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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
35 #include "helper_thread.h"
38 FLIST_HEAD(disk_list);
40 unsigned long arch_flags = 0;
42 uintptr_t page_mask = 0;
43 uintptr_t page_size = 0;
46 static const char *fio_os_strings[os_nr] = {
62 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;
95 td->last_usec[ddir] = 0;
101 td->last_was_sync = false;
102 td->rwmix_issues = 0;
105 * reset file done count if we are to start over
107 if (td->o.time_based || td->o.loops || td->o.do_verify)
108 td->nr_done_files = 0;
111 void clear_io_state(struct thread_data *td, int all)
116 reset_io_counters(td, all);
119 for_each_file(td, f, i) {
120 fio_file_clear_done(f);
121 f->file_offset = get_start_offset(td, f);
125 * Re-Seed random number generator if rand_repeatable is true
127 if (td->o.rand_repeatable)
128 td_fill_rand_seeds(td);
131 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 set_epoch_time(td, td->o.log_unix_epoch);
147 memcpy(&td->start, &td->epoch, sizeof(td->epoch));
148 memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
149 memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
150 memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));
152 lat_target_reset(td);
153 clear_rusage_stat(td);
157 void reset_fio_state(void)
165 const char *fio_get_os_string(int nr)
168 return fio_os_strings[nr];
173 const char *fio_get_arch_string(int nr)
176 return fio_arch_strings[nr];
181 static const char *td_runstates[] = {
196 const char *runstate_to_name(int runstate)
198 compiletime_assert(TD_LAST == 12, "td runstate list");
199 if (runstate >= 0 && runstate < TD_LAST)
200 return td_runstates[runstate];
205 void td_set_runstate(struct thread_data *td, int runstate)
207 if (td->runstate == runstate)
210 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
211 runstate_to_name(td->runstate),
212 runstate_to_name(runstate));
213 td->runstate = runstate;
216 int td_bump_runstate(struct thread_data *td, int new_state)
218 int old_state = td->runstate;
220 td_set_runstate(td, new_state);
224 void td_restore_runstate(struct thread_data *td, int old_state)
226 td_set_runstate(td, old_state);
229 void fio_mark_td_terminate(struct thread_data *td)
231 fio_gettime(&td->terminate_time, NULL);
233 td->terminate = true;
236 void fio_terminate_threads(unsigned int group_id)
238 struct thread_data *td;
239 pid_t pid = getpid();
242 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
245 if (group_id == TERMINATE_ALL || group_id == td->groupid) {
246 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
247 td->o.name, (int) td->pid);
252 fio_mark_td_terminate(td);
253 td->o.start_delay = 0;
256 * if the thread is running, just let it exit
258 if (!td->pid || pid == td->pid)
260 else if (td->runstate < TD_RAMP)
261 kill(td->pid, SIGTERM);
263 struct ioengine_ops *ops = td->io_ops;
265 if (ops && ops->terminate)
272 int fio_running_or_pending_io_threads(void)
274 struct thread_data *td;
276 int nr_io_threads = 0;
279 if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
282 if (td->runstate < TD_EXITED)
287 return -1; /* we only had cpuio threads to begin with */
291 int fio_set_fd_nonblocking(int fd, const char *who)
295 flags = fcntl(fd, F_GETFL);
297 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
299 int new_flags = flags | O_NONBLOCK;
301 new_flags = fcntl(fd, F_SETFL, new_flags);
303 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
310 ENDIAN_INVALID_BE = 1,
312 ENDIAN_INVALID_CONFIG,
316 static int endian_check(void)
327 else if (u.c[0] == 0x12)
330 #if defined(CONFIG_LITTLE_ENDIAN)
332 return ENDIAN_INVALID_BE;
333 #elif defined(CONFIG_BIG_ENDIAN)
335 return ENDIAN_INVALID_LE;
337 return ENDIAN_INVALID_CONFIG;
341 return ENDIAN_BROKEN;
346 int initialize_fio(char *envp[])
352 * We need these to be properly 64-bit aligned, otherwise we
353 * can run into problems on archs that fault on unaligned fp
356 compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
357 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
358 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
359 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
360 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
361 compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
362 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
363 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
364 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
365 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
366 compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
368 compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
369 compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
371 err = endian_check();
373 log_err("fio: endianness settings appear wrong.\n");
375 case ENDIAN_INVALID_BE:
376 log_err("fio: got big-endian when configured for little\n");
378 case ENDIAN_INVALID_LE:
379 log_err("fio: got little-endian when configured for big\n");
381 case ENDIAN_INVALID_CONFIG:
382 log_err("fio: not configured to any endianness\n");
385 log_err("fio: failed to detect endianness\n");
391 log_err("fio: please report this to fio@vger.kernel.org\n");
395 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
396 #error "No available clock source!"
403 if (fio_filelock_init()) {
404 log_err("fio: failed initializing filelock subsys\n");
411 * We need locale for number printing, if it isn't set then just
412 * go with the US format.
414 if (!getenv("LC_NUMERIC"))
415 setlocale(LC_NUMERIC, "en_US");
417 ps = sysconf(_SC_PAGESIZE);
419 log_err("Failed to get page size\n");
430 void deinitialize_fio(void)