Featured Research

from universities, journals, and other organizations

Supercomputer warfare: New research provides effective battle planning

Date:
November 11, 2010
Source:
University of Warwick
Summary:
New research from the UK, to be presented at the world’s largest supercomputing conference, pits China’s new No. 1 supercomputer against alternative US designs. The work provides crucial new analysis that will benefit the battle plans of both sides, in an escalating war between two competing technologies.

New research from the University of Warwick, to be presented at the World's largest supercomputing conference next week, pits China's new No. 1 supercomputer against alternative US designs. The work provides crucial new analysis that will benefit the battle plans of both sides, in an escalating war between two competing technologies.

Related Articles


Professor Stephen Jarvis, Royal Society Industry Fellow at the University of Warwick's Department of Computer Science, will tell some of the 15,000 delegates in New Orleans next week, how general-purpose GPU (GPGPU) designs used in China's 2.5 Petaflops Tianhe-1A fare against alternative supercomputing designs employed in the US; these use relatively simpler processing cores brought together in parallel by highly-effective and scalable interconnects, as seen in the IBM BlueGene architectures.

Professor Jarvis says that: "The 'Should I buy GPGPUs or BlueGene' debate ticks all the boxes for a good fight. No one is quite sure of the design that is going to get us to Exascale computing, the next milestone in 21st-century computing, one quintillion floating-point operations per second (10^18). It's not simply an architectural decision either -- you could run a small town on the power required to run one of these supercomputers and even if you plump for a design and power the thing up, programming it is currently impossible."

Professor Jarvis' research uses mathematical models, benchmarking and simulation to determine the likely performance of these future computing designs at scale:

"At Supercomputing in New Orleans we directly compare GPGPU designs with that of the BlueGene. If you are investing billions of Dollars or Yuan in supercomputing programmes, then it is worth standing back and calculating what designs might realistically get you to Exascale, and once you have that design, mitigating for the known risks -- power, resilience and programmability."

Professor Jarvis' paper uses mathematical modeling to highlight some of the biggest challenges in the supercomputing war. The first of these is a massive programming/engineering gap, where even the best computer programmers are struggling to use even a small fraction of the computing power that the latest supercomputing designs have and, which will continue to be a problem without significant innovation. Professor Jarvis says:

"if your application fits, then GPGPU solutions will outgun BlueGene designs on peak performance" -- but he also illustrates potential pitfalls in this approach -- "the Tianhe-1A has a theoretical peak performance of 4.7 Petaflops, yet our best programming code-based measures can only deliver 2.5 Petaflops of that peak, that's a lot of unused computer that you are powering. Contrast this with the Dawn BlueGene/P at Lawrence Livermore National Laboratory in the US, it's a small machine at 0.5 Petaflops peak [performance], but it delivers 0.415 Petaflops of that peak. In many ways this is not surprising, as our current programming models are designed around CPUs."

But the story doesn't end there. "The BlueGene design is not without its own problems. In our paper we show that BlueGenes can require many more processing elements than a GPU-based system to do the same work. Many of our scientific algorithms -- the recipes for doing the calculations -- just do not scale to this degree, so unless we invest in this area we are just going to end up with fantastic machines that we can not use."

Another key problem identified by the University of Warwick research is the fact that in the rush to use excitingly powerful GPGPUs, researchers have not yet put sufficient energy into devising the best technologies to actually link them together in parallel at massive scales.

Professor Jarvis' modeling found that small GPU-based systems solved problems between 3 and 7 times faster than traditional CPU-based designs. However he also found that as you increased the number of processing elements linked together, the performance of the GPU-based systems improved at a much slower rate than the BlueGene-style machines.

Professor Jarvis concludes that: "Given the crossroads at which supercomputing stands, and the national pride at stake in achieving Exascale, this design battle will continue to be hotly contested. It will also need the best modeling techniques that the community can provide to discern good design from bad."

The paper, to be presented on Nov. 15, is entitled 'Performance Analysis of a Hybrid MPI/CUDA Implementation of the NAS-LU Benchmark' and is by S.J. Pennycook, S.D. Hammond, G.R. Mudalige and S.A. Jarvis (all of whom were at the University of Warwick's Department of Computer Science when this work was undertaken). The paper will be presented in the technical track of SC 10, at the Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computing Systems (PMBS 10).


Story Source:

The above story is based on materials provided by University of Warwick. Note: Materials may be edited for content and length.


Cite This Page:

University of Warwick. "Supercomputer warfare: New research provides effective battle planning." ScienceDaily. ScienceDaily, 11 November 2010. <www.sciencedaily.com/releases/2010/11/101111120925.htm>.
University of Warwick. (2010, November 11). Supercomputer warfare: New research provides effective battle planning. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2010/11/101111120925.htm
University of Warwick. "Supercomputer warfare: New research provides effective battle planning." ScienceDaily. www.sciencedaily.com/releases/2010/11/101111120925.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

European Parliament Might Call For Google's Break-Up

European Parliament Might Call For Google's Break-Up

Newsy (Nov. 22, 2014) This is the latest development in an antitrust investigation accusing Google of unfairly prioritizing own products and services in search results. Video provided by Newsy
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
Is Nintendo Making A Comeback With 'Super Smash Bros.'?

Is Nintendo Making A Comeback With 'Super Smash Bros.'?

Newsy (Nov. 21, 2014) Nintendo released new "Super Smash Bros." Friday, and it's getting great reviews. Could this mean a comeback for the gaming company? Video provided by Newsy
Powered by NewsLook.com
NSA Director: China Can Damage US Power Grid

NSA Director: China Can Damage US Power Grid

AP (Nov. 20, 2014) China and "one or two" other countries are capable of mounting cyberattacks that would shut down the electric grid and other critical systems in parts of the United States, according to Adm. Michael Rogers, director of the National Security Agency and hea Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins