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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include <string.h>
26 #include <sys/types.h>
27 #include <signal.h>
28 #include <stdint.h>
29 #include <locale.h>
30 #include <fcntl.h>
31
32 #include "fio.h"
33 #include "smalloc.h"
34 #include "os/os.h"
35 #include "filelock.h"
36 #include "helper_thread.h"
37 #include "filehash.h"
38
39 FLIST_HEAD(disk_list);
40
41 unsigned long arch_flags = 0;
42
43 uintptr_t page_mask = 0;
44 uintptr_t page_size = 0;
45
46 /* see os/os.h */
47 static const char *fio_os_strings[os_nr] = {
48 "Invalid",
49 "Linux",
50 "AIX",
51 "FreeBSD",
52 "HP-UX",
53 "OSX",
54 "NetBSD",
55 "OpenBSD",
56 "Solaris",
57 "Windows",
58 "Android",
59 "DragonFly",
60 };
61
62 /* see arch/arch.h */
63 static const char *fio_arch_strings[arch_nr] = {
64 "Invalid",
65 "x86-64",
66 "x86",
67 "ppc",
68 "ia64",
69 "s390",
70 "alpha",
71 "sparc",
72 "sparc64",
73 "arm",
74 "sh",
75 "hppa",
76 "mips",
77 "aarch64",
78 "generic"
79 };
80
reset_io_counters(struct thread_data * td,int all)81 static void reset_io_counters(struct thread_data *td, int all)
82 {
83 int ddir;
84
85 if (all) {
86 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
87 td->stat_io_bytes[ddir] = 0;
88 td->this_io_bytes[ddir] = 0;
89 td->stat_io_blocks[ddir] = 0;
90 td->this_io_blocks[ddir] = 0;
91 td->rate_bytes[ddir] = 0;
92 td->rate_blocks[ddir] = 0;
93 td->bytes_done[ddir] = 0;
94 td->rate_io_issue_bytes[ddir] = 0;
95 td->rate_next_io_time[ddir] = 0;
96 }
97 }
98
99 td->zone_bytes = 0;
100
101 td->last_was_sync = 0;
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->o.loops || 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 td->rwmix_issues = 0;
144 }
145
146 set_epoch_time(td, td->o.log_unix_epoch);
147 memcpy(&td->start, &td->epoch, sizeof(struct timeval));
148 memcpy(&td->iops_sample_time, &td->epoch, sizeof(struct timeval));
149 memcpy(&td->bw_sample_time, &td->epoch, sizeof(struct timeval));
150 memcpy(&td->ss.prev_time, &td->epoch, sizeof(struct timeval));
151
152 lat_target_reset(td);
153 clear_rusage_stat(td);
154 helper_reset();
155 }
156
reset_fio_state(void)157 void reset_fio_state(void)
158 {
159 groupid = 0;
160 thread_number = 0;
161 stat_number = 0;
162 done_secs = 0;
163 }
164
fio_get_os_string(int nr)165 const char *fio_get_os_string(int nr)
166 {
167 if (nr < os_nr)
168 return fio_os_strings[nr];
169
170 return NULL;
171 }
172
fio_get_arch_string(int nr)173 const char *fio_get_arch_string(int nr)
174 {
175 if (nr < arch_nr)
176 return fio_arch_strings[nr];
177
178 return NULL;
179 }
180
181 static const char *td_runstates[] = {
182 "NOT_CREATED",
183 "CREATED",
184 "INITIALIZED",
185 "RAMP",
186 "SETTING_UP",
187 "RUNNING",
188 "PRE_READING",
189 "VERIFYING",
190 "FSYNCING",
191 "FINISHING",
192 "EXITED",
193 "REAPED",
194 };
195
runstate_to_name(int runstate)196 const char *runstate_to_name(int runstate)
197 {
198 compiletime_assert(TD_LAST == 12, "td runstate list");
199 if (runstate >= 0 && runstate < TD_LAST)
200 return td_runstates[runstate];
201
202 return "invalid";
203 }
204
td_set_runstate(struct thread_data * td,int runstate)205 void td_set_runstate(struct thread_data *td, int runstate)
206 {
207 if (td->runstate == runstate)
208 return;
209
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;
214 }
215
td_bump_runstate(struct thread_data * td,int new_state)216 int td_bump_runstate(struct thread_data *td, int new_state)
217 {
218 int old_state = td->runstate;
219
220 td_set_runstate(td, new_state);
221 return old_state;
222 }
223
td_restore_runstate(struct thread_data * td,int old_state)224 void td_restore_runstate(struct thread_data *td, int old_state)
225 {
226 td_set_runstate(td, old_state);
227 }
228
fio_mark_td_terminate(struct thread_data * td)229 void fio_mark_td_terminate(struct thread_data *td)
230 {
231 fio_gettime(&td->terminate_time, NULL);
232 write_barrier();
233 td->terminate = 1;
234 }
235
fio_terminate_threads(unsigned int group_id)236 void fio_terminate_threads(unsigned int group_id)
237 {
238 struct thread_data *td;
239 pid_t pid = getpid();
240 int i;
241
242 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
243
244 for_each_td(td, i) {
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);
248
249 if (td->terminate)
250 continue;
251
252 fio_mark_td_terminate(td);
253 td->o.start_delay = 0;
254
255 /*
256 * if the thread is running, just let it exit
257 */
258 if (!td->pid || pid == td->pid)
259 continue;
260 else if (td->runstate < TD_RAMP)
261 kill(td->pid, SIGTERM);
262 else {
263 struct ioengine_ops *ops = td->io_ops;
264
265 if (ops && ops->terminate)
266 ops->terminate(td);
267 }
268 }
269 }
270 }
271
fio_running_or_pending_io_threads(void)272 int fio_running_or_pending_io_threads(void)
273 {
274 struct thread_data *td;
275 int i;
276 int nr_io_threads = 0;
277
278 for_each_td(td, i) {
279 if (td->io_ops_init && td_ioengine_flagged(td, FIO_NOIO))
280 continue;
281 nr_io_threads++;
282 if (td->runstate < TD_EXITED)
283 return 1;
284 }
285
286 if (!nr_io_threads)
287 return -1; /* we only had cpuio threads to begin with */
288 return 0;
289 }
290
fio_set_fd_nonblocking(int fd,const char * who)291 int fio_set_fd_nonblocking(int fd, const char *who)
292 {
293 int flags;
294
295 flags = fcntl(fd, F_GETFL);
296 if (flags < 0)
297 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
298 else {
299 int new_flags = flags | O_NONBLOCK;
300
301 new_flags = fcntl(fd, F_SETFL, new_flags);
302 if (new_flags < 0)
303 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
304 }
305
306 return flags;
307 }
308
309 enum {
310 ENDIAN_INVALID_BE = 1,
311 ENDIAN_INVALID_LE,
312 ENDIAN_INVALID_CONFIG,
313 ENDIAN_BROKEN,
314 };
315
endian_check(void)316 static int endian_check(void)
317 {
318 union {
319 uint8_t c[8];
320 uint64_t v;
321 } u;
322 int le = 0, be = 0;
323
324 u.v = 0x12;
325 if (u.c[7] == 0x12)
326 be = 1;
327 else if (u.c[0] == 0x12)
328 le = 1;
329
330 #if defined(CONFIG_LITTLE_ENDIAN)
331 if (be)
332 return ENDIAN_INVALID_BE;
333 #elif defined(CONFIG_BIG_ENDIAN)
334 if (le)
335 return ENDIAN_INVALID_LE;
336 #else
337 return ENDIAN_INVALID_CONFIG;
338 #endif
339
340 if (!le && !be)
341 return ENDIAN_BROKEN;
342
343 return 0;
344 }
345
initialize_fio(char * envp[])346 int initialize_fio(char *envp[])
347 {
348 long ps;
349 int err;
350
351 /*
352 * We need these to be properly 64-bit aligned, otherwise we
353 * can run into problems on archs that fault on unaligned fp
354 * access (ARM).
355 */
356 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
357 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
358 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
359 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
360 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
361 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
362 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
363 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
364
365 err = endian_check();
366 if (err) {
367 log_err("fio: endianness settings appear wrong.\n");
368 switch (err) {
369 case ENDIAN_INVALID_BE:
370 log_err("fio: got big-endian when configured for little\n");
371 break;
372 case ENDIAN_INVALID_LE:
373 log_err("fio: got little-endian when configured for big\n");
374 break;
375 case ENDIAN_INVALID_CONFIG:
376 log_err("fio: not configured to any endianness\n");
377 break;
378 case ENDIAN_BROKEN:
379 log_err("fio: failed to detect endianness\n");
380 break;
381 default:
382 assert(0);
383 break;
384 }
385 log_err("fio: please report this to fio@vger.kernel.org\n");
386 return 1;
387 }
388
389 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
390 #error "No available clock source!"
391 #endif
392
393 arch_init(envp);
394
395 sinit();
396
397 if (fio_filelock_init()) {
398 log_err("fio: failed initializing filelock subsys\n");
399 return 1;
400 }
401
402 file_hash_init();
403
404 /*
405 * We need locale for number printing, if it isn't set then just
406 * go with the US format.
407 */
408 if (!getenv("LC_NUMERIC"))
409 setlocale(LC_NUMERIC, "en_US");
410
411 ps = sysconf(_SC_PAGESIZE);
412 if (ps < 0) {
413 log_err("Failed to get page size\n");
414 return 1;
415 }
416
417 page_size = ps;
418 page_mask = ps - 1;
419
420 fio_keywords_init();
421 return 0;
422 }
423
deinitialize_fio(void)424 void deinitialize_fio(void)
425 {
426 fio_keywords_exit();
427 }
428