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>
36 * Just expose an empty list, if the OS does not support disk util stats
38 #ifndef FIO_HAVE_DISK_UTIL
39 FLIST_HEAD(disk_list);
42 unsigned long arch_flags = 0;
44 unsigned long page_mask;
45 unsigned long page_size;
47 static const char *fio_os_strings[os_nr] = {
59 static const char *fio_arch_strings[arch_nr] = {
75 static void reset_io_counters(struct thread_data *td)
77 td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
78 td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
79 td->stat_io_blocks[0] = td->stat_io_blocks[1] = 0;
80 td->this_io_blocks[0] = td->this_io_blocks[1] = 0;
82 td->rate_bytes[0] = td->rate_bytes[1] = 0;
83 td->rate_blocks[0] = td->rate_blocks[1] = 0;
85 td->last_was_sync = 0;
88 * reset file done count if we are to start over
90 if (td->o.time_based || td->o.loops)
91 td->nr_done_files = 0;
94 void clear_io_state(struct thread_data *td)
99 reset_io_counters(td);
102 for_each_file(td, f, i)
103 fio_file_clear_done(f);
106 * Set the same seed to get repeatable runs
108 td_fill_rand_seeds(td);
111 void reset_all_stats(struct thread_data *td)
116 reset_io_counters(td);
118 for (i = 0; i < 2; i++) {
120 td->io_blocks[i] = 0;
121 td->io_issues[i] = 0;
122 td->ts.total_io_u[i] = 0;
125 fio_gettime(&tv, NULL);
126 td->ts.runtime[0] = 0;
127 td->ts.runtime[1] = 0;
128 memcpy(&td->epoch, &tv, sizeof(tv));
129 memcpy(&td->start, &tv, sizeof(tv));
132 void reset_fio_state(void)
141 const char *fio_get_os_string(int nr)
144 return fio_os_strings[nr];
149 const char *fio_get_arch_string(int nr)
152 return fio_arch_strings[nr];
157 void td_set_runstate(struct thread_data *td, int runstate)
159 if (td->runstate == runstate)
162 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
163 td->runstate, runstate);
164 td->runstate = runstate;
167 void fio_terminate_threads(int group_id)
169 struct thread_data *td;
172 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
175 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
176 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
177 td->o.name, (int) td->pid);
179 td->o.start_delay = 0;
182 * if the thread is running, just let it exit
186 else if (td->runstate < TD_RAMP)
187 kill(td->pid, SIGTERM);
189 struct ioengine_ops *ops = td->io_ops;
191 if (ops && (ops->flags & FIO_SIGTERM))
192 kill(td->pid, SIGTERM);
198 static int endian_check(void)
209 else if (u.c[0] == 0x12)
212 #if defined(FIO_LITTLE_ENDIAN)
215 #elif defined(FIO_BIG_ENDIAN)
228 int initialize_fio(char *envp[])
232 if (endian_check()) {
233 log_err("fio: endianness settings appear wrong.\n");
234 log_err("fio: please report this to fio@vger.kernel.org\n");
243 * We need locale for number printing, if it isn't set then just
244 * go with the US format.
246 if (!getenv("LC_NUMERIC"))
247 setlocale(LC_NUMERIC, "en_US");
249 ps = sysconf(_SC_PAGESIZE);
251 log_err("Failed to get page size\n");