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Feature #3478

closed

Bandwidth breakdown and UI update

Added by Jeff Burke about 8 years ago. Updated about 8 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Peter Gusev
Category:
-
Start date:
02/28/2016
Due date:
% Done:

0%

Estimated time:

Description

Significantly higher bandwidth than expected has been observed for streams. Please documented what to expect for a given stream (in both directions), and breakdown in percentages with its major contributions from components like packet overhead, etc. Also, you may wish to change the menu options to reflect both the media bitrate and the estimated total network traffic so people know what to expect.

Files

a.pcapng.gz (2.34 MB) a.pcapng.gz audio stream captured by wireshark Peter Gusev, 02/29/2016 02:26 PM
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 #1

Updated by Peter Gusev about 8 years ago

  • Status changed from New to In Progress
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 #2

Updated by Peter Gusev about 8 years ago

Stream bandwidths

I ran some tests with Wireshark and OSX activity monitor. In general, OSX activity monitor isn't accurate enough and varies greatly. Here are the results:

Audio:

OSX:

  • in: ~32KB/s (+/- 10 KB/s) = 256 Kbps
  • out: ~8KB/s (+/- 4 KB/s)= 64 Kbps

Wireshark (ndn traffic only):

  • in: 206 Kbps
  • out: 31 Kbps

NDN-RTC statistics:

  • i-rate (interest rate): 25
  • d-rate (data segment rate): 25
  • raw incoming data rate: 213 Kbps

Video (1000 Kbps video stream as configured in ndncon, 1280x720 resolution):

OSX:

  • in: ~200KB/s (+/- 60 KB/s) = 1600 Kbps
  • out: ~32KB/s (+/- 10 KB/s)= 64 Kbps

Wireshark (ndn traffic only):

  • in: 1462 Kbps
  • out: 232 Kbps

NDN-RTC statistics:

  • i-rate (interest rate): 192
  • d-rate (data segment rate): 150
  • raw incoming data rate: 1527 Kbps

Packet anatomy

I took one sample Interest and one sample Data packet from the streams (see wireshark pcaps attached) and analyzed them for protocol headers.

Audio

Interest

  • Eth2: 151 bytes
  • NDN: 109 bytes (-42 Eth2+IP+UDP headers)

Data:

  • Eth2: 1111 bytes
  • NDN: 1069 bytes (-42 Eth2+IP+UDP headers)
  • Payload: 723 bytes (2 audio samples + meta) => 346 bytes or 47.8% NDN overhead

Video

Interest

  • Eth2: 156 bytes
  • NDN: 114 bytes (-42 Eth2+IP+UDP headers)

Data:

  • Eth2: 1410 bytes
  • NDN: 1368 bytes (-42 Eth2+IP+UDP headers)
  • Payload: 1000 bytes (video segment + meta) => 368 bytes or 36.8% NDN overhead
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 #3

Updated by Jeff Burke about 8 years ago

Peter, did bandwidth usage in the March 2 test (#3485) perform as expected?

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 #4

Updated by Peter Gusev about 8 years ago

We didn't have means to measure it on client sides. This will be available with #3510

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 #5

Updated by Jeff Burke about 8 years ago

Ok, so we are tracking this now, right? (Can we close this issue?)

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 #6

Updated by Peter Gusev about 8 years ago

  • Status changed from In Progress to Closed

Yes. Closing it.

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