1 /*
2 * fio - the flexible io tester
3 *
4 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
5 * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
6 *
7 * The license below covers all files distributed with fio unless otherwise
8 * noted in the file itself.
9 *
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.
13 *
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.
18 *
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.
22 *
23 */
24
25 #include <string.h>
26 #include <signal.h>
27 #include <stdint.h>
28 #include <locale.h>
29 #include <fcntl.h>
30
31 #include "fio.h"
32 #include "smalloc.h"
33 #include "os/os.h"
34 #include "filelock.h"
35 #include "helper_thread.h"
36 #include "filehash.h"
37
38 FLIST_HEAD(disk_list);
39
40 unsigned long arch_flags = 0;
41
42 uintptr_t page_mask = 0;
43 uintptr_t page_size = 0;
44
45 /* see os/os.h */
46 static const char *fio_os_strings[os_nr] = {
47 "Invalid",
48 "Linux",
49 "AIX",
50 "FreeBSD",
51 "HP-UX",
52 "OSX",
53 "NetBSD",
54 "OpenBSD",
55 "Solaris",
56 "Windows",
57 "Android",
58 "DragonFly",
59 };
60
61 /* see arch/arch.h */
62 static const char *fio_arch_strings[arch_nr] = {
63 "Invalid",
64 "x86-64",
65 "x86",
66 "ppc",
67 "ia64",
68 "s390",
69 "alpha",
70 "sparc",
71 "sparc64",
72 "arm",
73 "sh",
74 "hppa",
75 "mips",
76 "aarch64",
77 "generic"
78 };
79
reset_io_counters(struct thread_data * td,int all)80 static void reset_io_counters(struct thread_data *td, int all)
81 {
82 int ddir;
83
84 if (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;
96 }
97 }
98
99 td->zone_bytes = 0;
100
101 td->last_was_sync = false;
102 td->rwmix_issues = 0;
103
104 /*
105 * reset file done count if we are to start over
106 */
107 if (td->o.time_based || td->loops > 1 || td->o.do_verify)
108 td->nr_done_files = 0;
109 }
110
clear_io_state(struct thread_data * td,int all)111 void clear_io_state(struct thread_data *td, int all)
112 {
113 struct fio_file *f;
114 unsigned int i;
115
116 reset_io_counters(td, all);
117
118 close_files(td);
119 for_each_file(td, f, i) {
120 fio_file_clear_done(f);
121 f->file_offset = get_start_offset(td, f);
122 }
123
124 /*
125 * Re-Seed random number generator if rand_repeatable is true
126 */
127 if (td->o.rand_repeatable)
128 td_fill_rand_seeds(td);
129 }
130
reset_all_stats(struct thread_data * td)131 void reset_all_stats(struct thread_data *td)
132 {
133 int i;
134
135 reset_io_counters(td, 1);
136
137 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
138 td->io_bytes[i] = 0;
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 }
144
145 set_epoch_time(td, td->o.log_unix_epoch);
146 memcpy(&td->start, &td->epoch, sizeof(td->epoch));
147 memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
148 memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
149 memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));
150
151 lat_target_reset(td);
152 clear_rusage_stat(td);
153 helper_reset();
154 }
155
reset_fio_state(void)156 void reset_fio_state(void)
157 {
158 int i;
159
160 groupid = 0;
161 thread_number = 0;
162 cur_segment = 0;
163 for (i = 0; i < nr_segments; i++)
164 segments[i].nr_threads = 0;
165 stat_number = 0;
166 done_secs = 0;
167 }
168
fio_get_os_string(int nr)169 const char *fio_get_os_string(int nr)
170 {
171 if (nr < os_nr)
172 return fio_os_strings[nr];
173
174 return NULL;
175 }
176
fio_get_arch_string(int nr)177 const char *fio_get_arch_string(int nr)
178 {
179 if (nr < arch_nr)
180 return fio_arch_strings[nr];
181
182 return NULL;
183 }
184
185 static const char *td_runstates[] = {
186 "NOT_CREATED",
187 "CREATED",
188 "INITIALIZED",
189 "RAMP",
190 "SETTING_UP",
191 "RUNNING",
192 "PRE_READING",
193 "VERIFYING",
194 "FSYNCING",
195 "FINISHING",
196 "EXITED",
197 "REAPED",
198 };
199
runstate_to_name(int runstate)200 const char *runstate_to_name(int runstate)
201 {
202 compiletime_assert(TD_LAST == 12, "td runstate list");
203 if (runstate >= 0 && runstate < TD_LAST)
204 return td_runstates[runstate];
205
206 return "invalid";
207 }
208
td_set_runstate(struct thread_data * td,int runstate)209 void td_set_runstate(struct thread_data *td, int runstate)
210 {
211 if (td->runstate == runstate)
212 return;
213
214 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
215 runstate_to_name(td->runstate),
216 runstate_to_name(runstate));
217 td->runstate = runstate;
218 }
219
td_bump_runstate(struct thread_data * td,int new_state)220 int td_bump_runstate(struct thread_data *td, int new_state)
221 {
222 int old_state = td->runstate;
223
224 td_set_runstate(td, new_state);
225 return old_state;
226 }
227
td_restore_runstate(struct thread_data * td,int old_state)228 void td_restore_runstate(struct thread_data *td, int old_state)
229 {
230 td_set_runstate(td, old_state);
231 }
232
fio_mark_td_terminate(struct thread_data * td)233 void fio_mark_td_terminate(struct thread_data *td)
234 {
235 fio_gettime(&td->terminate_time, NULL);
236 write_barrier();
237 td->terminate = true;
238 }
239
fio_terminate_threads(unsigned int group_id,unsigned int terminate)240 void fio_terminate_threads(unsigned int group_id, unsigned int terminate)
241 {
242 struct thread_data *td;
243 pid_t pid = getpid();
244 int i;
245
246 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
247
248 for_each_td(td, i) {
249 if ((terminate == TERMINATE_GROUP && group_id == TERMINATE_ALL) ||
250 (terminate == TERMINATE_GROUP && group_id == td->groupid) ||
251 (terminate == TERMINATE_STONEWALL && td->runstate >= TD_RUNNING) ||
252 (terminate == TERMINATE_ALL)) {
253 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
254 td->o.name, (int) td->pid);
255
256 if (td->terminate)
257 continue;
258
259 fio_mark_td_terminate(td);
260 td->o.start_delay = 0;
261
262 /*
263 * if the thread is running, just let it exit
264 */
265 if (!td->pid || pid == td->pid)
266 continue;
267 else if (td->runstate < TD_RAMP)
268 kill(td->pid, SIGTERM);
269 else {
270 struct ioengine_ops *ops = td->io_ops;
271
272 if (ops && ops->terminate)
273 ops->terminate(td);
274 }
275 }
276 }
277 }
278
fio_running_or_pending_io_threads(void)279 int fio_running_or_pending_io_threads(void)
280 {
281 struct thread_data *td;
282 int i;
283 int nr_io_threads = 0;
284
285 for_each_td(td, i) {
286 if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
287 continue;
288 nr_io_threads++;
289 if (td->runstate < TD_EXITED)
290 return 1;
291 }
292
293 if (!nr_io_threads)
294 return -1; /* we only had cpuio threads to begin with */
295 return 0;
296 }
297
fio_set_fd_nonblocking(int fd,const char * who)298 int fio_set_fd_nonblocking(int fd, const char *who)
299 {
300 int flags;
301
302 flags = fcntl(fd, F_GETFL);
303 if (flags < 0)
304 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
305 else {
306 int new_flags = flags | O_NONBLOCK;
307
308 new_flags = fcntl(fd, F_SETFL, new_flags);
309 if (new_flags < 0)
310 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
311 }
312
313 return flags;
314 }
315
316 enum {
317 ENDIAN_INVALID_BE = 1,
318 ENDIAN_INVALID_LE,
319 ENDIAN_INVALID_CONFIG,
320 ENDIAN_BROKEN,
321 };
322
endian_check(void)323 static int endian_check(void)
324 {
325 union {
326 uint8_t c[8];
327 uint64_t v;
328 } u;
329 int le = 0, be = 0;
330
331 u.v = 0x12;
332 if (u.c[7] == 0x12)
333 be = 1;
334 else if (u.c[0] == 0x12)
335 le = 1;
336
337 #if defined(CONFIG_LITTLE_ENDIAN)
338 if (be)
339 return ENDIAN_INVALID_BE;
340 #elif defined(CONFIG_BIG_ENDIAN)
341 if (le)
342 return ENDIAN_INVALID_LE;
343 #else
344 return ENDIAN_INVALID_CONFIG;
345 #endif
346
347 if (!le && !be)
348 return ENDIAN_BROKEN;
349
350 return 0;
351 }
352
initialize_fio(char * envp[])353 int initialize_fio(char *envp[])
354 {
355 long ps;
356 int err;
357
358 /*
359 * We need these to be properly 64-bit aligned, otherwise we
360 * can run into problems on archs that fault on unaligned fp
361 * access (ARM).
362 */
363 compiletime_assert((offsetof(struct thread_data, ts) % sizeof(void *)) == 0, "ts");
364 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
365 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
366 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
367 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
368 compiletime_assert((offsetof(struct thread_data, ts.clat_stat) % 8) == 0, "ts.clat_stat");
369 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
370 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
371 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
372 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
373 compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
374
375 compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
376 compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
377
378 err = endian_check();
379 if (err) {
380 log_err("fio: endianness settings appear wrong.\n");
381 switch (err) {
382 case ENDIAN_INVALID_BE:
383 log_err("fio: got big-endian when configured for little\n");
384 break;
385 case ENDIAN_INVALID_LE:
386 log_err("fio: got little-endian when configured for big\n");
387 break;
388 case ENDIAN_INVALID_CONFIG:
389 log_err("fio: not configured to any endianness\n");
390 break;
391 case ENDIAN_BROKEN:
392 log_err("fio: failed to detect endianness\n");
393 break;
394 default:
395 assert(0);
396 break;
397 }
398 log_err("fio: please report this to fio@vger.kernel.org\n");
399 return 1;
400 }
401
402 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
403 #error "No available clock source!"
404 #endif
405
406 arch_init(envp);
407
408 sinit();
409
410 if (fio_filelock_init()) {
411 log_err("fio: failed initializing filelock subsys\n");
412 return 1;
413 }
414
415 file_hash_init();
416
417 /*
418 * We need locale for number printing, if it isn't set then just
419 * go with the US format.
420 */
421 if (!getenv("LC_NUMERIC"))
422 setlocale(LC_NUMERIC, "en_US");
423
424 ps = sysconf(_SC_PAGESIZE);
425 if (ps < 0) {
426 log_err("Failed to get page size\n");
427 return 1;
428 }
429
430 page_size = ps;
431 page_mask = ps - 1;
432
433 fio_keywords_init();
434 return 0;
435 }
436
deinitialize_fio(void)437 void deinitialize_fio(void)
438 {
439 fio_keywords_exit();
440 }
441