3 #include "helper_thread.h"
4 #include "steadystate.h"
7 static struct helper_data {
11 struct sk_out *sk_out;
15 struct fio_sem *startup_sem;
18 void helper_thread_destroy(void)
20 pthread_cond_destroy(&helper_data->cond);
21 pthread_mutex_destroy(&helper_data->lock);
25 void helper_reset(void)
30 pthread_mutex_lock(&helper_data->lock);
32 if (!helper_data->reset) {
33 helper_data->reset = 1;
34 pthread_cond_signal(&helper_data->cond);
37 pthread_mutex_unlock(&helper_data->lock);
40 void helper_do_stat(void)
45 pthread_mutex_lock(&helper_data->lock);
46 helper_data->do_stat = 1;
47 pthread_cond_signal(&helper_data->cond);
48 pthread_mutex_unlock(&helper_data->lock);
51 bool helper_should_exit(void)
56 return helper_data->exit;
59 void helper_thread_exit(void)
63 pthread_mutex_lock(&helper_data->lock);
64 helper_data->exit = 1;
65 pthread_cond_signal(&helper_data->cond);
66 pthread_mutex_unlock(&helper_data->lock);
68 pthread_join(helper_data->thread, &ret);
71 static void *helper_thread_main(void *data)
73 struct helper_data *hd = data;
74 unsigned int msec_to_next_event, next_log, next_ss = STEADYSTATE_MSEC;
76 struct timespec ts, last_du, last_ss;
79 sk_out_assign(hd->sk_out);
81 gettimeofday(&tv, NULL);
82 ts.tv_sec = tv.tv_sec;
83 ts.tv_nsec = tv.tv_usec * 1000;
84 memcpy(&last_du, &ts, sizeof(ts));
85 memcpy(&last_ss, &ts, sizeof(ts));
87 fio_sem_up(hd->startup_sem);
89 msec_to_next_event = DISK_UTIL_MSEC;
90 while (!ret && !hd->exit) {
91 uint64_t since_du, since_ss = 0;
93 timespec_add_msec(&ts, msec_to_next_event);
95 pthread_mutex_lock(&hd->lock);
96 pthread_cond_timedwait(&hd->cond, &hd->lock, &ts);
98 gettimeofday(&tv, NULL);
99 ts.tv_sec = tv.tv_sec;
100 ts.tv_nsec = tv.tv_usec * 1000;
103 memcpy(&last_du, &ts, sizeof(ts));
104 memcpy(&last_ss, &ts, sizeof(ts));
108 pthread_mutex_unlock(&hd->lock);
110 since_du = mtime_since(&last_du, &ts);
111 if (since_du >= DISK_UTIL_MSEC || DISK_UTIL_MSEC - since_du < 10) {
112 ret = update_io_ticks();
113 timespec_add_msec(&last_du, DISK_UTIL_MSEC);
114 msec_to_next_event = DISK_UTIL_MSEC;
115 if (since_du >= DISK_UTIL_MSEC)
116 msec_to_next_event -= (since_du - DISK_UTIL_MSEC);
118 msec_to_next_event = DISK_UTIL_MSEC - since_du;
122 __show_running_run_stats();
125 next_log = calc_log_samples();
127 next_log = DISK_UTIL_MSEC;
129 if (steadystate_enabled) {
130 since_ss = mtime_since(&last_ss, &ts);
131 if (since_ss >= STEADYSTATE_MSEC || STEADYSTATE_MSEC - since_ss < 10) {
133 timespec_add_msec(&last_ss, since_ss);
134 if (since_ss > STEADYSTATE_MSEC)
135 next_ss = STEADYSTATE_MSEC - (since_ss - STEADYSTATE_MSEC);
137 next_ss = STEADYSTATE_MSEC;
139 next_ss = STEADYSTATE_MSEC - since_ss;
142 msec_to_next_event = min(min(next_log, msec_to_next_event), next_ss);
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);
146 print_thread_status();
149 fio_writeout_logs(false);
155 int helper_thread_create(struct fio_sem *startup_sem, struct sk_out *sk_out)
157 struct helper_data *hd;
160 hd = scalloc(1, sizeof(*hd));
167 ret = mutex_cond_init_pshared(&hd->lock, &hd->cond);
171 hd->startup_sem = startup_sem;
173 ret = pthread_create(&hd->thread, NULL, helper_thread_main, hd);
175 log_err("Can't create helper thread: %s\n", strerror(ret));
181 dprint(FD_MUTEX, "wait on startup_sem\n");
182 fio_sem_down(startup_sem);
183 dprint(FD_MUTEX, "done waiting on startup_sem\n");