Re: [iGVT-g] [ANNOUNCE][RFC] KVMGT - the implementation of Intel GVT-g(full GPU virtualization) for KVM
by Jike Song
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%20Ful...
>
>
> Appreciate your comments, BUG reports, and contributions!
>
>
>
>
> --
> Thanks,
> Jike
>
4 years, 7 months
Re: [iGVT-g] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel
by Jike Song
Hi all,
We are pleased to announce another update of Intel GVT-g for Xen.
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.
Repositories
Kernel: https://github.com/01org/igvtg-kernel (2015q3-3.18.0 branch)
Xen: https://github.com/01org/igvtg-xen (2015q3-4.5 branch)
Qemu: https://github.com/01org/igvtg-qemu (xengt_public2015q3 branch)
This update consists of:
- XenGT is now merged with KVMGT in unified repositories(kernel and qemu), but currently
different branches for qemu. XenGT and KVMGT share same iGVT-g core logic.
- fix sysfs/debugfs access seldom crash issue
- fix a BUG in XenGT I/O emulation logic
- improve 3d workload stability
Next update will be around early Jan, 2016.
Known issues:
- At least 2GB memory is suggested for VM to run most 3D workloads.
- Keymap might be incorrect in guest. Config file may need to explicitly specify "keymap='en-us'". Although it looks like the default value, earlier we saw the problem of wrong keymap code if it is not explicitly set.
- When using three monitors, doing hotplug between Guest pause/unpause may not be able to lightup all monitors automatically. Some specific monitor issues.
- Cannot move mouse pointer smoothly in guest by default launched by VNC mode. Configuration file need to explicitly specify "usb=1" to enable a USB bus, and "usbdevice='tablet'" to add pointer device using absolute coordinates.
- Resume dom0 from S3 may cause some error message.
- i915 unload/reload cannot works well with less than 3 vcpu when upowerd service was running
- Unigen Tropics running in multiple guests will cause dom0 and guests tdr.
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
https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian
http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20S...
http://events.linuxfoundation.org/sites/events/files/slides/XenGT-Xen%20S...
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 07/07/2015 10:49 AM, 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 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%20S...
> 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/X...
>>
>> 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%20S...
>> 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_Gui...
>>>
>>> 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%20S...
>>> 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_Gui...
>>>>
>>>>
>>>>
>>>> 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%20S...
>>>>
>>>> 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_Gui...
>>>>>
>>>>>
>>>>> 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%20S...
>>>>> 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
>>>>>
4 years, 7 months
machine q35
by Greg Hazel
Hi,
I’m trying to get iGVT working with machine type “q35” in qemu (KVMGT). The default type (i440fx) boots with vgt, but if I take a working q35 machine and add “-display sdl -vgt -vga vgt” it fails to start.
Instead, I get a qemu console called “compat_monitor0” at Ctrl-Alt-Shift-1.
Is q35 supported?
-Greg
4 years, 7 months
Corrupted display with the GVT-g ISO 2016-Q2
by Bao Ha
Hello,
I could not run the ISO. It boots up fine in the text mode. However, when
it switches to graphics, the screen becomes corrupted so I cannot try the
KVM/XEN demos or attempt to install it on the HD.
It boots up and runs Ubuntu 14.04 fine.
The hardware is Intel NUC6i5SYH with i5-6260U CPU (Intel Iris graphics).
The monitor is Acer UT220HQL (Touch screen monitor).
Appreciate any comments or suggestions.
Thanks.
Bao
--
Best Regards.
Bao C. Ha
Hacom - Embedded Systems and Appliances
http://www.hacom.net
voice: 657-859-9422
4 years, 7 months
Fwd: va-api h264 hw accelerated encoding performance issue with igvt-g 2016Q1 release kernel/driver
by Kristine Ferrell
---------- Forwarded message ----------
From: *Kristine Ferrell* <dallasbixin(a)gmail.com>
Date: Sunday, June 5, 2016
Subject: va-api h264 hw accelerated encoding performance issue with igvt-g
2016Q1 release kernel/driver
To: igvt-g(a)lists.01.org
Hi Guys,
I noticed when using va-api to accelerate h264 encoding on intel
platform with i7-4790K (HD Graphics 4600), for 1080P video frames, per
frame average encoding time is 3 times of the time tested under
4.2.0-27-generic #32~14.04.1-Ubuntu kernel.
The latest libva and intel vaapi driver (1.7.0) are used in both tests.
Is this a known side effect caused by the igvt-g feature? If yes, may
I know when this is expected to be fixed?
Best,
Kristine
--
Sent from Gmail Mobile
4 years, 7 months
guarantee of GPU performance in given VM
by Delsol, Thomas
Hi everyone,
I have the following questions regarding igvt-g solution :
1. Is there any documentation describing the igvt-g kernel boot parameters (event_based_qos, preemption_policy, reset_count_threshold...) ?
2. Is this possible to specify GPU priority per VM ?
If yes, how can it be achieved and is it possible to also set per process priority within a given VM?
3. Is this possible to guarantee GPU bandwidth for a particular VM and if yes how can it be achieved ?
Best regards,
Thomas
4 years, 7 months
iGVT-g Haswell support? Windows 10 support?
by Andre Oliveira
Hi,
I've got an Intel 4800MQ (Haswell) which I'm trying to configure with
igvt-g.
Does Haswell support on Xen still exist?
I also remember reading that Windows 10 support was preliminary.
Is this on KVMGT, XENGT or Both?
What about Windows 8.1?
What I'm attempting to do is what János Horváth and Toni Bolduan are doing.
Use the igvt-g technology with an Nvidia GPU that sends it's image
directly to the Intel GPU framebuffer (Nvidia Optimus).
I managed to have on KVM a Windows 10 that detected both GPUs and even
installed the drivers automatically.
This was short-lived as the screen went black as soon as the Intel
drivers were installed (I only just found out about the lack of Haswell
igvt-g on KVM support).
If Haswell is still supported on Xen, I'll try running my image on it
and share my results.
Will Haswell igvt-g on KVM ever be considered?
I'm just asking as it seems most laptop users with Nvidia Optimus
technology seem to have CPUs from this generation.
Kind Regards,
André Oliveira
4 years, 7 months
