Hi!
This is my vSphere 5.5 configurations.
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esxcli system module parameters set -m=ib_ipoib -p="ipoib_recvq_size=1024 ipoib_sendq_size=1024 ipoib_mac_type=0"
esxcli system module parameters set -m=mlx4_core -p="mtu_4k=1 msi_x=1"
esxcli system module parameters set -m=ib_srp -p="dead_state_time=5 max_vmhbas=1 srp_can_queue=1024 srp_cmd_per_lun=64 srp_sg_tablesize=32"
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Can you try it?