Merge branch 'dev' into rdma

wangzhengquan

2021-01-14 124011574583b980c1794a1de4e61b39f73f1f11

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ipcrm -a
 
./dgram_mod_req_rep server 2 & node0=$! && sleep 1
./dgram_mod_req_rep client 2 node1
kill $node0