Add more Rome models (#434)

* Add more Rome models

* Update models and tuning

* Update tuning

[ROCm/rccl commit: 2249a1d9d3]

projects/rccl/tools/topo_expl/topo_expl.cpp

@@ -128,6 +128,11 @@ NodeModelDesc model_descs[] = {
   {1, "topo_16p1h.xml",         "single node 16P1H"},
   {4, "topo_8p_rome_4n_2.xml",  "4 nodes 8 gfx908 Rome 4 NICs NPS=4 Alt. Model"},
   {1, "topo_8p_90a_1.xml",      "single node gfx90a Alt. Model"},
+  {4, "topo_16p1h.xml",         "4 nodes 16P1H"},
+  {4, "topo_3p_pcie.xml",       "4 nodes 3P"},
+  {4, "topo_3p_pcie_1.xml",     "4 nodes 3P Alt. Model"},
+  {1, "topo_8p_4nics.xml",      "single nodes 8P 4 NICs"},
+  {4, "topo_8p_4nics.xml",      "4 nodes 8P 4 NICs"},
 };
 
 int main(int argc,char* argv[])