Hi Carsten,
>On 07/29/2011 09:58 AM, Michael Raab wrote:
>> we're trying to install our OpenSG based application in a CAVE of a
>> customer.
>> The first test configuration looks like this:
>> - 1 windows PC running the client app
>> - 8 linux (red hat) machines each running one render server
>>
>> If we start the setup using StreamSock it runs but not very fast.
>> If we use multicast, the systems starts but freezes after a short time.
>>
>> Do you have any ideas what may cause this deadlock situation in case of
>> multicast communication?
>
>no, I'm afraid not, at least not without knowing where it gets stuck,
>e.g. does the client side get stuck waiting for servers to acknowledge
>receiving data?
>Since you say this is for a CAVE I assume you use MultiDisplayWindow not
>one of the more complicated windows for distributed rendering?
>Just to be sure, have you verified your network/switch is set up to
>support multicast?
>
Finaly we can send you some more informations.
It seems, that the client freezes during waiting for the servers.
This may happen, because we get a Fatal error on one of the linux servers.
The error line is:
"FATAL: Error in dgram reader thread:SocketLib: recvFrom() 14 Bad
address"
The server is started with the following code (snippets):
connectionType = "Multicast";
address = "";
code:
-----------------------------------------------------------------------------------
// setup the OpenSG Glut window
window = GLUTWindow::create();
window->setId(winid);
window->init();
// create the cluster server
server = new
ClusterServer(window,name,connectionType,address);
// start the server
server->start();
// enter glut main loop
glutMainLoop();
------------------------------------------------------------------------------------------
display function is:
code:
-----------------------------------------------------------------------------------------
// receive scenegraph and do rendering
server->render(ract);
// clear changelist
OSG::Thread::getCurrentChangeList()->clearAll();
------------------------------------------------------------------------------------------
Best regards,
Hanno Hugenberg
--
Dipl.-Inf. Hanno Hugenberg
Fraunhofer Institut für Fabrikbetrieb und -automatisierung IFF
Geschäftsfeld Virtuell Interaktives Training
Sandtorstr. 22, 39106 Magdeburg, Germany
Telefon +49 (0) 391 40 90-710
mailto:hanno.hugenb...@iff.fraunhofer.de
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