[aravis] Re: Dropped packets on dual link GigE camera
- From: <tom.cobb@xxxxxxxxxxxxx>
- To: <aravis@xxxxxxxxxxxxx>
- Date: Thu, 16 Aug 2012 10:07:29 +0000
> The NIC was showing low 10's of rx errors per day so we replaced it -
> all problems were solved.
Is that errors that show up in ifconfig? If so then mine looks OK. I put some
printf's in arv_gv_stream_thread and I've commented on what I think is
happening below:
Frame_id: 700, Packet id: 0
[GvStream::_find_frame_data] Start frame 700
Frame_id: 700, Packet id: 1
Frame_id: 700, Packet id: 3
[GvStream::_missing_packet_check] Resend request at dt = 249, packet id = 3/16
[GvStream::send_packet_request] frame_id = 700 (2 - 2)
*** Camera sends packet 2 and 3 on different links, server delivers 3 before 2
so aravis requests resend of 2
Frame_id: 700, Packet id: 2
[GvStream::_process_data_block] Received resent packet 2 for frame 700
*** Server gets original packet 2, thinks it's the resent packet 2
Frame_id: 699, Packet id: 12
[GvStream::_find_frame_data] Discard late frame 699 (last: 700)
Frame_id: 700, Packet id: 4
Frame_id: 700, Packet id: 5
Frame_id: 700, Packet id: 2
[GvStream::_process_data_block] Received resent packet 2 for frame 700
*** Now server receives the resent packet 2, I assume this doesn't cause any
issues?
Frame_id: 700, Packet id: 6
Frame_id: 700, Packet id: 7
Frame_id: 700, Packet id: 9
[GvStream::_missing_packet_check] Resend request at dt = 1008, packet id = 9/16
[GvStream::send_packet_request] frame_id = 700 (8 - 8)
Frame_id: 700, Packet id: 8
[GvStream::_process_data_block] Received resent packet 8 for frame 700
*** Same thing happens with packets 8 and 9
Frame_id: 700, Packet id: 10
Frame_id: 700, Packet id: 11
Frame_id: 700, Packet id: 8
[GvStream::_process_data_block] Received resent packet 8 for frame 700
Frame_id: 700, Packet id: 12
Frame_id: 700, Packet id: 14
[GvStream::_missing_packet_check] Resend request at dt = 1496, packet id = 14/16
[GvStream::send_packet_request] frame_id = 700 (13 - 13)
Frame_id: 700, Packet id: 15
Frame_id: 701, Packet id: 0
[GvStream::_find_frame_data] Start frame 701
Frame_id: 700, Packet id: 13
*** Same thing happens with packets 13 and 14
[GvStream::_process_data_block] Received resent packet 13 for frame 700
[GvStream::_check_frame_completion] Completed frame 700
[GvStream::_close_frame] Close frame 700
Frame_id: 701, Packet id: 1
Frame_id: 700, Packet id: 13
[GvStream::_find_frame_data] Discard late frame 700 (last: 701)
*** Resent packet 13 discarded
I'll try a simple packet reordering filter and see if that helps...
Thanks,
Tom
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