1 /* 2 * fio - the flexible io tester 3 * 4 * Copyright (C) 2005 Jens Axboe <axboe (at) suse.de> 5 * Copyright (C) 2006-2012 Jens Axboe <axboe (at) 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 37 /* 38 * Just expose an empty list, if the OS does not support disk util stats 39 */ 40 #ifndef FIO_HAVE_DISK_UTIL 41 FLIST_HEAD(disk_list); 42 #endif 43 44 unsigned long arch_flags = 0; 45 46 uintptr_t page_mask = 0; 47 uintptr_t page_size = 0; 48 49 static const char *fio_os_strings[os_nr] = { 50 "Invalid", 51 "Linux", 52 "AIX", 53 "FreeBSD", 54 "HP-UX", 55 "OSX", 56 "NetBSD", 57 "OpenBSD", 58 "Solaris", 59 "Windows", 60 "Android", 61 }; 62 63 static const char *fio_arch_strings[arch_nr] = { 64 "Invalid", 65 "x86-64", 66 "x86", 67 "ppc", 68 "ia64", 69 "s390", 70 "alpha", 71 "sparc", 72 "sparc64", 73 "arm", 74 "sh", 75 "hppa", 76 "generic" 77 }; 78 79 static void reset_io_counters(struct thread_data *td) 80 { 81 int ddir; 82 83 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) { 84 td->stat_io_bytes[ddir] = 0; 85 td->this_io_bytes[ddir] = 0; 86 td->stat_io_blocks[ddir] = 0; 87 td->this_io_blocks[ddir] = 0; 88 td->rate_bytes[ddir] = 0; 89 td->rate_blocks[ddir] = 0; 90 } 91 td->zone_bytes = 0; 92 93 td->last_was_sync = 0; 94 td->rwmix_issues = 0; 95 96 /* 97 * reset file done count if we are to start over 98 */ 99 if (td->o.time_based || td->o.loops || td->o.do_verify) 100 td->nr_done_files = 0; 101 } 102 103 void clear_io_state(struct thread_data *td) 104 { 105 struct fio_file *f; 106 unsigned int i; 107 108 reset_io_counters(td); 109 110 close_files(td); 111 for_each_file(td, f, i) 112 fio_file_clear_done(f); 113 114 /* 115 * Set the same seed to get repeatable runs 116 */ 117 td_fill_rand_seeds(td); 118 } 119 120 void reset_all_stats(struct thread_data *td) 121 { 122 struct timeval tv; 123 int i; 124 125 reset_io_counters(td); 126 127 for (i = 0; i < DDIR_RWDIR_CNT; i++) { 128 td->io_bytes[i] = 0; 129 td->io_blocks[i] = 0; 130 td->io_issues[i] = 0; 131 td->ts.total_io_u[i] = 0; 132 td->ts.runtime[i] = 0; 133 td->rwmix_issues = 0; 134 } 135 136 fio_gettime(&tv, NULL); 137 memcpy(&td->epoch, &tv, sizeof(tv)); 138 memcpy(&td->start, &tv, sizeof(tv)); 139 140 lat_target_reset(td); 141 } 142 143 void reset_fio_state(void) 144 { 145 groupid = 0; 146 thread_number = 0; 147 stat_number = 0; 148 done_secs = 0; 149 } 150 151 const char *fio_get_os_string(int nr) 152 { 153 if (nr < os_nr) 154 return fio_os_strings[nr]; 155 156 return NULL; 157 } 158 159 const char *fio_get_arch_string(int nr) 160 { 161 if (nr < arch_nr) 162 return fio_arch_strings[nr]; 163 164 return NULL; 165 } 166 167 void td_set_runstate(struct thread_data *td, int runstate) 168 { 169 if (td->runstate == runstate) 170 return; 171 172 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid, 173 td->runstate, runstate); 174 td->runstate = runstate; 175 } 176 177 int td_bump_runstate(struct thread_data *td, int new_state) 178 { 179 int old_state = td->runstate; 180 181 td_set_runstate(td, new_state); 182 return old_state; 183 } 184 185 void td_restore_runstate(struct thread_data *td, int old_state) 186 { 187 td_set_runstate(td, old_state); 188 } 189 190 void fio_terminate_threads(int group_id) 191 { 192 struct thread_data *td; 193 pid_t pid = getpid(); 194 int i; 195 196 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id); 197 198 for_each_td(td, i) { 199 if (group_id == TERMINATE_ALL || groupid == td->groupid) { 200 dprint(FD_PROCESS, "setting terminate on %s/%d\n", 201 td->o.name, (int) td->pid); 202 td->terminate = 1; 203 td->o.start_delay = 0; 204 205 /* 206 * if the thread is running, just let it exit 207 */ 208 if (!td->pid || pid == td->pid) 209 continue; 210 else if (td->runstate < TD_RAMP) 211 kill(td->pid, SIGTERM); 212 else { 213 struct ioengine_ops *ops = td->io_ops; 214 215 if (ops && ops->terminate) 216 ops->terminate(td); 217 } 218 } 219 } 220 } 221 222 int fio_running_or_pending_io_threads(void) 223 { 224 struct thread_data *td; 225 int i; 226 227 for_each_td(td, i) { 228 if (td->flags & TD_F_NOIO) 229 continue; 230 if (td->runstate < TD_EXITED) 231 return 1; 232 } 233 234 return 0; 235 } 236 237 int fio_set_fd_nonblocking(int fd, const char *who) 238 { 239 int flags; 240 241 flags = fcntl(fd, F_GETFL); 242 if (flags < 0) 243 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno)); 244 else { 245 int new_flags = flags | O_NONBLOCK; 246 247 new_flags = fcntl(fd, F_SETFL, new_flags); 248 if (new_flags < 0) 249 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno)); 250 } 251 252 return flags; 253 } 254 255 static int endian_check(void) 256 { 257 union { 258 uint8_t c[8]; 259 uint64_t v; 260 } u; 261 int le = 0, be = 0; 262 263 u.v = 0x12; 264 if (u.c[7] == 0x12) 265 be = 1; 266 else if (u.c[0] == 0x12) 267 le = 1; 268 269 #if defined(CONFIG_LITTLE_ENDIAN) 270 if (be) 271 return 1; 272 #elif defined(CONFIG_BIG_ENDIAN) 273 if (le) 274 return 1; 275 #else 276 return 1; 277 #endif 278 279 if (!le && !be) 280 return 1; 281 282 return 0; 283 } 284 285 int initialize_fio(char *envp[]) 286 { 287 long ps; 288 289 if (endian_check()) { 290 log_err("fio: endianness settings appear wrong.\n"); 291 log_err("fio: please report this to fio (at) vger.kernel.org\n"); 292 return 1; 293 } 294 295 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME) 296 #error "No available clock source!" 297 #endif 298 299 arch_init(envp); 300 301 sinit(); 302 303 if (fio_filelock_init()) { 304 log_err("fio: failed initializing filelock subsys\n"); 305 return 1; 306 } 307 308 /* 309 * We need locale for number printing, if it isn't set then just 310 * go with the US format. 311 */ 312 if (!getenv("LC_NUMERIC")) 313 setlocale(LC_NUMERIC, "en_US"); 314 315 ps = sysconf(_SC_PAGESIZE); 316 if (ps < 0) { 317 log_err("Failed to get page size\n"); 318 return 1; 319 } 320 321 page_size = ps; 322 page_mask = ps - 1; 323 324 fio_keywords_init(); 325 return 0; 326 } 327
