verify: make overwriting verified blocks warning more specific
[fio.git] / helper_thread.c
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1#include "fio.h"
2#include "smalloc.h"
3#include "helper_thread.h"
16e56d25 4#include "steadystate.h"
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5
6static struct helper_data {
7 volatile int exit;
8 volatile int reset;
9 volatile int do_stat;
10 struct sk_out *sk_out;
11 pthread_t thread;
12 pthread_mutex_t lock;
13 pthread_cond_t cond;
14 struct fio_mutex *startup_mutex;
15} *helper_data;
16
17void helper_thread_destroy(void)
18{
19 pthread_cond_destroy(&helper_data->cond);
20 pthread_mutex_destroy(&helper_data->lock);
21 sfree(helper_data);
22}
23
24void helper_reset(void)
25{
26 if (!helper_data)
27 return;
28
29 pthread_mutex_lock(&helper_data->lock);
30
31 if (!helper_data->reset) {
32 helper_data->reset = 1;
33 pthread_cond_signal(&helper_data->cond);
34 }
35
36 pthread_mutex_unlock(&helper_data->lock);
37}
38
39void helper_do_stat(void)
40{
41 if (!helper_data)
42 return;
43
44 pthread_mutex_lock(&helper_data->lock);
45 helper_data->do_stat = 1;
46 pthread_cond_signal(&helper_data->cond);
47 pthread_mutex_unlock(&helper_data->lock);
48}
49
50bool helper_should_exit(void)
51{
52 if (!helper_data)
53 return true;
54
55 return helper_data->exit;
56}
57
58void helper_thread_exit(void)
59{
60 void *ret;
61
62 pthread_mutex_lock(&helper_data->lock);
63 helper_data->exit = 1;
64 pthread_cond_signal(&helper_data->cond);
65 pthread_mutex_unlock(&helper_data->lock);
66
67 pthread_join(helper_data->thread, &ret);
68}
69
70static void *helper_thread_main(void *data)
71{
72 struct helper_data *hd = data;
16e56d25 73 unsigned int msec_to_next_event, next_log, next_ss = STEADYSTATE_MSEC;
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74 struct timeval tv;
75 struct timespec ts, last_du, last_ss;
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76 int ret = 0;
77
78 sk_out_assign(hd->sk_out);
79
80 gettimeofday(&tv, NULL);
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81 ts.tv_sec = tv.tv_sec;
82 ts.tv_nsec = tv.tv_usec * 1000;
83 memcpy(&last_du, &ts, sizeof(ts));
84 memcpy(&last_ss, &ts, sizeof(ts));
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85
86 fio_mutex_up(hd->startup_mutex);
87
88 msec_to_next_event = DISK_UTIL_MSEC;
89 while (!ret && !hd->exit) {
16e56d25 90 uint64_t since_du, since_ss = 0;
a39fb9ea 91
8b6a404c 92 timespec_add_msec(&ts, msec_to_next_event);
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93
94 pthread_mutex_lock(&hd->lock);
95 pthread_cond_timedwait(&hd->cond, &hd->lock, &ts);
96
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97 gettimeofday(&tv, NULL);
98 ts.tv_sec = tv.tv_sec;
99 ts.tv_nsec = tv.tv_usec * 1000;
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100
101 if (hd->reset) {
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102 memcpy(&last_du, &ts, sizeof(ts));
103 memcpy(&last_ss, &ts, sizeof(ts));
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104 hd->reset = 0;
105 }
106
107 pthread_mutex_unlock(&hd->lock);
108
8b6a404c 109 since_du = mtime_since(&last_du, &ts);
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110 if (since_du >= DISK_UTIL_MSEC || DISK_UTIL_MSEC - since_du < 10) {
111 ret = update_io_ticks();
8b6a404c 112 timespec_add_msec(&last_du, DISK_UTIL_MSEC);
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113 msec_to_next_event = DISK_UTIL_MSEC;
114 if (since_du >= DISK_UTIL_MSEC)
115 msec_to_next_event -= (since_du - DISK_UTIL_MSEC);
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116 } else
117 msec_to_next_event = DISK_UTIL_MSEC - since_du;
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118
119 if (hd->do_stat) {
120 hd->do_stat = 0;
121 __show_running_run_stats();
122 }
123
124 next_log = calc_log_samples();
125 if (!next_log)
126 next_log = DISK_UTIL_MSEC;
127
84784e07 128 if (steadystate_enabled) {
8b6a404c 129 since_ss = mtime_since(&last_ss, &ts);
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130 if (since_ss >= STEADYSTATE_MSEC || STEADYSTATE_MSEC - since_ss < 10) {
131 steadystate_check();
8b6a404c 132 timespec_add_msec(&last_ss, since_ss);
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133 if (since_ss > STEADYSTATE_MSEC)
134 next_ss = STEADYSTATE_MSEC - (since_ss - STEADYSTATE_MSEC);
135 else
136 next_ss = STEADYSTATE_MSEC;
137 }
138 else
139 next_ss = STEADYSTATE_MSEC - since_ss;
140 }
141
142 msec_to_next_event = min(min(next_log, msec_to_next_event), next_ss);
e569ca6b 143 dprint(FD_HELPERTHREAD, "since_ss: %llu, next_ss: %u, next_log: %u, msec_to_next_event: %u\n", (unsigned long long)since_ss, next_ss, next_log, msec_to_next_event);
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144
145 if (!is_backend)
146 print_thread_status();
147 }
148
149 fio_writeout_logs(false);
150
151 sk_out_drop();
152 return NULL;
153}
154
155int helper_thread_create(struct fio_mutex *startup_mutex, struct sk_out *sk_out)
156{
157 struct helper_data *hd;
158 int ret;
159
160 hd = smalloc(sizeof(*hd));
161
162 setup_disk_util();
16e56d25 163 steadystate_setup();
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164
165 hd->sk_out = sk_out;
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166
167 ret = mutex_cond_init_pshared(&hd->lock, &hd->cond);
168 if (ret)
f9e5b5ee 169 return 1;
34febb23 170
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171 hd->startup_mutex = startup_mutex;
172
173 ret = pthread_create(&hd->thread, NULL, helper_thread_main, hd);
174 if (ret) {
175 log_err("Can't create helper thread: %s\n", strerror(ret));
176 return 1;
177 }
178
179 helper_data = hd;
180
181 dprint(FD_MUTEX, "wait on startup_mutex\n");
182 fio_mutex_down(startup_mutex);
183 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
184 return 0;
185}