IBM's Bright Idea for Supercomputers
December 9, 2007 1:39 PM
comment(s) - last by
IBM's new optical interconnect may shape the future of supercomputers -- and all the other ones, too
A growing issue involved with the new gamut of multi-core processors, from dual-core to
and beyond, is shuttling data between the cores themselves. Problems arise as the bleeding edge of electrical and thermal physics are pushed by the vanishing space between transistors and now between cores. IBM may have something of a solution for this, they recently announced, in the form of an optical coupler.
Due to the wholly unfair restrictions of physics, there is only so much information that can be sent through copper interconnects. Heat and leakage both contribute to this, as smaller structures are much more prone to self-destruction caused by thermal disintegration and interference from their neighbors in the silicon sea.
Light, it turns out, doesn't have much of an issue with either. IBM thinks it will provide a means to safely connect the growing number of cores being packed onto a single chip.
The optical modulator, known as a Mach-Zehnder elctro-optic modulator, is actually much simpler than it sounds. If you're familiar with Digital Light Processing (DLP) television technology, you already understand the basics. In IBM's modulator, a laser is focused on the device, which is also connected to the copper side of the data bus. Rather than working on a reflection-based technology like DLP, the modulator simply uses the electrical binary to operate a shutter-type mechanism to turn the input laser into pulses. The pulses are then sent along a waveguide to a receiver, and translated back into electrical signal.
The modulator's waveguide structure, as well as the size of the device are both limited by the wavelength of light used. IBM's current generation coupler has a 500nm waveguide, and the device itself is a mere 200 micrometers long, half the wavelength of the laser's light. This makes it easily small enough to fit between current generation multi-core processor cores.
The device is many times more efficient than current bus technology. IBM bills speeds at 100 to 1,000 times faster than electrical, with energy consumption of 50 milliwatts or less. The theoretical speed of the interconnects could virtually eliminate anything similar to an information bottleneck as we know it now. And as any student of science can tell you, less power results in less heat, which means less power wasted as well.
The device, as IBM sees it, will in time allow the power of a supercomputer on a chip that feels at home in a laptop. Reduced heat production and electrical costs will not only benefit laptops and other micro-devices, but businesses with giant servers as well. Less space and less heat equates to less money spent on maintaining expensive climate controlled server environments.
The technology is nowhere near ready for integration, unfortunately. IBM projects a 10 to 15 year development for the system. Eventually, rather than the racks full of dual and multi-core processors sported by supercomputers like
, we could see a computer many times more powerful housed in something the size of a current mid-tower ATX case.
This article is over a month old, voting and posting comments is disabled
12/9/2007 5:28:14 PM
No mater how much the circuits may shrink, so that we can have that supercomputer in a box, needs will always be there for massive machines.
When we get a Petaflop on the desktop, or even in our phones, the TRUE supercomputers will be many thousands, or millions, of times faster still, and far bigger.
"I modded down, down, down, and the flames went higher." -- Sven Olsen
IBM Lands Atop Supercomputer List, Again
November 13, 2007, 9:03 AM
Pricing Phenom: AMD's 2.4 GHz Almost Here
November 6, 2007, 7:54 AM
Intel Slates "Nehalem" for Q4 2008
October 26, 2007, 10:58 AM
4/16/2014 Hardware Reviews
April 16, 2014, 9:01 AM
Quick Note: Kingston's 1 TB USB Stick Hits $899 on Lightning Deal
April 15, 2014, 3:35 PM
4/15/2014 Hardware Reviews
April 15, 2014, 11:30 AM
4/11/2014 Hardware Reviews
April 11, 2014, 11:03 AM
Global PC Shipments Declined 1.7 Percent in Q1 2014
April 10, 2014, 9:58 AM
Intel Previews Devil's Canyon Chip, "Black Book", and Broadwell
March 21, 2014, 8:15 AM
Most Popular Articles
Cities to Carpoolers: Sharing Your Car is Illegal, We Will Seize Your Cars
April 4, 2014, 9:17 PM
iPad Exploiter is Freed by Federal Appeals Court
April 11, 2014, 7:40 PM
A-10 Warthog May Live to Fight Another Day with Support from Lawmakers
April 14, 2014, 9:41 AM
Taiwan's AOU Claims to Have World's Highest-Res. OLED Smartphone Display
April 11, 2014, 1:44 PM
EFF: NSA May Have Used IRC Botnets to Exploit Heartbleed for Last Two Years
April 14, 2014, 4:43 PM
Latest Blog Posts
Facebook Aims to Provide Internet to "Every Person in the World" with Drones, Satellites
Apr 1, 2014, 10:20 AM
Retail Mobile Sites Experience Outages in Light of Simplexity's Bankruptcy
Mar 14, 2014, 8:48 AM
Tesla vs. BMW: Who Has the Safer EV?
Feb 1, 2014, 2:56 PM
Justice Leaks Details of Next HTC One Two Flagship Phone
Dec 5, 2013, 4:04 PM
Global Cyber Espionage Concerns Reveal Growing Cyber Armies
Nov 29, 2013, 11:04 AM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information