[Question]About RoB-less solution

[L3CT0RLI]

Hi, it is mentioned in the paper that transactions with the same TxnID and different dstID would be stalled, so where is the stalled resp kept and how could the unstalled resp still enter the correct datapath? Thanks!

[fischeti]

This is handled in the floo_rob_wrapper, with AXI ID counters. I am not sure what you mean about stalled responses. The responses are never stalled, but the requests are. Essentially, you don't inject a request into the network unless you can guarantee that the response can be handled. For the RoB-less variant this is done by counting the number of oustanding transactions of a certain txnID to destinations.