tnt

whitequark, 19 days ago (edited 18 days ago) to random

Can you answer this simple question about the C programming language?

$ cat test.c
#include <string.h>
#include <stdio.h>
int main() { printf("%d\n", strlen("\x01c")); }
$ cc test.c && ./a.out

What number does this program print?

whitequark, 1 month ago to random

did you know: maximum-sized USB HS BULK packets where the payload is all-ones are about 16% longer to transmit than the ones where the payload is all-zeroes or random?

this is easily measurable using the #GlasgowInterfaceExplorer with a slightly modified benchmark applet:

I: g.applet.internal.benchmark: mode sink-zeroes: 42.84 MiB/s (342.70 Mb/s)
I: g.applet.internal.benchmark: mode sink-ones: 38.91 MiB/s (311.25 Mb/s)

(the measured overhead is about 10% due to other factors, e.g. scheduling)

DrewNaylor, 1 month ago to videoediting

PSA: Resolve Studio requires the USB drive to remain plugged in and will check every few seconds for its presence.

#Resolve #DaVinciResolve #VideoEditing

gsuberland, 1 month ago to random

to help you with the condition that causes you memory problems, you should take these tablets every day of the week. we put the tablets in sheets of ten. do you like this.

gsuberland, 1 month ago to random

captain's log, star date 20240409.1

ow. computer, summon the EMH so he can get me some painkillers.

tnt, 1 month ago to random

Me wondering why my signal level sucks...
And then :

ploum, 1 month ago (edited 1 month ago) to random French

Quelles sont vos alternatives à Google Drive pour des étudiants utilisateurs de LibreOffice qui doivent collaborer pour rédiger un rapport ? Les étudiants ne sont pas des geeks, pas de self-hosting.

UPDATE : Merci, plus besoin de réponse. J’ai Framapad, Cryptpad et OnlyOffice (du plus léger au plus complet)

gsuberland, 2 months ago to random

What do the Goa'uld say when they want to measure the light quality of a white LED?

Jaffa, CRI!

gsuberland, 3 months ago to random

can anyone explain this section on preferred length equalisation patterns, from STM AN5122, where they say that switchback patterns (aka trombone routing) are preferred over serpentine patterns (aka accordion routing) when routing DRAM traces, due to serpentine "provoking orthogonal propagation"?

my understanding was that trombone routing causes more crosstalk and is only really used on low speed parallel buses. not sure what "provoking orthogonal propagation" means here in terms of SI impact.

timonsku, 3 months ago to random

Me: Why do I feel so groggy and tired?

oh..

ploum, 4 months ago to random

When I graduated as an engineer, a friend told me "How do you feel entering a plane when you know that people like us build it".

I’ve worked several years in the automotive industry and saw how software was done there.

When the 737-MAX crashed, I entered into the rabbit-hole and built a really good understanding of the software issue.

The result are:

• I don’t board a boeing plane anymore.
• I avoid cars as much as I can.
• I be sure to recommend cars with the less possible software.

azonenberg, 4 months ago to random

Validating my new SDR receive setup with some known over-the-air test signals.

I used some random antennas I had lying around, didn't bother to VNA them so they might not be well matched to 2.4 GHz. But good enough for a quick test and I wanted to use an ISM band to keep the FCC happy even though I was doing a short, low power test (0 dBm / 1 mW input power to the antenna, sending 250ms of unmodulated carrier at each frequency within the sweep).

I'm seeing exactly what I expect, so everything seems good. Is ~80 dB of path loss typical in this kind of a setup (TX and RX maybe 8m apart using what appear to be simple dipole antennas) or is that a sign one or both of the antennas are badly matched to 2.4 GHz?

TX is Siglent SSG5060X-V vector signal generator with no modulation or external PA, just 0 dBm carrier right into the antenna. RX is my AntSDR running the UHD-compatible firmware.

Screenshot of gqrx listening to my AntSDR with the sweep pattern displayed on the waterfall view

tnt, 4 months ago to random

Does anyone have resources / guides / examples on how to build OSHW zigbee end devices on linux ? Like without needing a windows VM to install some vendor dev environment ...

ploum, 4 months ago to random

My blog is unavailable due to the hosting provider, #sourcehut, being heavily DDOSed. Like @Codeberg and also #hackernews

The only way to protect yourself against such attacks seems, those day, use #cloudfare.

Which raises an interesting question: with his distributed infrastructure, what would prevent Cloudfare itself from DDOSing every non-customers ?

What makes Cloudfare business different from a criminal racket?

tnt, 6 months ago to random

Anybody that can offer remote access to a system with an intel Arc GPU ? (to some linux install I can mess with ...).

I implemented some CL/GL interop between mesa and intel-compute-runtime but it's not working on A750 (and presumably other Arc) but I don't quite feel like buying another GPU ...

(But heh, if someone wants to send one my way that's also an option 😅 )

timonsku, 6 months ago to random

why-dsi-is-annoying.png

for some reason DSI displays specifically love to have under documented init sequences.

gsuberland, 7 months ago to random

LTT: "we're going to slow down our production pipeline to make clearer, more accurate content"

LTT, a couple months later: "here are three videos about the same topic that we shot out of order and which, through the magic of editing, paradoxically reference each other with jumbled chronology"

timonsku, 7 months ago (edited 7 months ago) to random

Any favourite workflow tips/blog posts for working on Kernel driver (modules)?
Looking for nicer workflows for rapid iteration on single modules.

Executed on metal, emulation not an option here.

#linux #kernel