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->loops > 1 || 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)
164 for (i = 0; i < nr_segments; i++)
165 segments[i].nr_threads = 0;
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);
238 td->terminate = true;
241 void fio_terminate_threads(unsigned int group_id, unsigned int terminate)
243 struct thread_data *td;
244 pid_t pid = getpid();
247 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
250 if ((terminate == TERMINATE_GROUP && group_id == TERMINATE_ALL) ||
251 (terminate == TERMINATE_GROUP && group_id == td->groupid) ||
252 (terminate == TERMINATE_STONEWALL && td->runstate >= TD_RUNNING) ||
253 (terminate == TERMINATE_ALL)) {
254 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
255 td->o.name, (int) td->pid);
260 fio_mark_td_terminate(td);
261 td->o.start_delay = 0;
264 * if the thread is running, just let it exit
266 if (!td->pid || pid == td->pid)
268 else if (td->runstate < TD_RAMP)
269 kill(td->pid, SIGTERM);
271 struct ioengine_ops *ops = td->io_ops;
273 if (ops && ops->terminate)
280 int fio_running_or_pending_io_threads(void)
282 struct thread_data *td;
284 int nr_io_threads = 0;
287 if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
290 if (td->runstate < TD_EXITED)
295 return -1; /* we only had cpuio threads to begin with */
299 int fio_set_fd_nonblocking(int fd, const char *who)
303 flags = fcntl(fd, F_GETFL);
305 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
307 int new_flags = flags | O_NONBLOCK;
309 new_flags = fcntl(fd, F_SETFL, new_flags);
311 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
318 ENDIAN_INVALID_BE = 1,
320 ENDIAN_INVALID_CONFIG,
324 static int endian_check(void)
335 else if (u.c[0] == 0x12)
338 #if defined(CONFIG_LITTLE_ENDIAN)
340 return ENDIAN_INVALID_BE;
341 #elif defined(CONFIG_BIG_ENDIAN)
343 return ENDIAN_INVALID_LE;
345 return ENDIAN_INVALID_CONFIG;
349 return ENDIAN_BROKEN;
354 int initialize_fio(char *envp[])
360 * We need these to be properly 64-bit aligned, otherwise we
361 * can run into problems on archs that fault on unaligned fp
364 compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
365 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
366 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
367 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
368 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
369 compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
370 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
371 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
372 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
373 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
374 compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
376 compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
377 compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
379 err = endian_check();
381 log_err("fio: endianness settings appear wrong.\n");
383 case ENDIAN_INVALID_BE:
384 log_err("fio: got big-endian when configured for little\n");
386 case ENDIAN_INVALID_LE:
387 log_err("fio: got little-endian when configured for big\n");
389 case ENDIAN_INVALID_CONFIG:
390 log_err("fio: not configured to any endianness\n");
393 log_err("fio: failed to detect endianness\n");
399 log_err("fio: please report this to fio@vger.kernel.org\n");
403 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
404 #error "No available clock source!"
411 if (fio_filelock_init()) {
412 log_err("fio: failed initializing filelock subsys\n");
419 * We need locale for number printing, if it isn't set then just
420 * go with the US format.
422 if (!getenv("LC_NUMERIC"))
423 setlocale(LC_NUMERIC, "en_US");
425 ps = sysconf(_SC_PAGESIZE);
427 log_err("Failed to get page size\n");
438 void deinitialize_fio(void)