Add --aux-path support
[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",
239b2882 61 "DragonFly",
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62};
63
64static 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
80static void reset_io_counters(struct thread_data *td)
81{
6eaf09d6 82 int ddir;
bcd5abfa 83
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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;
55312f9f 91 td->bytes_done[ddir] = 0;
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92 td->rate_io_issue_bytes[ddir] = 0;
93 td->rate_next_io_time[ddir] = 0;
6eaf09d6 94 }
2e1df07d 95 td->zone_bytes = 0;
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96
97 td->last_was_sync = 0;
bcd5abfa 98 td->rwmix_issues = 0;
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99
100 /*
101 * reset file done count if we are to start over
102 */
44cbc6da 103 if (td->o.time_based || td->o.loops || td->o.do_verify)
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104 td->nr_done_files = 0;
105}
106
107void clear_io_state(struct thread_data *td)
108{
109 struct fio_file *f;
110 unsigned int i;
111
112 reset_io_counters(td);
113
114 close_files(td);
ec803e97 115 for_each_file(td, f, i) {
2e1df07d 116 fio_file_clear_done(f);
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117 f->file_offset = get_start_offset(td, f);
118 }
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119
120 /*
1520f26e 121 * Re-Seed random number generator if rand_repeatable is true
2e1df07d 122 */
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123 if (td->o.rand_repeatable)
124 td_fill_rand_seeds(td);
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125}
126
127void reset_all_stats(struct thread_data *td)
128{
129 struct timeval tv;
130 int i;
131
132 reset_io_counters(td);
133
6eaf09d6 134 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
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135 td->io_bytes[i] = 0;
136 td->io_blocks[i] = 0;
137 td->io_issues[i] = 0;
138 td->ts.total_io_u[i] = 0;
6eaf09d6 139 td->ts.runtime[i] = 0;
5b3faae6 140 td->rwmix_issues = 0;
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141 }
142
143 fio_gettime(&tv, NULL);
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144 memcpy(&td->epoch, &tv, sizeof(tv));
145 memcpy(&td->start, &tv, sizeof(tv));
3e260a46 146
6bb58215 147 lat_target_reset(td);
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148}
149
150void reset_fio_state(void)
151{
152 groupid = 0;
153 thread_number = 0;
2caefeec 154 stat_number = 0;
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155 done_secs = 0;
156}
157
158const char *fio_get_os_string(int nr)
159{
160 if (nr < os_nr)
161 return fio_os_strings[nr];
162
163 return NULL;
164}
165
166const char *fio_get_arch_string(int nr)
167{
168 if (nr < arch_nr)
169 return fio_arch_strings[nr];
170
171 return NULL;
172}
173
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174static const char *td_runstates[] = {
175 "NOT_CREATED",
176 "CREATED",
177 "INITIALIZED",
178 "RAMP",
179 "SETTING_UP",
180 "RUNNING",
181 "PRE_READING",
182 "VERIFYING",
183 "FSYNCING",
184 "FINISHING",
185 "EXITED",
186 "REAPED",
187};
188
189static const char *runstate_to_name(int runstate)
190{
191 compiletime_assert(TD_LAST == 12, "td runstate list");
192 if (runstate >= 0 && runstate < TD_LAST)
193 return td_runstates[runstate];
194
195 return "invalid";
196}
197
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198void td_set_runstate(struct thread_data *td, int runstate)
199{
200 if (td->runstate == runstate)
201 return;
202
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203 dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
204 runstate_to_name(td->runstate),
205 runstate_to_name(runstate));
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206 td->runstate = runstate;
207}
208
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209int td_bump_runstate(struct thread_data *td, int new_state)
210{
211 int old_state = td->runstate;
212
213 td_set_runstate(td, new_state);
214 return old_state;
215}
216
217void td_restore_runstate(struct thread_data *td, int old_state)
218{
219 td_set_runstate(td, old_state);
220}
221
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222void fio_mark_td_terminate(struct thread_data *td)
223{
224 fio_gettime(&td->terminate_time, NULL);
225 write_barrier();
226 td->terminate = 1;
227}
228
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229void fio_terminate_threads(int group_id)
230{
231 struct thread_data *td;
41fa20ec 232 pid_t pid = getpid();
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233 int i;
234
235 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
236
237 for_each_td(td, i) {
238 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
239 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
240 td->o.name, (int) td->pid);
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241
242 if (td->terminate)
243 continue;
244
ebea2133 245 fio_mark_td_terminate(td);
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246 td->o.start_delay = 0;
247
248 /*
249 * if the thread is running, just let it exit
250 */
36d80bc7 251 if (!td->pid || pid == td->pid)
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252 continue;
253 else if (td->runstate < TD_RAMP)
254 kill(td->pid, SIGTERM);
36d80bc7 255 else {
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256 struct ioengine_ops *ops = td->io_ops;
257
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258 if (ops && ops->terminate)
259 ops->terminate(td);
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260 }
261 }
262 }
263}
264
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265int fio_running_or_pending_io_threads(void)
266{
267 struct thread_data *td;
268 int i;
269
270 for_each_td(td, i) {
271 if (td->flags & TD_F_NOIO)
272 continue;
273 if (td->runstate < TD_EXITED)
274 return 1;
275 }
276
277 return 0;
278}
279
3a35845f 280int fio_set_fd_nonblocking(int fd, const char *who)
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281{
282 int flags;
283
284 flags = fcntl(fd, F_GETFL);
285 if (flags < 0)
286 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
287 else {
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288 int new_flags = flags | O_NONBLOCK;
289
290 new_flags = fcntl(fd, F_SETFL, new_flags);
291 if (new_flags < 0)
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292 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
293 }
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294
295 return flags;
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296}
297
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298static int endian_check(void)
299{
300 union {
301 uint8_t c[8];
302 uint64_t v;
303 } u;
304 int le = 0, be = 0;
305
306 u.v = 0x12;
307 if (u.c[7] == 0x12)
308 be = 1;
309 else if (u.c[0] == 0x12)
310 le = 1;
311
312#if defined(CONFIG_LITTLE_ENDIAN)
313 if (be)
314 return 1;
315#elif defined(CONFIG_BIG_ENDIAN)
316 if (le)
317 return 1;
318#else
319 return 1;
320#endif
321
322 if (!le && !be)
323 return 1;
324
325 return 0;
326}
327
328int initialize_fio(char *envp[])
329{
330 long ps;
331
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332 /*
333 * We need these to be properly 64-bit aligned, otherwise we
334 * can run into problems on archs that fault on unaligned fp
335 * access (ARM).
336 */
24ffb6f8 337 compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
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338 compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
339 compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
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340 compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
341 compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
342 compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
343 compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
b8c6b4de 344 compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
976a7756 345
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346 if (endian_check()) {
347 log_err("fio: endianness settings appear wrong.\n");
348 log_err("fio: please report this to fio@vger.kernel.org\n");
349 return 1;
350 }
351
352#if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
353#error "No available clock source!"
354#endif
355
356 arch_init(envp);
357
358 sinit();
359
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360 if (fio_filelock_init()) {
361 log_err("fio: failed initializing filelock subsys\n");
362 return 1;
363 }
364
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365 /*
366 * We need locale for number printing, if it isn't set then just
367 * go with the US format.
368 */
369 if (!getenv("LC_NUMERIC"))
370 setlocale(LC_NUMERIC, "en_US");
371
372 ps = sysconf(_SC_PAGESIZE);
373 if (ps < 0) {
374 log_err("Failed to get page size\n");
375 return 1;
376 }
377
378 page_size = ps;
379 page_mask = ps - 1;
2e1df07d 380
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381 fio_keywords_init();
382 return 0;
383}
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384
385void deinitialize_fio(void)
386{
387 fio_keywords_exit();
388}