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"
39 * Just expose an empty list, if the OS does not support disk util stats
41 #ifndef FIO_HAVE_DISK_UTIL
42 FLIST_HEAD(disk_list);
45 unsigned long arch_flags = 0;
47 uintptr_t page_mask = 0;
48 uintptr_t page_size = 0;
51 static const char *fio_os_strings[os_nr] = {
67 static const char *fio_arch_strings[arch_nr] = {
85 static void reset_io_counters(struct thread_data *td, int all)
90 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
91 td->stat_io_bytes[ddir] = 0;
92 td->this_io_bytes[ddir] = 0;
93 td->stat_io_blocks[ddir] = 0;
94 td->this_io_blocks[ddir] = 0;
95 td->rate_bytes[ddir] = 0;
96 td->rate_blocks[ddir] = 0;
97 td->bytes_done[ddir] = 0;
98 td->rate_io_issue_bytes[ddir] = 0;
99 td->rate_next_io_time[ddir] = 0;
105 td->last_was_sync = 0;
106 td->rwmix_issues = 0;
109 * reset file done count if we are to start over
111 if (td->o.time_based || td->o.loops || td->o.do_verify)
112 td->nr_done_files = 0;
115 void clear_io_state(struct thread_data *td, int all)
120 reset_io_counters(td, all);
123 for_each_file(td, f, i) {
124 fio_file_clear_done(f);
125 f->file_offset = get_start_offset(td, f);
129 * Re-Seed random number generator if rand_repeatable is true
131 if (td->o.rand_repeatable)
132 td_fill_rand_seeds(td);
135 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 fio_gettime(&tv, NULL);
152 memcpy(&td->epoch, &tv, sizeof(tv));
153 memcpy(&td->start, &tv, sizeof(tv));
154 memcpy(&td->iops_sample_time, &tv, sizeof(tv));
155 memcpy(&td->bw_sample_time, &tv, sizeof(tv));
156 memcpy(&td->ss.prev_time, &tv, sizeof(tv));
158 lat_target_reset(td);
159 clear_rusage_stat(td);
163 void reset_fio_state(void)
171 const char *fio_get_os_string(int nr)
174 return fio_os_strings[nr];
179 const char *fio_get_arch_string(int nr)
182 return fio_arch_strings[nr];
187 static const char *td_runstates[] = {
202 const char *runstate_to_name(int runstate)
204 compiletime_assert(TD_LAST == 12, "td runstate list");
205 if (runstate >= 0 && runstate < TD_LAST)
206 return td_runstates[runstate];
211 void td_set_runstate(struct thread_data *td, int runstate)
213 if (td->runstate == runstate)
216 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
217 runstate_to_name(td->runstate),
218 runstate_to_name(runstate));
219 td->runstate = runstate;
222 int td_bump_runstate(struct thread_data *td, int new_state)
224 int old_state = td->runstate;
226 td_set_runstate(td, new_state);
230 void td_restore_runstate(struct thread_data *td, int old_state)
232 td_set_runstate(td, old_state);
235 void fio_mark_td_terminate(struct thread_data *td)
237 fio_gettime(&td->terminate_time, NULL);
242 void fio_terminate_threads(unsigned int group_id)
244 struct thread_data *td;
245 pid_t pid = getpid();
248 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
251 if (group_id == TERMINATE_ALL || group_id == td->groupid) {
252 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
253 td->o.name, (int) td->pid);
258 fio_mark_td_terminate(td);
259 td->o.start_delay = 0;
262 * if the thread is running, just let it exit
264 if (!td->pid || pid == td->pid)
266 else if (td->runstate < TD_RAMP)
267 kill(td->pid, SIGTERM);
269 struct ioengine_ops *ops = td->io_ops;
271 if (ops && ops->terminate)
278 int fio_running_or_pending_io_threads(void)
280 struct thread_data *td;
282 int nr_io_threads = 0;
285 if (td->flags & TD_F_NOIO)
288 if (td->runstate < TD_EXITED)
293 return -1; /* we only had cpuio threads to begin with */
297 int fio_set_fd_nonblocking(int fd, const char *who)
301 flags = fcntl(fd, F_GETFL);
303 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
305 int new_flags = flags | O_NONBLOCK;
307 new_flags = fcntl(fd, F_SETFL, new_flags);
309 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
315 static int endian_check(void)
326 else if (u.c[0] == 0x12)
329 #if defined(CONFIG_LITTLE_ENDIAN)
332 #elif defined(CONFIG_BIG_ENDIAN)
345 int initialize_fio(char *envp[])
350 * We need these to be properly 64-bit aligned, otherwise we
351 * can run into problems on archs that fault on unaligned fp
354 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
355 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
356 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
357 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
358 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
359 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
360 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
361 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
363 if (endian_check()) {
364 log_err("fio: endianness settings appear wrong.\n");
365 log_err("fio: please report this to fio@vger.kernel.org\n");
369 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
370 #error "No available clock source!"
377 if (fio_filelock_init()) {
378 log_err("fio: failed initializing filelock subsys\n");
383 * We need locale for number printing, if it isn't set then just
384 * go with the US format.
386 if (!getenv("LC_NUMERIC"))
387 setlocale(LC_NUMERIC, "en_US");
389 ps = sysconf(_SC_PAGESIZE);
391 log_err("Failed to get page size\n");
402 void deinitialize_fio(void)