Commit | Line | Data |
---|---|---|
3c39a379 JA |
1 | #include <time.h> |
2 | #include <sys/time.h> | |
3 | ||
4 | #include "fio.h" | |
5 | ||
8b6a404c | 6 | static struct timespec genesis; |
fd841467 | 7 | static unsigned long ns_granularity; |
263e529f | 8 | |
8b6a404c | 9 | void timespec_add_msec(struct timespec *ts, unsigned int msec) |
a47591e4 | 10 | { |
90e2cd1e | 11 | uint64_t adj_nsec = 1000000ULL * msec; |
d19251c4 | 12 | |
8b6a404c VF |
13 | ts->tv_nsec += adj_nsec; |
14 | if (adj_nsec >= 1000000000) { | |
90e2cd1e | 15 | uint64_t adj_sec = adj_nsec / 1000000000; |
d19251c4 | 16 | |
90e2cd1e | 17 | ts->tv_nsec -= adj_sec * 1000000000; |
8b6a404c | 18 | ts->tv_sec += adj_sec; |
d19251c4 | 19 | } |
90e2cd1e SW |
20 | if (ts->tv_nsec >= 1000000000){ |
21 | ts->tv_nsec -= 1000000000; | |
8b6a404c | 22 | ts->tv_sec++; |
a47591e4 JA |
23 | } |
24 | } | |
25 | ||
3c39a379 JA |
26 | /* |
27 | * busy looping version for the last few usec | |
28 | */ | |
9cc80b6d | 29 | uint64_t usec_spin(unsigned int usec) |
3c39a379 | 30 | { |
8b6a404c | 31 | struct timespec 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; |
9cc80b6d JA |
37 | |
38 | return t; | |
3c39a379 JA |
39 | } |
40 | ||
0d8cc753 CL |
41 | /* |
42 | * busy loop for a fixed amount of cycles | |
43 | */ | |
44 | void cycles_spin(unsigned int n) | |
45 | { | |
46 | unsigned long i; | |
47 | ||
48 | for (i=0; i < n; i++) | |
49 | nop; | |
50 | } | |
51 | ||
9cc80b6d | 52 | uint64_t usec_sleep(struct thread_data *td, unsigned long usec) |
3c39a379 | 53 | { |
fd841467 | 54 | struct timespec req; |
8b6a404c | 55 | struct timespec tv; |
9cc80b6d | 56 | uint64_t t = 0; |
3c39a379 JA |
57 | |
58 | do { | |
fd841467 JA |
59 | unsigned long ts = usec; |
60 | ||
61 | if (usec < ns_granularity) { | |
9cc80b6d | 62 | t += usec_spin(usec); |
3c39a379 JA |
63 | break; |
64 | } | |
65 | ||
fd841467 | 66 | ts = usec - ns_granularity; |
3c39a379 | 67 | |
fd841467 JA |
68 | if (ts >= 1000000) { |
69 | req.tv_sec = ts / 1000000; | |
70 | ts -= 1000000 * req.tv_sec; | |
7eff05d7 JA |
71 | /* |
72 | * Limit sleep to ~1 second at most, otherwise we | |
73 | * don't notice then someone signaled the job to | |
74 | * exit manually. | |
75 | */ | |
76 | if (req.tv_sec > 1) | |
77 | req.tv_sec = 1; | |
fd841467 JA |
78 | } else |
79 | req.tv_sec = 0; | |
80 | ||
81 | req.tv_nsec = ts * 1000; | |
82 | fio_gettime(&tv, NULL); | |
83 | ||
84 | if (nanosleep(&req, NULL) < 0) | |
3c39a379 JA |
85 | break; |
86 | ||
fd841467 | 87 | ts = utime_since_now(&tv); |
9cc80b6d | 88 | t += ts; |
fd841467 JA |
89 | if (ts >= usec) |
90 | break; | |
3c39a379 | 91 | |
fd841467 | 92 | usec -= ts; |
3c39a379 | 93 | } while (!td->terminate); |
9cc80b6d JA |
94 | |
95 | return t; | |
3c39a379 JA |
96 | } |
97 | ||
8b22c785 JA |
98 | uint64_t time_since_genesis(void) |
99 | { | |
100 | return time_since_now(&genesis); | |
101 | } | |
102 | ||
aa60bc58 | 103 | uint64_t mtime_since_genesis(void) |
263e529f JA |
104 | { |
105 | return mtime_since_now(&genesis); | |
106 | } | |
107 | ||
0de5b26f JA |
108 | uint64_t utime_since_genesis(void) |
109 | { | |
110 | return utime_since_now(&genesis); | |
111 | } | |
112 | ||
356014ff | 113 | bool in_ramp_time(struct thread_data *td) |
b29ee5b3 JA |
114 | { |
115 | return td->o.ramp_time && !td->ramp_time_over; | |
116 | } | |
117 | ||
3eeb1620 | 118 | static bool parent_update_ramp(struct thread_data *td) |
ada8f235 JA |
119 | { |
120 | struct thread_data *parent = td->parent; | |
121 | ||
122 | if (!parent || parent->ramp_time_over) | |
3eeb1620 | 123 | return false; |
ada8f235 JA |
124 | |
125 | reset_all_stats(parent); | |
49f3f914 | 126 | parent->ramp_time_over = true; |
ada8f235 | 127 | td_set_runstate(parent, TD_RAMP); |
3eeb1620 | 128 | return true; |
ada8f235 JA |
129 | } |
130 | ||
356014ff | 131 | bool ramp_time_over(struct thread_data *td) |
721938ae | 132 | { |
721938ae | 133 | if (!td->o.ramp_time || td->ramp_time_over) |
356014ff | 134 | return true; |
721938ae | 135 | |
8b6a404c | 136 | if (utime_since_now(&td->epoch) >= td->o.ramp_time) { |
49f3f914 | 137 | td->ramp_time_over = true; |
b29ee5b3 | 138 | reset_all_stats(td); |
8eb142dd | 139 | reset_io_stats(td); |
b29ee5b3 | 140 | td_set_runstate(td, TD_RAMP); |
3eeb1620 JA |
141 | |
142 | /* | |
143 | * If we have a parent, the parent isn't doing IO. Hence | |
144 | * the parent never enters do_io(), which will switch us | |
145 | * from RAMP -> RUNNING. Do this manually here. | |
146 | */ | |
147 | if (parent_update_ramp(td)) | |
148 | td_set_runstate(td, TD_RUNNING); | |
149 | ||
356014ff | 150 | return true; |
721938ae JA |
151 | } |
152 | ||
356014ff | 153 | return false; |
721938ae JA |
154 | } |
155 | ||
03e20d68 | 156 | void fio_time_init(void) |
263e529f | 157 | { |
fd841467 JA |
158 | int i; |
159 | ||
c223da83 JA |
160 | fio_clock_init(); |
161 | ||
fd841467 JA |
162 | /* |
163 | * Check the granularity of the nanosleep function | |
164 | */ | |
165 | for (i = 0; i < 10; i++) { | |
8b6a404c | 166 | struct timespec tv, ts; |
fd841467 JA |
167 | unsigned long elapsed; |
168 | ||
169 | fio_gettime(&tv, NULL); | |
170 | ts.tv_sec = 0; | |
171 | ts.tv_nsec = 1000; | |
172 | ||
173 | nanosleep(&ts, NULL); | |
174 | elapsed = utime_since_now(&tv); | |
175 | ||
176 | if (elapsed > ns_granularity) | |
177 | ns_granularity = elapsed; | |
178 | } | |
263e529f | 179 | } |
6043c579 | 180 | |
a2f77c9f JA |
181 | void set_genesis_time(void) |
182 | { | |
183 | fio_gettime(&genesis, NULL); | |
184 | } | |
185 | ||
12d325ca | 186 | void set_epoch_time(struct thread_data *td, clockid_t log_alternate_epoch_clock_id, clockid_t job_start_clock_id) |
3aea75b1 | 187 | { |
12d325ca | 188 | struct timespec ts; |
3aea75b1 | 189 | fio_gettime(&td->epoch, NULL); |
12d325ca | 190 | clock_gettime(log_alternate_epoch_clock_id, &ts); |
191 | td->alternate_epoch = (unsigned long long)(ts.tv_sec) * 1000 + | |
192 | (unsigned long long)(ts.tv_nsec) / 1000000; | |
193 | if (job_start_clock_id == log_alternate_epoch_clock_id) | |
194 | { | |
195 | td->job_start = td->alternate_epoch; | |
196 | } | |
197 | else | |
198 | { | |
199 | clock_gettime(job_start_clock_id, &ts); | |
200 | td->job_start = (unsigned long long)(ts.tv_sec) * 1000 + | |
201 | (unsigned long long)(ts.tv_nsec) / 1000000; | |
3aea75b1 KC |
202 | } |
203 | } | |
204 | ||
8b6a404c | 205 | void fill_start_time(struct timespec *t) |
6043c579 JA |
206 | { |
207 | memcpy(t, &genesis, sizeof(genesis)); | |
208 | } |