Hi,
Thanks your info. I have read this doc and tried some of the optimization on it, but not much significant improvement. About “SR-IOV” , I am not sure how to enable it as this doc is for Xen 4 while I am using xen3.4.4 (there is no “xe” command”). I also searched about “SR-IOV on Xen3”, seems not much info can be found, anyway tried? Thanks.
Felix
From: xen-users-bounces@xxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of Sebastien Riccio
Sent: Wednesday, June 06, 2012 6:10 PM
To: Felix Chu
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] About 10GE performane on domU (with xen3.4.4)
Hi,
Have you already tried thoses suggestions:
http://wiki.xen.org/wiki/Network_Throughput_and_Performance_Guide
Cheers,
Sébastien
On 06.06.2012 10:35, Felix Chu wrote:
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.
Felix
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