Commit | Line | Data |
---|---|---|
3c39a379 JA |
1 | #include <time.h> |
2 | #include <sys/time.h> | |
3 | ||
4 | #include "fio.h" | |
5 | ||
263e529f | 6 | static struct timeval genesis; |
fd841467 | 7 | static unsigned long ns_granularity; |
263e529f | 8 | |
a47591e4 JA |
9 | void timeval_add_msec(struct timeval *tv, unsigned int msec) |
10 | { | |
11 | tv->tv_usec += 1000 * msec; | |
12 | if (tv->tv_usec >= 1000000) { | |
13 | tv->tv_usec -= 1000000; | |
14 | tv->tv_sec++; | |
15 | } | |
16 | } | |
17 | ||
3c39a379 JA |
18 | /* |
19 | * busy looping version for the last few usec | |
20 | */ | |
9cc80b6d | 21 | uint64_t usec_spin(unsigned int usec) |
3c39a379 JA |
22 | { |
23 | struct timeval start; | |
9cc80b6d | 24 | uint64_t t; |
3c39a379 | 25 | |
02bcaa8c | 26 | fio_gettime(&start, NULL); |
9cc80b6d | 27 | while ((t = utime_since_now(&start)) < usec) |
3c39a379 | 28 | nop; |
9cc80b6d JA |
29 | |
30 | return t; | |
3c39a379 JA |
31 | } |
32 | ||
9cc80b6d | 33 | uint64_t usec_sleep(struct thread_data *td, unsigned long usec) |
3c39a379 | 34 | { |
fd841467 JA |
35 | struct timespec req; |
36 | struct timeval tv; | |
9cc80b6d | 37 | uint64_t t = 0; |
3c39a379 JA |
38 | |
39 | do { | |
fd841467 JA |
40 | unsigned long ts = usec; |
41 | ||
42 | if (usec < ns_granularity) { | |
9cc80b6d | 43 | t += usec_spin(usec); |
3c39a379 JA |
44 | break; |
45 | } | |
46 | ||
fd841467 | 47 | ts = usec - ns_granularity; |
3c39a379 | 48 | |
fd841467 JA |
49 | if (ts >= 1000000) { |
50 | req.tv_sec = ts / 1000000; | |
51 | ts -= 1000000 * req.tv_sec; | |
52 | } else | |
53 | req.tv_sec = 0; | |
54 | ||
55 | req.tv_nsec = ts * 1000; | |
56 | fio_gettime(&tv, NULL); | |
57 | ||
58 | if (nanosleep(&req, NULL) < 0) | |
3c39a379 JA |
59 | break; |
60 | ||
fd841467 | 61 | ts = utime_since_now(&tv); |
9cc80b6d | 62 | t += ts; |
fd841467 JA |
63 | if (ts >= usec) |
64 | break; | |
3c39a379 | 65 | |
fd841467 | 66 | usec -= ts; |
3c39a379 | 67 | } while (!td->terminate); |
9cc80b6d JA |
68 | |
69 | return t; | |
3c39a379 JA |
70 | } |
71 | ||
8b22c785 JA |
72 | uint64_t time_since_genesis(void) |
73 | { | |
74 | return time_since_now(&genesis); | |
75 | } | |
76 | ||
aa60bc58 | 77 | uint64_t mtime_since_genesis(void) |
263e529f JA |
78 | { |
79 | return mtime_since_now(&genesis); | |
80 | } | |
81 | ||
0de5b26f JA |
82 | uint64_t utime_since_genesis(void) |
83 | { | |
84 | return utime_since_now(&genesis); | |
85 | } | |
86 | ||
356014ff | 87 | bool in_ramp_time(struct thread_data *td) |
b29ee5b3 JA |
88 | { |
89 | return td->o.ramp_time && !td->ramp_time_over; | |
90 | } | |
91 | ||
ada8f235 JA |
92 | static void parent_update_ramp(struct thread_data *td) |
93 | { | |
94 | struct thread_data *parent = td->parent; | |
95 | ||
96 | if (!parent || parent->ramp_time_over) | |
97 | return; | |
98 | ||
99 | reset_all_stats(parent); | |
100 | parent->ramp_time_over = 1; | |
101 | td_set_runstate(parent, TD_RAMP); | |
102 | } | |
103 | ||
356014ff | 104 | bool ramp_time_over(struct thread_data *td) |
721938ae JA |
105 | { |
106 | struct timeval tv; | |
107 | ||
108 | if (!td->o.ramp_time || td->ramp_time_over) | |
356014ff | 109 | return true; |
721938ae JA |
110 | |
111 | fio_gettime(&tv, NULL); | |
0de5b26f | 112 | if (utime_since(&td->epoch, &tv) >= td->o.ramp_time) { |
721938ae | 113 | td->ramp_time_over = 1; |
b29ee5b3 JA |
114 | reset_all_stats(td); |
115 | td_set_runstate(td, TD_RAMP); | |
ada8f235 | 116 | parent_update_ramp(td); |
356014ff | 117 | return true; |
721938ae JA |
118 | } |
119 | ||
356014ff | 120 | return false; |
721938ae JA |
121 | } |
122 | ||
03e20d68 | 123 | void fio_time_init(void) |
263e529f | 124 | { |
fd841467 JA |
125 | int i; |
126 | ||
c223da83 JA |
127 | fio_clock_init(); |
128 | ||
fd841467 JA |
129 | /* |
130 | * Check the granularity of the nanosleep function | |
131 | */ | |
132 | for (i = 0; i < 10; i++) { | |
133 | struct timeval tv; | |
134 | struct timespec ts; | |
135 | unsigned long elapsed; | |
136 | ||
137 | fio_gettime(&tv, NULL); | |
138 | ts.tv_sec = 0; | |
139 | ts.tv_nsec = 1000; | |
140 | ||
141 | nanosleep(&ts, NULL); | |
142 | elapsed = utime_since_now(&tv); | |
143 | ||
144 | if (elapsed > ns_granularity) | |
145 | ns_granularity = elapsed; | |
146 | } | |
263e529f | 147 | } |
6043c579 | 148 | |
a2f77c9f JA |
149 | void set_genesis_time(void) |
150 | { | |
151 | fio_gettime(&genesis, NULL); | |
152 | } | |
153 | ||
6043c579 JA |
154 | void fill_start_time(struct timeval *t) |
155 | { | |
156 | memcpy(t, &genesis, sizeof(genesis)); | |
157 | } |