Clarify that include files may not contain job sections
[fio.git] / libfio.c
CommitLineData
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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>
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26#include <sys/types.h>
27#include <signal.h>
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28#include <stdint.h>
29#include <locale.h>
4a851614 30#include <fcntl.h>
a569b45f 31
2e1df07d 32#include "fio.h"
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33#include "smalloc.h"
34#include "os/os.h"
243bfe19 35#include "filelock.h"
2e1df07d 36
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37/*
38 * Just expose an empty list, if the OS does not support disk util stats
39 */
40#ifndef FIO_HAVE_DISK_UTIL
41FLIST_HEAD(disk_list);
42#endif
43
44unsigned long arch_flags = 0;
45
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46uintptr_t page_mask = 0;
47uintptr_t page_size = 0;
48
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49static const char *fio_os_strings[os_nr] = {
50 "Invalid",
51 "Linux",
52 "AIX",
53 "FreeBSD",
54 "HP-UX",
55 "OSX",
56 "NetBSD",
1c7eaa7b 57 "OpenBSD",
2e1df07d 58 "Solaris",
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59 "Windows",
60 "Android",
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61};
62
63static 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
79static void reset_io_counters(struct thread_data *td)
80{
6eaf09d6 81 int ddir;
bcd5abfa 82
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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 }
2e1df07d 91 td->zone_bytes = 0;
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92
93 td->last_was_sync = 0;
bcd5abfa 94 td->rwmix_issues = 0;
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95
96 /*
97 * reset file done count if we are to start over
98 */
44cbc6da 99 if (td->o.time_based || td->o.loops || td->o.do_verify)
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100 td->nr_done_files = 0;
101}
102
103void 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
120void reset_all_stats(struct thread_data *td)
121{
122 struct timeval tv;
123 int i;
124
125 reset_io_counters(td);
126
6eaf09d6 127 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
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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;
6eaf09d6 132 td->ts.runtime[i] = 0;
5b3faae6 133 td->rwmix_issues = 0;
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134 }
135
136 fio_gettime(&tv, NULL);
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137 memcpy(&td->epoch, &tv, sizeof(tv));
138 memcpy(&td->start, &tv, sizeof(tv));
3e260a46 139
6bb58215 140 lat_target_reset(td);
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141}
142
143void reset_fio_state(void)
144{
145 groupid = 0;
146 thread_number = 0;
2caefeec 147 stat_number = 0;
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148 done_secs = 0;
149}
150
151const 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
159const 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
167void 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
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177int 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
185void td_restore_runstate(struct thread_data *td, int old_state)
186{
187 td_set_runstate(td, old_state);
188}
189
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190void fio_mark_td_terminate(struct thread_data *td)
191{
192 fio_gettime(&td->terminate_time, NULL);
193 write_barrier();
194 td->terminate = 1;
195}
196
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197void fio_terminate_threads(int group_id)
198{
199 struct thread_data *td;
41fa20ec 200 pid_t pid = getpid();
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201 int i;
202
203 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
204
205 for_each_td(td, i) {
206 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
207 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
208 td->o.name, (int) td->pid);
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209
210 if (td->terminate)
211 continue;
212
ebea2133 213 fio_mark_td_terminate(td);
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214 td->o.start_delay = 0;
215
216 /*
217 * if the thread is running, just let it exit
218 */
36d80bc7 219 if (!td->pid || pid == td->pid)
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220 continue;
221 else if (td->runstate < TD_RAMP)
222 kill(td->pid, SIGTERM);
36d80bc7 223 else {
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224 struct ioengine_ops *ops = td->io_ops;
225
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226 if (ops && ops->terminate)
227 ops->terminate(td);
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228 }
229 }
230 }
231}
232
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233int fio_running_or_pending_io_threads(void)
234{
235 struct thread_data *td;
236 int i;
237
238 for_each_td(td, i) {
239 if (td->flags & TD_F_NOIO)
240 continue;
241 if (td->runstate < TD_EXITED)
242 return 1;
243 }
244
245 return 0;
246}
247
3a35845f 248int fio_set_fd_nonblocking(int fd, const char *who)
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249{
250 int flags;
251
252 flags = fcntl(fd, F_GETFL);
253 if (flags < 0)
254 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
255 else {
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256 int new_flags = flags | O_NONBLOCK;
257
258 new_flags = fcntl(fd, F_SETFL, new_flags);
259 if (new_flags < 0)
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260 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
261 }
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262
263 return flags;
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264}
265
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266static int endian_check(void)
267{
268 union {
269 uint8_t c[8];
270 uint64_t v;
271 } u;
272 int le = 0, be = 0;
273
274 u.v = 0x12;
275 if (u.c[7] == 0x12)
276 be = 1;
277 else if (u.c[0] == 0x12)
278 le = 1;
279
280#if defined(CONFIG_LITTLE_ENDIAN)
281 if (be)
282 return 1;
283#elif defined(CONFIG_BIG_ENDIAN)
284 if (le)
285 return 1;
286#else
287 return 1;
288#endif
289
290 if (!le && !be)
291 return 1;
292
293 return 0;
294}
295
296int initialize_fio(char *envp[])
297{
298 long ps;
299
300 if (endian_check()) {
301 log_err("fio: endianness settings appear wrong.\n");
302 log_err("fio: please report this to fio@vger.kernel.org\n");
303 return 1;
304 }
305
306#if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
307#error "No available clock source!"
308#endif
309
310 arch_init(envp);
311
312 sinit();
313
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314 if (fio_filelock_init()) {
315 log_err("fio: failed initializing filelock subsys\n");
316 return 1;
317 }
318
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319 /*
320 * We need locale for number printing, if it isn't set then just
321 * go with the US format.
322 */
323 if (!getenv("LC_NUMERIC"))
324 setlocale(LC_NUMERIC, "en_US");
325
326 ps = sysconf(_SC_PAGESIZE);
327 if (ps < 0) {
328 log_err("Failed to get page size\n");
329 return 1;
330 }
331
332 page_size = ps;
333 page_mask = ps - 1;
2e1df07d 334
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335 fio_keywords_init();
336 return 0;
337}