Supercomputer On-a-Chip Prototype Unveiled
An anonymous reader writes "Researchers at University of Maryland have developed a prototype of what may be the next generation of personal computers. The new technology is based on parallel processing on a single chip and is 'capable of computing speeds up to 100 times faster than current desktops.' The prototype 'uses rich algorithmic theory to address the practical problem of building an easy-to-program multicore computer.' Readers can win $500 in cash and write their names in the history of computer science by naming the new technology."
We have microcomputers and supercomputers and nothing in between? Seems to be a bit of hyperbole involved here.
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Oh, for god's sake. I don't understand why this is getting so much press. It was stupid when it went up on Digg, and it's stupid that it's showing up here. This isn't substantially different from any of the other parallel architecture and programming work that's been going on for the last two decades. Their benchmarks are against embarrassingly parallelizable algorithms like matrix multiplies and randomized quicksort, things that any half-intelligent lemur (with a math and cs class or two) could get to run quickly. The hard part is speeding up your average desktop application which, I guarantee you, is not spending the majority of its time doing matrix multiplies.
On top of that, their "parallel extension of von Neumann" amounts to adding primitives to start and stop threads into the language. Again, any half-intelligent lemur (with a slightly different skill set from the first) could have done that. And I think a few actually have (at the risk of comparing language researchers to lemurs). It doesn't solve the underlying problem.
Oh, and did we mention no floating point and the lack of any memory bandwidth to get data into and out of this thing?
This is over-hyped research and shameless self-promotion, and for some weird reason the press seems to be buying it. Stop it.
While I agree there are certain leaps to be made before this can be a mass market item, I disagree fundamentally with point 1 that you make. You could have made the exact argument about the old DOS Lotus office suite way back, 15 years ago. Those things still word process, and a 386 33MHz is certainly no slouch - I never had to sat around waiting for the software to respond to me or finish some ridiculously long task.
I'm sure you'd agree that these newfangled Pentiums and Core Duos are quite useful, even for the end user.
Think about features like predictive and contextual actions. Desktop search? Search-as-you-type? There are many ways to improve the usability of computers thyat require more and more performance. Honestly, if we can invent faster computers, we will invent ways to put the power to use in a productive, tangible way.
Babywulf Cluster
Oh great, I can hear the PR advertisements already; "Put a SOC in it".
I'm going to make an assumption and say that you don't do a lot of system programming. Threaded applications depend... heavily... on synchronizing data access. You simply can't take a single threaded application and break it out across threads without having some context of how it's accessing it's data and why. Imagine landing planes at an airport. It's a serial process... you just can't arbitrarily run it in parallel... "bad things" (tm) happen. The "algorithms" Mr. Vishkin is speaking of have no way of determining the context of code being executed and trying to break it out is a disaster waiting to happen.
There are applications where massive parallelism like this is fantastic... using my initial example... encoding video. Throw each frame off to one of the processors and you're processing 300 at a time (even there there are limitations because each frame requires information from the previous).
But I stand my statement.. anyone who says they can take a serial application and run it in parallel is full of sh*t and they know it. In certain, limited circumstances, yes... but in general. NO.
Here's the deal.
Up 'til now, Parallel Random Access Model (PRAM) computing has been a theory of parallel processing that was a thought model. It hadn't been built. Some people had written programs to emulate a PRAM computer but they were not complete versions.
It could work at a snail's pace and still be a technological accomplishment as it is the very first, complete, working, hardware PRAM computer. It's on par with the Z3, Colossus and Eniac, the first programmable computers (German, English, American, in historical order).
Fortunately, they made the algorithms work well, or at least, if the press release it to be believed, work so that 64 75Mhz computers could produce 100x the performance of a current desktop on at least one particular function. Which is pretty impressive in first-time hardware even if it turns out to be an obscurely used math function known only to about a dozen coders.
I've been on slashdot so long I'm starting to get out of touch with the cool stuff if it ain't on slashdot.
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