Wire up pmemblk
[fio.git] / libfio.c
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
80 static void reset_io_counters(struct thread_data *td, int all)
81 {
82         int ddir;
83
84         if (all) {
85                 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
86                         td->stat_io_bytes[ddir] = 0;
87                         td->this_io_bytes[ddir] = 0;
88                         td->stat_io_blocks[ddir] = 0;
89                         td->this_io_blocks[ddir] = 0;
90                         td->rate_bytes[ddir] = 0;
91                         td->rate_blocks[ddir] = 0;
92                         td->bytes_done[ddir] = 0;
93                         td->rate_io_issue_bytes[ddir] = 0;
94                         td->rate_next_io_time[ddir] = 0;
95                 }
96         }
97
98         td->zone_bytes = 0;
99
100         td->last_was_sync = 0;
101         td->rwmix_issues = 0;
102
103         /*
104          * reset file done count if we are to start over
105          */
106         if (td->o.time_based || td->o.loops || td->o.do_verify)
107                 td->nr_done_files = 0;
108 }
109
110 void clear_io_state(struct thread_data *td, int all)
111 {
112         struct fio_file *f;
113         unsigned int i;
114
115         reset_io_counters(td, all);
116
117         close_files(td);
118         for_each_file(td, f, i) {
119                 fio_file_clear_done(f);
120                 f->file_offset = get_start_offset(td, f);
121         }
122
123         /*
124          * Re-Seed random number generator if rand_repeatable is true
125          */
126         if (td->o.rand_repeatable)
127                 td_fill_rand_seeds(td);
128 }
129
130 void reset_all_stats(struct thread_data *td)
131 {
132         struct timeval tv;
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         fio_gettime(&tv, NULL);
147         memcpy(&td->epoch, &tv, sizeof(tv));
148         memcpy(&td->start, &tv, sizeof(tv));
149         memcpy(&td->iops_sample_time, &tv, sizeof(tv));
150         memcpy(&td->bw_sample_time, &tv, sizeof(tv));
151
152         lat_target_reset(td);
153         clear_rusage_stat(td);
154 }
155
156 void reset_fio_state(void)
157 {
158         groupid = 0;
159         thread_number = 0;
160         stat_number = 0;
161         done_secs = 0;
162 }
163
164 const char *fio_get_os_string(int nr)
165 {
166         if (nr < os_nr)
167                 return fio_os_strings[nr];
168
169         return NULL;
170 }
171
172 const char *fio_get_arch_string(int nr)
173 {
174         if (nr < arch_nr)
175                 return fio_arch_strings[nr];
176
177         return NULL;
178 }
179
180 static const char *td_runstates[] = {
181         "NOT_CREATED",
182         "CREATED",
183         "INITIALIZED",
184         "RAMP",
185         "SETTING_UP",
186         "RUNNING",
187         "PRE_READING",
188         "VERIFYING",
189         "FSYNCING",
190         "FINISHING",
191         "EXITED",
192         "REAPED",
193 };
194
195 const char *runstate_to_name(int runstate)
196 {
197         compiletime_assert(TD_LAST == 12, "td runstate list");
198         if (runstate >= 0 && runstate < TD_LAST)
199                 return td_runstates[runstate];
200
201         return "invalid";
202 }
203
204 void td_set_runstate(struct thread_data *td, int runstate)
205 {
206         if (td->runstate == runstate)
207                 return;
208
209         dprint(FD_PROCESS, "pid=%d: runstate %s -> %s\n", (int) td->pid,
210                                                 runstate_to_name(td->runstate),
211                                                 runstate_to_name(runstate));
212         td->runstate = runstate;
213 }
214
215 int td_bump_runstate(struct thread_data *td, int new_state)
216 {
217         int old_state = td->runstate;
218
219         td_set_runstate(td, new_state);
220         return old_state;
221 }
222
223 void td_restore_runstate(struct thread_data *td, int old_state)
224 {
225         td_set_runstate(td, old_state);
226 }
227
228 void fio_mark_td_terminate(struct thread_data *td)
229 {
230         fio_gettime(&td->terminate_time, NULL);
231         write_barrier();
232         td->terminate = 1;
233 }
234
235 void fio_terminate_threads(unsigned int group_id)
236 {
237         struct thread_data *td;
238         pid_t pid = getpid();
239         int i;
240
241         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
242
243         for_each_td(td, i) {
244                 if (group_id == TERMINATE_ALL || group_id == td->groupid) {
245                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
246                                                 td->o.name, (int) td->pid);
247
248                         if (td->terminate)
249                                 continue;
250
251                         fio_mark_td_terminate(td);
252                         td->o.start_delay = 0;
253
254                         /*
255                          * if the thread is running, just let it exit
256                          */
257                         if (!td->pid || pid == td->pid)
258                                 continue;
259                         else if (td->runstate < TD_RAMP)
260                                 kill(td->pid, SIGTERM);
261                         else {
262                                 struct ioengine_ops *ops = td->io_ops;
263
264                                 if (ops && ops->terminate)
265                                         ops->terminate(td);
266                         }
267                 }
268         }
269 }
270
271 int fio_running_or_pending_io_threads(void)
272 {
273         struct thread_data *td;
274         int i;
275
276         for_each_td(td, i) {
277                 if (td->flags & TD_F_NOIO)
278                         continue;
279                 if (td->runstate < TD_EXITED)
280                         return 1;
281         }
282
283         return 0;
284 }
285
286 int fio_set_fd_nonblocking(int fd, const char *who)
287 {
288         int flags;
289
290         flags = fcntl(fd, F_GETFL);
291         if (flags < 0)
292                 log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
293         else {
294                 int new_flags = flags | O_NONBLOCK;
295
296                 new_flags = fcntl(fd, F_SETFL, new_flags);
297                 if (new_flags < 0)
298                         log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
299         }
300
301         return flags;
302 }
303
304 static int endian_check(void)
305 {
306         union {
307                 uint8_t c[8];
308                 uint64_t v;
309         } u;
310         int le = 0, be = 0;
311
312         u.v = 0x12;
313         if (u.c[7] == 0x12)
314                 be = 1;
315         else if (u.c[0] == 0x12)
316                 le = 1;
317
318 #if defined(CONFIG_LITTLE_ENDIAN)
319         if (be)
320                 return 1;
321 #elif defined(CONFIG_BIG_ENDIAN)
322         if (le)
323                 return 1;
324 #else
325         return 1;
326 #endif
327
328         if (!le && !be)
329                 return 1;
330
331         return 0;
332 }
333
334 int initialize_fio(char *envp[])
335 {
336         long ps;
337
338         /*
339          * We need these to be properly 64-bit aligned, otherwise we
340          * can run into problems on archs that fault on unaligned fp
341          * access (ARM).
342          */
343         compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
344         compiletime_assert((offsetof(struct thread_stat, total_run_time) % 8) == 0, "total_run_time");
345         compiletime_assert((offsetof(struct thread_stat, total_err_count) % 8) == 0, "total_err_count");
346         compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
347         compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
348         compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
349         compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
350         compiletime_assert((offsetof(struct thread_options_pack, latency_percentile) % 8) == 0, "latency_percentile");
351
352         if (endian_check()) {
353                 log_err("fio: endianness settings appear wrong.\n");
354                 log_err("fio: please report this to fio@vger.kernel.org\n");
355                 return 1;
356         }
357
358 #if !defined(CONFIG_GETTIMEOFDAY) && !defined(CONFIG_CLOCK_GETTIME)
359 #error "No available clock source!"
360 #endif
361
362         arch_init(envp);
363
364         sinit();
365
366         if (fio_filelock_init()) {
367                 log_err("fio: failed initializing filelock subsys\n");
368                 return 1;
369         }
370
371         /*
372          * We need locale for number printing, if it isn't set then just
373          * go with the US format.
374          */
375         if (!getenv("LC_NUMERIC"))
376                 setlocale(LC_NUMERIC, "en_US");
377
378         ps = sysconf(_SC_PAGESIZE);
379         if (ps < 0) {
380                 log_err("Failed to get page size\n");
381                 return 1;
382         }
383
384         page_size = ps;
385         page_mask = ps - 1;
386
387         fio_keywords_init();
388         return 0;
389 }
390
391 void deinitialize_fio(void)
392 {
393         fio_keywords_exit();
394 }