[Live-devel] optimising openRTSP

Ross Finlayson finlayson at live555.com
Wed Oct 29 05:56:38 PDT 2008

>I have profiled my system and found that around 8.7 % time is being 
>spend in Reordering Packet Buffer <<OpenRTSP_profiling.log>>
>VMA      samples   %time   App-name      Symbol-name
>00465778 35862     8.7658  openRTSP 
>And around 3.4 % time is being spend in
>00463ac8 13521     3.3049  openRTSP 
>seqNumLT(unsigned short, unsigned short)
>I am attaching entire oprofilelog for openRTSP log kindly help me 
>with some suggestion to dig out the problem

I don't see a problem here.

It sounds like you just have high-bandwidth streams:

>PS. These logs captured while recording 16 mjpeg streams (each with 
>20 FPS and 32KB framesize)

That's almost 82 Mbps.  Are you sure you have sufficient network 
capacity for this (i.e., you don't just have 100 Mbps Ethernet, which 
would not be sufficient)?

If your problem is packet loss (but you have sufficient network 
capacity), then you need to increase your OS's buffer size for 
incoming network packets.  See 

Ross Finlayson
Live Networks, Inc.
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