Hi all, We are pleased to announce another update of Intel GVT-g for KVM.
Intel GVT-g for KVM (a.k.a. KVMGT) is a full GPU virtualization solution with mediated pass-through, starting from 5th generation Intel Core™ processors with Intel Graphics processors. A virtual GPU instance is maintained for each VM, with part of performance critical resources directly assigned. The capability of running native graphics driver inside a VM, without hypervisor intervention in performance critical paths, achieves a good balance among performance, feature, and sharing capability. Repositories: - Kernel: https://github.com/01org/igvtg-kernel (2016q2-4.3.0 branch) - Qemu: https://github.com/01org/igvtg-qemu (2016q2-2.3.0 branch) This update consists of: - KVMGT stable release for Xeon E3 v4 (Broadwell), E3 v5(Skylake), Intel Core™ processors 5th generation (Boadwell) , 6th generation (Skylake) - 2D/3D/Media workloads can run simultaneously in multiple guests Known issues: - At least 2GB memory is suggested for Guest Virtual Machine (VM) to run most 3D workloads. - Using Windows Media Player play videos may cause host crash. Using VLC to play .ogg file may cause mosaic or slow response. - Suggest to X window mode like xinit instead of lightdm to launch host if running heavy workload in both guest and host for more than 6 hours. - Change i915.preemption_policy=3 in host kernel cmdline, if you see problem when running heavy 3D workloads in multiple Guests (>=3) in some extreme stress configuration. Please subscribe to join the mailing list: - https://lists.01.org/mailman/listinfo/igvt-g Official iGVT-g portal: - https://01.org/igvt-g More information about background, architecture and others about Intel GVT-g, can be found at: http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian Note: The KVMGT project should be considered a work in progress. As such it is not a complete product nor should it be considered one. Extra care should be taken when testing and configuring a system to use the KVMGT project. -- Thanks, Jike On 04/16/2016 02:31 PM, Jike Song wrote: > Hi all, > > We are pleased to announce another update of Intel GVT-g for KVM. > > Intel GVT-g for KVM (a.k.a. KVMGT) is a full GPU virtualization solution with > mediated pass-through, starting from 4th generation Intel Core(TM) processors > with Intel Graphics processors. A virtual GPU instance is maintained for > each VM, with part of performance critical resources directly assigned. The > capability of running native graphics driver inside a VM, without hypervisor > intervention in performance critical paths, achieves a good balance among > performance, feature, and sharing capability. > > > Repositories: > > Kernel: https://github.com/01org/igvtg-kernel (2016q1-4.3.0 branch) > Qemu: https://github.com/01org/igvtg-qemu (2016q1-2.3.0 branch) > > > This update consists of: > > - KVMGT now has better support for 5th generation (Broadwell) Intel Core(TM) > processors, Xeon(R) E3 v4 > - A new feature, QEMU compositor display is added to support display VM in > QEMU window. (use i915.enable_vgtbuffer=1 in kernel command line to enable > this feature, disabled by default, details please refer to the Setup Guide) > - 2D/3D/Media workloads can be run simultaneously in multiple guests. > - Support both Windows Guest and Linux Guest(Win7-32, Win7-64, Win8.1-64, > Ubuntu14.04-64) > - Host Linux kernel has been upgraded from 4.2.0 to 4.3.0 (based on drm-intel) > - KVMGT has preliminary support for 6th generation (Skylake) Intel Core(TM) > processors. > > > Known issues: > > - At least 2GB memory is suggested for VM to run most 3D workloads. > - On some particular platform, assigning >2G memory to VM will cause Linux > VM failed to boot up and Windows VM failed to load GFX driver. > - Using VLC to play .ogg file may cause mosaic or slow response. > - Running heavy 3D workloads in multiple guests for couple of hours may > cause stability issue.(use i915.preemption_policy=3 in host kernel cmd line > can work around this stability issue) > > > Please subscribe to join the mailing list: > https://lists.01.org/mailman/listinfo/igvt-g > > Official iGVT-g portal: https://01.org/igvt-g > > More information about background, architecture and others about Intel GVT-g, > can be found at: > > > http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf > > https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian > > > The upstreaming effort of iGVT-g project is ongoing elsewhere, not as a part > of this release. > > > Note: > > The KVMGT project should be considered a work in progress. As such it is not > a complete product nor should it be considered one. Extra care should be > taken when testing and configuring a system to use the KVMGT project. > > > -- > Thanks, > Jike > > On 01/27/2016 02:32 PM, Jike Song wrote: >> Hi all, >> >> We are pleased to announce another update of Intel GVT-g for KVM. >> >> Intel GVT-g for KVM (a.k.a. KVMGT) is a full GPU virtualization solution >> with mediated pass-through, starting from 4th generation Intel Core(TM) >> processors with Intel Graphics processors. A virtual GPU instance is >> maintained for each VM, with part of performance critical resources directly >> assigned. The capability of running native graphics driver inside a VM, >> without hypervisor intervention in performance critical paths, achieves a >> good balance among performance, feature, and sharing capability. >> >> Repositories: >> >> Kernel: https://github.com/01org/igvtg-kernel (2015q4-4.2.0 branch) >> Qemu: https://github.com/01org/igvtg-qemu (kvmgt_public2015q4 branch) >> >> This update consists of: >> >> - KVMGT now has better support for 5th generation (Broadwell) Intel >> Core(TM) processors, 2D/3D/Media workloads can be run simultaneously in >> multiple guests. >> - Host Linux kernel has been upgraded from 3.18.0 to 4.2.0 (based on >> drm-intel) >> >> Next update will be around early April, 2016. >> >> Known issues: >> >> - At least 2GB memory is suggested for VM to run most 3D workloads. >> - Using VLC to play .ogg file may cause mosaic or slow response. >> - Running heavy 3D workloads in multiple guests for couple of hours may >> cause stability issue. >> >> Official iGVT-g portal: https://01.org/igvt-g >> Please subscribe the mailing list: >> https://lists.01.org/mailman/listinfo/igvt-g >> >> More information about background, architecture and others about Intel >> GVT-g, can be found at: >> >> http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf >> >> https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian >> >> >> Note: The KVMGT project should be considered a work in progress. As such it >> is not a complete product nor should it be considered one. Extra care should >> be taken when testing and configuring a system to use the KVMGT project. >> >> >> -- >> Thanks, >> Jike >> >> On 10/27/2015 05:36 PM, Jike Song wrote: >>> Hi all, >>> >>> We are pleased to announce another update of Intel GVT-g for KVM. >>> >>> Intel GVT-g is a full GPU virtualization solution with mediated >>> pass-through, starting from 4th generation Intel Core(TM) processors with >>> Intel Graphics processors. A virtual GPU instance is maintained for each >>> VM, with part of performance critical resources directly assigned. The >>> capability of running native graphics driver inside a VM, without >>> hypervisor intervention in performance critical paths, achieves a good >>> balance among performance, feature, and sharing capability. KVM is >>> supported by Intel GVT-g(a.k.a. KVMGT). >>> >>> >>> Repositories >>> >>> Kernel: https://github.com/01org/igvtg-kernel (2015q3-3.18.0 branch) >>> Qemu: https://github.com/01org/igvtg-qemu (kvmgt_public2015q3 branch) >>> >>> >>> This update consists of: >>> >>> - KVMGT is now merged with XenGT in unified repositories(kernel and >>> qemu), but currently >>> different branches for qemu. KVMGT and XenGT share same iGVT-g core >>> logic. >>> - PPGTT supported, hence the Windows guest support >>> - KVMGT now supports both 4th generation (Haswell) and 5th generation >>> (Broadwell) Intel Core(TM) processors >>> - 2D/3D/Media decoding have been validated on Ubuntu 14.04 and >>> Windows7/Windows 8.1 >>> >>> Next update will be around early Jan, 2016. >>> >>> Known issues: >>> >>> - At least 2GB memory is suggested for VM to run most 3D workloads. >>> - 3Dmark06 running in Windows VM may have some stability issue. >>> - Using VLC to play .ogg file may cause mosaic or slow response. >>> >>> >>> Please subscribe the mailing list to report BUGs, discuss, and/or >>> contribute: >>> >>> https://lists.01.org/mailman/listinfo/igvt-g >>> >>> More information about Intel GVT-g background, architecture, etc can be >>> found at(may not be up-to-date): >>> >>> https://01.org/igvt-g >>> http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf >>> >>> https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian >>> >>> >>> Note: >>> >>> The KVMGT project should be considered a work in progress. As such it is >>> not a complete product nor should it be considered one. Extra care should >>> be taken when testing and configuring a system to use the KVMGT project. >>> >>> >>> -- >>> Thanks, >>> Jike >>> >>> On 12/04/2014 10:24 AM, Jike Song wrote: >>>> Hi all, >>>> >>>> We are pleased to announce the first release of KVMGT project. KVMGT is >>>> the implementation of Intel GVT-g technology, a full GPU virtualization >>>> solution. Under Intel GVT-g, a virtual GPU instance is maintained for each >>>> VM, with part of performance critical resources directly assigned. The >>>> capability of running native graphics driver inside a VM, without >>>> hypervisor intervention in performance critical paths, achieves a good >>>> balance of performance, feature, and sharing capability. >>>> >>>> >>>> KVMGT is still in the early stage: >>>> >>>> - Basic functions of full GPU virtualization works, guest can see a >>>> full-featured vGPU. >>>> We ran several 3D workloads such as lightsmark, nexuiz, urbanterror >>>> and warsow. >>>> >>>> - Only Linux guest supported so far, and PPGTT must be disabled in >>>> guest through a >>>> kernel parameter(see README.kvmgt in QEMU). >>>> >>>> - This drop also includes some Xen specific changes, which will be >>>> cleaned up later. >>>> >>>> - Our end goal is to upstream both XenGT and KVMGT, which shares ~90% >>>> logic for vGPU >>>> device model (will be part of i915 driver), with only difference in >>>> hypervisor >>>> specific services >>>> >>>> - insufficient test coverage, so please bear with stability issues :) >>>> >>>> >>>> >>>> There are things need to be improved, esp. the KVM interfacing part: >>>> >>>> 1 a domid was added to each KVMGT guest >>>> >>>> An ID is needed for foreground OS switching, e.g. >>>> >>>> # echo <domid> > >>>> /sys/kernel/vgt/control/foreground_vm >>>> >>>> domid 0 is reserved for host OS. >>>> >>>> >>>> 2 SRCU workarounds. >>>> >>>> Some KVM functions, such as: >>>> >>>> kvm_io_bus_register_dev >>>> install_new_memslots >>>> >>>> must be called *without* &kvm->srcu read-locked. Otherwise it >>>> hangs. >>>> >>>> In KVMGT, we need to register an iodev only *after* BAR >>>> registers are >>>> written by guest. That means, we already have &kvm->srcu hold - >>>> trapping/emulating PIO(BAR registers) makes us in such a >>>> condition. >>>> That will make kvm_io_bus_register_dev hangs. >>>> >>>> Currently we have to disable rcu_assign_pointer() in such >>>> functions. >>>> >>>> These were dirty workarounds, your suggestions are high welcome! >>>> >>>> >>>> 3 syscalls were called to access "/dev/mem" from kernel >>>> >>>> An in-kernel memslot was added for aperture, but using syscalls >>>> like >>>> open and mmap to open and access the character device >>>> "/dev/mem", >>>> for pass-through. >>>> >>>> >>>> >>>> >>>> The source codes(kernel, qemu as well as seabios) are available at github: >>>> >>>> git://github.com/01org/KVMGT-kernel >>>> git://github.com/01org/KVMGT-qemu >>>> git://github.com/01org/KVMGT-seabios >>>> >>>> In the KVMGT-qemu repository, there is a "README.kvmgt" to be referred. >>>> >>>> >>>> >>>> More information about Intel GVT-g and KVMGT can be found at: >>>> >>>> >>>> https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian >>>> >>>> http://events.linuxfoundation.org/sites/events/files/slides/KVMGT-a%20Full%20GPU%20Virtualization%20Solution_1.pdf >>>> >>>> >>>> Appreciate your comments, BUG reports, and contributions! >>>> >>>> >>>> >>>> >>>> -- >>>> Thanks, >>>> Jike >>>>