rohc team mailing list archive

[Manuel Iglesias <Manuel.Iglesias@xxxxxxxxxxxx>]

Hi Didier,

Thank you for your response,

I have update the master branch on git, not sure if that holds the last version, please let me know how to determine the exact version.

I have no tried to reproduce the issue on another set of machines, what do you think it may be underlying so the Host machine be the cause of this bug?

The pcap file is little more than 1M, I am attaching it, let me know if you can received it.

The issue happens only one during the 5 or 6 pcap captures I do, after that seems to be ok , I was trying to create a sipp scenario that continuously send the pcap over and over to see if it happens again, 
but didn't know how to specify the loop on sipp xml file.

Please let me know your thoughts,

Appreciated!

Manuel Iglesias




________________________________________
From: Rohc [rohc-bounces+manuel.iglesias=plcpower.com@xxxxxxxxxxxxxxxxxxx] on behalf of Didier Barvaux [didier@xxxxxxxxxxx]
Sent: Monday, June 26, 2017 2:11 PM
To: rohc@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Rohc] rohc compressor and decompressor latency issue

Hello,

>I would like to know your thoughts about an issue I am having,
>
>Every time I started a rohc decompressor instance, after exactly 1246
>RTP packets (G.711a) received, the decompressor does the job but with
>huge latency, around 170 ms, after that it seems to work correctly but
>I cannot be totally sure since I haven't let it long time receiving
>compressed packets.
>The exact number of packet at where it fails make me think of some bug.

Yes, it looks strange to me too.

>I have a couple of logs, one in which I start sending the RTP packets
>for more than 45 seconds, in that test at packet #1246 it shows the
>latency in wireshark, but I also have a ms counter in code that confirm
>the latency during decompressor function call.
>The second test I send packets for 10 seconds at a time, during them I
>never restart decompressor but compressor get restarted by calling
>force_contexts_reinit(), this test show same result of latency at
>packet #1246.

OK, good to know.

>I know the RTP stream is Ok since I have inspected under wireshark. I
>know the decompressor get packets on time and produce a latency after
>inspecting receiving end tcpdump capture (see attached image please)
>
>This is a extract of the log that rohc decompressor shows at packet of
>latency.

The log looks fine.

What library version do you use?

Did try to you reproduce the problem on another machine?

How large is the PCAP capture? If you find a way to send it to me, I may try to reproduce the problem on my system.

Regards,
Didier


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Attachment: g711a.pcap
Description: g711a.pcap