[Winpcap-users] Packets capture latency

[Gianluca Varenni]

What is the original delay between the packets?

Are you looking at the timestamps with wireshark?

Have a nice day
GV

--------------------------------------------------
From: "Alimjan Kuramshin" <alimjankuramshin at gmail.com>
Sent: Wednesday, March 17, 2010 9:58 AM
To: <winpcap-users at winpcap.org>
Subject: [Winpcap-users] Packets capture latency

> Hello, everyone! My name is Alimjan and i'm developing custom board with 
> the ethernet device and i've got some problem
> with capturing data from it ..
>
> I'm using Notebook Asus G1S with Windows XP + SP3 installed to connect to 
> my board. Using WinPcap(4.1.1), i'm capture data from the board. So, i've 
> found that delay between the captured packets is a very 'vary' i mean that 
> it has huge spread, e.g,
> at 10 mbits/s i've got 45-70 us delay, it is normal i gues, but some times 
> this delay grow up to 3-7 ms (milliseconds), for example, distance between 
> packets: 45 us, 46 us, 50 us, 47 us and so on.. then
> 4 ms, 7 ms, 1 ms, and then again 53 us, 47 us and so on, the repeat... 
> Number of 'normal' delay is also very 'vary', delay may appear in a 
> different numbers of received packets, no logic :(
>
> My laptop is directly connected to my board e.g. cross TX->RX, RX->TX, no 
> hubs or something. Also using oscilloscope connected to the  TX+ and TX- 
> lines i've found that it is no delay between packet that my custom board 
> (device) have send.  Anybody please, help me to solve this situation,
> may be i'm doing something wrong?
>
> P.S. i'm using winpcap exapmle code to capture the packets with callback 
> method and within pcap_next_ex.
>
> P.P.S i'm sorry for my english spelling skill, i hope that you can 
> understand my.
>
> Many thanks, bye..
>
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