From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hui Kang Subject: dom0 kernel v2.6.32.41 network problem Date: Fri, 15 Jul 2011 17:54:11 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0386370709==" Return-path: Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org --===============0386370709== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_CA45F7026312hkangcsstonybrookedu_" --_000_CA45F7026312hkangcsstonybrookedu_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I am running two hosts with xen-4.0.1 and dom0 kernel 2.6.32.41. The two ho= sts are connected to a Gigbit switch. Then I use iperf to measure the bandw= idth and got the results of 200Mbit/second, which is only 1/5 of the availa= ble bandwidth. Then I boot these two hosts using a vanilla kernel of 2.6.32.34. The iperf = reports 937Mbis/s, which is very close to the available link bandwidth. So why the pvops dom0 kernel performs so bad? Does anyone observe similar p= roblem? Thanks. - Hui --_000_CA45F7026312hkangcsstonybrookedu_ Content-Type: text/html; charset="us-ascii" Content-ID: <7768C97B44E59841B58F18FB83D9F7F4@cs.stonybrook.edu> Content-Transfer-Encoding: quoted-printable

Hi,

I am running two hosts with xen-4.0.1 and dom0 kernel 2.6.32.41. The t= wo hosts are connected to a Gigbit switch. Then I use iperf to measure the = bandwidth and got the results of 200Mbit/second, which is only 1/5 of the a= vailable bandwidth.

Then I boot these two hosts using a vanilla kernel of 2.6.32.34. The i= perf reports 937Mbis/s, which is very close to the available link bandwidth= .

So why the pvops dom0 kernel performs so bad? Does anyone observe simi= lar problem? Thanks.

- Hui

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