delivering high-performance remote graphics with nvidia ......delivering high-performance remote...
TRANSCRIPT
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DELIVERING HIGH-PERFORMANCE REMOTE GRAPHICS WITH NVIDIA GRID VIRTUAL GPU
Andy Currid
NVIDIA
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WHAT YOU’LL LEARN IN THIS SESSION
NVIDIA's GRID Virtual GPU Architecture
— What it is and how it works
Using GRID Virtual GPU on Citrix XenServer
How to deliver great remote graphics from GRID Virtual GPU
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ENGINEER / DESIGNER
KNOWLEDGE WORKER
POWER USER
Workstation
High-end PC
Entry-level PC
WHY VIRTUALIZE?
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Desktop workstation
QuadroGPU
Awesome performance!
High cost
Hard to fully utilize, limited mobility
Challenging to manage
Data security can be a problem
WHY VIRTUALIZE?
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Notebook or thin client
Datacenter
Desktop workstation
QuadroGPU
… CENTRALIZE THE WORKSTATION
Awesome
performance!
Easier to fully
utilize, manage
and secure
Even more
expensive!
Remote
Graphics
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Notebook or thin client
Datacenter
GPU-enabled server
Remote
GraphicsHypervisor
Virtual Machine
Guest OS
NVIDIA Driver
Apps
Virtual Machine
Guest OS
NVIDIA Driver
Apps
Direct GPU
access from
guest VM
Dedicated
GPU per user
NVIDIA GRID GPU
… VIRTUALIZE THE WORKSTATION
Citrix XenServerVMware ESXRed Hat Enterprise LinuxOpen source Xen, KVM
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Notebook or thin client
Datacenter
GPU-enabled server
Remote
GraphicsHypervisor
NVIDIA GRID vGPU
Hypervisor
GRID Virtual GPU Manager
Virtual Machine
Guest OS
NVIDIA Driver
Apps
Virtual Machine
Guest OS
NVIDIA Driver
Apps
Direct GPU
access from
guest VMs
Physical GPU
Management
… SHARE THE GPU
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GPU-enabled server
Hypervisor
NVIDIA GRID vGPU
Hypervisor
GRID Virtual GPU Manager
VM 2
Guest OS
NVIDIA Driver
Apps
VM 1
Guest OS
NVIDIA Driver
Apps
NVIDIA GRID VIRTUAL GPU Standard NVIDIA driver
stack in each guest VM
— API compatibility
Direct hardware access from the guest
— Highest performance
GRID Virtual GPU Manager
— Increased manageability
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GPU-enabled server
Hypervisor
NVIDIA GRID vGPU
Hypervisor
GRID Virtual GPU Manager
VM 2
Guest OS
NVIDIA Driver
Apps
VM 1
Guest OS
NVIDIA Driver
Apps
VIRTUAL GPU RESOURCE SHARING
3D CE NVENC NVDEC
FramebufferTimeshared Scheduling
Channels
VM1 FB
VM2 FB
GPU BAR VM1 BAR VM2 BAR
Frame buffer
— Allocated at VM startup
Channels
— Used to post work to the GPU
— VM accesses its channels via GPU Base Address Register (BAR), isolated by CPU’s Memory Management Unit (MMU)
GPU Engines
— Timeshared among VMs, like multiple contexts on single OS
CPU MMU
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GPU-enabled server
Hypervisor
NVIDIA GRID vGPU
Hypervisor
GRID Virtual GPU Manager
VM 2
Guest OS
NVIDIA Driver
Apps
VM 1
Guest OS
NVIDIA Driver
Apps
VIRTUAL GPU ISOLATION
FramebufferGPU MMU VM1 FB
VM2 FB
GPU MMU controls access from engines to framebufferand system memory
vGPU Manager maintainsper-VM pagetables in GPU’s framebuffer
Valid accesses are routed to framebuffer or system memory
Invalid accesses are blocked
VM1 pagetables
VM2 pagetables
Translated DMA access to
VM physical memory and FB
Pagetable access
Untranslated accesses
3D CE NVENC NVDEC
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First hypervisor to support GRID vGPU
— Also supports GPU passthrough
Open source
Full tools integration for GPU
GRID certified server platforms
XenServer
NVIDIA GRID VGPU ON CITRIX XENSERVER
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XENSERVER SETUP
Install XenServer
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XENSERVER SETUP
Install XenServer
Install XenCenter management GUI on PC
Install GRID Virtual GPU Manager
rpm -i NVIDIA-vgx-xenserver-6.2-331.30.i386.rpm
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Citrix XenCenter management GUI
Assignment of virtual GPU, or passthroughof dedicated GPU
ASSIGNING A VGPU TO A VIRTUAL MACHINE
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VM’s console accessed through XenCenter
Install NVIDIA guest vGPU driver
BOOT, INSTALL OF NVIDIA DRIVERS
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NVIDIA driver now loaded, vGPU is fully operational
Verify with NVIDIA control panel
VGPU OPERATION
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Use a high performance remote graphics stack
Tune the platform for best graphics performance
DELIVERING GREAT REMOTE GRAPHICS
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NVIDIA GRID SDK
Available on vGPU and passthrough GPU
Fast readback of desktop or individual render targets
Hardware H.264 encoder
Citrix XenDesktop
VMware View
NICE DCV
HP RGS
GRID GPU or vGPU
3D
NVENC
Framebuffer
AppsApps
Apps
Graphics
commands
NVIFR NVFBC
RenderTarget
FrontBuffer
H.264 or
raw streams
Remote Graphics Stack
Network
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Platform basics
GPU selection
NUMA considerations
TUNING THE PLATFORM
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PLATFORM BASICS
Use sufficient CPU!
— Graphically intensive apps typically need multiple cores
Ensure CPUs can reach their highest clock speeds
— Enable extended P-states / TurboBoost in the system BIOS
— Set XenServer’s frequency governor to performance mode
xenpm set-scaling-governor performance
/opt/xensource/libexec/xen-cmdline --set-xen
cpufreq=xen:performance
Use sufficient RAM! - don’t overcommit memory
Fast storage subsystem - local SSD or fast NAS / SAN
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MEASURING UTILIZATION
nvidia-smicommand line utility
Reports GPU utilization, memory usage, temperature, and much more
[root@xenserver-vgx-test2 ~]# nvidia-smi
Mon Mar 24 09:56:42 2014
+------------------------------------------------------+
| NVIDIA-SMI 331.62 Driver Version: 331.62 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GRID K1 On | 0000:04:00.0 Off | N/A |
| N/A 31C P0 20W / 31W | 530MiB / 4095MiB | 61% Default |
+-------------------------------+----------------------+----------------------+
| 1 GRID K1 On | 0000:05:00.0 Off | N/A |
| N/A 29C P0 19W / 31W | 270MiB / 4095MiB | 46% Default |
+-------------------------------+----------------------+----------------------+
| 2 GRID K1 On | 0000:06:00.0 Off | N/A |
| N/A 26C P0 15W / 31W | 270MiB / 4095MiB | 7% Default |
+-------------------------------+----------------------+----------------------+
| 3 GRID K1 On | 0000:07:00.0 Off | N/A |
| N/A 28C P0 19W / 31W | 270MiB / 4095MiB | 46% Default |
+-------------------------------+----------------------+----------------------+
| 4 GRID K1 On | 0000:86:00.0 Off | N/A |
| N/A 26C P0 19W / 31W | 270MiB / 4095MiB | 45% Default |
+-------------------------------+----------------------+----------------------+
| 5 GRID K1 On | 0000:87:00.0 Off | N/A |
| N/A 27C P0 15W / 31W | 10MiB / 4095MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 6 GRID K1 On | 0000:88:00.0 Off | N/A |
| N/A 33C P0 19W / 31W | 270MiB / 4095MiB | 53% Default |
+-------------------------------+----------------------+----------------------+
| 7 GRID K1 On | 0000:89:00.0 Off | N/A |
| N/A 32C P0 19W / 31W | 270MiB / 4095MiB | 46% Default |
+-------------------------------+----------------------+----------------------+
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MEASURING UTILIZATION
GPU utilization graph in XenCenter
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ENGINEER / DESIGNER
KNOWLEDGE WORKER
POWER USER
GRID K22 high-end Kepler GPUs3072 CUDA cores (1536 / GPU)8GB GDDR5 (4GB / GPU)
GRID K14 entry Kepler GPUs768 CUDA cores (192 / GPU)16GB DDR3 (4GB / GPU)
PICK THE RIGHT GRID GPU
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ENGINEERDESIGNER
KNOWLEDGE WORKER
POWER USER
GRID K22 high-end Kepler GPUs3072 CUDA cores (1536 / GPU)8GB GDDR5 (4GB / GPU)
GRID K200256MB framebuffer
2 heads, 1920x1200
GRID K240Q1GB framebuffer
2 heads, 2560x1600
GRID K260Q2GB framebuffer
4 heads, 2560x1600
SELECT THE RIGHT VGPU
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ENGINEERDESIGNER
KNOWLEDGE WORKER
POWER USER
GRID K22 high-end Kepler GPUs3072 CUDA cores (1536 / GPU)8GB GDDR5 (4GB / GPU)
GRID K200256MB framebuffer
2 heads, 1920x1200
GRID K240Q1GB framebuffer
2 heads, 2560x1600
GRID K260Q2GB framebuffer
4 heads, 2560x1600
SELECT THE RIGHT VGPU
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KNOWLEDGE WORKER
POWER USER
GRID K100256MB framebuffer
2 heads, 1920x1200
GRID K140Q1GB framebuffer
2 heads, 2560x1600
SELECT THE RIGHT VGPU
GRID K14 entry Kepler GPUs768 CUDA cores (192 / GPU)16GB DDR3 (4GB / GPU)
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Non-Uniform Memory Architecture
Memory and GPUs connected to each CPU
CPUs connected via proprietary interconnect
CPU/GPU access to memory on same socket is fastest
Access to memory on remote socket is slower
CPU Socket 0
Core Core
Core Core
GPU GPU
Core
Core
PCI
Express
Memory 0
CPU Socket 1
Core Core
Core Core
GPU GPU
Core
Core
PCI
Express
Memory 1
CPU
Interconnect
TAKE ACCOUNT OF NUMA
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VM pinned to CPU socket by restricting its vCPUs to run only on that socket
xe vm-param-set
uuid=<vm-uuid>
VCPUs-params:mask=
0,1,2,3,4,5
CPU Socket 0
Core Core
GPU GPU
Core
Memory 0
CPU Socket 1
Core Core
Core Core
GPU GPU
Core
Core
PCI
Express
Memory 1
Core Core CoreVirtual Machine
vCPU
vCPU
vCPU
vCPU
PIN VCPUS TO SOCKETS
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CPU Socket 0
Core Core
GRID K2 GRID K2
Core
Memory 0
CPU Socket 1
Core Core
Core Core
GRID K2 GRID K2
Core
Core
Memory 1
Core Core Core
SELECTING A VGPU ON A SPECIFIC SOCKET
GPU1
GPU2
GPU3
GPU4
GPU5
GPU6
GPU7
GPU8
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GPU Group “GRID K2”
Allocation policy: depth first
Physical GPUs:
XenServer manages physical GPUs by means of GPU groups
Default behavior: all physical GPUs of same type are placed in one GPU group
GPU group allocation policy:
— Depth first: allocate vGPU on most loaded GPU
— Breadth first: allocate vGPU on least loaded GPU
GPU GROUPS
GPU1
GPU2
GPU3
GPU4
GPU5
GPU6
GPU7
GPU8
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GPU Group “GRID K2”
Allocation policy: depth first
Physical GPUs:
XenServer manages physical GPUs by means of GPU groups
Default behavior: all physical GPUs of same type are placed in one GPU group
GPU group allocation policy:
— Depth first: allocate vGPU on most loaded GPU
— Breadth first: allocate vGPU on least loaded GPU
CPU Socket 0
Core Core
K2 K2
Core
Memory 0
CPU Socket 1
Core Core
Core Core
K2 K2
Core
Core
Memory 1
Core Core Core
GPU GROUPS
GPU1
GPU2
GPU3
GPU4
GPU5
GPU6
GPU7
GPU8
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Default GPU group takes no account of where a VM is running
Your VM may end up using a vGPU that’s allocated on a GPU on a remote CPU socket
CPU Socket 0
Core Core Core
Memory 0
CPU Socket 1
K2
Core Core Core
GPU GROUPS
Virtual Machine
vCPU
vCPU
vCPU
vCPU
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GPU Group “GRID K2 Socket 1”
Allocation policy: breadth first
Physical GPUs:
GPU Group “GRID K2 Socket 0”
Allocation policy: breadth first
Physical GPUs:
Create custom GPU groups
— Per socket, or per GPU for ultimate control
xe gpu-group-create
name-label=
"GRID K2 Socket 0”
xe pgpu-param-set
uuid=<pgpu-uuid>
gpu-group-uuid=
<group-uuid>
xe gpu-group-param-set
uuid=<group-uuid>
allocation-algorithm=
breadth-first
GPU GROUPS
GPU1
GPU2
GPU3
GPU4
GPU5
GPU6
GPU7
GPU8
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GPU Group “GRID K2 Socket 1”
Allocation policy: breadth first
Physical GPUs:
GPU Group “GRID K2 Socket 0”
Allocation policy: breadth first
Physical GPUs:
Create custom GPU groups
— Per socket, or per GPU for ultimate control
xe gpu-group-create
name-label=
"GRID K2 Socket 0”
xe pgpu-param-set
uuid=<pgpu-uuid>
gpu-group-uuid=
<group-uuid>
xe gpu-group-param-set
uuid=<group-uuid>
allocation-algorithm=
breadth-first
CPU Socket 0
Core Core
GRID K2 GRID K2
Core
CPU Socket 1
Core Core
Core Core
GRID K2 GRID K2
Core
CoreCore Core Core
GPU GROUPS
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NVIDIA's GRID Virtual GPU Architecture
GRID Virtual GPU on Citrix XenServer
Remote graphics performance
WRAP UP
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NVIDIA GRID vGPU User Guide
— Included with GRID vGPU drivers
— Visit http://www.nvidia.com/vgpu, look for driver download link
Citrix XenServer with 3D Graphics Pack
— Visit http://www.citrix.com/go/vgpu
Qualified server platforms
— Visit http://www.nvidia.com/buygrid
RESOURCES
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Remote Graphics
— Citrix XenDesktophttp://www.citrix.com/xendesktop
— HP Remote Graphics Software (RGS)http://www8.hp.com/us/en/campaigns/workstations/remote-graphics-software.html
— NICE Desktop Cloud Visualization (DCV)https://www.nice-software.com/products/dcv
XenServer CPU performance tuning
— http://www.xenserver.org/partners/developing-products-for-xenserver/19-dev-help/138-xs-dev-perf-turbo.html
RESOURCES
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THANK YOU!
NVIDIA GRID Forum
https://gridforums.nvidia.com/
@NVIDIAGRID