zvoice@snto.ru
2007-Apr-18 03:44 UTC
[Xen-users] Bad network performance between VMs in a domain.
Hi! I have got this problem aching in my head. The speed between my VM and external machine is about 900Mb/s, but the speed between 2 VMs in one bridge is just about 20 Mb/s. What can i do with this? Please, help me out. I ve got a standart Xen configuration(bridge). Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
zvoice@snto.ru
2007-Apr-18 04:17 UTC
[Xen-users] Bad network performance between VMs in a domain.
Hi! I have got this problem aching in my head. The speed between my VM and external machine is about 900Mb/s, but the speed between 2 VMs in one bridge is just about 20 Mb/s. What can i do with this? Please, help me out. I ve got a standart Xen configuration(bridge). Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
zvoice@snto.ru
2007-Apr-18 09:59 UTC
RE: [Xen-users] Bad network performance between VMs in a domain.
I have got xen 3.0.3 and guests are in PVM исходное сообщение Тема: [Xen-users] Bad network performance between VMs in a domain. От: zvoice@snto.ru Дата: 18.04.2007 08.24 Hi! I have got this problem aching in my head. The speed between my VM and external machine is about 900Mb/s, but the speed between 2 VMs in one bridge is just about 20 Mb/s. What can i do with this? Please, help me out. I ve got a standart Xen configuration(bridge). Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Petersson, Mats
2007-Apr-18 10:11 UTC
RE: [Xen-users] Bad network performance between VMs in a domain.
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > zvoice@snto.ru > Sent: 18 April 2007 11:00 > To: Xen-users@lists.xensource.com > Subject: RE: [Xen-users] Bad network performance between VMs > in a domain. > > I have got xen 3.0.3 and guests are in PVMSorry for the private mail last time around, I meant to send to whole list: What is your system configuration, and what is your guest setup. E.g. does Dom0 have it''s own core, or is it sharing CPU-resources with guests? Are the guests running on their own core, or sharing between each other. Are the CPU''s pinned or "floating"? -- Mats> > исходное сообщение > Тема: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 08.24 > > Hi! > I have got this problem aching in my head. The speed between > my VM and > external machine is about 900Mb/s, but the speed between 2 > VMs in one bridge > is just about 20 Mb/s. What can i do with this? Please, help me out. > I ve got a standart Xen configuration(bridge). > Thanks. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
zvoice@snto.ru
2007-Apr-18 11:13 UTC
RE: [Xen-users] Bad network performance between VMs in a domain.
In my next message i ll give you to your questions, but i think the problem is when the packet comes from vif to bridge and then from bridge to another vif. But what is strange, that packets that pass through the vif to eth0 it goes with the maximum speed, but when this packet is to be transmitted from 1 vif to another in one vif it happens slowly. исходное сообщение Тема: RE: [Xen-users] Bad network performance between VMs in a domain. От: zvoice@snto.ru Дата: 18.04.2007 10.01 I have got xen 3.0.3 and guests are in PVM исходное сообщение Тема: [Xen-users] Bad network performance between VMs in a domain. От: zvoice@snto.ru Дата: 18.04.2007 08.24 Hi! I have got this problem aching in my head. The speed between my VM and external machine is about 900Mb/s, but the speed between 2 VMs in one bridge is just about 20 Mb/s. What can i do with this? Please, help me out. I ve got a standart Xen configuration(bridge). Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Petersson, Mats
2007-Apr-18 11:17 UTC
RE: [Xen-users] Bad network performance between VMs in a domain.
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > zvoice@snto.ru > Sent: 18 April 2007 12:13 > To: xen-users@lists.xensource.com > Subject: RE: [Xen-users] Bad network performance between VMs > in a domain. > > In my next message i ll give you to your questions, but i > think the problem is when the packet comes from vif to bridge > and then from bridge to another vif. But what is strange, > that packets that pass through the vif to eth0 it goes with > the maximum speed, but when this packet is to be transmitted > from 1 vif to another in one vif it happens slowly.I don''t see any reason why this should be. VIF to VIF should be as fast as VIF to Eth (if not faster). But there are so many factors that influence this, and CPU-starvation, interrupt latency are just a few factors. -- Mats> исходное сообщение > Тема: RE: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 10.01 > > I have got xen 3.0.3 and guests are in PVM > > исходное сообщение > Тема: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 08.24 > > Hi! > I have got this problem aching in my head. The speed between > my VM and > external machine is about 900Mb/s, but the speed between 2 > VMs in one bridge > is just about 20 Mb/s. What can i do with this? Please, help me out. > I ve got a standart Xen configuration(bridge). > Thanks. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
zvoice@snto.ru
2007-Apr-20 23:10 UTC
Re: [Xen-users] Bad network performance between VMs in a domain.
i have solved my problem using ethtool by switching crc sum on the interfaces off. So i have got the question. Why do we have such types of mistakes? I ''ll try to recompile my kernel in order to count crc_failed packets. If you know patches, that can improve Xen performance - please, mention them here. On Wednesday 18 April 2007 15:13:16 zvoice@snto.ru wrote:> In my next message i ll give you to your questions, but i think the problem > is when the packet comes from vif to bridge and then from bridge to another > vif. But what is strange, that packets that pass through the vif to eth0 it > goes with the maximum speed, but when this packet is to be transmitted from > 1 vif to another in one vif it happens slowly. исходное сообщение > Тема: RE: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 10.01 > > I have got xen 3.0.3 and guests are in PVM > > исходное сообщение > Тема: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 08.24 > > Hi! > I have got this problem aching in my head. The speed between my VM and > external machine is about 900Mb/s, but the speed between 2 VMs in one > bridge is just about 20 Mb/s. What can i do with this? Please, help me out. > I ve got a standart Xen configuration(bridge). > Thanks. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-usersOn Wednesday 18 April 2007 15:13:16 zvoice@snto.ru wrote:> In my next message i ll give you to your questions, but i think the problem > is when the packet comes from vif to bridge and then from bridge to another > vif. But what is strange, that packets that pass through the vif to eth0 it > goes with the maximum speed, but when this packet is to be transmitted from > 1 vif to another in one vif it happens slowly. исходное сообщение > Тема: RE: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 10.01 > > I have got xen 3.0.3 and guests are in PVM > > исходное сообщение > Тема: [Xen-users] Bad network performance between VMs in a domain. > От: zvoice@snto.ru > Дата: 18.04.2007 08.24 > > Hi! > I have got this problem aching in my head. The speed between my VM and > external machine is about 900Mb/s, but the speed between 2 VMs in one > bridge is just about 20 Mb/s. What can i do with this? Please, help me out. > I ve got a standart Xen configuration(bridge). > Thanks. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users