (err), strerror((err)))
419#define td_vmsg(td, err, msg) __td_verror((td), (err), (msg))
420
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421extern int exitall_on_terminate;
422extern int thread_number;
423extern int shm_id;
424extern int groupid;
c6ae0a5b 425extern int terse_output;
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426extern FILE *f_out;
427extern FILE *f_err;
53cdc686 428extern int temp_stall_ts;
1e97cce9 429extern unsigned long long mlock_size;
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430
431extern struct thread_data *threads;
432
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433#define td_read(td) ((td)->ddir == DDIR_READ)
434#define td_write(td) ((td)->ddir == DDIR_WRITE)
3d60d1ed 435#define td_rw(td) ((td)->iomix != 0)
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436
437#define BLOCKS_PER_MAP (8 * sizeof(long))
a00735e6 438#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->rw_min_bs))
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439#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
440#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
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441
442#define MAX_JOBS (1024)
443
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444static inline int should_fsync(struct thread_data *td)
445{
446 if (td->last_was_sync)
447 return 0;
448 if (td->odirect)
449 return 0;
450 if (td_write(td) || td_rw(td) || td->override_sync)
451 return 1;
452
453 return 0;
454}
455
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456/*
457 * Disk utils as read in /sys/block/<dev>/stat
458 */
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459struct disk_util_stat {
460 unsigned ios[2];
461 unsigned merges[2];
462 unsigned long long sectors[2];
463 unsigned ticks[2];
464 unsigned io_ticks;
465 unsigned time_in_queue;
466};
467
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468/*
469 * Per-device disk util management
470 */
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471struct disk_util {
472 struct list_head list;
473
474 char *name;
475 char path[256];
476 dev_t dev;
477
478 struct disk_util_stat dus;
479 struct disk_util_stat last_dus;
480
481 unsigned long msec;
482 struct timeval time;
483};
484
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485/*
486 * Used for passing io_u completion data
487 */
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488struct io_completion_data {
489 int nr; /* input */
490
491 int error; /* output */
492 unsigned long bytes_done[2]; /* output */
02bcaa8c 493 struct timeval time; /* output */
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494};
495
496#define DISK_UTIL_MSEC (250)
497
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498#ifndef min
499#define min(a, b) ((a) < (b) ? (a) : (b))
500#endif
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501#ifndef max
502#define max(a, b) ((a) > (b) ? (a) : (b))
503#endif
6a0106a0 504
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505/*
506 * Log exports
507 */
508extern int read_iolog_get(struct thread_data *, struct io_u *);
509extern void write_iolog_put(struct thread_data *, struct io_u *);
510extern int init_iolog(struct thread_data *td);
511extern void log_io_piece(struct thread_data *, struct io_u *);
512extern void prune_io_piece_log(struct thread_data *);
513extern void write_iolog_close(struct thread_data *);
514
515/*
516 * Logging
517 */
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518extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
519extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
520extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
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521extern void show_run_stats(void);
522extern void init_disk_util(struct thread_data *);
523extern void update_rusage_stat(struct thread_data *);
524extern void update_io_ticks(void);
525extern void disk_util_timer_arm(void);
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526extern void setup_log(struct io_log **);
527extern void finish_log(struct thread_data *, struct io_log *, const char *);
bb3884d8 528extern void __finish_log(struct io_log *, const char *);
8914a9d8 529extern int setup_rate(struct thread_data *);
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530extern struct io_log *agg_io_log[2];
531extern int write_bw_log;
532extern void add_agg_sample(unsigned long, enum fio_ddir);
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533
534/*
535 * Time functions
536 */
537extern unsigned long utime_since(struct timeval *, struct timeval *);
69008999 538extern unsigned long utime_since_now(struct timeval *);
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539extern unsigned long mtime_since(struct timeval *, struct timeval *);
540extern unsigned long mtime_since_now(struct timeval *);
541extern unsigned long time_since_now(struct timeval *);
263e529f 542extern unsigned long mtime_since_genesis(void);
b990b5c0 543extern void __usec_sleep(unsigned int);
6796209a 544extern void usec_sleep(struct thread_data *, unsigned long);
a00735e6 545extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
6043c579 546extern void fill_start_time(struct timeval *);
02bcaa8c 547extern void fio_gettime(struct timeval *, void *);
6796209a 548
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549/*
550 * Init functions
551 */
552extern int parse_options(int, char **);
553extern int init_random_state(struct thread_data *);
554
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555/*
556 * File setup/shutdown
557 */
558extern void close_files(struct thread_data *);
559extern int setup_files(struct thread_data *);
21972cde 560extern int open_files(struct thread_data *);
e5b401d4 561extern int file_invalidate_cache(struct thread_data *, struct fio_file *);
53cdc686 562
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563/*
564 * ETA/status stuff
565 */
566extern void print_thread_status(void);
567extern void print_status_init(int);
568
569/*
570 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
571 * will never back again. It may cycle between running/verififying/fsyncing.
572 * Once the thread reaches TD_EXITED, it is just waiting for the core to
573 * reap it.
574 */
575enum {
576 TD_NOT_CREATED = 0,
577 TD_CREATED,
578 TD_INITIALIZED,
579 TD_RUNNING,
580 TD_VERIFYING,
581 TD_FSYNCING,
582 TD_EXITED,
583 TD_REAPED,
584};
585
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586/*
587 * Verify helpers
588 */
589extern void populate_verify_io_u(struct thread_data *, struct io_u *);
590extern int get_next_verify(struct thread_data *td, struct io_u *);
a9619d44 591extern int do_io_u_verify(struct thread_data *, struct io_u **);
e29d1b70 592
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593/*
594 * Memory helpers
595 */
596extern int fio_pin_memory(void);
597extern void fio_unpin_memory(void);
598extern int allocate_io_mem(struct thread_data *);
599extern void free_io_mem(struct thread_data *);
600
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601/*
602 * io unit handling
603 */
604#define queue_full(td) list_empty(&(td)->io_u_freelist)
605extern struct io_u *__get_io_u(struct thread_data *);
606extern struct io_u *get_io_u(struct thread_data *, struct fio_file *);
607extern void put_io_u(struct thread_data *, struct io_u *);
608extern void ios_completed(struct thread_data *, struct io_completion_data *);
609extern void io_completed(struct thread_data *, struct io_u *, struct io_completion_data *);
610
611/*
612 * io engine entry points
613 */
8c16d840 614extern int td_io_init(struct thread_data *);
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615extern int td_io_prep(struct thread_data *, struct io_u *);
616extern int td_io_queue(struct thread_data *, struct io_u *);
617extern int td_io_sync(struct thread_data *, struct fio_file *);
618extern int td_io_getevents(struct thread_data *, int, int, struct timespec *);
619
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620/*
621 * This is a pretty crappy semaphore implementation, but with the use that fio
622 * has (just signalling start/go conditions), it doesn't have to be better.
623 * Naturally this would not work for any type of contended semaphore or
624 * for real locking.
625 */
1056eaad 626static inline void fio_sem_init(volatile int *sem, int val)
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627{
628 *sem = val;
629}
630
1056eaad 631static inline void fio_sem_down(volatile int *sem)
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632{
633 while (*sem == 0)
634 usleep(10000);
635
636 (*sem)--;
637}
638
1056eaad 639static inline void fio_sem_up(volatile int *sem)
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640{
641 (*sem)++;
642}
643
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644/*
645 * If logging output to a file, stderr should go to both stderr and f_err
646 */
647#define log_err(args...) do { \
648 fprintf(f_err, ##args); \
649 if (f_err != stderr) \
650 fprintf(stderr, ##args); \
651 } while (0)
652
2866c82d 653struct ioengine_ops {
5f350952 654 struct list_head list;
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655 char name[16];
656 int version;
657 int flags;
ea2877a4 658 int (*setup)(struct thread_data *);
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659 int (*init)(struct thread_data *);
660 int (*prep)(struct thread_data *, struct io_u *);
661 int (*queue)(struct thread_data *, struct io_u *);
662 int (*getevents)(struct thread_data *, int, int, struct timespec *);
663 struct io_u *(*event)(struct thread_data *, int);
664 int (*cancel)(struct thread_data *, struct io_u *);
665 void (*cleanup)(struct thread_data *);
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666 void *data;
667 void *dlhandle;
668};
669
87dc1ab1 670#define FIO_IOOPS_VERSION 3
2866c82d 671
b4692828 672extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
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673extern int register_ioengine(struct ioengine_ops *);
674extern void unregister_ioengine(struct ioengine_ops *);
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675extern void close_ioengine(struct thread_data *);
676
677/*
678 * Mark unused variables passed to ops functions as unused, to silence gcc
679 */
680#define fio_unused __attribute((__unused__))
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681#define fio_init __attribute__((constructor))
682#define fio_exit __attribute__((destructor))
2866c82d 683
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684#define for_each_td(td, i) \
685 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
53cdc686 686#define for_each_file(td, f, i) \
34572e28 687 for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
53cdc686 688
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689#define fio_assert(td, cond) do { \
690 if (!(cond)) { \
340fd243 691 int *__foo = NULL; \
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692 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
693 (td)->runstate = TD_EXITED; \
437c9b71 694 (td)->error = EFAULT; \
340fd243 695 *__foo = 0; \
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696 } \
697} while (0)
698
ebac4655 699#endif