ISSCC Poulson Preview Online

Article: New Itanium Microarchitecture at ISSCC 2011
By: David Kanter (dkanter.delete@this.realworldtech.com), November 17, 2010 12:21 pm
Room: Moderated Discussions
Matt Waldhauer (M.Waldhauer@gmx.de) on 11/17/10 wrote:
---------------------------
>Thanks for your nice speculative article.
>
>What do you think about the idea that Poulson might employ >reliable computing by
>issueing the same instructions twice to different execution >units?

That's quite possible, and I've heard that idea before. I didn't quite have as much time to write this article as I wanted, but that was one of the two topics I wanted to dig into (that I couldn't), along with how the multi-threading might work.

Anyway, multi-threading for reliability is a great way to protect your combinatorial logic (and intermediate latches) against random errors. However, you still need to protect your register files and caches against errors, and deal with whole core failures. Right now, combinatorial logic isn't a big deal - but it is something people need to think about going forward, so this would be more of a 'forward looking' idea.

David
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ISSCC Poulson Preview OnlineDavid Kanter2010/11/17 03:40 AM
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