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

Father’s Day Gift Guide

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

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.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?