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extropy

774 karma · joined August 20, 2013

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extropy··on When “idle” isn't idle: how a Linux kernel optimization became a QUIC bug
Is it just me, or the article structure and subtitles feel very AI?
extropy··on Phoenix: A modern X server written from scratch in Zig
Thanks for linking Arcan, looks interesting.

After a quick scan, Arcan seems to be pushing a microkernel approach, with some clients providing display server capabilities and others talking to them via shared memory. This will have the same problem as all other microkernels - nice for research, but the extra completely outweights the marginal benefits over a monolithic thing that generally has a smaller API surface to maintain.

extropy··on Phoenix: A modern X server written from scratch in Zig
Wayland design choices are heavily influenced by automotive and TV where it has been industry standard way before it became mostly usable as a desktop. And that has lead to design compromises that look odd on desktop.

But hey, you can probably run automotive UIs with your desktop compositor.

And Gnome devs are just being silly at this point.

extropy··on Contrails Map
I'm not following the logic why contrails cause net warming.

Why nuclear blasts - that also introduce lots of particles in atmosphere cause a cooling effect - "nuclear winter"?

extropy··on Is it possible to allow sideloading and keep users safe?
This is what Chrome OS does, works pretty well IMHO.
extropy··on QUIC for the kernel
The NAT firewalls do not like P2P UDP traffic. Majoritoy of the routers lack the smarts to passtrough QUIC correctly, they need to treat it the same as TCP essentially.
extropy··on NASA announces Boeing Starliner crew will return on SpaceX Crew-9
Possible. Depends how the contract is structured, they may be able to claw back some money from Aerojet.

Boeing still takes all the blame.

extropy··on The Linux kernel has been accidentally hardcoded to a maximum of 8 cores
The minimum run time of a tread before it's potentially preempted when load is high is computed based on number of cores available giving more time when there are more cores since rescheduling latency is apparently longer with more cores.

And the function that does this uses the same value for 8 and more cores.

So the performance impact is likely <<1%.

extropy··on Every single Onewheel is being recalled after four deaths
Bicycles fail safe unless a wheel falls off or both brakes fail simultaneously.

Balancing onewheelers - if the control or power system fails, you immediately go down, hard. And since the cruising position is weight shifted forwards, it's 100% nose dive.

extropy··on Germany Will Force 80% of Gas Stations to Install EV Charging, Too
There is a significant overap - fuel up, find the restroom, grab some snacks.

EV chargers have the benefits of being cheap, take little space, and permitting is raesonably simple. Expecting them to be way more widespread than fuel stations ever can be.

extropy··on AMD Open-Source GPU Kernel Driver Above 5M Lines, Entire Linux Kernel at 34.8M
That GPU firmware is generally just a blob that has never been open sourced. The driver is the part that talks to the GPU, not the OS that runs inside the GPU. Unless I'm mistaken in which case this would be a huge deal.
extropy··on I almost bought a scanner
I suspect the part that is failing is not the connector itself, but rather a controller chip somewhere upstream.

Given the skills you could def DIY repair it for cheaper, the high price is likely including uncertainty of what's broken and some form of warranty.

extropy··on Negative-weight single-source shortest paths in near-linear time
For most use cases shortest path is super simple and fast problem on modern PCs. So might be useful on extra large synthetic networks. Neural nets?, Trading logs?, Image processing?

Also negative weights are rare in real life applications. And def not in what you would consider normal path planning.

extropy··on “Copycat” layoffs won’t help tech companies or their employees
This. Also the bigger the company is, the less the long term loyalty and people are generally there for the money.

So top performers will get moving quickly.

extropy··on The UK is wasting a lot of wind power
Opportunity to generate cheap hydrogen?
extropy··on Twitter has re-suspended ElonJet account
Let me argue from the other end. The incident happened, which is obv not good.

What where the causes? How can we prevent this from happening again? What do other high profile perons do to prevent this from happening?

extropy··on 100G-LR4 optic cable teardown
That sounds very wrong. Not a physicist, but light does not interact with magnets, or you need to get into the superconducting strength levels before it does.

https://en.m.wikipedia.org/wiki/Optical_rotation

It seems the optical rotation happens due to molecular structure of specific materials.

Edit, found this: https://en.wikipedia.org/wiki/Faraday_effect

So a specific material plus magnetic field is needed. But still not sure how strong of a field is sufficient.

extropy··on Driving Amazon’s electric delivery vehicle: Rivian EDV [video]
DOS programs loaded fast, since there was around 1MB of working memory. Granted they did not do much, but where responsive, except when needed to do real compute, then you just waited forever.

Windows 3x/9x with first real multitasking and swap - things got quite sluggish. Early browsers were particularly eager of gulping ram and bringing everything to halt.

Nowdays it feels somewhere in the middle with copious amounts of ram stuff can be fast once up and running, but it seems every app either wants to load from web on every step or tries to index your drive on every keypress.

extropy··on Audio CD ripping – optical drive accuracy listing
The accuracy figures in TA are kinda low - 99.7 for the top one, averaging out at 98.5%.

Anyone has some idea what is this measuring?

Bit accuracy (way too low)? A full disk read 100% error free? The actual accuracy really depends on the quality of the disc, is this measured with a reference disc?

extropy··on Audio CD ripping – optical drive accuracy listing
I think GP means prefect or nothing - it errors out if not able to get a valid read.

Regular error correction + checksum is a pretty solid implementation of that.

extropy··on 3D OpenStreetMap
Tried ground elevation, seems to be broken.

All buildings started floating hundreds of meters above the still flat terrain.

extropy··on RejoinEU – About UK to rejoin EU possibility (aka Reverse Brexit)
And switch to metric units while we're at it.
extropy··on GitHub Copilot, with “public code” blocked, emits my copyrighted code
I still remember the days when we hand billion dollar lawsuits over 20 lines of code (Oracle vs Google).

If CoPilot makes everyone see how ridiculous that is, that's a win in my book.

extropy··on SimulaVR Has Been Subpoenaed by Meta Platforms, Inc
The subpoena is issued by a judge for a pending case, you can either fight it by submitting an opposing motion or be held in contempt of court which in this case is pretty much a loss.
extropy··on C++20 coroutines: “The bug is in the C++ standard, not GCC.” (2020)
Sure, here is your Lego set. But do not put while bricks next to red ones or it will explode!
extropy··on ‘Everyone will get snatched off the street’: mobilisation brings war home
USA hopefully learned their lesson (over the several proxy wars). Now will Russia?

Yes Putin is the dictator, but the problem started when the people allowed him to become one. Now his "strongman" ethos does not allow him anything but push on. Trump would probably do similar things given time. Buy US was sane enough to push him out when they still could.

Also I think it's somewhat human nature to go help the side you sympathize with when an conflict occurs. We just need to learn to be more civilized about this, throwing army at the problem has very poor track record.

extropy··on German digital signage ban prompts confusion
Are you sure all plants get to sell at spot price?

Doesn't that encourage collusion to generate artificial scarcity - all participants benefit from it?

extropy··on More energy on less land: The drive to shrink solar’s footprint
This used to be true for cheap panels. Better panels would have bypass diodes for every cell (the 10x10 cm square) and would only loose the output of the affected cell.
extropy··on Win32 Is the Only Stable ABI on Linux?
Wine is more like a re-implementation of windows Userland using a different kernel (and graphics libraries).

Since the hardware is all the same, there is nothing to emulate or compile.

Or from the other direction - windows NT contains a re-implementation of the win16 API. Is that an emulator?

extropy··on Win32 Is the Only Stable ABI on Linux?
By that logic any modern windows is an emulator of win32, since that is not a kernel API but a user space library "emulating" it.

Exactly the same way as wine. Wine does not translate the calls, it for most part actually implements the underlying logic.

Win32 is just a bunch of shared libraries: https://en.wikipedia.org/wiki/Microsoft_Windows_library_file...

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