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
37 /*
38 * Just expose an empty list, if the OS does not support disk util stats
39 */
40 #ifndef FIO_HAVE_DISK_UTIL
41 FLIST_HEAD(disk_list);
42 #endif
43
44 unsigned long arch_flags = 0;
45
46 uintptr_t page_mask = 0;
47 uintptr_t page_size = 0;
48
49 static const char *fio_os_strings[os_nr] = {
50 "Invalid",
51 "Linux",
52 "AIX",
53 "FreeBSD",
54 "HP-UX",
55 "OSX",
56 "NetBSD",
57 "OpenBSD",
58 "Solaris",
59 "Windows",
60 "Android",
61 "DragonFly",
62 };
63
64 static const char *fio_arch_strings[arch_nr] = {
65 "Invalid",
66 "x86-64",
67 "x86",
68 "ppc",
69 "ia64",
70 "s390",
71 "alpha",
72 "sparc",
73 "sparc64",
74 "arm",
75 "sh",
76 "hppa",
77 "generic"
78 };
79
reset_io_counters(struct thread_data * td)80 static void reset_io_counters(struct thread_data *td)
81 {
82 int ddir;
83
84 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
85 td->stat_io_bytes[ddir] = 0;
86 td->this_io_bytes[ddir] = 0;
87 td->stat_io_blocks[ddir] = 0;
88 td->this_io_blocks[ddir] = 0;
89 td->rate_bytes[ddir] = 0;
90 td->rate_blocks[ddir] = 0;
91 }
92 td->zone_bytes = 0;
93
94 td->last_was_sync = 0;
95 td->rwmix_issues = 0;
96
97 /*
98 * reset file done count if we are to start over
99 */
100 if (td->o.time_based || td->o.loops || td->o.do_verify)
101 td->nr_done_files = 0;
102 }
103
clear_io_state(struct thread_data * td)104 void clear_io_state(struct thread_data *td)
105 {
106 struct fio_file *f;
107 unsigned int i;
108
109 reset_io_counters(td);
110
111 close_files(td);
112 for_each_file(td, f, i) {
113 fio_file_clear_done(f);
114 f->file_offset = get_start_offset(td, f);
115 }
116
117 /*
118 * Set the same seed to get repeatable runs
119 */
120 td_fill_rand_seeds(td);
121 }
122
reset_all_stats(struct thread_data * td)123 void reset_all_stats(struct thread_data *td)
124 {
125 struct timeval tv;
126 int i;
127
128 reset_io_counters(td);
129
130 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
131 td->io_bytes[i] = 0;
132 td->io_blocks[i] = 0;
133 td->io_issues[i] = 0;
134 td->ts.total_io_u[i] = 0;
135 td->ts.runtime[i] = 0;
136 td->rwmix_issues = 0;
137 }
138
139 fio_gettime(&tv, NULL);
140 memcpy(&td->epoch, &tv, sizeof(tv));
141 memcpy(&td->start, &tv, sizeof(tv));
142
143 lat_target_reset(td);
144 }
145
reset_fio_state(void)146 void reset_fio_state(void)
147 {
148 groupid = 0;
149 thread_number = 0;
150 stat_number = 0;
151 done_secs = 0;
152 }
153
fio_get_os_string(int nr)154 const char *fio_get_os_string(int nr)
155 {
156 if (nr < os_nr)
157 return fio_os_strings[nr];
158
159 return NULL;
160 }
161
fio_get_arch_string(int nr)162 const char *fio_get_arch_string(int nr)
163 {
164 if (nr < arch_nr)
165 return fio_arch_strings[nr];
166
167 return NULL;
168 }
169
td_set_runstate(struct thread_data * td,int runstate)170 void td_set_runstate(struct thread_data *td, int runstate)
171 {
172 if (td->runstate == runstate)
173 return;
174
175 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
176 td->runstate, runstate);
177 td->runstate = runstate;
178 }
179
td_bump_runstate(struct thread_data * td,int new_state)180 int td_bump_runstate(struct thread_data *td, int new_state)
181 {
182 int old_state = td->runstate;
183
184 td_set_runstate(td, new_state);
185 return old_state;
186 }
187
td_restore_runstate(struct thread_data * td,int old_state)188 void td_restore_runstate(struct thread_data *td, int old_state)
189 {
190 td_set_runstate(td, old_state);
191 }
192
fio_mark_td_terminate(struct thread_data * td)193 void fio_mark_td_terminate(struct thread_data *td)
194 {
195 fio_gettime(&td->terminate_time, NULL);
196 write_barrier();
197 td->terminate = 1;
198 }
199
fio_terminate_threads(int group_id)200 void fio_terminate_threads(int group_id)
201 {
202 struct thread_data *td;
203 pid_t pid = getpid();
204 int i;
205
206 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
207
208 for_each_td(td, i) {
209 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
210 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
211 td->o.name, (int) td->pid);
212
213 if (td->terminate)
214 continue;
215
216 fio_mark_td_terminate(td);
217 td->o.start_delay = 0;
218
219 /*
220 * if the thread is running, just let it exit
221 */
222 if (!td->pid || pid == td->pid)
223 continue;
224 else if (td->runstate < TD_RAMP)
225 kill(td->pid, SIGTERM);
226 else {
227 struct ioengine_ops *ops = td->io_ops;
228
229 if (ops && ops->terminate)
230 ops->terminate(td);
231 }
232 }
233 }
234 }
235
fio_running_or_pending_io_threads(void)236 int fio_running_or_pending_io_threads(void)
237 {
238 struct thread_data *td;
239 int i;
240
241 for_each_td(td, i) {
242 if (td->flags & TD_F_NOIO)
243 continue;
244 if (td->runstate < TD_EXITED)
245 return 1;
246 }
247
248 return 0;
249 }
250
fio_set_fd_nonblocking(int fd,const char * who)251 int fio_set_fd_nonblocking(int fd, const char *who)
252 {
253 int flags;
254
255 flags = fcntl(fd, F_GETFL);
256 if (flags < 0)
257 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
258 else {
259 int new_flags = flags | O_NONBLOCK;
260
261 new_flags = fcntl(fd, F_SETFL, new_flags);
262 if (new_flags < 0)
263 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
264 }
265
266 return flags;
267 }
268
endian_check(void)269 static int endian_check(void)
270 {
271 union {
272 uint8_t c[8];
273 uint64_t v;
274 } u;
275 int le = 0, be = 0;
276
277 u.v = 0x12;
278 if (u.c[7] == 0x12)
279 be = 1;
280 else if (u.c[0] == 0x12)
281 le = 1;
282
283 #if defined(CONFIG_LITTLE_ENDIAN)
284 if (be)
285 return 1;
286 #elif defined(CONFIG_BIG_ENDIAN)
287 if (le)
288 return 1;
289 #else
290 return 1;
291 #endif
292
293 if (!le && !be)
294 return 1;
295
296 return 0;
297 }
298
initialize_fio(char * envp[])299 int initialize_fio(char *envp[])
300 {
301 long ps;
302
303 /*
304 * We need these to be properly 64-bit aligned, otherwise we
305 * can run into problems on archs that fault on unaligned fp
306 * access (ARM).
307 */
308 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
309 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
310 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
311 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
312 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
313 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
314 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
315 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
316
317 if (endian_check()) {
318 log_err("fio: endianness settings appear wrong.\n");
319 log_err("fio: please report this to fio@vger.kernel.org\n");
320 return 1;
321 }
322
323 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
324 #error "No available clock source!"
325 #endif
326
327 arch_init(envp);
328
329 sinit();
330
331 if (fio_filelock_init()) {
332 log_err("fio: failed initializing filelock subsys\n");
333 return 1;
334 }
335
336 /*
337 * We need locale for number printing, if it isn't set then just
338 * go with the US format.
339 */
340 if (!getenv("LC_NUMERIC"))
341 setlocale(LC_NUMERIC, "en_US");
342
343 ps = sysconf(_SC_PAGESIZE);
344 if (ps < 0) {
345 log_err("Failed to get page size\n");
346 return 1;
347 }
348
349 page_size = ps;
350 page_mask = ps - 1;
351
352 fio_keywords_init();
353 return 0;
354 }
355