jabl

60 ms·

781.
by jabl 4y ago
I work in HPC, and while security isn't an issue for your typical simulation code, correctness certainly is. Spending a million CPU hours on a supercomputer computing junk because memory unsafely caused the simulation to corrupt itself
782.
by jabl 4y ago
Not sure it was that smart? If you were into gaming, the 64 was cheaper and equally good, since very few games took advantage of the 128 mode. For better than 64 gaming, Amiga was a vastly more capable platform although it was a few years u
783.
by jabl 4y ago
Came here to say exactly that. In particular, the episodes that deal with lofting (24 & 25): https://www.youtube.com/watch?v=oKJagvumvCI&list=PLB00JHoTw1...
784.
by jabl 4y ago
It's not like this is some document that's going to be downloaded a billion times, so whether it's distributed via bittorrent or some government document site isn't going to matter. That is, the cost comes from somebody
785.
by jabl 4y ago
Wrt lock design, IIRC Linus writing something along that every time they optimize throughput by getting rid of fairness they have to come back and add fairness later on. That doesn't mean that both fairness and throughput are incompati
786.
by jabl 4y ago
Don't zero trust architectures often require secure boot as well as a functioning TPM-like secure enclave to do attestation on the client device before allowing the user to logon to some resource?
787.
by jabl 4y ago
> I don't fully understand the need or benefit of having free_sized() available tbh. It's a performance optimization. Allocator implementations spend quite a lot of time in free() matching the provided pointer to the correct si
788.
by jabl 4y ago
> it's important to keep push the industry forward The 'scamming gullible people' industry, you mean? > this could be an experimental space ship Dude, this thing is supposed to do a maximum of 5 knots on the surface of
789.
by jabl 4y ago
Yes, but that displacement troller has a hull shaped like, well, a proper boat (or ship). I doubt the troller would be making significant forward speed against storm wind and seas if it was wider than it was long, like this abomination. It&
790.
by jabl 4y ago
I was thinking specifically of the 'add with shift' instructions in the Zba extension (sh[123]add[.w] they seems to be called) vs. using separate shift + add instructions from the C extension and hope the CPU frontend will fuse th
791.
by jabl 4y ago
Also, ships, particularly sailing ships/boats, have hull forms with significantly less drag in the direction they're trying to go, vs sideways. This things, shaped like a giant tortoise with those massive (presumably rigid ) flipp
792.
by jabl 4y ago
> It does not help the largest implementations, that favor having a lot of small ops flying There's lots of O(N^2) structures on a OoO chip to support in-flight operations, so if you can fuse ops (or have an ISA that provides common
793.
by jabl 4y ago
https://arxiv.org/abs/1607.02318 is a widely cited paper that argues that simple and orthogonal ISA's are preferable, as fusion can fix up those common cases like more complicated addressing modes that other ISA&#
794.
by jabl 4y ago
> CUPS is still great but mostly because it's initial implementation was so straightforward. It's existence today is mostly maintenance-mode with a priority for fixing Mac bugs, which is understandable but also occludes the pos
795.
by jabl 4y ago
> It is good for both party, not just for upstream. Indeed. Maybe, then, it's the corporations who should have a think about requiring a CLA?
796.
by jabl 4y ago
I meant FOSS as in "Free and Open Source Software". Which I would interpret as software licensed under FOSS-compatible licenses, while at the same time not making any statement wrt subscribing to FSF or RMS politics (or RMS opini
797.
by jabl 4y ago
> If big boys take out the funding from key projects, meaning stop paying their employees to contribute, everything would crumble. What's your point? If Microsoft goes bankrupt, the MS ecosystem would crumble. And so on, ad infinitu
798.
by jabl 4y ago
Nah, FOSS is going stronger than ever. But just as before, it's the ones that are playing the 'commodify your complement' game that are winning, while those that think that FOSS by itself is a business model are struggling.
799.
by jabl 4y ago
Wasn't safety critical DoD projects (like military avionics projects) required to be implemented in Ada at some point. But at some point that requirement was rescinded and Ada all but died. Seems nowadays Ada is more alive in Europe, m
800.
by jabl 4y ago
Isn't much FOD ingestion due to the wheels kicking up something? If so, mounting the engines in the back seems like a bad idea, as even if they are higher up than an under wing mounting there's a risk that the wheels might kick up
801.
by jabl 4y ago
Yes, ETOPS ratings have been extended as engines have gotten more reliable. Another factor is that we have learned to make bigger engines as well. So nowadays with two engines you can power a pretty big plane. And due to how turbine efficie
802.
by jabl 4y ago
Horizontal stabilizers above the rudder went away with the engines mounted on the body in the back, the reason for the high tail was to keep the elevators away from the jet blast of the engines. As to why create a design like that in the fi
803.
by jabl 4y ago
I did look into a number of these minimal MTA's, reading a few blog posts etc. before deciding on dma. A couple of neat features: - Reads aliases from /etc/aliases like the Flying Spaghetti Monster intended. - Limited (very l
804.
by jabl 4y ago
Guess it's some leftover from ye olde days when machines were multiuser things, lovingly cared for by sysadmins. In such a world, might make sense to have local mail delivery on each host.
805.
by jabl 4y ago
> In hindsight, one can wonder why it's not the default behavior everywhere. Nowadays most Linux distros don't install any MTA by default. Which I think is an entirely valid choice, considering home users, laptop warriors etc.
806.
by jabl 4y ago
Really hard to imagine Arm would be so adamant about running its own business into the ground. Requiring Arm designed IP to go together with an Arm core in a SoC would destroy a large part of the Arm ecosystem. Whatever the truth may be, th
807.
by jabl 4y ago
I've been using dma for some Linux servers in a simple 'smart host only' configuration (that is, all mail is forwarded to some central 'real' MTA), mostly in order to deliver mails from cron. As the commit message n
808.
by jabl 4y ago
AFAIK it's not that kerosene per se is such a poor-burning fuel. Kerosene is heavily subsidized, so that poor people can afford to cook. So gas stations blend in the cheap kerosene into the gasoline. The effect is that it lowers the oc
809.
by jabl 4y ago
> My understanding is that coarrays are a modern replacement for MPI Well, yes and no. Co-arrays are a higher level abstraction, belonging to the category of Partitioned Global Address Space (PGAS). Depending on the implementation, co-ar
810.
by jabl 4y ago
That newsgroup also has more than it's fair share of maddeningly annoying people who think anything beyond Fortran77 plus the proprietary compiler extensions of the compiler they happen to use (which inevitably is some long-dead trainw

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