FabricEval exports

At the end of a FabricEval run, we would find a new folder generated under the top level project folder. The folder name is set to FLAG.GR_ALGO. So if we are evaluating IGR, the folder will be called igr/.

In the generated folder, there will be a few files:

• topo.textproto: protobuf file of the network topology generated by topogen. If FabricEval is set to load a pre-generated topology, there will be no topo.textproto generated.
• TM.textproto: protobuf file of the traffic demands generated by tmgen. If FabricEval is set to load a pre-generated demand matrix, there will be no TM.textproto generated.
• te_sol.textproto: protobuf file of the TE solution generated by GlobalTE. If FabricEval is set to load a pre-generated TE solution, there will be no te_sol.textproto generated.
• LU.csv: csv file containing a dump of all links’ utilization, both ideal and actual.
• node_demand.csv: csv file containing a dump of the admitted and total demand on each switch.
• node_ecmp.csv: csv file containing a dump of the number of groups and switch table utilization on each switch.
• path_diversity.csv: csv file containing a dump of the number of unique paths/ports in each group before and after group reduction (if pruned), as well as the traffic volume impacted due to pruning.
• reduced_groups.csv: csv file containing a dump of all reduced groups on all switches.

All the essential information about the network utilization is stored along with the Topology class in topology/topology.py. Users can expose more information and export it to files by modifying the class.