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 #include "helper_thread.h"
40 * Just expose an empty list, if the OS does not support disk util stats
42 #ifndef FIO_HAVE_DISK_UTIL
43 FLIST_HEAD(disk_list);
46 unsigned long arch_flags = 0;
48 uintptr_t page_mask = 0;
49 uintptr_t page_size = 0;
52 static const char *fio_os_strings[os_nr] = {
68 static const char *fio_arch_strings[arch_nr] = {
86 static void reset_io_counters(struct thread_data *td, int all)
91 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
92 td->stat_io_bytes[ddir] = 0;
93 td->this_io_bytes[ddir] = 0;
94 td->stat_io_blocks[ddir] = 0;
95 td->this_io_blocks[ddir] = 0;
96 td->rate_bytes[ddir] = 0;
97 td->rate_blocks[ddir] = 0;
98 td->bytes_done[ddir] = 0;
99 td->rate_io_issue_bytes[ddir] = 0;
100 td->rate_next_io_time[ddir] = 0;
106 td->last_was_sync = 0;
107 td->rwmix_issues = 0;
110 * reset file done count if we are to start over
112 if (td->o.time_based || td->o.loops || td->o.do_verify)
113 td->nr_done_files = 0;
116 void clear_io_state(struct thread_data *td, int all)
121 reset_io_counters(td, all);
124 for_each_file(td, f, i) {
125 fio_file_clear_done(f);
126 f->file_offset = get_start_offset(td, f);
130 * Re-Seed random number generator if rand_repeatable is true
132 if (td->o.rand_repeatable)
133 td_fill_rand_seeds(td);
136 void reset_all_stats(struct thread_data *td)
140 reset_io_counters(td, 1);
142 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
144 td->io_blocks[i] = 0;
145 td->io_issues[i] = 0;
146 td->ts.total_io_u[i] = 0;
147 td->ts.runtime[i] = 0;
148 td->rwmix_issues = 0;
151 set_epoch_time(td, td->o.log_unix_epoch);
152 memcpy(&td->start, &td->epoch, sizeof(struct timeval));
153 memcpy(&td->iops_sample_time, &td->epoch, sizeof(struct timeval));
154 memcpy(&td->bw_sample_time, &td->epoch, sizeof(struct timeval));
155 memcpy(&td->ss.prev_time, &td->epoch, sizeof(struct timeval));
157 lat_target_reset(td);
158 clear_rusage_stat(td);
162 void reset_fio_state(void)
170 const char *fio_get_os_string(int nr)
173 return fio_os_strings[nr];
178 const char *fio_get_arch_string(int nr)
181 return fio_arch_strings[nr];
186 static const char *td_runstates[] = {
201 const char *runstate_to_name(int runstate)
203 compiletime_assert(TD_LAST == 12, "td runstate list");
204 if (runstate >= 0 && runstate < TD_LAST)
205 return td_runstates[runstate];
210 void td_set_runstate(struct thread_data *td, int runstate)
212 if (td->runstate == runstate)
215 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
216 runstate_to_name(td->runstate),
217 runstate_to_name(runstate));
218 td->runstate = runstate;
221 int td_bump_runstate(struct thread_data *td, int new_state)
223 int old_state = td->runstate;
225 td_set_runstate(td, new_state);
229 void td_restore_runstate(struct thread_data *td, int old_state)
231 td_set_runstate(td, old_state);
234 void fio_mark_td_terminate(struct thread_data *td)
236 fio_gettime(&td->terminate_time, NULL);
241 void fio_terminate_threads(unsigned int group_id)
243 struct thread_data *td;
244 pid_t pid = getpid();
247 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
250 if (group_id == TERMINATE_ALL || group_id == td->groupid) {
251 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
252 td->o.name, (int) td->pid);
257 fio_mark_td_terminate(td);
258 td->o.start_delay = 0;
261 * if the thread is running, just let it exit
263 if (!td->pid || pid == td->pid)
265 else if (td->runstate < TD_RAMP)
266 kill(td->pid, SIGTERM);
268 struct ioengine_ops *ops = td->io_ops;
270 if (ops && ops->terminate)
277 int fio_running_or_pending_io_threads(void)
279 struct thread_data *td;
281 int nr_io_threads = 0;
284 if (td->flags & TD_F_NOIO)
287 if (td->runstate < TD_EXITED)
292 return -1; /* we only had cpuio threads to begin with */
296 int fio_set_fd_nonblocking(int fd, const char *who)
300 flags = fcntl(fd, F_GETFL);
302 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
304 int new_flags = flags | O_NONBLOCK;
306 new_flags = fcntl(fd, F_SETFL, new_flags);
308 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
314 static int endian_check(void)
325 else if (u.c[0] == 0x12)
328 #if defined(CONFIG_LITTLE_ENDIAN)
331 #elif defined(CONFIG_BIG_ENDIAN)
344 int initialize_fio(char *envp[])
349 * We need these to be properly 64-bit aligned, otherwise we
350 * can run into problems on archs that fault on unaligned fp
353 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
354 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
355 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
356 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
357 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
358 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
359 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
360 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
362 if (endian_check()) {
363 log_err("fio: endianness settings appear wrong.\n");
364 log_err("fio: please report this to fio@vger.kernel.org\n");
368 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
369 #error "No available clock source!"
376 if (fio_filelock_init()) {
377 log_err("fio: failed initializing filelock subsys\n");
384 * We need locale for number printing, if it isn't set then just
385 * go with the US format.
387 if (!getenv("LC_NUMERIC"))
388 setlocale(LC_NUMERIC, "en_US");
390 ps = sysconf(_SC_PAGESIZE);
392 log_err("Failed to get page size\n");
403 void deinitialize_fio(void)