fio: add placeholder gui client ops
[fio.git] / time.c
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1#include <time.h>
2#include <sys/time.h>
3
4#include "fio.h"
5
263e529f 6static struct timeval genesis;
fd841467 7static unsigned long ns_granularity;
263e529f 8
10927316 9unsigned long long utime_since(struct timeval *s, struct timeval *e)
3c39a379 10{
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11 long sec, usec;
12 unsigned long long ret;
5ec10eaa 13
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14 sec = e->tv_sec - s->tv_sec;
15 usec = e->tv_usec - s->tv_usec;
16 if (sec > 0 && usec < 0) {
17 sec--;
18 usec += 1000000;
19 }
20
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21 /*
22 * time warp bug on some kernels?
23 */
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24 if (sec < 0 || (sec == 0 && usec < 0))
25 return 0;
5ec10eaa 26
10927316 27 ret = sec * 1000000ULL + usec;
5ec10eaa 28
2bfe24bd 29 return ret;
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30}
31
10927316 32unsigned long long utime_since_now(struct timeval *s)
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33{
34 struct timeval t;
35
02bcaa8c 36 fio_gettime(&t, NULL);
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37 return utime_since(s, &t);
38}
39
40unsigned long mtime_since(struct timeval *s, struct timeval *e)
41{
2bfe24bd 42 long sec, usec, ret;
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43
44 sec = e->tv_sec - s->tv_sec;
45 usec = e->tv_usec - s->tv_usec;
46 if (sec > 0 && usec < 0) {
47 sec--;
48 usec += 1000000;
49 }
50
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51 sec *= 1000UL;
52 usec /= 1000UL;
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53 ret = sec + usec;
54
55 /*
56 * time warp bug on some kernels?
57 */
58 if (ret < 0)
59 ret = 0;
3c39a379 60
2bfe24bd 61 return ret;
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62}
63
64unsigned long mtime_since_now(struct timeval *s)
65{
66 struct timeval t;
02bcaa8c 67 void *p = __builtin_return_address(0);
3c39a379 68
02bcaa8c 69 fio_gettime(&t, p);
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70 return mtime_since(s, &t);
71}
72
73unsigned long time_since_now(struct timeval *s)
74{
75 return mtime_since_now(s) / 1000;
76}
77
78/*
79 * busy looping version for the last few usec
80 */
6dd6f2cd 81void usec_spin(unsigned int usec)
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82{
83 struct timeval start;
84
02bcaa8c 85 fio_gettime(&start, NULL);
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86 while (utime_since_now(&start) < usec)
87 nop;
88}
89
90void usec_sleep(struct thread_data *td, unsigned long usec)
91{
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92 struct timespec req;
93 struct timeval tv;
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94
95 do {
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96 unsigned long ts = usec;
97
98 if (usec < ns_granularity) {
6dd6f2cd 99 usec_spin(usec);
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100 break;
101 }
102
fd841467 103 ts = usec - ns_granularity;
3c39a379 104
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105 if (ts >= 1000000) {
106 req.tv_sec = ts / 1000000;
107 ts -= 1000000 * req.tv_sec;
108 } else
109 req.tv_sec = 0;
110
111 req.tv_nsec = ts * 1000;
112 fio_gettime(&tv, NULL);
113
114 if (nanosleep(&req, NULL) < 0)
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115 break;
116
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117 ts = utime_since_now(&tv);
118 if (ts >= usec)
119 break;
3c39a379 120
fd841467 121 usec -= ts;
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122 } while (!td->terminate);
123}
124
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125unsigned long mtime_since_genesis(void)
126{
127 return mtime_since_now(&genesis);
128}
129
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130int in_ramp_time(struct thread_data *td)
131{
132 return td->o.ramp_time && !td->ramp_time_over;
133}
134
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135int ramp_time_over(struct thread_data *td)
136{
137 struct timeval tv;
138
139 if (!td->o.ramp_time || td->ramp_time_over)
140 return 1;
141
142 fio_gettime(&tv, NULL);
143 if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time * 1000) {
144 td->ramp_time_over = 1;
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145 reset_all_stats(td);
146 td_set_runstate(td, TD_RAMP);
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147 return 1;
148 }
149
150 return 0;
151}
152
03e20d68 153void fio_time_init(void)
263e529f 154{
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155 int i;
156
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157 fio_clock_init();
158
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159 /*
160 * Check the granularity of the nanosleep function
161 */
162 for (i = 0; i < 10; i++) {
163 struct timeval tv;
164 struct timespec ts;
165 unsigned long elapsed;
166
167 fio_gettime(&tv, NULL);
168 ts.tv_sec = 0;
169 ts.tv_nsec = 1000;
170
171 nanosleep(&ts, NULL);
172 elapsed = utime_since_now(&tv);
173
174 if (elapsed > ns_granularity)
175 ns_granularity = elapsed;
176 }
263e529f 177}
6043c579 178
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179void set_genesis_time(void)
180{
181 fio_gettime(&genesis, NULL);
182}
183
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184void fill_start_time(struct timeval *t)
185{
186 memcpy(t, &genesis, sizeof(genesis));
187}