On Fri, Aug 30, 2013 at 4:07 PM, laurence.schuler <[email protected] > wrote:
> Hi, > I am trying to configure two identical systems with the following setup. > > dom0: Centos 6 OS on Apple Xserve i7 server with PCI cards for 4GB FC > (LSI FC949ES) and 10GB Ethernet (Intel 82598EB) > > dom1: Centos 5 OS with passthru mode of PCI 4GB FC and 10GB Ethernet > (ixgbe and mptfc blacklisted in dom0) > > Everything starts ok, but networking in dom1 using the 10GB interface > has extremely high rtt w/ping tests (20-30ms avg). > > I've tried a few tweaks I've discovered via googling, but nothing seems > to help. (run libvirt as root, set privilege mode, etc) > > For validation, I have the same card in Dell hosts running Centos 6 > natively and they get an avg rtt of .06ms or better. Furthemore the Dell > will contact the dom1 but the connection has rtt avg times of about 6ms. > > With the ethernet interface on the motherboard of the Apple Xserve, I > will see rtt times of .06ms within the dom1's, so I think this points to > a problem with the Intel card passthru usage, perhaps interrupts handling?. > > Does anyone know if I need to set any special options for the ixgbe > driver under libvirt? > > TIA, > Larry, While I don't know of any specifics for your card that libvirt could help with, it doesn't mean there aren't any. You might have a better time asking on the qemu-users ML at https://lists.nongnu.org/mailman/listinfo/qemu-discuss but you are dealing with a very specific card so your range of people with knowledge of that card might be small. -- Doug > > -- > Laurence Schuler (Larry) [email protected] > Systems Support ADNET Systems, Inc > Scientific Visualization Studio http://svs.gsfc.nasa.gov > NASA/Goddard Space Flight Center, Code 606.4 phone: 1-301-286-1799 > Greenbelt, MD 20771 fax: 1-301-286-1634 > Note: I am not a government employee and have no authority to obligate > any federal, state or local government to perform any action or > payment.FC949ES > > _______________________________________________ > libvirt-users mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/libvirt-users > -- Doug Goldstein
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