cfallin

10 ms·

61.
by cfallin 7y ago
ZIP+4 in the US is quite specific, though. E.g., my ZIP code is probably > 50k people but the ZIP+4 is just my apartment building.
62.
by cfallin 7y ago
Yeah, this should be roughly the same overhead as an ADD: LEA rDest, [rBase + 8*rPtr] (The "load effective address" instruction computes an effective address like a load or store would, but just gives the address without
63.
by cfallin 7y ago
I've only encountered that once in the US but it was great as well -- Southwest at LGB (Long Beach, CA) had a separate set of air-stairs at the back door for boarding. I would guess it's not done more here because there are few ai
64.
by cfallin 7y ago
That's not the goal of a VM/runtime, though: it only ensures that the hosted code cannot escape the sandbox, and provides a correct implementation of the semantics of each VM opcode. The hosted code's computation implemented
65.
by cfallin 7y ago
My understanding of the issue, when I was in Pittsburgh ('09-'13 and '15-'19) was that it was a combination of Clairton Coke Works pollution and unfavorable winds/weather patterns that would cause the smell to stick
66.
by cfallin 7y ago
"Day After Trinity" is also a fantastic documentary in this area! It spends a lot of time on Oppenheimer's character and has interviews with a bunch of his former colleagues.
67.
Show HN: TreeOS – A 16-bit bootsector Christmas tree demo(github.com)
5 points by cfallin 7y ago|0 comments
68.
by cfallin 7y ago
Yes, it records all syscall return values, so the replay doesn't actually need to perform them. This means that IO (GUIs, network accesses, etc.) shouldn't happen on replay, in general. (The replay does show stdout/stderr dat
69.
by cfallin 7y ago
> I also understand it’s a very “sporty” city, which is something I’m not very into. I wouldn't necessarily discount the city for this; in my time there, I realized there were really two Pittsburghs. You'll see the steel-town f
70.
by cfallin 7y ago
Happy Fastmail user for 3.5 years so far. I particularly like (and am happy to support with my subscription fee) that they have active engineering staff building new technology and contributing it back -- in particular, their JMAP protocol
71.
by cfallin 7y ago
I don't have an answer to your question, but my favorite (cynical) example of this phenomenon is the Johnstown Flood Tax on all alcohol sold in Pennsylvania (set at 18%). The tax was originally meant to help the town recover. The flood
72.
by cfallin 7y ago
That would still involve entering and leaving kernel mode, because timer alarms ultimately are triggered by a hardware interrupt (from e.g. the APIC timer or, in really old x86 machines, the 8254 programmable interval timer, aka IRQ 0). So
73.
by cfallin 7y ago
The problem is that the async model is a form of cooperative multithreading, so if one computation runs for a long time without returning to the main event loop, it can increase the latency for responses to other events. E.g., if one HTTP r
74.
by cfallin 7y ago
That means "same power", in the context of a comparison of some other metric. So (from the article) "15% higher performance at iso-power" means that for the same power draw, a chip made with the new process has 15% bette
75.
by cfallin 7y ago
Yes, indeed; Restic just happened to be an easy-to-use deduplicating backup program that supports various cloud storage backends, including the one I happen to use (Backblaze). Not needing to patch together some sort of pipeline of dedup --
76.
by cfallin 7y ago
I've been using Restic recently for backups online (to Backblaze, which it natively supports) after using Duplicity for a while. I'm really, really impressed so far; the hash-based deduplication means: - I don't have to think
77.
by cfallin 7y ago
Yes, an interesting exercise I did once was to actually draw the dependency graph of auth material (both passwords and 2FA tokens/devices) and accounts, with edges where one thing can bootstrap another. E.g., with my password database
78.
by cfallin 7y ago
That's the difference between GPL and AGPL. GPL only requires source distribution if you distribute binaries, not if you run your binaries on your own server responding to requests from users. AGPL requires source distribution for any
79.
by cfallin 7y ago
"IP core" can mean "soft IP", which is just RTL, or "hard IP", which is a full layout (set of mask layers), ready to put on silicon. I haven't read the SiFive announcement closely, but if they're quot
80.
by cfallin 7y ago
The RIPE guidelines at [0] line up with what I've heard as justification before: basically, /64 is the smallest you can go without lots of manual configuration (the way that SLAAC auto-assigns addresses from Ethernet MACs or rando
81.
by cfallin 7y ago
Yes, I have native IPv4 too, with the usual NAT. I think the default router that Comcast will rent to you actually is dualstack in this way too -- IPv4 NAT, and IPv6 prefix advertised for devices that want it. I actually played with NAT64 f
82.
by cfallin 7y ago
Sure! The keyword to look for is "DHCP-PD" (DHCP prefix delegation). I run a little OpenBSD router and my dhcpcd.conf is here [1], but I've done this before on a Linux router box too -- here are some instructions from Arch&#x
83.
by cfallin 7y ago
This is my favorite bit about native IPv6 at home [0]. No more port forwarding to expose particular services -- I can just `ssh desktop.home.net` or `ssh other.home.net`, and they both get to run on default ports! (Of course, one probably w
84.
by cfallin 7y ago
> DC/DC step-up/down voltage regulators Interestingly, there is actually a hydraulic mechanism that's the equivalent of a boost converter with inductor, diode, and switching element: https://en.wikipedia.org&#
85.
by cfallin 7y ago
Yeah, the way that the border juts upward around the Great Lakes makes for interesting equi-latitude pairs. I grew up near Portland, OR, which is at essentially the same latitude as Montreal or Ottowa, though the climates are nowhere near s
86.
by cfallin 7y ago
> what happens is you pay and become the product I remember the first time I saw an ad on the in-flight entertainment system on a plane. (I think it might have been United, but they all do it now...) This and the shilling for their speci
87.
by cfallin 7y ago
Yeah, the old parking lot around Hamerschlag became the new fab / nanotech lab when Scott Hall was built (finished 2016) -- they connected HH C-level to Wean 4, a major boon to winter-time indoor connectivity. Google Streetview has a p
88.
by cfallin 7y ago
Wow -- the engineering cleverness is actually really incredible (using heat expansion of the nichrome wire to automatically lower the bread! fully mechanical closed-loop monitoring of bread surface temperature!). Tempting.
89.
by cfallin 7y ago
Yes, the electronics/appliance selection, when one needs it, can be slightly lacking. Costco appears to reduce costs by often stocking exactly one option for a given thing. E.g., I'm in the market for a toaster as my old one died
90.
by cfallin 7y ago
I'd just like to second the used-Thinkpad route. I picked up an X250 (Skylake i5) on eBay last spring for $160, and after maxing out RAM (8GB), a decent SSD and a new battery I'm out ~$350 for something that is both indestructible

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