Symmetry

64 ms·

811.
by Symmetry 4y ago
It was more that leakage current (i.e. thermal issues) and velocity saturation suddenly becoming constraints on how much you could increase switching speed along with the difficulty of high frequency clock distribution. Your individual tra
812.
by Symmetry 4y ago
Phone makers spend a lot of time worrying about power. But because your screen and cell radio take up a minimum amount of power there's a level of diminishing returns in optimizing the application cores beyond a certain point.
813.
by Symmetry 4y ago
It wasn't really a matter of twisting. The phrase "Moore's Law" got coined in an interview at the same 1975 conference where Dennard presented on his scaling laws and has never referred just to the first periodic doubli
814.
by Symmetry 4y ago
In particular, the Space Shuttle looked like it could nuke Moscow from the south where there weren't any early warning radars pointed.
815.
by Symmetry 4y ago
In fairness to the Soviets, a lot of the design of the Shuttle was constrained by requirements the Air Force put in for military purposes so that they'd contribute to the expense too. Except they backed out after the design was finali
816.
by Symmetry 4y ago
I have no idea what you were saying by "Causation frequently removes correlations that would otherwise exist" then.
817.
by Symmetry 4y ago
That's the thing though. A heater controlled by a thermostat will considerably reduce the correlation between outside and inside temperature but because it's imperfect it wont' eliminate it entirely.
818.
by Symmetry 4y ago
I don't think that's right? In theory you could have A and B that were naturally correlated and add a causal relationship between the two that exactly canceled that correlation but that would be infinity unlikely to happen by cha
819.
by Symmetry 4y ago
I like the phrasing, "Correlation correlates with causation because causation causes correlations".
820.
by Symmetry 4y ago
The Cape Wind project, which was going to be the US's first offshore wind farm, was famously killed by wealthy and powerful people worried about their views with environmental causes as a pretext. I think that bureaucratic review coul
821.
by Symmetry 4y ago
I don't think I'd put it that way. For the average NIMBY their friends and social circle are often suffering or benefiting from the same projects as them and from the inside it feels more like protecting their community than prot
822.
by Symmetry 4y ago
I don't think anybody doubts that the first superspreader event happened at the Hunan market. The question is whether the first human/animal crossover happened there. With a high k disease like Covid-19 you might very well hav
823.
by Symmetry 4y ago
Late binding polymorphism and encapsulation are both very important concepts but there's no particular reason that your unit of inheritance should be your unit of polymorphism, often the boundaries should be drawn differently. And inh
824.
by Symmetry 4y ago
I guess being long and thin they don't violate the square/cube laws that normally keep bacteria from getting too big given that they have to use their outer walls rather than mitochondria to respirate. Still very impressive.
825.
by Symmetry 4y ago
Those have got glial cells to help support the parts far from the nucleus. Plus they're in a cooperative multicellar environment, not off by their lonesome.
826.
What's wrong with wanting a “human in the loop”?(warontherocks.com)
75 points by Symmetry 4y ago|84 comments
827.
by Symmetry 4y ago
The US is a big outlier in not having universal healthcare but in terms of government control it's really pretty typical with countries like the UK where the government runs health provision directly rather than just regulating and p
828.
by Symmetry 4y ago
“The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.” Sadly, the people who do the most to change the world are often
829.
by Symmetry 4y ago
I'd also say that while this is a major problem and ought to be fixed, streamlining the process from the perspective of the people applying is probably going to require both political will and spending more on city administration.
830.
by Symmetry 4y ago
Reminds me of the book The Mystery of Capital by Hernando de Soto which was a look at how in many countries capitalism only exists for the rich while the poor, without social connections and bribe money, don't have access to things l
831.
by Symmetry 4y ago
Clock speeds stopped increasing exponentially in the mid 2000s[1]. Transistor density keeps increasing exponentially. Power per operation keeps decreasing exponentially. Marginal cost per transistor keeps decreasing exponentially. Cost to b
832.
by Symmetry 4y ago
See also the Real World Tech analysis for a bit more depth. https://www.realworldtech.com/intel-4/
833.
by Symmetry 4y ago
I did my MEng, in part, on analyzing data dependent power usage in adders and I'm sort of embarrassed I didn't think of this.
834.
by Symmetry 4y ago
Yes, mostly. It was essentially a Transmeta Efficeon with some facilities to run ARM code natively the first time through in case it wasn't going to be re-used.
835.
by Symmetry 4y ago
Yeah. Normally sophisticated software scheduling works great on DSP-like tasks where the memory access patterns are very predictable but suffer a lot where you tend to have unexpected cache misses that a deep OoO system could just paper ov
836.
by Symmetry 4y ago
They were going to have their cores be able to run both ARM and x86 binaries but IIRC patent issues with Intel prevented them from doing both so they just went with ARM. Whether you need the x86 patents to run have a Transmeta style proces
837.
by Symmetry 4y ago
The advantages of chopping up chopping your pipeline stages in half so that each is 10 FO4s long rather than the 16 FO4s most people use. You've generally got 2 FO4s of latching and 2 of clock skew so IBM was seeing 6 FO4s of useful w
838.
by Symmetry 4y ago
It isn't bound by the pipeline length. Even without pipelining at all, with poisoning you can do a faulting load into a register and then just mark the value in the register as poisoned. As you perform operations with the value any r
839.
by Symmetry 4y ago
Yeah. I wonder if its a classic VLIW or if the pipeline is exposed and/or skewed. exposed : The results of operations that take more than one clock cycle don't necessarily appear at their destination the cycle after the instruct
840.
by Symmetry 4y ago
I wonder how they manage that? It's straightforward to do if a page fault represents an error that halts the execution of a thread but not if you need to be able to keep going after the OS reads in the data from the hard drive. That

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