SC13: GPUs would make terrific network monitors

An off-the-shelf Nvidia GPU is able to easily capture all the traffic of a 10Gbps network, Fermilab research finds

A network researcher at the U.S. Department of Energy's Fermi National Accelerator Laboratory has found a potential new use for graphics processing units -- capturing data about network traffic in real time.

GPU-based network monitors could be uniquely qualified to keep pace with all the traffic flowing through networks running at 10Gbps (gigabits per second) or more, said Fermilab's Wenji Wu.

Wenji presented his work as part of a poster series of new research at the SC 2013 supercomputing conference this week in Denver.

Network analysis tools face an extreme challenge in keeping up with all of the traffic of today's larger networks, he said. Adding to the strain, network administrators increasingly expect to inspect operational data in real-time, as it is happening.

For processing, today's commercial monitoring appliances typically rely on either standard x86 processors or customer ASICs (application specific integrated circuits).

Both architectures have their limitations, Wenji noted. CPUs don't have the memory bandwidth or the compute power to keep pace with the largest networks in real time. As a result, they can drop packets.

ASICs can have sufficient memory bandwidth and compute power for the task, but their custom architecture is difficult, and expensive, to program. Nor do they offer the ability to split processing duties into parallel tasks, which is becoming increasingly necessary for watching high-speed networks.

GPUs can offer all of these capabilities, Wenji said. They have "a great parallel execution model," he said, noting that they offer high memory bandwidth, easy programmability, and can split the packet capturing process across multiple cores.

As their name implies, GPUs were originally designed to render graphics on computer screens. Their architectures, consisting of many processor cores working in tandem, also make them useful as general coprocessors good at inherently parallelizable tasks.

In the latest Top500 ranking of the world's most powerful supercomputers, 38 machines used Nvidia GPUs to boost their output.

The task of monitoring networks requires reading all the data packets as they cross the network, which "requires a lot of data parallelism," Wenji said.

Wenji has built a prototype at Fermilab to demonstrate the feasibility of a GPU-based network monitor, using a Nvidia M2070 GPU and an off-the-shelf NIC (network interface card) to capture network traffic. The system could easily be expanded with additional GPUs, he said.

In this setup, Wenji found that packet processing could be considerably accelerated through GPUs. Compared to a single core CPU-based network monitor, the GPU-based system was able to speed performance by as much as 17 times. Compared to a six core CPU, the speed up from using a GPU was threefold.

Makers of commercial network appliances could use GPUs to boost their devices' line rates, as well as cut development costs by using pre-existing GPU programming models such as the Nvidia CUDA (Compute Unified Device Architecture) framework, Wenji said.

Joab Jackson covers enterprise software and general technology breaking news for The IDG News Service. Follow Joab on Twitter at @Joab_Jackson. Joab's e-mail address is Joab_Jackson@idg.com

Join the newsletter!

Or

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.

Tags processorshardware systemsnvidiaComponentsConfiguration / maintenanceGraphics boardsHigh performance

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Joab Jackson

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Jack Jeffries

MSI GS75

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

MSI PS63

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

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?