Green500 list ranks most energy-efficient supercomputers

Virginia Tech professors set to reveal energy needs of machines on latest Top500 List

The world's top supercomputers may be performance powerhouses, but they're also energy hogs, often using enough power to light up a small city.

Such power consumption prompted two professors at the Virginia Polytechnic Institute and State University to come up with a way to commend companies that build energy-efficient supercomputers. Kirk Cameron and Wu Feng, both associate professors in the university's computer science department, are preparing to release the Green500 List of the most energy-efficient supercomputer installations in the world.

"The list is meant to encourage people to develop systems that use power efficiently," said Cameron. "If you do that, you decrease costs, which are really high -- between US$800,000 and $1 million a year per megawatt. It's ridiculously expensive. You're looking at US$1 million to $4 million a year, easily, to run a mega system."

The Green500 List is a rating of the energy efficiency of machines that make the Top500 List of supercomputers, a ranking of the most powerful supercomputers in the world. The 30th installment of the biannual Top500 List is slated to be issued on November 14 at the Supercomputing Conference in Nevada.

The Green500 List is expected to be released just a few days after the Top500 List, giving the researchers time to rank any newcomers.

Cameron said he and Feng have put together a make-shift green list for the past few years, but it only rated some of the supercomputers ranked on the Top500 List, and then only rated them by their peak performance numbers.

This year's list, he said, really marks its official coming out, with its attempt to rank every machine on the Top500 List. They have asked users of the Top500 machines to provide measurements based on a standard workload. Cameron explained that they hope to receive detailed information from about 100 of the supercomputers -- calculating energy consumption, heat output and efficiency using the power the machine is consuming.

Machines at user sites that don't provide the requested data will be measured by peak performance numbers. Researchers will give preference to the supercomputers that they have working data on, according to Cameron.

So, which supercomputers do the researchers find tend to be more efficient?

Cameron said the machines that use blade servers tend to be much more energy efficient than machines that cluster a bunch of servers together. He noted that the Earth Simulator, a NEC vector supercomputer being run in Japan, uses a lot of energy, producing 5.12 MFLOPS per watt. IBM's BlueGene supercomputer, which currently sits at the head of the Top500 List, does not use blades but still produces a more efficient 187.79 MFLOPS per watt.

"I think companies will start to focus on more efficient machines because if you want to get more performance, it has to be more efficient," said Cameron. "If not, it's self-limiting. You can't build a machine that needs its own power plant... Being green may just be a popular term that may fade, but energy efficiency is good business. And that should have meaning to an IT manager. Two machines can have the same performance, but if one uses half the power, then choosing that one is a business decision."

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

Sharon Gaudin

Computerworld
Show Comments

Cool Tech

Toys for Boys

Family Friendly

Stocking Stuffer

SmartLens - Clip on Phone Camera Lens Set of 3

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

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!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?