Hi, I have XEN 3.3 on Centos 5.4, my network interface have link 1 Gbps I want improve speed of network interface on virtual machine, from 100Mbps to 1Gpbs. Somebody have link that show do this ? Thank . -- *Bruno Steven - Administrador de sistemas* *LPIC-2 / MCSA-Windows 2003 / CompTIA Security+ * _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Bruno Steven wrote:>I have XEN 3.3 on Centos 5.4, my network interface have link 1 Gbps >I want improve speed of network interface on virtual machine, from >100Mbps to 1Gpbs.AFAIK there is no 100Mbps limit on DomU virtual NICs. They may show up in DomU as 100M but that''s just an emulated NIC and not real hardware. I think the only limit is the speed of the real NICs and the ability of Dom0 to process packets. I think this latter bit is the most likely. I believe the code is single threaded and there have been lots of threads on this list over the years about poor network performance in DomUs -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sun, Aug 28, 2011 at 09:38:47AM +0100, Simon Hobson wrote:> Bruno Steven wrote: > >> I have XEN 3.3 on Centos 5.4, my network interface have link 1 Gbps I >> want improve speed of network interface on virtual machine, from >> 100Mbps to 1Gpbs. > > AFAIK there is no 100Mbps limit on DomU virtual NICs. They may show up in > DomU as 100M but that''s just an emulated NIC and not real hardware. I > think the only limit is the speed of the real NICs and the ability of > Dom0 to process packets. > > I think this latter bit is the most likely. I believe the code is single > threaded and there have been lots of threads on this list over the years > about poor network performance in DomUs >Yep, sounds like you''re using the emulated realtek rtl8139 nic in the VM. It reports 100 Mbps but it''s NOT limited to 100 Mbps, because it''s virtual nic. Then again rtl8139 is quite crappy, even when emulated, so you might want to switch to intel e1000 vnic (model=e1000). It''s the fastest emulated nic. Even better is of course to use Xen PVHVM drivers (PV-on-HVM), where you don''t have any kind of emulation, just straight PV drivers talking directly to Xen. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Thu September 29 2011, Pasi Kärkkäinen wrote:> Yep, sounds like you''re using the emulated realtek rtl8139 nic in the VM. > It reports 100 Mbps but it''s NOT limited to 100 Mbps, because it''s virtual > nic.> Then again rtl8139 is quite crappy, even when emulated, so you might want to > switch to intel e1000 vnic (model=e1000). It''s the fastest emulated nic.When I tried this, I couldn''t find the right driver in WinXP. I tried all the Intel Pro 1000 drivers. What did you use? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sun, Sep 11, 2011 at 02:02:43AM -0400, jim burns wrote:> On Thu September 29 2011, Pasi Kärkkäinen wrote: > > Yep, sounds like you''re using the emulated realtek rtl8139 nic in the VM. > > It reports 100 Mbps but it''s NOT limited to 100 Mbps, because it''s virtual > > nic. > > > Then again rtl8139 is quite crappy, even when emulated, so you might want to > > switch to intel e1000 vnic (model=e1000). It''s the fastest emulated nic. > > When I tried this, I couldn''t find the right driver in WinXP. I tried all the > Intel Pro 1000 drivers. What did you use? >Hmm, I can''t remember.. Did you check the virtual e1000 nic model, and then get the driver from intel''s support site? Also: Why not use PV drivers? -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sun September 11 2011, 2:07:31 PM, Pasi Kärkkäinen wrote:> Hmm, I can''t remember.. > > Did you check the virtual e1000 nic model, and then get the driver > from intel''s support site?Hmm, on http://downloadcenter.intel.com/default.aspx?lang=eng , in the ''Search downloads'' drop down box for ''intel pro/1000'', I get: Download Center Find drivers, BIOS, utilities, firmware, patches, updates, plug-ins and other support software. Intel PRO/1000 CT Network Connection Intel PRO/1000 F Server Adapter Intel PRO/1000 Gigabit Server Adapter Intel PRO/1000 GT Desktop Adapter Intel PRO/1000 MF Server Adapter Intel PRO/1000 MT Desktop Adapter Intel PRO/1000 MT Server Adapter Intel PRO/1000 PF Server Adapter Intel PRO/1000 PM Network Connection Intel PRO/1000 PT Desktop Adapter which looks a lot like the choices in the WinXP Hardware Wizard, none of which would ''start'' the qemu nic. And the ''product family'' box choices for ''Ethernet Components -> Ethernet Controllers'' return a bewildering and unfamiliar array of choices. There is also an .msi you can download for their Driver Update Utility which I''ll try later. Can you help me refine my search? Thanx.> Also: Why not use PV drivers?I do, but there are development situations where the gplpv drivers stop working, and I need something to fall back on, and you were recommending the ''model=e1000'' option over the rtl8139. I''m just exploring. (E.g. - when I was testing fedora rawhide 3.0.0, the gplpv drivers were unreliable. I finally realized that rawhide kernels are debug kernels, and are going to be very slow, and introduce timing problems. That was a thread from two months ago.) (Later - I tried installing the Driver Update Utility - it didn''t do anything. I think it''s because it requires ActiveX/Java, and I don''t have Java on my guest.) _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sun, Sep 11, 2011 at 09:43:27PM -0400, jim burns wrote:> On Sun September 11 2011, 2:07:31 PM, Pasi Kärkkäinen wrote: > > Hmm, I can''t remember.. > > > > Did you check the virtual e1000 nic model, and then get the driver > > from intel''s support site? > > Hmm, on http://downloadcenter.intel.com/default.aspx?lang=eng , in the ''Search > downloads'' drop down box for ''intel pro/1000'', I get: >I think you need to check the exact chipset model number.. Boot for example Linux VM and check lspci, if windows doesn''t show it. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
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