Increased maximum number of XML nodes to support CPX mode. (#1386)

src/graph/topo.h

@@ -200,8 +200,8 @@ ncclResult_t ncclTopoPrintPaths(struct ncclTopoSystem* system);
 ncclResult_t ncclTopoLoadSystem(const char* xmlTopoFile, struct ncclTopoSystem* system);
 ncclResult_t ncclTopoGetIntermediateRank(struct ncclTopoSystem* system, int rank, int64_t netId, int* intermediateRank);
 
-#define NCCL_TOPO_XML_MAX_NODES 256
-#define NCCL_GRAPH_XML_MAX_NODES 4096
+#define NCCL_TOPO_XML_MAX_NODES 8192
+#define NCCL_GRAPH_XML_MAX_NODES 8192
 ncclResult_t ncclTopoGetSystemFromXml(struct ncclXml* xml, struct ncclTopoSystem** topoSystem, uint64_t localHostHash);
 ncclResult_t ncclTopoGetGraphFromXml(struct ncclXmlNode *xmlGraphs, struct ncclTopoSystem* system, struct ncclTopoGraph* graph, int* nChannels);
 ncclResult_t ncclTopoGetXmlFromGraphs(int ngraphs, struct ncclTopoGraph** graphs, struct ncclTopoSystem* system, struct ncclXml *xml);