2 * fio - the flexible io tester
4 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
5 * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
7 * The license below covers all files distributed with fio unless otherwise
8 * noted in the file itself.
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.
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.
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
26 #include <sys/types.h>
38 * Just expose an empty list, if the OS does not support disk util stats
40 #ifndef FIO_HAVE_DISK_UTIL
41 FLIST_HEAD(disk_list);
44 unsigned long arch_flags = 0;
46 uintptr_t page_mask = 0;
47 uintptr_t page_size = 0;
49 static const char *fio_os_strings[os_nr] = {
64 static const char *fio_arch_strings[arch_nr] = {
80 static void reset_io_counters(struct thread_data *td)
84 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
85 td->stat_io_bytes[ddir] = 0;
86 td->this_io_bytes[ddir] = 0;
87 td->stat_io_blocks[ddir] = 0;
88 td->this_io_blocks[ddir] = 0;
89 td->rate_bytes[ddir] = 0;
90 td->rate_blocks[ddir] = 0;
91 td->bytes_done[ddir] = 0;
92 td->rate_io_issue_bytes[ddir] = 0;
93 td->rate_next_io_time[ddir] = 0;
97 td->last_was_sync = 0;
101 * reset file done count if we are to start over
103 if (td->o.time_based || td->o.loops || td->o.do_verify)
104 td->nr_done_files = 0;
107 void clear_io_state(struct thread_data *td)
112 reset_io_counters(td);
115 for_each_file(td, f, i) {
116 fio_file_clear_done(f);
117 f->file_offset = get_start_offset(td, f);
121 * Re-Seed random number generator if rand_repeatable is true
123 if (td->o.rand_repeatable)
124 td_fill_rand_seeds(td);
127 void reset_all_stats(struct thread_data *td)
132 reset_io_counters(td);
134 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
136 td->io_blocks[i] = 0;
137 td->io_issues[i] = 0;
138 td->ts.total_io_u[i] = 0;
139 td->ts.runtime[i] = 0;
140 td->rwmix_issues = 0;
143 fio_gettime(&tv, NULL);
144 memcpy(&td->epoch, &tv, sizeof(tv));
145 memcpy(&td->start, &tv, sizeof(tv));
147 lat_target_reset(td);
150 void reset_fio_state(void)
158 const char *fio_get_os_string(int nr)
161 return fio_os_strings[nr];
166 const char *fio_get_arch_string(int nr)
169 return fio_arch_strings[nr];
174 static const char *td_runstates[] = {
189 static const char *runstate_to_name(int runstate)
191 compiletime_assert(TD_LAST == 12, "td runstate list");
192 if (runstate >= 0 && runstate < TD_LAST)
193 return td_runstates[runstate];
198 void td_set_runstate(struct thread_data *td, int runstate)
200 if (td->runstate == runstate)
203 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
204 runstate_to_name(td->runstate),
205 runstate_to_name(runstate));
206 td->runstate = runstate;
209 int td_bump_runstate(struct thread_data *td, int new_state)
211 int old_state = td->runstate;
213 td_set_runstate(td, new_state);
217 void td_restore_runstate(struct thread_data *td, int old_state)
219 td_set_runstate(td, old_state);
222 void fio_mark_td_terminate(struct thread_data *td)
224 fio_gettime(&td->terminate_time, NULL);
229 void fio_terminate_threads(int group_id)
231 struct thread_data *td;
232 pid_t pid = getpid();
235 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
238 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
239 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
240 td->o.name, (int) td->pid);
245 fio_mark_td_terminate(td);
246 td->o.start_delay = 0;
249 * if the thread is running, just let it exit
251 if (!td->pid || pid == td->pid)
253 else if (td->runstate < TD_RAMP)
254 kill(td->pid, SIGTERM);
256 struct ioengine_ops *ops = td->io_ops;
258 if (ops && ops->terminate)
265 int fio_running_or_pending_io_threads(void)
267 struct thread_data *td;
271 if (td->flags & TD_F_NOIO)
273 if (td->runstate < TD_EXITED)
280 int fio_set_fd_nonblocking(int fd, const char *who)
284 flags = fcntl(fd, F_GETFL);
286 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
288 int new_flags = flags | O_NONBLOCK;
290 new_flags = fcntl(fd, F_SETFL, new_flags);
292 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
298 static int endian_check(void)
309 else if (u.c[0] == 0x12)
312 #if defined(CONFIG_LITTLE_ENDIAN)
315 #elif defined(CONFIG_BIG_ENDIAN)
328 int initialize_fio(char *envp[])
333 * We need these to be properly 64-bit aligned, otherwise we
334 * can run into problems on archs that fault on unaligned fp
337 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
338 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
339 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
340 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
341 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
342 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
343 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
344 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
346 if (endian_check()) {
347 log_err("fio: endianness settings appear wrong.\n");
348 log_err("fio: please report this to fio@vger.kernel.org\n");
352 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
353 #error "No available clock source!"
360 if (fio_filelock_init()) {
361 log_err("fio: failed initializing filelock subsys\n");
366 * We need locale for number printing, if it isn't set then just
367 * go with the US format.
369 if (!getenv("LC_NUMERIC"))
370 setlocale(LC_NUMERIC, "en_US");
372 ps = sysconf(_SC_PAGESIZE);
374 log_err("Failed to get page size\n");
385 void deinitialize_fio(void)