[vistavrtoolkit-general] Problem with VistaMsgChannel - performing to slow

[<Mat...@dl...>]

Hi all,

I encountered a Problem regarding the TCP connection.

I am using Vista 1.12.0 from the tag.

My intention is to create a master/slave setup where the Master is sending data to the slave via TCP.

The Master is establishing a TCP connection using the "VistaConnectionIP" and using a "VistaMessageChannel" with this connection to transfer the data to the slave.
The Data is written in a "VistaPropertyList" and transfered using the "WriteMsg (int iMethodToken, const VistaPropertyList &rList,VistaPropertyList &rAnswer)" method.
The order to send the Data is triggered by an InteractionEvent on the Master's input devices (60+ events/second).

The Slave on the other hand is using the MSGPORT to enable the master to connect to him. The messages ( VistaCommandEvent's) are parsed by a Class the is derived from the "VistaEventHandler".

The communication struct is based on the VistaDemo 17 (Alice, Bob).


The problem:

The master is blocked by the "WriteMsg" method. Without this messaging the master uses to have ~160 frames per second, but when the Messaging is enabled this is reduced to 10 for 1 slave, 5 for 2 slaves and 3.3 for 3 slaves. Therefore the Slaves also receive the reduced amount of events.

I have already tried the following things:

- Disable the blocking of the connection:
This has lead to the slaves getting only 5 Events and then releasing the port, so that the connection collapsed. The master went back to ~160 frames/second, but the slave did not receive any more messages.

- Disabled setting the answer of the slave
Did not chance anything.


Have you any suggestions to avoid this performance loss?

Thanks for your help.

Best regards
Matthias