[Interest] Not quite a Qt question.. Buffers in QAbstractSocket

[BRM]

> From: "wargand at gmx.de" <wargand at gmx.de>

>I have a question, which might not be directly Qt related.
>I am writing an application, which streams a move to my TV.
>The connection is initiated from the TV via TCP/IP. QTcpSocket
>is used. For certain reasons I send my data in packages even
>though it is TCP and not UDP. But since packages are sent
>continuously it is a constant data stream. So far, so good.
>
>My programm runs under Linux and OS X. And now it gets
>strange and I might miss something important. Under
>Linux I set the package size to 4k. The programm runs
>rock stable. Exactly the same code under OS X causes
>the TV to disconnect after a few seconds. When I reduce
>the package size under OS X to 2k the program again
>runs fine with no problems at all.

[snip]
>Anyone an idea what the problem could be? Unfortunately I
>cannot get any feedback from the TV. Something related to
>different network cards perhaps?


Sounds like a difference in the OS's TCP configuration.

Even if Qt's internal buffering is unlimited, the OS buffering still matters and can change from machine to machine, even under the same OS.

$0.02

Ben