int SrsServer::do_cycle()
{
int ret = ERROR_SUCCESS;
// find the max loop
int max = srs_max(0, SRS_SYS_TIME_RESOLUTION_MS_TIMES);
max = srs_max(max, SRS_SYS_RUSAGE_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_CPU_STAT_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_MEMINFO_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES);
// the deamon thread, update the time cache
while (true) {
for (int i = 1; i < max + 1; i++) {
st_usleep(SRS_SYS_CYCLE_INTERVAL * 1000);
// for gperf heap checker,
// @see: research/gperftools/heap-checker/heap_checker.cc
// if user interrupt the program, exit to check mem leak.
// but, if gperf, use reload to ensure main return normally,
// because directly exit will cause core-dump.
#ifdef SRS_AUTO_GPERF_MC
if (signal_gmc_stop) {
srs_warn("gmc got singal to stop server.");
return ret;
}
#endif
if (signal_reload) {
signal_reload = false;
srs_info("get signal reload, to reload the config.");
if ((ret = _srs_config->reload()) != ERROR_SUCCESS) {
srs_error("reload config failed. ret=%d", ret);
return ret;
}
srs_trace("reload config success.");
}
// update the cache time or rusage.
if ((i % SRS_SYS_TIME_RESOLUTION_MS_TIMES) == 0) {
srs_update_system_time_ms();
}
if ((i % SRS_SYS_RUSAGE_RESOLUTION_TIMES) == 0) {
srs_update_system_rusage();
}
if ((i % SRS_SYS_CPU_STAT_RESOLUTION_TIMES) == 0) {
srs_update_proc_stat();
}
if ((i % SRS_SYS_MEMINFO_RESOLUTION_TIMES) == 0) {
srs_update_meminfo();
}
if ((i % SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES) == 0) {
srs_update_platform_info();
}
}
}
return ret;
}
int srs_hijack_io_set_recv_timeout(srs_hijack_io_t ctx, int64_t timeout_us)
{
SrsBlockSyncSocket* skt = (SrsBlockSyncSocket*)ctx;
int sec = (int)(timeout_us / 1000000LL);
int microsec = (int)(timeout_us % 1000000LL);
sec = srs_max(0, sec);
microsec = srs_max(0, microsec);
struct timeval tv = { sec , microsec };
if (setsockopt(skt->fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) {
return SOCKET_ERRNO();
}
skt->recv_timeout = timeout_us;
return ERROR_SUCCESS;
}
void srs_update_system_time_ms()
{
timeval now;
gettimeofday(&now, NULL);
// we must convert the tv_sec/tv_usec to int64_t.
_srs_system_time_us_cache = ((int64_t)now.tv_sec) * 1000 * 1000 + (int64_t)now.tv_usec;
_srs_system_time_us_cache = srs_max(0, _srs_system_time_us_cache);
}
void SrsPithyPrint::elapse()
{
SrsStageInfo* stage = _srs_stages[stage_id];
srs_assert(stage != NULL);
int64_t diff = srs_get_system_time_ms() - previous_tick;
diff = srs_max(0, diff);
stage->elapse(diff);
_age += diff;
previous_tick = srs_get_system_time_ms();
}
int SrsRtmpJitter::correct(SrsSharedPtrMessage* msg, int tba, int tbv)
{
int ret = ERROR_SUCCESS;
int sample_rate = tba;
int frame_rate = tbv;
/**
* we use a very simple time jitter detect/correct algorithm:
* 1. delta: ensure the delta is positive and valid,
* we set the delta to DEFAULT_FRAME_TIME_MS,
* if the delta of time is nagative or greater than CONST_MAX_JITTER_MS.
* 2. last_pkt_time: specifies the original packet time,
* is used to detect next jitter.
* 3. last_pkt_correct_time: simply add the positive delta,
* and enforce the time monotonically.
*/
u_int32_t time = msg->header.timestamp;
int32_t delta = time - last_pkt_time;
// if jitter detected, reset the delta.
if (delta < 0 || delta > CONST_MAX_JITTER_MS) {
// calc the right diff by audio sample rate
if (msg->header.is_audio() && sample_rate > 0) {
delta = (int32_t)(delta * 1000.0 / sample_rate);
} else if (msg->header.is_video() && frame_rate > 0) {
delta = (int32_t)(delta * 1.0 / frame_rate);
} else {
delta = DEFAULT_FRAME_TIME_MS;
}
// sometimes, the time is absolute time, so correct it again.
if (delta < 0 || delta > CONST_MAX_JITTER_MS) {
delta = DEFAULT_FRAME_TIME_MS;
}
srs_info("jitter detected, last_pts=%d, pts=%d, diff=%d, last_time=%d, time=%d, diff=%d",
last_pkt_time, time, time - last_pkt_time, last_pkt_correct_time, last_pkt_correct_time + delta, delta);
} else {
srs_verbose("timestamp no jitter. time=%d, last_pkt=%d, correct_to=%d",
time, last_pkt_time, last_pkt_correct_time + delta);
}
last_pkt_correct_time = srs_max(0, last_pkt_correct_time + delta);
msg->header.timestamp = last_pkt_correct_time;
last_pkt_time = time;
return ret;
}
int SrsServer::do_cycle()
{
int ret = ERROR_SUCCESS;
// find the max loop
int max = srs_max(0, SRS_SYS_TIME_RESOLUTION_MS_TIMES);
max = srs_max(max, SRS_SYS_RUSAGE_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_CPU_STAT_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_DISK_STAT_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_MEMINFO_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES);
max = srs_max(max, SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES);
// the deamon thread, update the time cache
while (true) {
// the interval in config.
int heartbeat_max_resolution = (int)(_srs_config->get_heartbeat_interval() / 100);
// dynamic fetch the max.
int __max = max;
__max = srs_max(__max, heartbeat_max_resolution);
for (int i = 0; i < __max; i++) {
st_usleep(SRS_SYS_CYCLE_INTERVAL * 1000);
// for gperf heap checker,
// @see: research/gperftools/heap-checker/heap_checker.cc
// if user interrupt the program, exit to check mem leak.
// but, if gperf, use reload to ensure main return normally,
// because directly exit will cause core-dump.
#ifdef SRS_AUTO_GPERF_MC
if (signal_gmc_stop) {
srs_warn("gmc got singal to stop server.");
return ret;
}
#endif
if (signal_reload) {
signal_reload = false;
srs_info("get signal reload, to reload the config.");
if ((ret = _srs_config->reload()) != ERROR_SUCCESS) {
srs_error("reload config failed. ret=%d", ret);
return ret;
}
srs_trace("reload config success.");
}
// update the cache time or rusage.
if ((i % SRS_SYS_TIME_RESOLUTION_MS_TIMES) == 0) {
srs_info("update current time cache.");
srs_update_system_time_ms();
}
if ((i % SRS_SYS_RUSAGE_RESOLUTION_TIMES) == 0) {
srs_info("update resource info, rss.");
srs_update_system_rusage();
}
if ((i % SRS_SYS_CPU_STAT_RESOLUTION_TIMES) == 0) {
srs_info("update cpu info, cpu usage.");
srs_update_proc_stat();
}
if ((i % SRS_SYS_DISK_STAT_RESOLUTION_TIMES) == 0) {
srs_info("update disk info, disk iops.");
srs_update_disk_stat();
}
if ((i % SRS_SYS_MEMINFO_RESOLUTION_TIMES) == 0) {
srs_info("update memory info, usage/free.");
srs_update_meminfo();
}
if ((i % SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES) == 0) {
srs_info("update platform info, uptime/load.");
srs_update_platform_info();
}
if ((i % SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES) == 0) {
srs_info("update network devices info.");
srs_update_network_devices();
}
if ((i % SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES) == 0) {
srs_info("update network rtmp server info.");
resample_kbps(NULL);
srs_update_rtmp_server((int)conns.size(), kbps);
}
#ifdef SRS_AUTO_HTTP_PARSER
if (_srs_config->get_heartbeat_enabled()) {
if ((i % heartbeat_max_resolution) == 0) {
srs_info("do http heartbeat, for internal server to report.");
http_heartbeat->heartbeat();
}
}
#endif
srs_info("server main thread loop");
}
}
return ret;
}
