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mat_epice

370 karma · joined October 7, 2022

You can email me.

The account name is hn.

The domain is fastmail.fm.

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mat_epice··on Amber: Programming language compiled to Bash
Perl is not quite as universally installed as you claim, especially in containers.
mat_epice··on Release of Fugaku-LLM – a large language model trained on supercomputer Fugaku
The system uses 30MW, but this job used a portion of it that would consume 2.6MW.

There isn't really a figure for how much compute time it takes to train this thing, but 8x H100s have 32PF of AI compute among them. This job had 2,100 (half precision[1]) PF-in-fugaku / 158,956 nodes-in-fugaku * 13,824 nodes-in-job = 182 PF-in-job, implying it can get the job done 5.6x faster, or a little over ten days at the most optimistic.

Electricity costs for these nodes for ten days looks fairly similar to the rental costs of 8xH100s for 60 days according to my research. Lambda labs seems to have very cheap instances for 8xH100, but AWS and its ilk are much higher. However, the comparison is a little weird, as Fugaku is also a few years old now, and the contemporary GPU at the time of its release was the A100 (1/13th of an H100). The next Fujitsu chip may well narrow the power/performance gap between itself and (say) Blackwell or whatever is current at the time.

[1] https://www.fujitsu.com/global/about/innovation/fugaku/speci...

mat_epice··on Meta takes $40K, holds our business ransom
Dispute the charge with Amex, like you probably should have done at first sign of trouble. You can do this even after paying the bill.
mat_epice··on I was infected with Zika to test a vaccine
I’ve just come to realize from this article that human challenge trials are really a form of trolley problem [1]. Is it more ethical to “do nothing” and gather data from infections in the wild, where many people are potentially harmed, or do you “throw the switch” and infect a much smaller number deliberately to get high quality data?

[1] https://en.m.wikipedia.org/wiki/Trolley_problem

mat_epice··on Nextdoor's Heisensubscribe (and Other Dark Patterns)
Weekly emails are too frequent?

Tell that to Gap, who sometimes sends up to five spams per day.

mat_epice··on Your AI Girlfriend Is a Data-Harvesting Horror Show
Nine times out of ten it's an electric razor, but every once in a while, it's an AI Girlfriend. Of course it's company policy never to imply ownership in the event of an AI Girlfriend. Always use the indefinite article an AI Girlfriend, never your AI Girlfriend.
mat_epice··on Explore interesting places nearby listed on Wikipedia
This has been a feature in the Wikipedia mobile app for some time. It’s a real gem, I’ve found out some really interesting things about landmarks I pass every day.
mat_epice··on Gnuplotlib: A gnuplot-based plotting backend for NumPy
HN rules say: “… please use the original title, unless it is misleading or linkbait; don't editorialize.”

Therefore, the title should be “gnuplot for numpy.”

mat_epice··on Generals.io – Capture enemy generals to defeat them
If the GP wanted to hide it, it’s a pretty strange thing to explicitly unhide it.
mat_epice··on The Art of Electronics (2015)
105 errata (pretty small ones) in a 1000-page book. For highly technical work, I'd say that's not too bad. Looking at the errata for Vol I of TAOCP, there's a lot more for a much shorter work (600 pages).
mat_epice··on HP raising Instant Ink subscription pricing significantly
I print to my Brother MFC-L8900CDW from my iphone all the time, works flawlessly. Not a cheap printer, though, as you point out.
mat_epice··on California regulators vote to keep Diablo Canyon nuclear plant open 5 more years
That is of course true, but not the argument I was refuting.
mat_epice··on California regulators vote to keep Diablo Canyon nuclear plant open 5 more years
Citation required. You cannot replace Diablo Canyon with $6B of solar and batteries.

Installing your proposed $4B of solar will get you 4GW at peak, which will produce about 5840 GWh per year due to variations in sunlight over the days and seasons. Diablo Canyon produces 18,000 GWh per year. Replacing Diablo Canyon with solar will cost $12B plus batteries, maintenance, and operations staff.

Figures/Sources:

- $1m buys 1MW of solar panels that provides 1,460 MWh per year. https://coldwellsolar.com/commercial-solar-blog/how-much-inv...

- Diablo Canyon produces 18,000 GWh per year. https://diablocanyonpanel.org/history-of-dcpp/

mat_epice··on A chess TUI implementation
It also lets you play an engine (stockfish) running on your phone. I play offline on planes all the time.
mat_epice··on A chess TUI implementation
It’s just a distribution mechanism that users like. The page details other ways to install, including native methods. The container is at the top just because it will be the first thing many people will want to try.
mat_epice··on Aspirin 81 (2019)
The article says you are correct, but the original dose is 325mg instead of 300 or 350 because the dose is 5 grains.
mat_epice··on Is distributed computing dying, or just fading into the background?
This article suffers from a bad vocabulary collision. Distributed computing existed long before SETI@home, and will continue to exist as long as there isn’t just one computer doing everything.

“Volunteer computing” is probably a better way to refer to this phenomenon.

mat_epice··on Intel Itanium IA-64 Support Removed with the Linux 6.7 Kernel
I think they way they do this is they post a message to lkml with a “speak now or forever hold your peace” message. I think they won’t remove functionality if anyone has a credible use.

If you’re ever on funky hardware and want to ensure continuing Linux compatibility, I guess it pays to subscribe.

mat_epice··on Cosmopolitan Third Edition
Binary size was a lot more of a problem before customers had to buy 8-16 GB of RAM to run a web browser.
mat_epice··on Apple unveils M3, M3 Pro, and M3 Max
The point was that there is rarely a reason to not run ARM images, since they’re widely available.

If I’m running M3 images on my Ryzen, performance is gonna be horrible, but why would I?

mat_epice··on 18-year-old built a computer monitor that doesn't strain your eyes
My Dell laptop had one, which was very poorly done. Sitting in a dimly lit room, I would catch it self adjusting every several seconds. I ended up disabling it.
mat_epice··on Ensō: write now, edit later
I'm with you, although any writing I do is technical. I find that immediately micro-editing the fragment/sentence/paragraph I just wrote is easier than coming back as a separate step. Maybe it's because my first cut is so bad!
mat_epice··on Samsung announces 'Shinebolt' HBM3E memory
Indeed, it probably has one.
mat_epice··on "We have a thermal printer hooked up to the internet, you can send us a doodle"
iOS didn't exist on the 20th century web, so... ;)
mat_epice··on Summary of “The Procrastination Equation”
As a bit of a meta conversation, I'm a bit torn over book summaries as articles.

I've suffered through many books that had a very good message, but should have been 20% as long as they were. Much repetition in every possible spot, just to end up with a book of a respectable length that people don't feel bad spending $15 on. Comprehensive summaries are a great way to get around that.

On the other hand, these summaries are (by definition) derivative works that serve almost entirely as just distillations of the book. There's some opinion rolled in, but the description of the source material goes far beyond a book review to the point that it could be seen as a time- and money-saving replacement. If I were an author, I wouldn't be happy that my book was interpreted by a random third party, let alone that many folks will assume they got the value from the work and won't buy it.

mat_epice··on The SR-71 Blackbird Astro-Nav System worked by tracking the stars
ICBMs have used celestial guidance since the 50s. https://airandspace.si.edu/collection-objects/snark-guidance...
mat_epice··on Airlines make more money from mileage programs than from flying planes
Many government-type travelers are obligated to go with the cheapest airfare that’s reasonable. I know folks who take 5:30am Delta flights so they can get loyalty benefits while obeying those rules, but these new spending levels makes gaining status that way impractical.
mat_epice··on Turning a keyboard into a mouse with Libevdev
Mouse keys is a specific technology that uses the numpad arrow keys to move the mouse pointer, just like in the video. You can see more about it here: https://support.microsoft.com/en-us/windows/use-mouse-keys-t...
mat_epice··on Dining like Darwin: When scientists swallow their subjects (2015)
One theory with a lot of evidence behind it is that he was a combination of lactose intolerant and depressed.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1743237/pdf/v08...

mat_epice··on Linux 6.5
This is just a mirror of the official list, AFAIK.
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