time: use correct size type for usecs
[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
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9void timeval_add_msec(struct timeval *tv, unsigned int msec)
10{
249ad5bf 11 unsigned long adj_usec = 1000 * msec;
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12
13 tv->tv_usec += adj_usec;
14 if (adj_usec >= 1000000) {
249ad5bf 15 unsigned long adj_sec = adj_usec / 1000000;
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16
17 tv->tv_usec -= adj_sec * 1000000;
18 tv->tv_sec += adj_sec;
19 }
20 if (tv->tv_usec >= 1000000){
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21 tv->tv_usec -= 1000000;
22 tv->tv_sec++;
23 }
24}
25
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26/*
27 * busy looping version for the last few usec
28 */
9cc80b6d 29uint64_t usec_spin(unsigned int usec)
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30{
31 struct timeval start;
9cc80b6d 32 uint64_t t;
3c39a379 33
02bcaa8c 34 fio_gettime(&start, NULL);
9cc80b6d 35 while ((t = utime_since_now(&start)) < usec)
3c39a379 36 nop;
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37
38 return t;
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39}
40
9cc80b6d 41uint64_t usec_sleep(struct thread_data *td, unsigned long usec)
3c39a379 42{
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43 struct timespec req;
44 struct timeval tv;
9cc80b6d 45 uint64_t t = 0;
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46
47 do {
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48 unsigned long ts = usec;
49
50 if (usec < ns_granularity) {
9cc80b6d 51 t += usec_spin(usec);
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52 break;
53 }
54
fd841467 55 ts = usec - ns_granularity;
3c39a379 56
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57 if (ts >= 1000000) {
58 req.tv_sec = ts / 1000000;
59 ts -= 1000000 * req.tv_sec;
60 } else
61 req.tv_sec = 0;
62
63 req.tv_nsec = ts * 1000;
64 fio_gettime(&tv, NULL);
65
66 if (nanosleep(&req, NULL) < 0)
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67 break;
68
fd841467 69 ts = utime_since_now(&tv);
9cc80b6d 70 t += ts;
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71 if (ts >= usec)
72 break;
3c39a379 73
fd841467 74 usec -= ts;
3c39a379 75 } while (!td->terminate);
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76
77 return t;
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78}
79
8b22c785
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80uint64_t time_since_genesis(void)
81{
82 return time_since_now(&genesis);
83}
84
aa60bc58 85uint64_t mtime_since_genesis(void)
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86{
87 return mtime_since_now(&genesis);
88}
89
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90uint64_t utime_since_genesis(void)
91{
92 return utime_since_now(&genesis);
93}
94
356014ff 95bool in_ramp_time(struct thread_data *td)
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96{
97 return td->o.ramp_time && !td->ramp_time_over;
98}
99
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100static void parent_update_ramp(struct thread_data *td)
101{
102 struct thread_data *parent = td->parent;
103
104 if (!parent || parent->ramp_time_over)
105 return;
106
107 reset_all_stats(parent);
108 parent->ramp_time_over = 1;
109 td_set_runstate(parent, TD_RAMP);
110}
111
356014ff 112bool ramp_time_over(struct thread_data *td)
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113{
114 struct timeval tv;
115
116 if (!td->o.ramp_time || td->ramp_time_over)
356014ff 117 return true;
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118
119 fio_gettime(&tv, NULL);
0de5b26f 120 if (utime_since(&td->epoch, &tv) >= td->o.ramp_time) {
721938ae 121 td->ramp_time_over = 1;
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122 reset_all_stats(td);
123 td_set_runstate(td, TD_RAMP);
ada8f235 124 parent_update_ramp(td);
356014ff 125 return true;
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126 }
127
356014ff 128 return false;
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129}
130
03e20d68 131void fio_time_init(void)
263e529f 132{
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133 int i;
134
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135 fio_clock_init();
136
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137 /*
138 * Check the granularity of the nanosleep function
139 */
140 for (i = 0; i < 10; i++) {
141 struct timeval tv;
142 struct timespec ts;
143 unsigned long elapsed;
144
145 fio_gettime(&tv, NULL);
146 ts.tv_sec = 0;
147 ts.tv_nsec = 1000;
148
149 nanosleep(&ts, NULL);
150 elapsed = utime_since_now(&tv);
151
152 if (elapsed > ns_granularity)
153 ns_granularity = elapsed;
154 }
263e529f 155}
6043c579 156
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157void set_genesis_time(void)
158{
159 fio_gettime(&genesis, NULL);
160}
161
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162void set_epoch_time(struct thread_data *td, int log_unix_epoch)
163{
164 fio_gettime(&td->epoch, NULL);
165 if (log_unix_epoch) {
166 struct timeval tv;
167 gettimeofday(&tv, NULL);
168 td->unix_epoch = (unsigned long long)(tv.tv_sec) * 1000 +
169 (unsigned long long)(tv.tv_usec) / 1000;
170 }
171}
172
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173void fill_start_time(struct timeval *t)
174{
175 memcpy(t, &genesis, sizeof(genesis));
176}