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 uintptr_t page_mask = 0;
45 uintptr_t page_size = 0;
47 static const char *fio_os_strings[os_nr] = {
61 static const char *fio_arch_strings[arch_nr] = {
77 static void reset_io_counters(struct thread_data *td)
81 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
82 td->stat_io_bytes[ddir] = 0;
83 td->this_io_bytes[ddir] = 0;
84 td->stat_io_blocks[ddir] = 0;
85 td->this_io_blocks[ddir] = 0;
86 td->rate_bytes[ddir] = 0;
87 td->rate_blocks[ddir] = 0;
91 td->last_was_sync = 0;
95 * reset file done count if we are to start over
97 if (td->o.time_based || td->o.loops || td->o.do_verify)
98 td->nr_done_files = 0;
101 void clear_io_state(struct thread_data *td)
106 reset_io_counters(td);
109 for_each_file(td, f, i)
110 fio_file_clear_done(f);
113 * Set the same seed to get repeatable runs
115 td_fill_rand_seeds(td);
118 void reset_all_stats(struct thread_data *td)
123 reset_io_counters(td);
125 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
127 td->io_blocks[i] = 0;
128 td->io_issues[i] = 0;
129 td->ts.total_io_u[i] = 0;
130 td->ts.runtime[i] = 0;
131 td->rwmix_issues = 0;
134 fio_gettime(&tv, NULL);
135 memcpy(&td->epoch, &tv, sizeof(tv));
136 memcpy(&td->start, &tv, sizeof(tv));
138 lat_target_reset(td);
141 void reset_fio_state(void)
149 const char *fio_get_os_string(int nr)
152 return fio_os_strings[nr];
157 const char *fio_get_arch_string(int nr)
160 return fio_arch_strings[nr];
165 void td_set_runstate(struct thread_data *td, int runstate)
167 if (td->runstate == runstate)
170 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
171 td->runstate, runstate);
172 td->runstate = runstate;
175 void fio_terminate_threads(int group_id)
177 struct thread_data *td;
178 pid_t pid = getpid();
181 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
184 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
185 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
186 td->o.name, (int) td->pid);
188 td->o.start_delay = 0;
191 * if the thread is running, just let it exit
193 if (!td->pid || pid == td->pid)
195 else if (td->runstate < TD_RAMP)
196 kill(td->pid, SIGTERM);
198 struct ioengine_ops *ops = td->io_ops;
200 if (ops && ops->terminate)
207 static int endian_check(void)
218 else if (u.c[0] == 0x12)
221 #if defined(CONFIG_LITTLE_ENDIAN)
224 #elif defined(CONFIG_BIG_ENDIAN)
237 int initialize_fio(char *envp[])
241 if (endian_check()) {
242 log_err("fio: endianness settings appear wrong.\n");
243 log_err("fio: please report this to fio@vger.kernel.org\n");
247 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
248 #error "No available clock source!"
256 * We need locale for number printing, if it isn't set then just
257 * go with the US format.
259 if (!getenv("LC_NUMERIC"))
260 setlocale(LC_NUMERIC, "en_US");
262 ps = sysconf(_SC_PAGESIZE);
264 log_err("Failed to get page size\n");