[Winpcap-users] WinPCAP packets capture delay..

Gianluca Varenni gianluca.varenni at cacetech.com
Fri Oct 1 15:00:12 PDT 2010

I finally had time to look at the trace files too.

The maximum  packet interarrival is 934microseconds in one capture, and all the other captures show a max interarrival less than 500microseconds. This is normal. You were talking about milliseconds delay. 

Am I missing anything here?

Have a nice day

From: "Fish" (David B. Trout) 
Sent: Thursday, September 23, 2010 2:12 PM
To: winpcap-users at winpcap.org 
Subject: Re: [Winpcap-users] WinPCAP packets capture delay..

So where's the problem?!


I looked at your new files (100mbit_130byte.pcap, 100mbit_60byte.pcap, ... etc) but did not see a single packet with more than 500us delay (0.5ms) from the previous packet. Most packets were 0-1us delay, which is extremely good!


So where's the problem?


I don't see a problem!


The original file you sent, yes, it showed the problem.


But these new set of capture files you sent don't have any problem with them that I could see!


Or am I going blind?

  "Fish"  (David B. Trout) 
    fish at softdevlabs.com


From: winpcap-users-bounces at winpcap.org [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Alimjan Kuramshin
Sent: Thursday, September 23, 2010 8:26 AM
To: winpcap-users at winpcap.org
Subject: Re: [Winpcap-users] WinPCAP packets capture delay..
Importance: High



Hello, David! Thanks for Your test and attention.

Okay, I have done some of my own testing with 10,000 packets I am not seeing
any delay at all.

Without 100,000 packets however, I am seeing some periodic delays.


My test is not good. It is not the same test as yours.

I do not have an oscilloscope so I cannot know if the packets are being SENT
without delay. I suspect they are.

I suspect the delay I am seeing with my test is from the SENDING machine,
not on the receiving/capturing machine.

So my test in inconclusive. It proves nothing.

Alimjan, are you absolutely certain there is no delay sending? Does your
oscilloscope have a "record" feature? Can you review your oscilloscope
recording to verify there are zero delays? It is important!

In other words, do you have ABSOLUTE *PROOF* that the packets are being SENT
without delay?


          I've done some test, and here is the results http://www.filefactory.com/file/b39ec4g/n/alimjan_kuramshin_winpcap_test.zip

Can You look at them? May be You can find some thing. Thank You a lot. You are so kind!







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