nccl-tests did not perform as expected

[yalbaba]

My test environment is two nodes, each node is equipped with eight Gpus respectively, and the gpu model is A800-SXM4-80GB, as shown in the following figure：
node1

node2

The results of the ib_write_bw test for both nodes are as follows:

The results of nccl-tests on the two nodes are as follows：

[yalbaba]

This is the node topology：

[sjeaugey]

Can you share the topology dump (run with NCCL_TOPO_DUMP_FILE=system.txt and share the system.txt file here)?

[yalbaba]

Can you share the topology dump (run with NCCL_TOPO_DUMP_FILE=system.txt and share the system.txt file here)?

I have solved this problem because nv_peer_memory is not open,thanks!