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