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 };
62
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 "generic"
77 };
78
reset_io_counters(struct thread_data * td)79 static void reset_io_counters(struct thread_data *td)
80 {
81 int ddir;
82
83 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
84 td->stat_io_bytes[ddir] = 0;
85 td->this_io_bytes[ddir] = 0;
86 td->stat_io_blocks[ddir] = 0;
87 td->this_io_blocks[ddir] = 0;
88 td->rate_bytes[ddir] = 0;
89 td->rate_blocks[ddir] = 0;
90 }
91 td->zone_bytes = 0;
92
93 td->last_was_sync = 0;
94 td->rwmix_issues = 0;
95
96 /*
97 * reset file done count if we are to start over
98 */
99 if (td->o.time_based || td->o.loops || td->o.do_verify)
100 td->nr_done_files = 0;
101 }
102
clear_io_state(struct thread_data * td)103 void clear_io_state(struct thread_data *td)
104 {
105 struct fio_file *f;
106 unsigned int i;
107
108 reset_io_counters(td);
109
110 close_files(td);
111 for_each_file(td, f, i)
112 fio_file_clear_done(f);
113
114 /*
115 * Set the same seed to get repeatable runs
116 */
117 td_fill_rand_seeds(td);
118 }
119
reset_all_stats(struct thread_data * td)120 void reset_all_stats(struct thread_data *td)
121 {
122 struct timeval tv;
123 int i;
124
125 reset_io_counters(td);
126
127 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
128 td->io_bytes[i] = 0;
129 td->io_blocks[i] = 0;
130 td->io_issues[i] = 0;
131 td->ts.total_io_u[i] = 0;
132 td->ts.runtime[i] = 0;
133 td->rwmix_issues = 0;
134 }
135
136 fio_gettime(&tv, NULL);
137 memcpy(&td->epoch, &tv, sizeof(tv));
138 memcpy(&td->start, &tv, sizeof(tv));
139
140 lat_target_reset(td);
141 }
142
reset_fio_state(void)143 void reset_fio_state(void)
144 {
145 groupid = 0;
146 thread_number = 0;
147 stat_number = 0;
148 done_secs = 0;
149 }
150
fio_get_os_string(int nr)151 const char *fio_get_os_string(int nr)
152 {
153 if (nr < os_nr)
154 return fio_os_strings[nr];
155
156 return NULL;
157 }
158
fio_get_arch_string(int nr)159 const char *fio_get_arch_string(int nr)
160 {
161 if (nr < arch_nr)
162 return fio_arch_strings[nr];
163
164 return NULL;
165 }
166
td_set_runstate(struct thread_data * td,int runstate)167 void td_set_runstate(struct thread_data *td, int runstate)
168 {
169 if (td->runstate == runstate)
170 return;
171
172 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
173 td->runstate, runstate);
174 td->runstate = runstate;
175 }
176
td_bump_runstate(struct thread_data * td,int new_state)177 int td_bump_runstate(struct thread_data *td, int new_state)
178 {
179 int old_state = td->runstate;
180
181 td_set_runstate(td, new_state);
182 return old_state;
183 }
184
td_restore_runstate(struct thread_data * td,int old_state)185 void td_restore_runstate(struct thread_data *td, int old_state)
186 {
187 td_set_runstate(td, old_state);
188 }
189
fio_terminate_threads(int group_id)190 void fio_terminate_threads(int group_id)
191 {
192 struct thread_data *td;
193 pid_t pid = getpid();
194 int i;
195
196 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
197
198 for_each_td(td, i) {
199 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
200 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
201 td->o.name, (int) td->pid);
202 td->terminate = 1;
203 td->o.start_delay = 0;
204
205 /*
206 * if the thread is running, just let it exit
207 */
208 if (!td->pid || pid == td->pid)
209 continue;
210 else if (td->runstate < TD_RAMP)
211 kill(td->pid, SIGTERM);
212 else {
213 struct ioengine_ops *ops = td->io_ops;
214
215 if (ops && ops->terminate)
216 ops->terminate(td);
217 }
218 }
219 }
220 }
221
fio_running_or_pending_io_threads(void)222 int fio_running_or_pending_io_threads(void)
223 {
224 struct thread_data *td;
225 int i;
226
227 for_each_td(td, i) {
228 if (td->flags & TD_F_NOIO)
229 continue;
230 if (td->runstate < TD_EXITED)
231 return 1;
232 }
233
234 return 0;
235 }
236
fio_set_fd_nonblocking(int fd,const char * who)237 int fio_set_fd_nonblocking(int fd, const char *who)
238 {
239 int flags;
240
241 flags = fcntl(fd, F_GETFL);
242 if (flags < 0)
243 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
244 else {
245 int new_flags = flags | O_NONBLOCK;
246
247 new_flags = fcntl(fd, F_SETFL, new_flags);
248 if (new_flags < 0)
249 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
250 }
251
252 return flags;
253 }
254
endian_check(void)255 static int endian_check(void)
256 {
257 union {
258 uint8_t c[8];
259 uint64_t v;
260 } u;
261 int le = 0, be = 0;
262
263 u.v = 0x12;
264 if (u.c[7] == 0x12)
265 be = 1;
266 else if (u.c[0] == 0x12)
267 le = 1;
268
269 #if defined(CONFIG_LITTLE_ENDIAN)
270 if (be)
271 return 1;
272 #elif defined(CONFIG_BIG_ENDIAN)
273 if (le)
274 return 1;
275 #else
276 return 1;
277 #endif
278
279 if (!le && !be)
280 return 1;
281
282 return 0;
283 }
284
initialize_fio(char * envp[])285 int initialize_fio(char *envp[])
286 {
287 long ps;
288
289 if (endian_check()) {
290 log_err("fio: endianness settings appear wrong.\n");
291 log_err("fio: please report this to fio@vger.kernel.org\n");
292 return 1;
293 }
294
295 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
296 #error "No available clock source!"
297 #endif
298
299 arch_init(envp);
300
301 sinit();
302
303 if (fio_filelock_init()) {
304 log_err("fio: failed initializing filelock subsys\n");
305 return 1;
306 }
307
308 /*
309 * We need locale for number printing, if it isn't set then just
310 * go with the US format.
311 */
312 if (!getenv("LC_NUMERIC"))
313 setlocale(LC_NUMERIC, "en_US");
314
315 ps = sysconf(_SC_PAGESIZE);
316 if (ps < 0) {
317 log_err("Failed to get page size\n");
318 return 1;
319 }
320
321 page_size = ps;
322 page_mask = ps - 1;
323
324 fio_keywords_init();
325 return 0;
326 }
327