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