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, int all)
85 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
86 td->stat_io_bytes[ddir] = 0;
87 td->this_io_bytes[ddir] = 0;
88 td->stat_io_blocks[ddir] = 0;
89 td->this_io_blocks[ddir] = 0;
90 td->rate_bytes[ddir] = 0;
91 td->rate_blocks[ddir] = 0;
92 td->bytes_done[ddir] = 0;
93 td->rate_io_issue_bytes[ddir] = 0;
94 td->rate_next_io_time[ddir] = 0;
100 td->last_was_sync = 0;
101 td->rwmix_issues = 0;
104 * reset file done count if we are to start over
106 if (td->o.time_based || td->o.loops || td->o.do_verify)
107 td->nr_done_files = 0;
110 void clear_io_state(struct thread_data *td, int all)
115 reset_io_counters(td, all);
118 for_each_file(td, f, i) {
119 fio_file_clear_done(f);
120 f->file_offset = get_start_offset(td, f);
124 * Re-Seed random number generator if rand_repeatable is true
126 if (td->o.rand_repeatable)
127 td_fill_rand_seeds(td);
130 void reset_all_stats(struct thread_data *td)
135 reset_io_counters(td, 1);
137 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
139 td->io_blocks[i] = 0;
140 td->io_issues[i] = 0;
141 td->ts.total_io_u[i] = 0;
142 td->ts.runtime[i] = 0;
143 td->rwmix_issues = 0;
146 fio_gettime(&tv, NULL);
147 memcpy(&td->epoch, &tv, sizeof(tv));
148 memcpy(&td->start, &tv, sizeof(tv));
150 lat_target_reset(td);
153 void reset_fio_state(void)
161 const char *fio_get_os_string(int nr)
164 return fio_os_strings[nr];
169 const char *fio_get_arch_string(int nr)
172 return fio_arch_strings[nr];
177 static const char *td_runstates[] = {
192 static const char *runstate_to_name(int runstate)
194 compiletime_assert(TD_LAST == 12, "td runstate list");
195 if (runstate >= 0 && runstate < TD_LAST)
196 return td_runstates[runstate];
201 void td_set_runstate(struct thread_data *td, int runstate)
203 if (td->runstate == runstate)
206 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
207 runstate_to_name(td->runstate),
208 runstate_to_name(runstate));
209 td->runstate = runstate;
212 int td_bump_runstate(struct thread_data *td, int new_state)
214 int old_state = td->runstate;
216 td_set_runstate(td, new_state);
220 void td_restore_runstate(struct thread_data *td, int old_state)
222 td_set_runstate(td, old_state);
225 void fio_mark_td_terminate(struct thread_data *td)
227 fio_gettime(&td->terminate_time, NULL);
232 void fio_terminate_threads(int group_id)
234 struct thread_data *td;
235 pid_t pid = getpid();
238 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
241 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
242 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
243 td->o.name, (int) td->pid);
248 fio_mark_td_terminate(td);
249 td->o.start_delay = 0;
252 * if the thread is running, just let it exit
254 if (!td->pid || pid == td->pid)
256 else if (td->runstate < TD_RAMP)
257 kill(td->pid, SIGTERM);
259 struct ioengine_ops *ops = td->io_ops;
261 if (ops && ops->terminate)
268 int fio_running_or_pending_io_threads(void)
270 struct thread_data *td;
274 if (td->flags & TD_F_NOIO)
276 if (td->runstate < TD_EXITED)
283 int fio_set_fd_nonblocking(int fd, const char *who)
287 flags = fcntl(fd, F_GETFL);
289 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
291 int new_flags = flags | O_NONBLOCK;
293 new_flags = fcntl(fd, F_SETFL, new_flags);
295 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
301 static int endian_check(void)
312 else if (u.c[0] == 0x12)
315 #if defined(CONFIG_LITTLE_ENDIAN)
318 #elif defined(CONFIG_BIG_ENDIAN)
331 int initialize_fio(char *envp[])
336 * We need these to be properly 64-bit aligned, otherwise we
337 * can run into problems on archs that fault on unaligned fp
340 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
341 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
342 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
343 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
344 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
345 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
346 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
347 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
349 if (endian_check()) {
350 log_err("fio: endianness settings appear wrong.\n");
351 log_err("fio: please report this to fio@vger.kernel.org\n");
355 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
356 #error "No available clock source!"
363 if (fio_filelock_init()) {
364 log_err("fio: failed initializing filelock subsys\n");
369 * We need locale for number printing, if it isn't set then just
370 * go with the US format.
372 if (!getenv("LC_NUMERIC"))
373 setlocale(LC_NUMERIC, "en_US");
375 ps = sysconf(_SC_PAGESIZE);
377 log_err("Failed to get page size\n");
388 void deinitialize_fio(void)