klelatti

60 ms·

631.
by klelatti 4y ago
Something can be both technically incredibly impressive, genuinely useful and yet at the same dramatically over-hyped. That may be the case for AI today although the range of possible outcomes makes the latter point genuinely unclear. The d
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Captain Zilog Crushed! The Story of the Z8000(thechipletter.substack.com)
3 points by klelatti 4y ago|0 comments
633.
by klelatti 4y ago
> So big.LITTLE is therefore about shipping a "CISC" and "RISC" core on the same piece of silicon really. You're mixing up ISA and implementation. To the extent that RISC / CISC has any meaning at all any mo
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by klelatti 4y ago
> They are simpler to decode and execute, which is nice if you're making a small, cheap core aiming at low power consumption. Yes and there is an interesting corollary that it makes a big.LITTLE type arrangement more effective.
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by klelatti 4y ago
Just to add my thanks too! Especially the point about control tasks - brought a new perspective for me.
636.
by klelatti 4y ago
Agreed. I think it's hard so see a new ISA getting much traction now unless it clearly offers a very significant power / performance benefit and that seems unlikely at the moment. I blogged that RISC-V might be the last mainstream
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by klelatti 4y ago
More recently doesn't the AMD AVX 512 implementation do this too? [1] There is very little truly new! [1] https://www.phoronix.com/review/amd-zen4-avx512
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by klelatti 4y ago
That makes a lot of sense. Thanks again for sharing such an interesting project.
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by klelatti 4y ago
It's not huge but it's not irrelevant either. Plus I think its probably an understatement (being from an x86 vendor). I agree that the focus on ISA is often a bit overdone just not that it's something we can ignore.
640.
by klelatti 4y ago
> And, and I can tell you that we got pretty far along with an internal Arm design, and it was very, very clear that you if you’re delivering a certain level of performance, the delta in power driven by the ISA is like 5 percent. [1] Pow
641.
by klelatti 4y ago
Thanks so much! Looks like a really great project. I'll have a full look through the blog later but just the summary of the code density results is very interesting (at http://retroramblings.net/?p=1414 ). Do you have a
642.
by klelatti 4y ago
That’s a really interesting question (on code density) - can you share your conclusions or even your project?
643.
by klelatti 4y ago
Hi Ken, Thanks for a great post as usual. I forgot HN can mess up titles - hopefully fixed now!
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Inside the 8086 processor's instruction prefetch circuitry(righto.com)
127 points by klelatti 4y ago|39 comments
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by klelatti 4y ago
> keep part of Apple’s branding I made no comment about actual performance.
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by klelatti 4y ago
> I think the marketing of performance has always been a subthread. Exactly the point I made.
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by klelatti 4y ago
Hmmm, performance has been a key part of Apple’s branding for decades from Power PC (don’t disagree with your point on G4 though) through Intel in the MacBook Pro and Mac Pro and now on iPhones and M series Macs. Edit - this is a comment ab
648.
by klelatti 4y ago
For the foreseeable future the development costs of the Mac Pro will be a rounding error on Apple's P&L. More of an issue now and in the coming years is bandwidth to do work on low volume products. They may be happy to spend the mo
649.
by klelatti 4y ago
Just looking at the economics of the Mac Pro based on sales of the machine itself doesn't quite capture the full picture. An Apple Silicon Mac Pro could have many roles: - A flagship product that demonstrates just how powerful Apple Si
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by klelatti 4y ago
Thanks!
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by klelatti 4y ago
Looks good. What's the Wordpress theme you're using?
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by klelatti 4y ago
You might like ‘The node is nonsense’ on this topic and especially what sensible metrics might replace nm. https://read.nxtbook.com/ieee/spectrum/spectrum_na_august_20...
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by klelatti 4y ago
So you’re saying that someone at the centre should judge that this is a great store and then make sure that it is run in a certain way? Can you see how this completely contradicts the approach - leaving aside the fact it’s a sample size of
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by klelatti 4y ago
Part of the challenge of this approach is that not every store will either be well run or meet aspirations of those who go to bookstores for a particular experience. Some will do very badly! Others will be successful but unattractive. But o
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by klelatti 4y ago
Good piece but it omits some relevant points. - James Daunt is now CEO of both B&N and Waterstones in the UK. Waterstones is a sizeable business in its own right with over 300 stores and totally dominates high street bookselling in the
656.
by klelatti 4y ago
> This leads to a selection more tailored to the local market, and more conservatively chosen – not in the political sense, but in the sense of what will sell vs. what publishers hope to make sell by placement. I know what you’re trying
657.
by klelatti 4y ago
Would you like to expand on why you think Lua is a bad choice for this particular project and what you would have used instead. That would be much more helpful than a generic attack on the language itself.
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Ventana RISC-V CPUs Beating Next Generation Intel Sapphire Rapids(semianalysis.com)
31 points by klelatti 4y ago|1 comments
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by klelatti 4y ago
You’re right but the point is that Intel was very interested. If you’re relying on cores from firms that are attractive to SoC / device makers then there is no guarantee those cores will continue to be available post acquisition.
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by klelatti 4y ago
Completely agree with this and with your other comments in this thread. There simply isn't that much money in designing cores. The money is in selling SoCs or devices. Arm at least has made increasingly high quality cores available at

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