Northwest Arkansas Democrat-Gazette

U.S. gets speediest computer

- STEVE LOHR

Not so fast, China. The United States just won back bragging rights in the global supercompu­ter race.

For the past five years, China has had the world’s fastest computer, a striking symbolic achievemen­t that highlighte­d the nation’s hightech ambitions and progress.

But the United States has regained the lead thanks to a new supercompu­ter built for the Oak Ridge National Laboratory in Tennessee by IBM in a partnershi­p with Nvidia. The speedy performanc­e of the machine, called Summit, was announced Friday.

“We’re seeing the U.S. back on top again,” said Jack Dongarra, a computer scienA

● tist at the University of Tennessee who tracks supercompu­ter speeds and rankings.

The Chinese government’s aggressive push to become the leader in technologi­es like artificial intelligen­ce, microchips and cellular networks has ignited a rivalry with the United States, the traditiona­l frontrunne­r in the digital realm. For years, American companies have accused China of stealing their intellectu­al property, and lawmakers have said that some Chinese companies, including ZTE and Huawei, pose a national security risk.

The Summit computer, which cost $200 million to build, is not just fast — it is also at the forefront of a new generation of supercompu­ters that embrace technologi­es at the center of the friction between the United States and China. The machines are adding artificial intelligen­ce and the ability to handle vast amounts of data to traditiona­l supercompu­ter technology to tackle the most daunting computing challenges in science, industry and national security.

The numbers used to describe supercompu­ter speeds are, well, super — as beyond human comprehens­ion as the machines’ performanc­e is beyond human capability.

Summit can do mathematic­al calculatio­ns at the rate of 200 quadrillio­n per second, or 200 petaflops. A person doing one calculatio­n a second would have to live for more than 63 billion years to match what the machine can do in a second.

Stupefying? Dongarra offered another analogy: The University of Tennessee football stadium seats about 100,000 people. If it was full, and everyone in it had a modern laptop, it would take 20 stadiums full of similarly equipped people to match the computing firepower of the Summit.

Supercompu­ters now perform tasks that include simulating nuclear tests, predicting climate trends, finding oil deposits and cracking encryption codes. Scientists say that further gains and fresh discoverie­s in fields like medicine, new materials and energy technology will rely on the approach that Summit embodies.

“These are big data and artificial intelligen­ce machines,” said John E. Kelly, who oversees IBM Research. “That’s where the future lies.”

The global supercompu­ter rankings have been compiled for more than two decades by a small team of computer scientists, led by Dongarra, who put together a Top 500 list. The newest list will not be released until later this month, but Dongarra said he had no doubt the new machine is the fastest.

At 200 petaflops, Summit achieves more than twice the speed of the leading supercompu­ter in use last November, when the last Top 500 list was published. That machine is at China’s National Supercompu­ting Center in Wuxi.

Summit is made up of rows of black, refrigerat­orsize units that weigh a total of 340 tons and are housed in a 9,250 square-foot room. The machine is powered by 9,216 central processing chips and 27,648 graphics processors that are lashed together with 185 miles of fiber-optic cable.

Cooling Summit requires 4,000 gallons of water a minute, and the supercompu­ter consumes enough electricit­y to light up 8,100 American homes.

While impressive, Summit can be seen as a placeholde­r. Supercompu­ters that are five times faster — 1,000 petaflops, or an exaflop — are in the works. The Energy Department last month closed the window for bids on three such so-called exascale supercompu­ters to be built over the next three years. There have been cuts elsewhere in the department, but the budget for its advanced computing program is being increased by 39 percent in the two fiscal years ending September 2019, said Paul Dabarr, the Energy Department’s undersecre­tary for science.

“We’re doing this to help drive innovation in supercompu­ting and beyond,” Dabarr said.

Yet China, Japan and Europe all have exascale projects underway. The U.S. lead, scientists say, could be short-lived.

At Oak Ridge, Thomas Zacharia, the lab director, cites a large health research project as an example of the future of supercompu­ting. Summit has begun ingesting and processing data generated by the Million Veteran Program. Begun in 2011, the Department of Veterans Affairs project is enlisting volunteers to give researcher­s access to all of their health records, contribute blood tests for genetic analysis, and answer survey questions about their lifestyles and habits. To date, 675,000 veterans have joined; the goal is to reach 1 million by 2021.

The eventual insights, Zacharia said, could “help us find new ways to treat our veterans and contribute to the whole area of precision medicine.”

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