From the other room, I overheard a conversation between two of my teenage sons: “What if you could plug your brain into a supercomputer …” said one, “… and have it design a game from your mind?” finished the other. In nearly perfect unison, they agreed: “That would be so cool!”
I wondered if I should tell them about the Cell architecture—not just the advanced microprocessor but also the concept for a pervasive distributed platform whose building block has been called a “supercomputer on a chip.” Thats the claim being made by the interesting trio of IBM, Sony and Toshiba.
To look at the prospects of something such as Cell requires neither a microscope nor a telescope but rather a kaleidoscope. The key to Cells success wont be found in the submicroscopic wizardry that packs 234 million transistors into 221 square millimeters, soon to shrink further from 90-nanometer to 65-nm technology. It wont be found in the long-range trends of bandwidth that will make it affordable for Cell machines to talk with one another on a worldwide scale.
As my former colleague Dave Methvin once observed, “Its not whether machines can talk to each other; its whether they have anything to say.” Distributed processing has to be more than a worldwide multigigahertz gabble of “Are you there?” “Yes, Im here; are you there?” And so on. The Cell proposition, over and above the raw performance of the processor and network alone, therefore depends on kaleidoscopic alignment of component technologies—both hard and soft—in a way that actually shows us something new.
I dont want to understate Cells raw strengths. One thing that makes Cells success more plausible is its high off-chip bandwidth. Distributed-processing skeptics have been scoring points with arguments such as, “Why would I send data to other processors to share the work? By the time I move the data off the chip and back again, Id have done better to do the job myself on a single, fast multicore chip.” Past chip architectures have mustered a weak response. Cells bandwidth to off-chip memory, on the order of 100GB per second, puts more of the burden of proof on the skeptics.
So will Cell machines be able to share immersive virtual-world environments with real-time multiplayer interactions? Or handle supply chain optimization and other enterprise tasks on a massive scale? Undoubtedly. The question, though, is whether Cell-based programmers will soon see the kind of programming tools that will let enterprise developers describe their bolder visions in executable terms. Cells diverse types of processor core, like those of Sonys Emotion Engine, offer a powerful palette to the game designer—but are novel territory even for early adopters of enterprise grids and developers of the tools to use them.
Cell Chip Architecture Wont Sell Without Tools – Page 2
Unless the need for breakthrough development tools can be met, Cells ambitions may seem as far ahead of the mainstream in the 2020s as similar visions were in the 1970s—when science fiction writers started to talk in concrete terms about worldwide distributed computing. As the canonical example of that fictional literature, I recommend Thomas Ryans “The Adolescence of P-1,” whose machine-intelligence title character conveniently evolved from an adaptive worm designed to seize storage while evading detection.
Today, when we say that a software system “wasnt designed—it just grew,” thats not a term of praise. Enterprise buyers arent attracted to systems that work as well as a human mind but are at least as poorly specified in terms of exactly what theyll do in any given situation. Go ahead, try to survive a HIPAA or a Sarbanes-Oxley audit with an architecture diagram of a cloud labeled, “Here the miracle occurs.”
Its important, then, to see Cells quantum jumps in processing power and collaborative computing matched by equal breakthroughs in software specification, verification and quality-of-service assurance. Without that achievement, Cells differences may not make an overwhelming difference.
The still-plummeting costs of more conventional processors, combined with the installed base of skills and tools to use them, pave the way for bit-based business as usual. I look forward, therefore, to seeing the tools that will be introduced to sell Cell.
Technology Editor Peter Coffee can be reached at [email protected].
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