Nvidia tries to link cloud with graphics processors

Nvidia's latest graphics processors based on Kepler will accelerate virtualization and reduce reliance on CPU

Nvidia on Tuesday announced technologies that could make its upcoming Tesla graphics processors more accessible to cloud deployments in enterprises, while also reversing a trend of relegating highly parallel chips to specialized math and scientific calculations.

The company announced new Tesla graphics processors with hardware and software hooks that allow the chips to be self-sufficient in deploying virtual machines and executing programs. Analysts said the new technologies could open the floodgates for cloud deployments through servers with virtualized graphics processors, which will rely less on components such as CPUs for task execution.

Graphics processors are generally considered faster than CPUs, which are more relevant for everyday tasks such as productivity applications. A larger number of servers are now harnessing the parallel-processing capabilities of CPUs and GPUs to scale performance, especially in supercomputing. The world's second-fastest supercomputer, the Tianhe-1A system at the National Supercomputer Center in Tianjin, China, uses Nvidia's Tesla GPUs and Intel's Xeon processors to deliver 2.5 petaflops of performance.

The new graphics processors include the Tesla K10, which has started shipping, and the Tesla K20, which will ship in the fourth quarter. The new chips are based on the Kepler architecture, and are faster and more power-efficient than the older Fermi architecture, which was considered power hungry by design. Chip prices were not available.

Nvidia has added to Kepler a new virtualization technology called VGX, which virtualizes the GPU and makes it a resource that can be shared by multiple CPUs and threads, said Jeff Brown, general manager of the professional solutions group at Nvidia. Nvidia has built a memory management unit into the GPU, ensuring a straightforward deployment of a virtual machine.

GPUs have in the past been used for virtualization. For example, Nvidia and its rival Advanced Micro Devices have offered professional graphics cards for deployment of Windows 7 virtual desktop from servers to client devices. But with VGX, now the GPU can skip CPU cycles and directly deploy and manage virtual machines.

The new virtualization technology has interesting implications in server designs and the deployment of cloud services to thin clients and devices like tablets, said Dean McCarron, principal analyst at Mercury Research.

"We can see some shifting going on. For one, GPUs haven't shown up in the server environment outside the high-performance computing space." McCarron said. "It opens the door for playing very complex, visually detailed games on a thin-client."

The new technology also makes it easier and inexpensive to add GPUs to general server environments, McCarron said. For example, a server-side virtualized GPU will be able to able to render a high-definition game and deliver it over the cloud while take advantage of GPU acceleration features.

"Now you can start doing some interesting things with your workload in terms of a client-server architecture," McCarron said.

The VGX architecture removes a couple of major bottlenecks that kept hybrid -- CPU and GPU --- systems from achieving maximum power and performance efficiency, said Dan Olds, principal analyst at Gabriel Consulting Group.

"After these changes are implemented fully, users will see much higher CPU, GPU, and thus overall system utilization, which makes the already compelling hybrid computing story even stronger," Olds said.

A VGX hypervisor is connected to hypervisors from Citrix or VMware, and graphics boards are being developed based on VGX that can be plugged into PCI-Express 3.0 slots. Server makers including Dell, Hewlett-Packard, IBM and Cisco are adopting the new VGX technology, Nvidia's Brown said.

Multiple workloads require GPUs in servers to execute programs more efficiently. Nvidia has introduced new technology called HybridQ to improve the parallelism and utilization of GPUs, said Sumit Gupta, senior director for the Tesla Business Unit.

The GPU helps execute multiple tasks simultaneously and more efficiently through a hardware scheduler, which ensures the GPU can prioritize and execute tasks more efficiently instead of looping back to the CPU, Gupta said.

"As soon as you start going back to the CPU too much, you lose the benefit of the GPU," Gupta said.

A part of CPU design involves a scheduler that makes sure the workload and its branches get handled correctly. That kind of capability wasn't present in parallel processing units, and Nvidia's implementation of HybridQ will scale GPU performance, Mercury Research's McCarron said.

The GPU already a lot of capabilities of the CPU, and the HybridQ will bring them closer in features, McCarron said. Rather than having specially tuned software, HybridQ will scale the number of workloads virtualized GPUs handle, McCarron said.

The HybridQ technology can be applied to a number of tasks that include computational fluid dynamic, bioinformatics, genome sequencing and circuit simulation, Gupta said. Programmers don't have to make changes in code to benefit from the HybridQ technology and the technology is compatible with Nvidia's CUDA framework, which enables programmers to write highly parallel programs.

HybridQ will come with the Tesla K20, which is targeted at high-end servers and will become available in the fourth quarter.

Agam Shah covers PCs, tablets, servers, chips and semiconductors for IDG News Service. Follow Agam on Twitter at @agamsh. Agam's e-mail address is agam_shah@idg.com

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Agam Shah

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Jack Jeffries


As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr


The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Aysha Strobbe

Microsoft Office 365/HP Spectre x360

Microsoft Office continues to make a student’s life that little bit easier by offering reliable, easy to use, time-saving functionality, while continuing to develop new features that further enhance what is already a formidable collection of applications

Michael Hargreaves

Microsoft Office 365/Dell XPS 15 2-in-1

I’d recommend a Dell XPS 15 2-in-1 and the new Windows 10 to anyone who needs to get serious work done (before you kick back on your couch with your favourite Netflix show.)

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?