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a39fb9ea JA |
1 | #include "fio.h" |
2 | #include "smalloc.h" | |
3 | #include "helper_thread.h" | |
4 | ||
5 | static struct helper_data { | |
6 | volatile int exit; | |
7 | volatile int reset; | |
8 | volatile int do_stat; | |
9 | struct sk_out *sk_out; | |
10 | pthread_t thread; | |
11 | pthread_mutex_t lock; | |
12 | pthread_cond_t cond; | |
13 | struct fio_mutex *startup_mutex; | |
14 | } *helper_data; | |
15 | ||
16 | void helper_thread_destroy(void) | |
17 | { | |
18 | pthread_cond_destroy(&helper_data->cond); | |
19 | pthread_mutex_destroy(&helper_data->lock); | |
20 | sfree(helper_data); | |
21 | } | |
22 | ||
23 | void helper_reset(void) | |
24 | { | |
25 | if (!helper_data) | |
26 | return; | |
27 | ||
28 | pthread_mutex_lock(&helper_data->lock); | |
29 | ||
30 | if (!helper_data->reset) { | |
31 | helper_data->reset = 1; | |
32 | pthread_cond_signal(&helper_data->cond); | |
33 | } | |
34 | ||
35 | pthread_mutex_unlock(&helper_data->lock); | |
36 | } | |
37 | ||
38 | void helper_do_stat(void) | |
39 | { | |
40 | if (!helper_data) | |
41 | return; | |
42 | ||
43 | pthread_mutex_lock(&helper_data->lock); | |
44 | helper_data->do_stat = 1; | |
45 | pthread_cond_signal(&helper_data->cond); | |
46 | pthread_mutex_unlock(&helper_data->lock); | |
47 | } | |
48 | ||
49 | bool helper_should_exit(void) | |
50 | { | |
51 | if (!helper_data) | |
52 | return true; | |
53 | ||
54 | return helper_data->exit; | |
55 | } | |
56 | ||
57 | void helper_thread_exit(void) | |
58 | { | |
59 | void *ret; | |
60 | ||
61 | pthread_mutex_lock(&helper_data->lock); | |
62 | helper_data->exit = 1; | |
63 | pthread_cond_signal(&helper_data->cond); | |
64 | pthread_mutex_unlock(&helper_data->lock); | |
65 | ||
66 | pthread_join(helper_data->thread, &ret); | |
67 | } | |
68 | ||
69 | static void *helper_thread_main(void *data) | |
70 | { | |
71 | struct helper_data *hd = data; | |
72 | unsigned int msec_to_next_event, next_log; | |
73 | struct timeval tv, last_du; | |
74 | int ret = 0; | |
75 | ||
76 | sk_out_assign(hd->sk_out); | |
77 | ||
78 | gettimeofday(&tv, NULL); | |
79 | memcpy(&last_du, &tv, sizeof(tv)); | |
80 | ||
81 | fio_mutex_up(hd->startup_mutex); | |
82 | ||
83 | msec_to_next_event = DISK_UTIL_MSEC; | |
84 | while (!ret && !hd->exit) { | |
85 | struct timespec ts; | |
86 | struct timeval now; | |
87 | uint64_t since_du; | |
88 | ||
89 | timeval_add_msec(&tv, msec_to_next_event); | |
90 | ts.tv_sec = tv.tv_sec; | |
91 | ts.tv_nsec = tv.tv_usec * 1000; | |
92 | ||
93 | pthread_mutex_lock(&hd->lock); | |
94 | pthread_cond_timedwait(&hd->cond, &hd->lock, &ts); | |
95 | ||
96 | gettimeofday(&now, NULL); | |
97 | ||
98 | if (hd->reset) { | |
99 | memcpy(&tv, &now, sizeof(tv)); | |
100 | memcpy(&last_du, &now, sizeof(last_du)); | |
101 | hd->reset = 0; | |
102 | } | |
103 | ||
104 | pthread_mutex_unlock(&hd->lock); | |
105 | ||
106 | since_du = mtime_since(&last_du, &now); | |
107 | if (since_du >= DISK_UTIL_MSEC || DISK_UTIL_MSEC - since_du < 10) { | |
108 | ret = update_io_ticks(); | |
109 | timeval_add_msec(&last_du, DISK_UTIL_MSEC); | |
110 | msec_to_next_event = DISK_UTIL_MSEC; | |
111 | if (since_du >= DISK_UTIL_MSEC) | |
112 | msec_to_next_event -= (since_du - DISK_UTIL_MSEC); | |
dd290fb4 VF |
113 | } else |
114 | msec_to_next_event = DISK_UTIL_MSEC - since_du; | |
a39fb9ea JA |
115 | |
116 | if (hd->do_stat) { | |
117 | hd->do_stat = 0; | |
118 | __show_running_run_stats(); | |
119 | } | |
120 | ||
121 | next_log = calc_log_samples(); | |
122 | if (!next_log) | |
123 | next_log = DISK_UTIL_MSEC; | |
124 | ||
125 | msec_to_next_event = min(next_log, msec_to_next_event); | |
126 | ||
127 | if (!is_backend) | |
128 | print_thread_status(); | |
129 | } | |
130 | ||
131 | fio_writeout_logs(false); | |
132 | ||
133 | sk_out_drop(); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | int helper_thread_create(struct fio_mutex *startup_mutex, struct sk_out *sk_out) | |
138 | { | |
139 | struct helper_data *hd; | |
140 | int ret; | |
141 | ||
142 | hd = smalloc(sizeof(*hd)); | |
143 | ||
144 | setup_disk_util(); | |
145 | ||
146 | hd->sk_out = sk_out; | |
34febb23 JA |
147 | |
148 | ret = mutex_cond_init_pshared(&hd->lock, &hd->cond); | |
149 | if (ret) | |
f9e5b5ee | 150 | return 1; |
34febb23 | 151 | |
a39fb9ea JA |
152 | hd->startup_mutex = startup_mutex; |
153 | ||
154 | ret = pthread_create(&hd->thread, NULL, helper_thread_main, hd); | |
155 | if (ret) { | |
156 | log_err("Can't create helper thread: %s\n", strerror(ret)); | |
157 | return 1; | |
158 | } | |
159 | ||
160 | helper_data = hd; | |
161 | ||
162 | dprint(FD_MUTEX, "wait on startup_mutex\n"); | |
163 | fio_mutex_down(startup_mutex); | |
164 | dprint(FD_MUTEX, "done waiting on startup_mutex\n"); | |
165 | return 0; | |
166 | } |