<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi,</div><div><br></div><div>For my application, I made some changes in switch_rtp to use poll to read from network instead of synchronising on timer,</div><div><br></div><div><span>switch_rtp_clear_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER);</span><br></div><div><span><br></span></div><div>I observed a weird behaviour with regarding to switch_poll, it blocks with 20ms always even the timer value is 10 ms when there are no packet received on network.</div><div><br></div><div><span><div>+ pt = 10 * 1000; // 10ms</div><div>+ switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(rtp_session->session), SWITCH_LOG_DEBUG, "+poll reading:%d\n", pt);</div><div> }</div><div> </div><div> poll_status = switch_poll(rtp_session->read_pollfd, 1, &fdr, pt);</div><div>+ switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(rtp_session->session), SWITCH_LOG_DEBUG, "-poll reading:%d:%d\n", pt, poll_status);</div><div><br></div><div>The following is from the log,</div><div><br></div><div><span><div>0c19d3aa-429e-11e8-bbd0-fb8396b8383d 2018-04-17 20:21:31.453604 [DEBUG] [23807] switch_rtp.c:7001 +poll reading:10000</div><div>0c19d3aa-429e-11e8-bbd0-fb8396b8383d 2018-04-17 20:21:31.473649 [DEBUG] [23807] switch_rtp.c:7005 -poll reading:10000:2</div></span><br></div></span></div><div>Any idea? This is really weird, I expect switch_poll works as select.</div><div><br></div><div>Many thanks for help.</div><div><br></div><div>/Kaiduan</div></div></body></html>