Move some code around to better separate front/backend
[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 "fio.h"
27
28 static const char *fio_os_strings[os_nr] = {
29         "Invalid",
30         "Linux",
31         "AIX",
32         "FreeBSD",
33         "HP-UX",
34         "OSX",
35         "NetBSD",
36         "Solaris",
37         "Windows"
38 };
39
40 static const char *fio_arch_strings[arch_nr] = {
41         "Invalid",
42         "x86-64",
43         "x86",
44         "ppc",
45         "ia64",
46         "s390",
47         "alpha",
48         "sparc",
49         "sparc64",
50         "arm",
51         "sh",
52         "hppa",
53         "generic"
54 };
55
56 static void reset_io_counters(struct thread_data *td)
57 {
58         td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
59         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
60         td->stat_io_blocks[0] = td->stat_io_blocks[1] = 0;
61         td->this_io_blocks[0] = td->this_io_blocks[1] = 0;
62         td->zone_bytes = 0;
63         td->rate_bytes[0] = td->rate_bytes[1] = 0;
64         td->rate_blocks[0] = td->rate_blocks[1] = 0;
65
66         td->last_was_sync = 0;
67
68         /*
69          * reset file done count if we are to start over
70          */
71         if (td->o.time_based || td->o.loops)
72                 td->nr_done_files = 0;
73 }
74
75 void clear_io_state(struct thread_data *td)
76 {
77         struct fio_file *f;
78         unsigned int i;
79
80         reset_io_counters(td);
81
82         close_files(td);
83         for_each_file(td, f, i)
84                 fio_file_clear_done(f);
85
86         /*
87          * Set the same seed to get repeatable runs
88          */
89         td_fill_rand_seeds(td);
90 }
91
92 void reset_all_stats(struct thread_data *td)
93 {
94         struct timeval tv;
95         int i;
96
97         reset_io_counters(td);
98
99         for (i = 0; i < 2; i++) {
100                 td->io_bytes[i] = 0;
101                 td->io_blocks[i] = 0;
102                 td->io_issues[i] = 0;
103                 td->ts.total_io_u[i] = 0;
104         }
105
106         fio_gettime(&tv, NULL);
107         td->ts.runtime[0] = 0;
108         td->ts.runtime[1] = 0;
109         memcpy(&td->epoch, &tv, sizeof(tv));
110         memcpy(&td->start, &tv, sizeof(tv));
111 }
112
113 void reset_fio_state(void)
114 {
115         groupid = 0;
116         thread_number = 0;
117         nr_process = 0;
118         nr_thread = 0;
119         done_secs = 0;
120 }
121
122 const char *fio_get_os_string(int nr)
123 {
124         if (nr < os_nr)
125                 return fio_os_strings[nr];
126
127         return NULL;
128 }
129
130 const char *fio_get_arch_string(int nr)
131 {
132         if (nr < arch_nr)
133                 return fio_arch_strings[nr];
134
135         return NULL;
136 }
137
138 void td_set_runstate(struct thread_data *td, int runstate)
139 {
140         if (td->runstate == runstate)
141                 return;
142
143         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
144                                                 td->runstate, runstate);
145         td->runstate = runstate;
146 }
147
148 void fio_terminate_threads(int group_id)
149 {
150         struct thread_data *td;
151         int i;
152
153         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
154
155         for_each_td(td, i) {
156                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
157                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
158                                                 td->o.name, (int) td->pid);
159                         td->terminate = 1;
160                         td->o.start_delay = 0;
161
162                         /*
163                          * if the thread is running, just let it exit
164                          */
165                         if (!td->pid)
166                                 continue;
167                         else if (td->runstate < TD_RAMP)
168                                 kill(td->pid, SIGTERM);
169                         else {
170                                 struct ioengine_ops *ops = td->io_ops;
171
172                                 if (ops && (ops->flags & FIO_SIGTERM))
173                                         kill(td->pid, SIGTERM);
174                         }
175                 }
176         }
177 }
178
179