Re: [Intel-gfx] [Announcement] 2015-Q2 release of XenGT - a Mediated Graphics Passthrough Solution from Intel

[Jike Song]

Hi all,

We're pleased to announce a public update to Intel Graphics Virtualization Technology(Intel GVT-g, formerly known as XenGT).

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. Xen is currently supported on Intel Processor Graphics (a.k.a. XenGT); and the core logic can be easily ported to other hypervisors, for example, the experimental code has been released to support GVT-g running on a KVM hypervisor (a.k.a KVMGT).

Tip of repositories
-------------------------

    Kernel: 5b73653d5ca, Branch: master-2015Q2-3.18.0
    Qemu: 2a75bbff62c1, Branch: master
    Xen: 38c36f0f511b1, Branch: master-2015Q2-4.5

This update consists of:
    - Change time based scheduler timer to be configurable to enhance stability
    - Fix stability issues that VM/Dom0 got tdr when hang up at some specific instruction on BDW
    - Optimize the emulation of el_status register to enhance stability
    - 2D/3D performance in linux VMs has been improved about 50% on BDW
    - Fix abnormal idle power consumption issue due to wrong forcewake policy
    - Fix tdr issue when running 2D/3D/Media workloads in Windows VMs simultaneously
    - KVM support is still in a separate branch as prototype work. We plan to integrate KVM/Xen support together in the future releases
    - Next update will be around early Oct, 2015

Notice that this release can support both Intel 4th generation Core CPU(code name: Haswell) and Intel 5th generation Core CPU (code name: Broadwell), while the limitation of the latter include:
    * 3D conformance may have some failure
    * Under high demand 3D workloads, stability issues are detected
    * Multi-monitor scenario is not fully tested, while single monitor of VGA/HDMI/DP/eDP should just work
    * Hotplug DP may cause black screen even on native environment

Where to get

kernel: https://github.com/01org/XenGT-Preview-kernel.git
xen: https://github.com/01org/XenGT-Preview-xen.git
qemu: https://github.com/01org/XenGT-Preview-qemu.git


We have a mailing list for GVT-g development, bug report and technical discussion:

    https://lists.01.org/mailman/listinfo/igvt-g

More information about Intel GVT-g background, architecture, etc can be found at:

    https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
    http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20Summit-v7_0.pdf
    https://01.org/xen/blogs/srclarkx/2013/graphics-virtualization-xengt


Note: The XenGT 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 XenGT project.


--
Thanks,
Jike

On 04/10/2015 09:23 PM, Jike Song wrote:
> Hi all,
>
> We're pleased to announce a public update to Intel Graphics Virtualization Technology (Intel GVT-g, formerly known as XenGT). Intel GVT-g is a complete vGPU solution with mediated pass-through, supported today on 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. Though we only support Xen on Intel Processor Graphics so far, the core logic can be easily ported to other hypervisors.
>
> Tip of repositories
> -------------------------
>
>            Kernel: a011c9f953e, Branch: master-2015Q1-3.18.0
>            Qemu: 2a75bbff62c1, Branch: master
>            Xen: 38c36f0f511b1, Branch: master-2015Q1-4.5
>
> Summary this update
> -------------------------
> 	- Preliminary Broadwell support.
> 	- kernel update from drm-intel 3.17.0 to drm-intel 3.18.0(tag: drm-intel-next-fixes-2014-12-17, notice that i915 driver code is much newer than kernel stable version).
> 	- Next update will be around early July, 2015.
> 	- KVM support is still in a separate branch as prototype work. We plan to integrate KVM/Xen support together in future releases.
>
> This update consists of:
> 	- gvt-g core logic code was moved into i915 driver directory.
> 	- Host mediation is used for dom0 i915 driver access, instead of de-privileged dom0.
> 	- The Xen-specific code was separated from vgt core logic into a new file "driver/xen/xengt.c".
> 	- Broadwell is preliminarily supported in this release. Users could start multiple linux/windows 64-bit virtual machines simultaneously, and perform display switch among them.
>
> Notice that it is still preliminary release for BDW, which is not yet in the same level of HSW release. Differences include:
>                   * Power/performance tuning on BDW is not yet done.
> 	 * Stability needs to be improved.
>                   * No 32-bit guest OS support.
>                   * Multi-monitor scenario is not fully tested, while single monitor of VGA/HDMI/DP/eDP should just work.
>
>
> Where to get:
> -----------------
>                   kerenl: https://github.com/01org/XenGT-Preview-kernel.git
>                   Xen: https://github.com/01org/XenGT-Preview-xen.git
>                   Qemu: https://github.com/01org/XenGT-Preview-qemu.git
>
> Please refer to the new setup guide, which provides step-to-step details about building/configuring/running Intel GVT-g:
> 	 https://github.com/01org/XenGT-Preview-kernel/blob/master-2015Q1-3.18.0/XenGT_Setup_Guide_2015Q1.pdf
>
> More information about Intel GVT-g background, architecture, etc can be found at:
>                   https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
>                   http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20Summit-v7_0.pdf
>                   https://01.org/xen/blogs/srclarkx/2013/graphics-virtualization-xengt
>
> The previous update can be found here:
>                  http://lists.xen.org/archives/html/xen-devel/2014-12/msg00474.html
>
>
> Note
> ---------------
> 	The XenGT 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 XenGT project.
>
>
> --
> Thanks,
> Jike
>
> On 01/09/2015 04:51 PM, Jike Song wrote:
> > Hi all,
> >
> >      We're pleased to announce a public update to Intel Graphics Virtualization Technology (Intel GVT-g, formerly known as XenGT). Intel GVT-g is a complete vGPU solution with mediated pass-through, supported today on 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. Though we only support Xen on Intel Processor Graphics so far, the core logic can be easily ported to other hypervisors.   The XenGT 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 XenGT project.
> >
> > The news of this update:
> >
> > 	- kernel update from 3.14.1 to drm-intel 3.17.0.
> > 	- We plan to integrate Intel GVT-g as a feature in i915 driver. That effort is still under review, not included in this update yet.
> > 	- Next update will be around early Apr, 2015.
> >
> > This update consists of:
> >
> > 	- Including some bug fixes and stability enhancement.
> > 	- Making XenGT device model to be aware of Broadwell. In this version BDW is not yet functioning.
> > 	- Available Fence registers number is changed to 32 from 16 to align with HSW hardware.
> > 	- New cascade interrupt framework for supporting interrupt virtualization on both Haswell and Broadwell.
> > 	- Add back the gem_vgtbuffer. The previous release did not build that module for 3.14 kernel. In this release, the module is back and rebased to 3.17.
> > 	- Enable the irq based context switch in vgt driver, which will help reduce the cpu utilization while doing context switch, it is enabled by default, and can be turn off by kernel flag irq_based_ctx_switch.
> >
> >
> > Please refer to the new setup guide, which provides step-to-step details about building/configuring/running Intel GVT-g:
> >
> > 	https://github.com/01org/XenGT-Preview-kernel/blob/master/XenGT_Setup_Guide.pdf
> >
> > The new source codes are available at the updated github repos:
> >
> > 	Linux: https://github.com/01org/XenGT-Preview-kernel.git
> > 	Xen: https://github.com/01org/XenGT-Preview-xen.git
> > 	Qemu: https://github.com/01org/XenGT-Preview-qemu.git
> >
> >
> > More information about Intel GVT-g background, architecture, etc can be found at:
> >
> >
> > 	https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
> > 	http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20Summit-v7_0.pdf
> > 	https://01.org/xen/blogs/srclarkx/2013/graphics-virtualization-xengt
> >
> >
> >
> > The previous update can be found here:
> >
> >
> > 	http://lists.xen.org/archives/html/xen-devel/2014-12/msg00474.html
> >
> >
> >
> > Appreciate your comments!
> >
> >
> >
> > --
> > Thanks,
> > Jike
> >
> >
> > On 12/04/2014 10:45 AM, Jike Song wrote:
> > > Hi all,
> > >
> > > We're pleased to announce a public release to Intel Graphics Virtualization Technology (Intel GVT-g, formerly known as XenGT). Intel GVT-g is a complete vGPU solution with mediated pass-through, supported today on 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. Though we only support Xen on Intel Processor Graphics so far, the core logic can be easily ported to other hypervisors.
> > >
> > >
> > > The news of this update:
> > >
> > >
> > > 	- kernel update from 3.11.6 to 3.14.1
> > >
> > > 	- We plan to integrate Intel GVT-g as a feature in i915 driver. That effort is still under review, not included in this update yet
> > >
> > > 	- Next update will be around early Jan, 2015
> > >
> > >
> > > This update consists of:
> > >
> > > 	- Windows HVM support with driver version 15.33.3910
> > >
> > > 	- Stability fixes, e.g. stabilize GPU, the GPU hang occurrence rate becomes rare now
> > >
> > > 	- Hardware Media Acceleration for Decoding/Encoding/Transcoding, VC1, H264 etc. format supporting
> > >
> > > 	- Display enhancements, e.g. DP type is supported for virtual PORT
> > >
> > > 	- Display port capability virtualization: with this feature, dom0 manager could freely assign virtual DDI ports to VM, not necessary to check whether the corresponding physical DDI ports are available
> > >
> > >
> > >
> > > Please refer to the new setup guide, which provides step-to-step details about building/configuring/running Intel GVT-g:
> > >
> > >
> > > 	https://github.com/01org/XenGT-Preview-kernel/blob/master/XenGT_Setup_Guide.pdf
> > >
> > >
> > >
> > > The new source codes are available at the updated github repos:
> > >
> > >
> > > 	Linux: https://github.com/01org/XenGT-Preview-kernel.git
> > >
> > > 	Xen: https://github.com/01org/XenGT-Preview-xen.git
> > >
> > > 	Qemu: https://github.com/01org/XenGT-Preview-qemu.git
> > >
> > >
> > > More information about Intel GVT-g background, architecture, etc can be found at:
> > >
> > >
> > > 	https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
> > >
> > > 	http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20Summit-v7_0.pdf
> > >
> > > 	https://01.org/xen/blogs/srclarkx/2013/graphics-virtualization-xengt
> > >
> > >
> > > The previous update can be found here:
> > >
> > >
> > > 	http://lists.xen.org/archives/html/xen-devel/2014-07/msg03248.html
> > >
> > >
> > > Appreciate your comments!
> > >
> > >
> > > --
> > > Thanks,
> > > Jike
> > >
> > > On 07/25/2014 04:31 PM, Jike Song wrote:
> > > > Hi all,
> > > >
> > > > We're pleased to announce an update to Intel Graphics Virtualization Technology (Intel GVT-g, formerly known as XenGT). Intel GVT-g is a complete vGPU solution with mediated pass-through, supported today on 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. Though we only support Xen on Intel Processor Graphics so far, the core logic can be easily ported to other hypervisors.
> > > >
> > > > The news of this update:
> > > >
> > > > 	- Project code name is "XenGT", now official name is Intel Graphics Virtualization Technology (Intel GVT-g)
> > > > 	- Currently Intel GVT-g supports Intel Processor Graphics built into 4th generation Intel Core processors - Haswell platform
> > > > 	- Moving forward, XenGT will change to quarterly release cadence. Next update will be around early October, 2014.
> > > >
> > > > This update consists of:
> > > >
> > > > 	- Stability fixes, e.g. stable DP support
> > > > 	- Display enhancements, e.g. virtual monitor support. Users can define a virtual monitor type with customized EDID for virtual machines, not necessarily the same as physical monitors.
> > > > 	- Improved support for GPU recovery
> > > > 	- Experimental Windows HVM support. To download the experimental version, see setup guide for details
> > > > 	- Experimental Hardware Media Acceleration for decoding.
> > > >
> > > >
> > > > Please refer to the new setup guide, which provides step-to-step details about building/configuring/running Intel GVT-g:
> > > >
> > > > 	https://github.com/01org/XenGT-Preview-kernel/blob/master/XenGT_Setup_Guide.pdf
> > > >
> > > >
> > > > The new source codes are available at the updated github repos:
> > > >
> > > > 	Linux: https://github.com/01org/XenGT-Preview-kernel.git
> > > > 	Xen: https://github.com/01org/XenGT-Preview-xen.git
> > > > 	Qemu: https://github.com/01org/XenGT-Preview-qemu.git
> > > >
> > > >
> > > > More information about Intel GVT-g background, architecture, etc can be found at:
> > > >
> > > > 	https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
> > > > 	http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20Summit-v7_0.pdf
> > > > 	https://01.org/xen/blogs/srclarkx/2013/graphics-virtualization-xengt
> > > >
> > > > The previous update can be found here:
> > > >
> > > > 	http://lists.xen.org/archives/html/xen-devel/2014-02/msg01848.html
> > > >
> > > > Appreciate your comments!
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Thanks,
> > > > Jike
--
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