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] = {
82 static void reset_io_counters(struct thread_data *td, int all)
87 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
88 td->stat_io_bytes[ddir] = 0;
89 td->this_io_bytes[ddir] = 0;
90 td->stat_io_blocks[ddir] = 0;
91 td->this_io_blocks[ddir] = 0;
92 td->last_rate_check_bytes[ddir] = 0;
93 td->last_rate_check_blocks[ddir] = 0;
94 td->bytes_done[ddir] = 0;
95 td->rate_io_issue_bytes[ddir] = 0;
96 td->rate_next_io_time[ddir] = 0;
97 td->last_usec[ddir] = 0;
99 td->bytes_verified = 0;
104 td->last_was_sync = false;
105 td->rwmix_issues = 0;
108 * reset file done count if we are to start over
110 if (td->o.time_based || td->loops > 1 || td->o.do_verify)
111 td->nr_done_files = 0;
114 void clear_io_state(struct thread_data *td, int all)
119 reset_io_counters(td, all);
122 for_each_file(td, f, i) {
123 fio_file_clear_done(f);
124 f->file_offset = get_start_offset(td, f);
128 * Re-Seed random number generator if rand_repeatable is true
130 if (td->o.rand_repeatable)
131 td_fill_rand_seeds(td);
134 void reset_all_stats(struct thread_data *td)
136 unsigned long long b;
139 reset_io_counters(td, 1);
141 b = ddir_rw_sum(td->thinktime_blocks_counter);
142 td->last_thinktime_blocks -= b;
144 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
146 td->io_blocks[i] = 0;
147 td->io_issues[i] = 0;
148 td->ts.total_io_u[i] = 0;
149 td->ts.runtime[i] = 0;
152 set_epoch_time(td, td->o.log_alternate_epoch_clock_id, td->o.job_start_clock_id);
153 memcpy(&td->start, &td->epoch, sizeof(td->epoch));
154 memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
155 memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
156 memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));
158 td->last_thinktime = td->epoch;
160 lat_target_reset(td);
161 clear_rusage_stat(td);
165 void reset_fio_state(void)
172 for (i = 0; i < nr_segments; i++)
173 segments[i].nr_threads = 0;
178 const char *fio_get_os_string(int nr)
181 return fio_os_strings[nr];
186 const char *fio_get_arch_string(int nr)
189 return fio_arch_strings[nr];
194 static const char *td_runstates[] = {
209 const char *runstate_to_name(int runstate)
211 compiletime_assert(TD_LAST == 12, "td runstate list");
212 if (runstate >= 0 && runstate < TD_LAST)
213 return td_runstates[runstate];
218 void td_set_runstate(struct thread_data *td, int runstate)
220 if (td->runstate == runstate)
223 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
224 runstate_to_name(td->runstate),
225 runstate_to_name(runstate));
226 td->runstate = runstate;
229 int td_bump_runstate(struct thread_data *td, int new_state)
231 int old_state = td->runstate;
233 td_set_runstate(td, new_state);
237 void td_restore_runstate(struct thread_data *td, int old_state)
239 td_set_runstate(td, old_state);
242 void fio_mark_td_terminate(struct thread_data *td)
244 fio_gettime(&td->terminate_time, NULL);
246 td->terminate = true;
249 void fio_terminate_threads(unsigned int group_id, unsigned int terminate)
251 pid_t pid = getpid();
253 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
256 if ((terminate == TERMINATE_GROUP && group_id == TERMINATE_ALL) ||
257 (terminate == TERMINATE_GROUP && group_id == td->groupid) ||
258 (terminate == TERMINATE_STONEWALL && td->runstate >= TD_RUNNING) ||
259 (terminate == TERMINATE_ALL)) {
260 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
261 td->o.name, (int) td->pid);
266 fio_mark_td_terminate(td);
267 td->o.start_delay = 0;
270 * if the thread is running, just let it exit
272 if (!td->pid || pid == td->pid)
274 else if (td->runstate < TD_RAMP)
275 kill(td->pid, SIGTERM);
277 struct ioengine_ops *ops = td->io_ops;
279 if (ops && ops->terminate)
286 int fio_running_or_pending_io_threads(void)
288 int nr_io_threads = 0;
291 if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
294 if (td->runstate < TD_EXITED)
299 return -1; /* we only had cpuio threads to begin with */
303 int fio_set_fd_nonblocking(int fd, const char *who)
307 flags = fcntl(fd, F_GETFL);
309 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
311 int new_flags = flags | O_NONBLOCK;
313 new_flags = fcntl(fd, F_SETFL, new_flags);
315 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
322 ENDIAN_INVALID_BE = 1,
324 ENDIAN_INVALID_CONFIG,
328 static int endian_check(void)
339 else if (u.c[0] == 0x12)
342 #if defined(CONFIG_LITTLE_ENDIAN)
344 return ENDIAN_INVALID_BE;
345 #elif defined(CONFIG_BIG_ENDIAN)
347 return ENDIAN_INVALID_LE;
349 return ENDIAN_INVALID_CONFIG;
353 return ENDIAN_BROKEN;
358 int initialize_fio(char *envp[])
364 * We need these to be properly 64-bit aligned, otherwise we
365 * can run into problems on archs that fault on unaligned fp
368 compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
369 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
370 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
371 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
372 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
373 compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
374 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
375 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
376 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
377 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
378 compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
380 compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
381 compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
383 err = endian_check();
385 log_err("fio: endianness settings appear wrong.\n");
387 case ENDIAN_INVALID_BE:
388 log_err("fio: got big-endian when configured for little\n");
390 case ENDIAN_INVALID_LE:
391 log_err("fio: got little-endian when configured for big\n");
393 case ENDIAN_INVALID_CONFIG:
394 log_err("fio: not configured to any endianness\n");
397 log_err("fio: failed to detect endianness\n");
403 log_err("fio: please report this to fio@vger.kernel.org\n");
407 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
408 #error "No available clock source!"
415 if (fio_filelock_init()) {
416 log_err("fio: failed initializing filelock subsys\n");
423 * We need locale for number printing, if it isn't set then just
424 * go with the US format.
426 if (!getenv("LC_NUMERIC"))
427 setlocale(LC_NUMERIC, "en_US");
429 ps = sysconf(_SC_PAGESIZE);
431 log_err("Failed to get page size\n");
442 void deinitialize_fio(void)