This is a static archive of our old Q&A Site. Please post any new questions and answers at ask.wireshark.org.

Cannot capture network latency of HTTP request.

0

Hi,

I'm trying to capture the latency of a simple HTTP request over the network (internet). I've tried delta, delta conversion, relative time etc. ... Nothing seems to give me the RTT (round trip time) over the network.

I used a simple HTTP request with screenshot of Google chrome with debugger. See alt text

Also see screenshot of Wireshark capture alt text

Thanks, Kapil

asked 22 Jan '14, 01:49

kapilok's gravatar image

kapilok
11●2●2●5
accept rate: 0%

One Answer:

2

One way of doing that would be

  1. Find the GET request (as you did)
  2. Right click the packet and select "Set Time Reference". This will mark the GET request as new "zero" time
  3. look at the HTTP decode. In recent versions of Wireshark it should have a blue line saying something like "Response in frame: xyz". Click on it to jump to the answer packet.
  4. Set your time column to "Seconds since beginning of capture" in the View menu (also often called "Relative Time"). This way the time column will show the time since the start of the file, or the nearest Time Reference point
  5. Read the latency from the time column

answered 22 Jan '14, 03:06

Jasper's gravatar image

Jasper ♦♦
23.8k●5●51●284
accept rate: 18%

edited 22 Jan '14, 06:17