Brian, Many thanks for giving me so informative stuff. I have learnt a lot from them.
Do you mean you will contribute in VBOX to make it(SR-IOV) work? If it is YES, that is great! The I/O virtualization is not in the roadmap of VBOX yet. I just hope to bring it into the considerations of VBOX developers. Thanks. Fred > -----Original Message----- > From: vbox-dev-boun...@virtualbox.org [mailto:vbox-dev- > boun...@virtualbox.org] On Behalf Of Brian Johnson > Sent: 星期五, 三月 04, 2011 7:21 > To: vbox-dev@virtualbox.org > Subject: Re: [vbox-dev] Any plan to support SR-IOV? > > Fred Liu <Fred_Liu@...> writes: > > > > > Thanks for the clarification. > > Intel 82576 nic has been released for more one year, it will be > easier and > easier to find. > > I/O performance bottleneck is really the barrier to deploy > virtualization > confidently. > > KVM and XEN is sort of ahead of VBOX in this aspect. > > > > Thanks. > > > > Fred > > > > -----Original Message----- > > From: Alexey Eromenko [mailto:al4321@...] > > Sent: Thursday, March 03, 2011 10:54 PM > > To: Fred Liu > > Cc: vbox-dev@... > > Subject: Re: [vbox-dev] Any plan to support SR-IOV? > > > > On Thu, Mar 3, 2011 at 4:42 PM, Fred Liu <Fred_Liu@...> wrote: > > > > > > > > > -----Original Message----- > > > From: Fred Liu > > > Sent: Thursday, March 03, 2011 1:53 PM > > > To: vbox-dev@... > > > Subject: Any plan to support SR-IOV? > > > > > > > SR-IOV is a host technology, not a hypervisor one. > > > > What hypervisor should support is VT-d, then SR-IOV gets supported > > automatically. > > > > There were few commits in the VBox source tree with regards to VT-d > > support, but it looks like very early status. > > In Addition, Hardware is too scarse to test it for community members > to help. > > > > Fred, > > I should start off by stating that I work at Intel in the LAN Access > Division. > I am responsible for 10Gb Ethernet and Virtualization technologies like > SR-IOV > on Intel(R) Ethernet Controllers. > > SR-IOV-capable devices provide configurable numbers of independent VFs, > each > with its own PCI Configuration space. The VMM assigns one or more VF to > a > virtual machine. Memory Translation technologies such as those in > Intel® VT-x > and Intel® VT-d provide hardware assisted techniques to allow direct > DMA > transfers to and from the VM, thus bypassing the software switch in the > VMM. > > The Intel(R) 82599 Ethernet Controllers and Intel(R) 82576 Ethernet > Controllers support SR-IOV and can be found on a wide selection of > adapters > and as LOMs on many server boards. The 82576 is our 1Gb part and > provides up > to 8 VFs and 82599 is our 10Gb part with up to 64 VFs. > > To use SR-IOV you need to have VT-d enabled in the server BIOS like the > previous post stated BUT you also need to have an SR-IOV enabled BIOS. > Some > server support VT-d but do not support SR-IOV because the BIOS does not > setup > the PCI config space for the VFs. Several server OEMs offer systems > that have > SR-IOV enabled, such as the Dell R710 and R910 and most of the current > Intel > Server Boards and Systems. I know that other systems have been enabled > with > the SR-IOV BOIS so please check your server model and BIOS version > before > trying to setup SR-IOV. > > Ecosystem Requirements taken from Patrick Kutch's PCI-SIG SR-IOV Primer > Revision 2.5 -- > http://download.intel.com/design/network/applnots/321211.pdf > > BIOS > The BIOS performs a role in partitioning Memory Mapped I/O and PCI > Express Bus > numbers between host bridges. > In many systems, mechanisms for allocating PCI resources to the host > bridges > are not standardized and software relies on the BIOS to configure these > devices with sufficient memory space and bus ranges to support I/O > devices in > the hierarchy beneath each host bridge. > BIOS enumeration code needs to be enhanced to recognize SR-IOV devices > so that > enough MMIO (Memory Mapped IO) space is allocated to encompass the > requirements of VFs. Refer to the PCI-SIG SR-IOV specification for > details on > how to parse PCI Config space and calculate the maximum amount of VF > MMIO > space required. > > Here are some other links that a Patrick and I have put together. > > Here is a link to a Video that Patrick Kutch did explaining how SR-IOV > works – > http://www.youtube.com/watch?v=hRHsk8Nycdg > > Here is a link to more technical resources that Patrick has regarding > SR-IOV. > http://communities.intel.com/people/Patrick_Kutch?view=overview > > Thanks, > Brian Johnson > Intel Corp > > > > _______________________________________________ > vbox-dev mailing list > vbox-dev@virtualbox.org > http://vbox.innotek.de/mailman/listinfo/vbox-dev _______________________________________________ vbox-dev mailing list vbox-dev@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-dev