Feeds

Merced hotter, harder slower

Gives opposition real chance…

  • alert
  • submit to reddit

5 things you didn’t know about cloud backup

Letter from architect A scientist who has taken time out to read Intel's IA-64 material is concluding that the processor may well be a pup. The boffin, who has supplied his name and address to The Register, is concluding that Intel may have a real problem persuading the world+dog that its IA-64 architecture is a goer. He said: "Like many other computer architecture techno-junkies I downloaded Intel's IA-64 instruction set document. As a scientist, I'm fascinated; the most informative experiments are those that fail to produce the predicted results. "But from an engineering point of view it's pretty bad. My fairly confident prediction: instead of Merced being a poor start which will be triumphantly reversed by later models, IA-64 CPUs will remain slower, hotter and much harder to build than CPUs using simpler instruction sets. Only if that competition evaporates completely, and Intel still feel the need to move on from x86, will IA-64 succeed. Oddly, nobody seems to be saying that in public. "IA-64 is a bizarre portmanteau of ideas - some, individually, quite good - with little sense of overall direction. The design committee obviously found it easier to add ideas than to keep them out. "Its complexity has delayed it for at least a year. Even Microprocessor Report (big Intel fans) suggest the new features will deliver no better than a 20% performance increase over a simple (eg Alpha/MIPS) RISC; but you need at least 40% to justify an extra year in development. "History suggests that the compiler support IA-64 performance depends on won't happen. In any case CPU application loads are increasingly going to be interpreted code - even if its not Java - and it would be hard to imagine any CPU more hostile to 'just-in-time' and other interpretation tricks. "Particularly bizarre are several features from the "tried that, didn't work" category, including: only one addressing mode for load/store (AM29K); hardware register windows (Sparc, Pyramid). "And there's the dog that didn't bark. All current, competitive, high-performance processors are register-renaming out-of-order (RR/OOO) machines where the hardware schedules instruction flow. "IA-64 was conceived at a time when the first painful attempts at RR/OOO had left many shell-shocked project casualties determined that there must be a better way. But there wasn't. IA-64, born at the wrong time, is hostile to RR/OOO technology. It nicely replays the late 80's challenge of pipelining the x86 instruction set. "Locally catastrophic is that IA-64's x86 emulation is not in a separate unit (as the Register predicted, and as a wiser architect would have done it) but spread thinly across the whole machine. It seems unlikely that an IA-64 machine will come close to equalling the performance/MHz of Pentium-Pro's many descendants - and that surely is a key feature for success. "PS: If I ran Intel, I'd have a backroom team building an RR/OOO implementation of a simple MIPS/Alpha-style 64-bit RISC instruction set with a (perhaps entirely separate) Pentium-III on the same die, sharing second-level cache and memory. Launching such a thing would be bad for loyal partner HP, but easily justified - amid floods of tears - by the need to rescue those committed to the late and disappointing IA64 CPUs." ®

5 things you didn’t know about cloud backup

More from The Register

next story
BBC: We're going to slip CODING into kids' TV
Pureed-carrot-in-ice cream C++ surprise
6 Obvious Reasons Why Facebook Will Ban This Article (Thank God)
Clampdown on clickbait ... and El Reg is OK with this
Twitter: La la la, we have not heard of any NUDE JLaw, Upton SELFIES
If there are any on our site it is not our fault as we are not a PUBLISHER
Facebook, Google and Instagram 'worse than drugs' says Miley Cyrus
Italian boffins agree with popette's theory that haters are the real wrecking balls
Sit tight, fanbois. Apple's '$400' wearable release slips into early 2015
Sources: time to put in plenty of clock-watching for' iWatch
Facebook to let stalkers unearth buried posts with mobe search
Prepare to HAUNT your pal's back catalogue
Ex-IBM CEO John Akers dies at 79
An era disrupted by the advent of the PC
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?