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[Xen-users] About 10GE performane on domU (with xen3.4.4)

Hi all,


I have two Dell R720xd servers dom0 running with Centos 5.8 (with xen 3.4.4) installed with Intel 10GE (ixgbe driver) interface. I test TCP transfer rate between dom0, speed is 7.x Gbps (with Netperf tool).  However, I try similar test between two domU, speed drop to 1.x Gbps.


domU is running with Centos5.8 (64bit) para-virtualized (yum updated to latest packages).


Test 1:  dom0 -> dom0 , speed 7.x Gbps

Test 2:  domU -> dom0 , speed 7.xGbps

Test 3:  dom0-> domU , speed 1.x Gbps

Test 4:  domU -> domU ,speed 1.x Gbps


Above tests are carried between two physical machines. From above 4 tests, seems bottleneck on domU RX speed.


I suspect related to xen network driver issue on domU. Anyone know any optimization can be done on domU?


Thanks a lot.


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