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Re: WiTap Network Delay
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Re: WiTap Network Delay


  • Subject: Re: WiTap Network Delay
  • From: "Quinn \"The Eskimo!\"" <email@hidden>
  • Date: Mon, 11 Oct 2010 22:37:17 +0100

On 11 Oct 2010, at 22:14, Gordon Apple wrote:

> Here's what's happening now.  I set up my Mac as the WiFi server, and
> experienced the same random long delays using WiTap between iPhone and iPad.
> I then ran WiTap in the Xcode simulator, connected by WiFi to the iPad -- no
> delays.  There must be something else needed in the WiTap example to get
> these short messages flushed through the router buffers.  Any ideas?

That's not really how TCP works.  Segments might get delayed a few milliseconds (depending on the current round trip time estimate), but a delay of minutes is not caused by TCP flow control problems.  My guess is that you're actually have connection problems.  It could be, for example, that the client is trying to connect to the server via IPv6, and that takes a few minutes to fail, after which it retries with IPv4 and succeeds.  Or vice versa (-:  A packet trace will reveal all.

S+E
--
Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware


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 >Re: WiTap Network Delay (From: Gordon Apple <email@hidden>)

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