Add another Rome model (#249)

* Add another Rome model

* Add gfx908 4P3L models and support

* Revert "Use cached value for detecting GDR support only once"

This reverts commit 0108a1219d.

* Skip using ibverb for GPU direct RDMA detection

* Fine tune one Rome model

[ROCm/rccl commit: a51e4071e3]

projects/rccl/tools/topo_expl/topo_expl.cpp

@@ -90,11 +90,15 @@ NodeModelDesc model_descs[] = {
   {4, "topo_8p6l_4nic.xml",     "4 nodes gfx908 8P6L 4 NICs"},
   {4, "topo_8p6l_5nic.xml",     "4 nodes gfx908 8P6L 5 NICs"},
   {4, "topo_8p6l_6nic.xml",     "4 nodes gfx908 8P6L 6 NICs"},
-  {1, "topo_8p_rome_n2.xml",    "singel node 8 VEGA20 Rome NPS=2"},
+  {1, "topo_8p_rome_n2.xml",    "single node 8 VEGA20 Rome NPS=2"},
   {4, "topo_8p_rome_n2.xml",    "4 nodes 8 VEGA20 Rome NPS=2"},
   {4, "topo_8p_rome_n2_1.xml",  "4 nodes 8 VEGA20 Rome NPS=2 Alt. Model"},
-  {1, "topo_8p_ts1.xml",        "Single node 6 VEGA20 TS1"},
+  {1, "topo_8p_ts1.xml",        "single node 8 VEGA20 TS1"},
   {4, "topo_8p_ts1.xml",        "4 nodes 8 VEGA20 TS1"},
+  {1, "topo_8p_ts1_1.xml",      "single node 8 VEGA20 TS1 Alt. Model"},
+  {4, "topo_8p_ts1_1.xml",      "4 nodes 8 VEGA20 TS1 Alt. Model"},
+  {1, "topo_4p3l_2h.xml",       "single node 8 gfx908 Rome"},
+  {4, "topo_4p3l_2h.xml",       "4 nodes 8 gfx908 Rome"},
 };
 
 int main(int argc,char* argv[])