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ls65536

627 karmajoined 6 лет назад

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So You Want to Work in Hardware

ourancientfuture.substack.com
1 points·by ls65536·4 месяца назад·0 comments

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ls65536
·14 минут назад·discuss
There's an agreement to do something about leap seconds before 2035, either by allowing DUT1 to exceed its currently specified bounds (this is most likely) or by agreeing to simply not insert/delete leap seconds going forward (this is less likely). For certain bounds on DUT1 and at some timescale, these would be practically the same in terms of their effects on civilization, computing, etc. In any case, a decision will almost certainly be made much sooner than 2035, perhaps even before the next leap second insertion/deletion would need to take place under the present rules.
ls65536
·24 минуты назад·discuss
Fortunately, in the past couple months, the likelihood of actually needing a negative leap second in the next few years has been trending down. This is based on measurements and predictions done by the IERS, the data for which they publish weekly in their Bulletin A [0]. I've been tracking this data for a while, and their DUT1 predictions have been trending more negative over the past few months, suggesting that the anticipated negative leap second is likely to be delayed, or it may very well not happen at all.

[0] https://datacenter.iers.org/data/latestVersion/bulletinA.txt
ls65536
·2 месяца назад·discuss
I have a machine that's on a Debian installation that I've been steadily upgrading, one Debian stable release at a time, since I originally installed it about a decade ago now. At one point I even copied the entire installation to another disk (just a "dd" from its original SATA SSD to a new NVMe one, plus some partition and filesystem resizing), and I've upgraded the CPU/motherboard/RAM at another time, and it just keeps going reliably. It's fun knowing that the origin of that Debian installation predates every hardware component it's presently running on (with the exception of only the case and power supply).
ls65536
·2 месяца назад·discuss
They bought P.A. Semi, but it was for their design capability; they never had fabs anyway, and Apple still depends on TSMC and others for manufacturing chips. Apple building fabs to ensure a guaranteed supply of memory (or logic) chips would be an unprecedented level of vertical integration, even for them.
ls65536
·3 месяца назад·discuss
I made something similar a long time ago partly as a challenge to see what could be done with just 2 KB RAM [0]. It was possible to implement some very basic context switching between two "processes", pipes (okay, I only had a single pipe, and it only worked between certain commands), and some other things like a few built-in games (pong, snake, and a breakout-style game, naturally). I didn't go as far as adding any filesystem functionality though, and ultimately yours does feel more Unix-like overall, but it was a fun little project where you learned to always consider every single byte as precious.

[0] https://github.com/ls4096/avrsysh
ls65536
·3 месяца назад·discuss
~450 square feet, with how many feet in the third dimension? You probably had an order of magnitude more volume than 330 cubic feet there.
ls65536
·5 месяцев назад·discuss
This is really fun!

A possible bug though: I managed to finish Inverness to Gibraltar, and the top three spots on the leaderboard somehow had negative time durations!
ls65536
·6 месяцев назад·discuss
My intuition would be that constant usage (not exceeding maximum rated capacity/thermals/etc.) should generally result in less wear compared to the more frequent thermal cycling that you might expect from intermittent use, but maybe there's something else going on here too. I suppose this would depend on what exactly the cause of the failure is.

Either way, these are obviously being intentionally sold to be used for non-gaming-type workloads, so it wouldn't be a good argument to state that they're just being (ab)used beyond what they were inteded for...unless somehow they really are being pushed beyond design limits, but given the cost of these things I can't imagine anyone doing this willingly with a whole fleet of them.
ls65536
·6 месяцев назад·discuss
But if everyone follows this advice, then everything just gets overwhelmed by "hustlers" (and their "shameless spam"), and collectively we're now all worse off because of it. It just turns into yet another tragedy of the commons situation.

I say this as someone who received a lot of great feedback and had some interesting interactions after posting about a project of mine using "Show HN" a few years ago. I didn't need to spam anything to get the attention, but I admit maybe I just got very lucky, or maybe there were just fewer posts to "compete" with at the time (this was before the recent write-everything-with-AI-and-launch-it-out-there craze).

Finally, I'm not making any moral judgments here, and if someone feels they need to do this to get the attention they want, then who am I to tell you otherwise. But we should be aware of what we're giving up when we overall tend to behave in such a way, even if it's the inevitable outcome.
ls65536
·7 месяцев назад·discuss
The total size isn't what matters in this case but rather the total number of files/directories that need to be traversed (and their file sizes summed).
ls65536
·8 месяцев назад·discuss
> I've seen claims of providers putting IPv6 behind NAT, so don't think full IPv6 acceptance will solve this problem.

I get annoyed even when what's offered is a single /64 prefix (rather than something like a /56 or even /60), but putting IPv6 behind NAT is just ridiculous.
ls65536
·9 месяцев назад·discuss
If that's really the case, I wish they would just come out and say it and spare the rest of us the burden of trying to debate such a decision on its technical merits. (Of course, I am aware that they owe me nothing here.)

Assuming this theory is true then, what other GPLv3-licensed "core" software in the distro could be next on their list?
ls65536
·9 месяцев назад·discuss
Maybe the thought is that there will be more pressure now on getting all the tests to pass given the larger install base? It isn't a great way to push out software, but it's certainly a way to provide motivation. I'm personally more interested in whether the ultimate decision will be to leave these as the default coreutils implementation in the next Ubuntu LTS release version (26.04) or if they will switch back (and for what reason).
ls65536
·9 месяцев назад·discuss
I can certainly understand it for something like sudo or for other tools where the attack surface is larger and certain security-critical interactions are happening, but in this case it really seems like a questionable tradeoff, where the benefits in this specific case are abstract (theoretically no more possibility of any memory-safety bugs) but the costs are very concrete (incompatibility issues; and possibly other, new, non-memory-safety bugs being introduced with new code).

EDIT: Just to be clear, I'm otherwise perfectly happy that these experiments are being done, and we should all be better off for it and learn something as a result. Obviously somebody has assessed that this tradeoff has at least a decent probability of being a net positive here in some timeframe, and if others are unhappy about it then I suppose they're welcome to install another implementation of coreutils, or use a different distro, or write their own, or whatever.
ls65536
·10 месяцев назад·discuss
I'm not going to speculate about what might be ahead in regards to Oracle's forecasting of data center demand, but regarding the idea of efficiency gains leading to lower demand, don't you think something like Jevons paradox might apply here?