| 1 | /* |
| 2 | * fio - the flexible io tester |
| 3 | * |
| 4 | * Copyright (C) 2005 Jens Axboe <axboe@suse.de> |
| 5 | * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk> |
| 6 | * |
| 7 | * The license below covers all files distributed with fio unless otherwise |
| 8 | * noted in the file itself. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <string.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <signal.h> |
| 28 | #include <stdint.h> |
| 29 | #include <locale.h> |
| 30 | #include <fcntl.h> |
| 31 | |
| 32 | #include "fio.h" |
| 33 | #include "smalloc.h" |
| 34 | #include "os/os.h" |
| 35 | #include "filelock.h" |
| 36 | #include "helper_thread.h" |
| 37 | |
| 38 | /* |
| 39 | * Just expose an empty list, if the OS does not support disk util stats |
| 40 | */ |
| 41 | #ifndef FIO_HAVE_DISK_UTIL |
| 42 | FLIST_HEAD(disk_list); |
| 43 | #endif |
| 44 | |
| 45 | unsigned long arch_flags = 0; |
| 46 | |
| 47 | uintptr_t page_mask = 0; |
| 48 | uintptr_t page_size = 0; |
| 49 | |
| 50 | static const char *fio_os_strings[os_nr] = { |
| 51 | "Invalid", |
| 52 | "Linux", |
| 53 | "AIX", |
| 54 | "FreeBSD", |
| 55 | "HP-UX", |
| 56 | "OSX", |
| 57 | "NetBSD", |
| 58 | "OpenBSD", |
| 59 | "Solaris", |
| 60 | "Windows", |
| 61 | "Android", |
| 62 | "DragonFly", |
| 63 | }; |
| 64 | |
| 65 | static const char *fio_arch_strings[arch_nr] = { |
| 66 | "Invalid", |
| 67 | "x86-64", |
| 68 | "x86", |
| 69 | "ppc", |
| 70 | "ia64", |
| 71 | "s390", |
| 72 | "alpha", |
| 73 | "sparc", |
| 74 | "sparc64", |
| 75 | "arm", |
| 76 | "sh", |
| 77 | "hppa", |
| 78 | "generic" |
| 79 | }; |
| 80 | |
| 81 | static void reset_io_counters(struct thread_data *td, int all) |
| 82 | { |
| 83 | int ddir; |
| 84 | |
| 85 | if (all) { |
| 86 | for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) { |
| 87 | td->stat_io_bytes[ddir] = 0; |
| 88 | td->this_io_bytes[ddir] = 0; |
| 89 | td->stat_io_blocks[ddir] = 0; |
| 90 | td->this_io_blocks[ddir] = 0; |
| 91 | td->rate_bytes[ddir] = 0; |
| 92 | td->rate_blocks[ddir] = 0; |
| 93 | td->bytes_done[ddir] = 0; |
| 94 | td->rate_io_issue_bytes[ddir] = 0; |
| 95 | td->rate_next_io_time[ddir] = 0; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | td->zone_bytes = 0; |
| 100 | |
| 101 | td->last_was_sync = 0; |
| 102 | td->rwmix_issues = 0; |
| 103 | |
| 104 | /* |
| 105 | * reset file done count if we are to start over |
| 106 | */ |
| 107 | if (td->o.time_based || td->o.loops || td->o.do_verify) |
| 108 | td->nr_done_files = 0; |
| 109 | } |
| 110 | |
| 111 | void clear_io_state(struct thread_data *td, int all) |
| 112 | { |
| 113 | struct fio_file *f; |
| 114 | unsigned int i; |
| 115 | |
| 116 | reset_io_counters(td, all); |
| 117 | |
| 118 | close_files(td); |
| 119 | for_each_file(td, f, i) { |
| 120 | fio_file_clear_done(f); |
| 121 | f->file_offset = get_start_offset(td, f); |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * Re-Seed random number generator if rand_repeatable is true |
| 126 | */ |
| 127 | if (td->o.rand_repeatable) |
| 128 | td_fill_rand_seeds(td); |
| 129 | } |
| 130 | |
| 131 | void reset_all_stats(struct thread_data *td) |
| 132 | { |
| 133 | struct timeval tv; |
| 134 | int i; |
| 135 | |
| 136 | reset_io_counters(td, 1); |
| 137 | |
| 138 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { |
| 139 | td->io_bytes[i] = 0; |
| 140 | td->io_blocks[i] = 0; |
| 141 | td->io_issues[i] = 0; |
| 142 | td->ts.total_io_u[i] = 0; |
| 143 | td->ts.runtime[i] = 0; |
| 144 | td->rwmix_issues = 0; |
| 145 | } |
| 146 | |
| 147 | fio_gettime(&tv, NULL); |
| 148 | memcpy(&td->epoch, &tv, sizeof(tv)); |
| 149 | memcpy(&td->start, &tv, sizeof(tv)); |
| 150 | memcpy(&td->iops_sample_time, &tv, sizeof(tv)); |
| 151 | memcpy(&td->bw_sample_time, &tv, sizeof(tv)); |
| 152 | |
| 153 | lat_target_reset(td); |
| 154 | clear_rusage_stat(td); |
| 155 | helper_reset(); |
| 156 | } |
| 157 | |
| 158 | void reset_fio_state(void) |
| 159 | { |
| 160 | groupid = 0; |
| 161 | thread_number = 0; |
| 162 | stat_number = 0; |
| 163 | done_secs = 0; |
| 164 | } |
| 165 | |
| 166 | const char *fio_get_os_string(int nr) |
| 167 | { |
| 168 | if (nr < os_nr) |
| 169 | return fio_os_strings[nr]; |
| 170 | |
| 171 | return NULL; |
| 172 | } |
| 173 | |
| 174 | const char *fio_get_arch_string(int nr) |
| 175 | { |
| 176 | if (nr < arch_nr) |
| 177 | return fio_arch_strings[nr]; |
| 178 | |
| 179 | return NULL; |
| 180 | } |
| 181 | |
| 182 | static const char *td_runstates[] = { |
| 183 | "NOT_CREATED", |
| 184 | "CREATED", |
| 185 | "INITIALIZED", |
| 186 | "RAMP", |
| 187 | "SETTING_UP", |
| 188 | "RUNNING", |
| 189 | "PRE_READING", |
| 190 | "VERIFYING", |
| 191 | "FSYNCING", |
| 192 | "FINISHING", |
| 193 | "EXITED", |
| 194 | "REAPED", |
| 195 | }; |
| 196 | |
| 197 | const char *runstate_to_name(int runstate) |
| 198 | { |
| 199 | compiletime_assert(TD_LAST == 12, "td runstate list"); |
| 200 | if (runstate >= 0 && runstate < TD_LAST) |
| 201 | return td_runstates[runstate]; |
| 202 | |
| 203 | return "invalid"; |
| 204 | } |
| 205 | |
| 206 | void td_set_runstate(struct thread_data *td, int runstate) |
| 207 | { |
| 208 | if (td->runstate == runstate) |
| 209 | return; |
| 210 | |
| 211 | dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid, |
| 212 | runstate_to_name(td->runstate), |
| 213 | runstate_to_name(runstate)); |
| 214 | td->runstate = runstate; |
| 215 | } |
| 216 | |
| 217 | int td_bump_runstate(struct thread_data *td, int new_state) |
| 218 | { |
| 219 | int old_state = td->runstate; |
| 220 | |
| 221 | td_set_runstate(td, new_state); |
| 222 | return old_state; |
| 223 | } |
| 224 | |
| 225 | void td_restore_runstate(struct thread_data *td, int old_state) |
| 226 | { |
| 227 | td_set_runstate(td, old_state); |
| 228 | } |
| 229 | |
| 230 | void fio_mark_td_terminate(struct thread_data *td) |
| 231 | { |
| 232 | fio_gettime(&td->terminate_time, NULL); |
| 233 | write_barrier(); |
| 234 | td->terminate = 1; |
| 235 | } |
| 236 | |
| 237 | void fio_terminate_threads(unsigned int group_id) |
| 238 | { |
| 239 | struct thread_data *td; |
| 240 | pid_t pid = getpid(); |
| 241 | int i; |
| 242 | |
| 243 | dprint(FD_PROCESS, "terminate group_id=%d\n", group_id); |
| 244 | |
| 245 | for_each_td(td, i) { |
| 246 | if (group_id == TERMINATE_ALL || group_id == td->groupid) { |
| 247 | dprint(FD_PROCESS, "setting terminate on %s/%d\n", |
| 248 | td->o.name, (int) td->pid); |
| 249 | |
| 250 | if (td->terminate) |
| 251 | continue; |
| 252 | |
| 253 | fio_mark_td_terminate(td); |
| 254 | td->o.start_delay = 0; |
| 255 | |
| 256 | /* |
| 257 | * if the thread is running, just let it exit |
| 258 | */ |
| 259 | if (!td->pid || pid == td->pid) |
| 260 | continue; |
| 261 | else if (td->runstate < TD_RAMP) |
| 262 | kill(td->pid, SIGTERM); |
| 263 | else { |
| 264 | struct ioengine_ops *ops = td->io_ops; |
| 265 | |
| 266 | if (ops && ops->terminate) |
| 267 | ops->terminate(td); |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | int fio_running_or_pending_io_threads(void) |
| 274 | { |
| 275 | struct thread_data *td; |
| 276 | int i; |
| 277 | |
| 278 | for_each_td(td, i) { |
| 279 | if (td->flags & TD_F_NOIO) |
| 280 | continue; |
| 281 | if (td->runstate < TD_EXITED) |
| 282 | return 1; |
| 283 | } |
| 284 | |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | int fio_set_fd_nonblocking(int fd, const char *who) |
| 289 | { |
| 290 | int flags; |
| 291 | |
| 292 | flags = fcntl(fd, F_GETFL); |
| 293 | if (flags < 0) |
| 294 | log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno)); |
| 295 | else { |
| 296 | int new_flags = flags | O_NONBLOCK; |
| 297 | |
| 298 | new_flags = fcntl(fd, F_SETFL, new_flags); |
| 299 | if (new_flags < 0) |
| 300 | log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno)); |
| 301 | } |
| 302 | |
| 303 | return flags; |
| 304 | } |
| 305 | |
| 306 | static int endian_check(void) |
| 307 | { |
| 308 | union { |
| 309 | uint8_t c[8]; |
| 310 | uint64_t v; |
| 311 | } u; |
| 312 | int le = 0, be = 0; |
| 313 | |
| 314 | u.v = 0x12; |
| 315 | if (u.c[7] == 0x12) |
| 316 | be = 1; |
| 317 | else if (u.c[0] == 0x12) |
| 318 | le = 1; |
| 319 | |
| 320 | #if defined(CONFIG_LITTLE_ENDIAN) |
| 321 | if (be) |
| 322 | return 1; |
| 323 | #elif defined(CONFIG_BIG_ENDIAN) |
| 324 | if (le) |
| 325 | return 1; |
| 326 | #else |
| 327 | return 1; |
| 328 | #endif |
| 329 | |
| 330 | if (!le && !be) |
| 331 | return 1; |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | int initialize_fio(char *envp[]) |
| 337 | { |
| 338 | long ps; |
| 339 | |
| 340 | /* |
| 341 | * We need these to be properly 64-bit aligned, otherwise we |
| 342 | * can run into problems on archs that fault on unaligned fp |
| 343 | * access (ARM). |
| 344 | */ |
| 345 | compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list"); |
| 346 | compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time"); |
| 347 | compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count"); |
| 348 | compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile"); |
| 349 | compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta"); |
| 350 | compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h"); |
| 351 | compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list"); |
| 352 | compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile"); |
| 353 | |
| 354 | if (endian_check()) { |
| 355 | log_err("fio: endianness settings appear wrong.\n"); |
| 356 | log_err("fio: please report this to fio@vger.kernel.org\n"); |
| 357 | return 1; |
| 358 | } |
| 359 | |
| 360 | #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME) |
| 361 | #error "No available clock source!" |
| 362 | #endif |
| 363 | |
| 364 | arch_init(envp); |
| 365 | |
| 366 | sinit(); |
| 367 | |
| 368 | if (fio_filelock_init()) { |
| 369 | log_err("fio: failed initializing filelock subsys\n"); |
| 370 | return 1; |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * We need locale for number printing, if it isn't set then just |
| 375 | * go with the US format. |
| 376 | */ |
| 377 | if (!getenv("LC_NUMERIC")) |
| 378 | setlocale(LC_NUMERIC, "en_US"); |
| 379 | |
| 380 | ps = sysconf(_SC_PAGESIZE); |
| 381 | if (ps < 0) { |
| 382 | log_err("Failed to get page size\n"); |
| 383 | return 1; |
| 384 | } |
| 385 | |
| 386 | page_size = ps; |
| 387 | page_mask = ps - 1; |
| 388 | |
| 389 | fio_keywords_init(); |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | void deinitialize_fio(void) |
| 394 | { |
| 395 | fio_keywords_exit(); |
| 396 | } |