QNetworkManager periodically stops the tcp communication

[purcola]

I am creating a program with two different flows of data: one tcp wireless connection receiving about 24 kB/s, with a home made socket interface implementation, and eventually some http requests (also wireless), with the QNetworkManager class.
I realized that it works like a charm if I only have the tcp connection. But, as soon as I instantiate the network manager class, then every 10 seconds the tcp communication is interrupted for 1 second. This happens even if I don't create any http request. See the picture of a capture of the network using wireshark to see the behaviour. Is there anything in this class that periodically causes this effect?

[purcola]

Looks like there is a internal slot in the QNetworkAccessManager that blocks the network access every 10 seconds.
I have tried moving the class to another thread and it works as expected.

 QNetworkAccessManager qnam;
 QThread thread;
 qnam.moveToThread(&thread);
 thread.start();

[jsulm]

@purcola I you sure it's not something in your app? I don't think there is anything in QNetworkManager periodically stopping network communication.

[purcola]

Could be. But I have tried with different applications and the behaviour is the same.
I did a test in a UDP streaming application over the very same wireless network. The only line I added to the code is the following:

QNetworkAccessManager manager;

The results are the same: Every 10 seconds there is something going on in the network.
and

Any clues?

[purcola]

Looks like there is a internal slot in the QNetworkAccessManager that blocks the network access every 10 seconds.
I have tried moving the class to another thread and it works as expected.

 QNetworkAccessManager qnam;
 QThread thread;
 qnam.moveToThread(&thread);
 thread.start();