| 1 | #include "fio.h" |
| 2 | #include "smalloc.h" |
| 3 | #include "helper_thread.h" |
| 4 | #include "steadystate.h" |
| 5 | |
| 6 | static 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 | |
| 17 | void 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 | |
| 24 | void 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 | |
| 39 | void 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 | |
| 50 | bool helper_should_exit(void) |
| 51 | { |
| 52 | if (!helper_data) |
| 53 | return true; |
| 54 | |
| 55 | return helper_data->exit; |
| 56 | } |
| 57 | |
| 58 | void 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 | |
| 70 | static void *helper_thread_main(void *data) |
| 71 | { |
| 72 | struct helper_data *hd = data; |
| 73 | unsigned int msec_to_next_event, next_log, next_ss = STEADYSTATE_MSEC; |
| 74 | struct timeval tv, last_du, last_ss; |
| 75 | int ret = 0; |
| 76 | |
| 77 | sk_out_assign(hd->sk_out); |
| 78 | |
| 79 | gettimeofday(&tv, NULL); |
| 80 | memcpy(&last_du, &tv, sizeof(tv)); |
| 81 | memcpy(&last_ss, &tv, sizeof(tv)); |
| 82 | |
| 83 | fio_mutex_up(hd->startup_mutex); |
| 84 | |
| 85 | msec_to_next_event = DISK_UTIL_MSEC; |
| 86 | while (!ret && !hd->exit) { |
| 87 | struct timespec ts; |
| 88 | struct timeval now; |
| 89 | uint64_t since_du, since_ss = 0; |
| 90 | |
| 91 | timeval_add_msec(&tv, msec_to_next_event); |
| 92 | ts.tv_sec = tv.tv_sec; |
| 93 | ts.tv_nsec = tv.tv_usec * 1000; |
| 94 | |
| 95 | pthread_mutex_lock(&hd->lock); |
| 96 | pthread_cond_timedwait(&hd->cond, &hd->lock, &ts); |
| 97 | |
| 98 | gettimeofday(&now, NULL); |
| 99 | |
| 100 | if (hd->reset) { |
| 101 | memcpy(&tv, &now, sizeof(tv)); |
| 102 | memcpy(&last_du, &now, sizeof(last_du)); |
| 103 | memcpy(&last_ss, &now, sizeof(last_ss)); |
| 104 | hd->reset = 0; |
| 105 | } |
| 106 | |
| 107 | pthread_mutex_unlock(&hd->lock); |
| 108 | |
| 109 | since_du = mtime_since(&last_du, &now); |
| 110 | if (since_du >= DISK_UTIL_MSEC || DISK_UTIL_MSEC - since_du < 10) { |
| 111 | ret = update_io_ticks(); |
| 112 | timeval_add_msec(&last_du, DISK_UTIL_MSEC); |
| 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); |
| 116 | } else |
| 117 | msec_to_next_event = DISK_UTIL_MSEC - since_du; |
| 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 | |
| 128 | if (steadystate_enabled) { |
| 129 | since_ss = mtime_since(&last_ss, &now); |
| 130 | if (since_ss >= STEADYSTATE_MSEC || STEADYSTATE_MSEC - since_ss < 10) { |
| 131 | steadystate_check(); |
| 132 | timeval_add_msec(&last_ss, since_ss); |
| 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); |
| 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); |
| 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 | |
| 155 | int 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(); |
| 163 | steadystate_setup(); |
| 164 | |
| 165 | hd->sk_out = sk_out; |
| 166 | |
| 167 | ret = mutex_cond_init_pshared(&hd->lock, &hd->cond); |
| 168 | if (ret) |
| 169 | return 1; |
| 170 | |
| 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 | } |