1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
#include <time.h>
#include <sys/time.h>
#include "fio.h"
static struct timeval genesis;
static unsigned long ns_granularity;
unsigned long long utime_since(struct timeval *s, struct timeval *e)
{
long sec, usec;
unsigned long long ret;
sec = e->tv_sec - s->tv_sec;
usec = e->tv_usec - s->tv_usec;
if (sec > 0 && usec < 0) {
sec--;
usec += 1000000;
}
/*
* time warp bug on some kernels?
*/
if (sec < 0 || (sec == 0 && usec < 0))
return 0;
ret = sec * 1000000ULL + usec;
return ret;
}
unsigned long long utime_since_now(struct timeval *s)
{
struct timeval t;
fio_gettime(&t, NULL);
return utime_since(s, &t);
}
unsigned long mtime_since(struct timeval *s, struct timeval *e)
{
long sec, usec, ret;
sec = e->tv_sec - s->tv_sec;
usec = e->tv_usec - s->tv_usec;
if (sec > 0 && usec < 0) {
sec--;
usec += 1000000;
}
sec *= 1000UL;
usec /= 1000UL;
ret = sec + usec;
/*
* time warp bug on some kernels?
*/
if (ret < 0)
ret = 0;
return ret;
}
unsigned long mtime_since_now(struct timeval *s)
{
struct timeval t;
void *p = __builtin_return_address(0);
fio_gettime(&t, p);
return mtime_since(s, &t);
}
unsigned long time_since_now(struct timeval *s)
{
return mtime_since_now(s) / 1000;
}
/*
* busy looping version for the last few usec
*/
void __usec_sleep(unsigned int usec)
{
struct timeval start;
fio_gettime(&start, NULL);
while (utime_since_now(&start) < usec)
nop;
}
void usec_sleep(struct thread_data *td, unsigned long usec)
{
struct timespec req;
struct timeval tv;
do {
unsigned long ts = usec;
if (usec < ns_granularity) {
__usec_sleep(usec);
break;
}
ts = usec - ns_granularity;
if (ts >= 1000000) {
req.tv_sec = ts / 1000000;
ts -= 1000000 * req.tv_sec;
} else
req.tv_sec = 0;
req.tv_nsec = ts * 1000;
fio_gettime(&tv, NULL);
if (nanosleep(&req, NULL) < 0)
break;
ts = utime_since_now(&tv);
if (ts >= usec)
break;
usec -= ts;
} while (!td->terminate);
}
void rate_throttle(struct thread_data *td, unsigned long time_spent,
unsigned int bytes)
{
unsigned long usec_cycle;
unsigned int bs;
if (!td->o.rate && !td->o.rate_iops)
return;
if (td_rw(td))
bs = td->o.rw_min_bs;
else if (td_read(td))
bs = td->o.min_bs[DDIR_READ];
else
bs = td->o.min_bs[DDIR_WRITE];
usec_cycle = td->rate_usec_cycle * (bytes / bs);
if (time_spent < usec_cycle) {
unsigned long s = usec_cycle - time_spent;
td->rate_pending_usleep += s;
if (td->rate_pending_usleep >= 100000) {
struct timeval t;
fio_gettime(&t, NULL);
usec_sleep(td, td->rate_pending_usleep);
td->rate_pending_usleep -= utime_since_now(&t);
}
} else {
long overtime = time_spent - usec_cycle;
td->rate_pending_usleep -= overtime;
}
}
unsigned long mtime_since_genesis(void)
{
return mtime_since_now(&genesis);
}
int in_ramp_time(struct thread_data *td)
{
return td->o.ramp_time && !td->ramp_time_over;
}
int ramp_time_over(struct thread_data *td)
{
struct timeval tv;
if (!td->o.ramp_time || td->ramp_time_over)
return 1;
fio_gettime(&tv, NULL);
if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time * 1000) {
td->ramp_time_over = 1;
reset_all_stats(td);
td_set_runstate(td, TD_RAMP);
return 1;
}
return 0;
}
static void fio_init time_init(void)
{
int i;
/*
* Check the granularity of the nanosleep function
*/
for (i = 0; i < 10; i++) {
struct timeval tv;
struct timespec ts;
unsigned long elapsed;
fio_gettime(&tv, NULL);
ts.tv_sec = 0;
ts.tv_nsec = 1000;
nanosleep(&ts, NULL);
elapsed = utime_since_now(&tv);
if (elapsed > ns_granularity)
ns_granularity = elapsed;
}
}
void set_genesis_time(void)
{
fio_gettime(&genesis, NULL);
}
void fill_start_time(struct timeval *t)
{
memcpy(t, &genesis, sizeof(genesis));
}
|
