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] = {
63 static const char *fio_arch_strings[arch_nr] = {
79 static void reset_io_counters(struct thread_data *td)
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;
93 td->last_was_sync = 0;
97 * reset file done count if we are to start over
99 if (td->o.time_based || td->o.loops || td->o.do_verify)
100 td->nr_done_files = 0;
103 void clear_io_state(struct thread_data *td)
108 reset_io_counters(td);
111 for_each_file(td, f, i)
112 fio_file_clear_done(f);
115 * Set the same seed to get repeatable runs
117 td_fill_rand_seeds(td);
120 void reset_all_stats(struct thread_data *td)
125 reset_io_counters(td);
127 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
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;
136 fio_gettime(&tv, NULL);
137 memcpy(&td->epoch, &tv, sizeof(tv));
138 memcpy(&td->start, &tv, sizeof(tv));
140 lat_target_reset(td);
143 void reset_fio_state(void)
151 const char *fio_get_os_string(int nr)
154 return fio_os_strings[nr];
159 const char *fio_get_arch_string(int nr)
162 return fio_arch_strings[nr];
167 void td_set_runstate(struct thread_data *td, int runstate)
169 if (td->runstate == runstate)
172 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
173 td->runstate, runstate);
174 td->runstate = runstate;
177 int td_bump_runstate(struct thread_data *td, int new_state)
179 int old_state = td->runstate;
181 td_set_runstate(td, new_state);
185 void td_restore_runstate(struct thread_data *td, int old_state)
187 td_set_runstate(td, old_state);
190 void fio_terminate_threads(int group_id)
192 struct thread_data *td;
193 pid_t pid = getpid();
196 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
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);
203 td->o.start_delay = 0;
206 * if the thread is running, just let it exit
208 if (!td->pid || pid == td->pid)
210 else if (td->runstate < TD_RAMP)
211 kill(td->pid, SIGTERM);
213 struct ioengine_ops *ops = td->io_ops;
215 if (ops && ops->terminate)
222 int fio_running_or_pending_io_threads(void)
224 struct thread_data *td;
228 if (td->flags & TD_F_NOIO)
230 if (td->runstate < TD_EXITED)
237 void fio_set_fd_nonblocking(int fd, const char *who)
241 flags = fcntl(fd, F_GETFL);
243 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
246 flags = fcntl(fd, F_SETFL, flags);
248 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
252 static int endian_check(void)
263 else if (u.c[0] == 0x12)
266 #if defined(CONFIG_LITTLE_ENDIAN)
269 #elif defined(CONFIG_BIG_ENDIAN)
282 int initialize_fio(char *envp[])
286 if (endian_check()) {
287 log_err("fio: endianness settings appear wrong.\n");
288 log_err("fio: please report this to fio@vger.kernel.org\n");
292 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
293 #error "No available clock source!"
300 if (fio_filelock_init()) {
301 log_err("fio: failed initializing filelock subsys\n");
306 * We need locale for number printing, if it isn't set then just
307 * go with the US format.
309 if (!getenv("LC_NUMERIC"))
310 setlocale(LC_NUMERIC, "en_US");
312 ps = sysconf(_SC_PAGESIZE);
314 log_err("Failed to get page size\n");