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 | */ | |
6dd6f2cd | 12 | void usec_spin(unsigned int usec) |
3c39a379 JA |
13 | { |
14 | struct timeval start; | |
15 | ||
02bcaa8c | 16 | fio_gettime(&start, NULL); |
3c39a379 JA |
17 | while (utime_since_now(&start) < usec) |
18 | nop; | |
19 | } | |
20 | ||
21 | void usec_sleep(struct thread_data *td, unsigned long usec) | |
22 | { | |
fd841467 JA |
23 | struct timespec req; |
24 | struct timeval tv; | |
3c39a379 JA |
25 | |
26 | do { | |
fd841467 JA |
27 | unsigned long ts = usec; |
28 | ||
29 | if (usec < ns_granularity) { | |
6dd6f2cd | 30 | usec_spin(usec); |
3c39a379 JA |
31 | break; |
32 | } | |
33 | ||
fd841467 | 34 | ts = usec - ns_granularity; |
3c39a379 | 35 | |
fd841467 JA |
36 | if (ts >= 1000000) { |
37 | req.tv_sec = ts / 1000000; | |
38 | ts -= 1000000 * req.tv_sec; | |
39 | } else | |
40 | req.tv_sec = 0; | |
41 | ||
42 | req.tv_nsec = ts * 1000; | |
43 | fio_gettime(&tv, NULL); | |
44 | ||
45 | if (nanosleep(&req, NULL) < 0) | |
3c39a379 JA |
46 | break; |
47 | ||
fd841467 JA |
48 | ts = utime_since_now(&tv); |
49 | if (ts >= usec) | |
50 | break; | |
3c39a379 | 51 | |
fd841467 | 52 | usec -= ts; |
3c39a379 JA |
53 | } while (!td->terminate); |
54 | } | |
55 | ||
263e529f JA |
56 | unsigned long mtime_since_genesis(void) |
57 | { | |
58 | return mtime_since_now(&genesis); | |
59 | } | |
60 | ||
b29ee5b3 JA |
61 | int in_ramp_time(struct thread_data *td) |
62 | { | |
63 | return td->o.ramp_time && !td->ramp_time_over; | |
64 | } | |
65 | ||
721938ae JA |
66 | int ramp_time_over(struct thread_data *td) |
67 | { | |
68 | struct timeval tv; | |
69 | ||
70 | if (!td->o.ramp_time || td->ramp_time_over) | |
71 | return 1; | |
72 | ||
73 | fio_gettime(&tv, NULL); | |
74 | if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time * 1000) { | |
75 | td->ramp_time_over = 1; | |
b29ee5b3 JA |
76 | reset_all_stats(td); |
77 | td_set_runstate(td, TD_RAMP); | |
721938ae JA |
78 | return 1; |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
03e20d68 | 84 | void fio_time_init(void) |
263e529f | 85 | { |
fd841467 JA |
86 | int i; |
87 | ||
c223da83 JA |
88 | fio_clock_init(); |
89 | ||
fd841467 JA |
90 | /* |
91 | * Check the granularity of the nanosleep function | |
92 | */ | |
93 | for (i = 0; i < 10; i++) { | |
94 | struct timeval tv; | |
95 | struct timespec ts; | |
96 | unsigned long elapsed; | |
97 | ||
98 | fio_gettime(&tv, NULL); | |
99 | ts.tv_sec = 0; | |
100 | ts.tv_nsec = 1000; | |
101 | ||
102 | nanosleep(&ts, NULL); | |
103 | elapsed = utime_since_now(&tv); | |
104 | ||
105 | if (elapsed > ns_granularity) | |
106 | ns_granularity = elapsed; | |
107 | } | |
263e529f | 108 | } |
6043c579 | 109 | |
a2f77c9f JA |
110 | void set_genesis_time(void) |
111 | { | |
112 | fio_gettime(&genesis, NULL); | |
113 | } | |
114 | ||
6043c579 JA |
115 | void fill_start_time(struct timeval *t) |
116 | { | |
117 | memcpy(t, &genesis, sizeof(genesis)); | |
118 | } |