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davidepatti / noxim

Network on Chip Simulator
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communication Tile-Hub-Tile #81

Closed dtesch closed 5 years ago

dtesch commented 5 years ago

Dear Davide,

Has the communication Tile-Hub-Tile, between two Tiles connected to the same Hub, been implemented?

In the Noxim paper, you say that yes, however looking at the source code I did not see it implemented.

Thank you.

davidepatti commented 5 years ago

The Tile-Hub-Tile communication you need is already implemented as hardware connections (port mapping etc...) , but requires some specific routing strategy to support it. That is, you can send a packet from A to B where both are connected to a radio-hub R, but the current default routing logic is to use radiohub only when A and B nodes are connected to different hubs and you want to use wireless transmission. To implement what you are talking about, I think you should add some logic in Router.cpp, where the direction is computed (vector < int > Router::routingFunction(const RouteData & route_data), in order to capture this situation where you are sending to some node which is connected to the SAME radio-hub. To handle this case, I think you need the definition of a new output direction, something like: DIRECTION_HUB_TO_LOCAL,so that the radio hub can differentiate this kind of incoming packets from the usual ones coming as result of DIRECTION_HUB.

dtesch commented 5 years ago

Got it!

Thank you very much