Packet Split and Merge Connections - 2023.1 English

Multiple streams can share routing by connecting pktmerge to pktsplit. When buffers are transferred via pktmerge connected to pktsplit, each pktmerge.in[i] is routed to the corresponding pktsplit.out[i]. The in-degree of pktmerge should be equal to the out-degree of pktsplit. An example graph code is as follows:

for (int i=0; i<WAYS; i++) {
  connect<>(plioIn[i].out[0], kOut[i].in[0]);
  connect<>(kOut[i].out[0], merge.in[i]);
  connect<>(split.out[i], kIn[i].in[0]);
  connect<>(kIn[i].out[0], plioOut[i].in[0]);
}
connect<> (merge.out[0], split.in[0]);

The graph view is shown in the following figure.

When streams pass through pktmerge to pktsplit, broadcast is supported from pktsplit. In this situation, pktmerge.in[i] is broadcast to the corresponding multiple destinations that connect to pktsplit.out[i]. Following is an example code, where merge.in[WAYS-1] is broadcast to split.out[WAYS-1] and split.out[WAYS]:

for (int i=0; i<WAYS; i++) {
  connect<>(plioIn[i].out[0], kOut[i].in[0]);
  connect<>(kOut[i].out[0], merge.in[i]);
  connect<>(split.out[i], kIn[i].in[0]);
  connect<>(kIn[i].out[0], plioOut[i].in[0]);
}
connect<>(split.out[WAYS-1], kIn[WAYS].in[0]);
connect<>(kIn[WAYS].out[0],plioOut[WAYS].in[0]);
connect<> (merge.out[0], split.in[0]);