yaantc

31 ms·

241.
by yaantc 9y ago
"Nostalgy" is the key one for me. Folder filling and navigation from the keyboard only. If you know emacs and helm, it has a bit of its feel.
242.
by yaantc 9y ago
Yes, his company Amarisoft sells a SDR LTE based station with EPC (the core network part) support too: https://www.amarisoft.com/
243.
by yaantc 9y ago
Possibly yes. I was assuming an RF-like behavior where there is indeed saturation of the A/D converter but the blinding doesn't last more than the interfering signal (or negligibly so). But these are for timescales in multiple of
244.
by yaantc 9y ago
Yes, I agree this is the key here. Google realized FTTH is too expensive in most places, and still are looking at wireless IIUC. Except for new buildings in dense areas or similar, it's likely that bringing fiber close and going over t
245.
by yaantc 9y ago
Disclaimer: I'm not involved in AV, but I have a telecommunication background that let me do some (hopefully) not too stupid guesses on how a LIDAR can behave here. If some expert in the field can give more authoritative feedback that&
246.
by yaantc 9y ago
If the performance gets significantly limited by instruction cache misses, then yes code density can become important as you point out. However, there are two things to keep in mind: 1) most actual RISC ISA have compact modes, typically usi
247.
by yaantc 9y ago
I have Debian Stretch running on a 3rd gen Thinkpad X1, and had some problems. It took about a year for suspend/resume to work reliably, before I had random lock-ups on resume. It turned out to be a bug in the early MMU code, and once
248.
by yaantc 9y ago
> I'm a layman, but spectre and meltdown seems like it can be a vehicle to exploit the intel management engine. No, or extremely unlikely at the very least. Spectre and Meltdown allow a low privilege program to read (not write, only
249.
by yaantc 9y ago
LTE is the next generation technology for both 3G (3GPP) and CDMA (3GPP2). Said another way: the merge already happened with LTE. So there's one continuation now, NR (New Radio) within 3GPP.
250.
by yaantc 9y ago
There is better than Huffman coding now, see range coding [1] or arithmetic coding [2], as used in Zstandard [3] for example. In a nutshell Huffman coding is optimal under the constraint that one uses an integer number of bits per coded sym
251.
by yaantc 9y ago
It's manageable in practice I believe, and Adam quickly shows a feature related to this in the demo. First, if some new features are added with associated properties, then some theorems/lemmas related to these properties will have
252.
by yaantc 9y ago
FirstNet is based on LTE. Last time i looked into it, it was a private LTE network, with the ability to piggy back on public LTE when there's no private coverage (with a high priority). So you can forget about the simplicity of a basic
253.
Intel vs GlobalFoundries at the leading edge(semiwiki.com)
114 points by yaantc 9y ago|58 comments
254.
by yaantc 9y ago
The Qt makers seem on the same page. Qt has support for SCXML [1][2], which is an XML format to represent statecharts FSM. You can edit SCXML files from Qt Creator [3], load them in your app and use them to drive your Qt GUI, or any dynamic
255.
by yaantc 9y ago
mbed is only for ARM based systems (license limitation, not technology related), and in the embedded world there's much more than ARM. FreeRTOS is easy to use on any and all CPU architectures, and is much more common. Actually, FreeRTO
256.
by yaantc 9y ago
Great points, plus from the puff readme: "In Rust, integer overflow is checked at run time in debug mode and silently ignored in release mode by default, as the run time performance penalty was deemed too great.". With puff, it&#x
257.
by yaantc 9y ago
> keep in mind LTE is effectively broken because of the emergency tower > redirection implementation And it will fails after only a few message, when the phone modem tries to authenticate the network (MME) and fails. LTE and 3G do hav
258.
by yaantc 9y ago
There's a prototype Mirage based DNS server that does that, Jitsu. See there: http://www.skjegstad.com/blog/2015/08/17/jitsu-v02/ Quote: "Jitsu - or Just-in-Time Summoning of Unikernels
259.
by yaantc 9y ago
I think there's an important difference. A great part of a developer time is reading code (even one's own), and navigation is part of it. While typing speed is only relevant to writing code. That makes efficient navigation more im
260.
by yaantc 9y ago
Please see my reply @danjoc. I don't care much about Apple really. The manufacturing world is pretty hard and penny pinching, the practice of charging for value unrelated to one's IP hurts small manufacturers who can't stand
261.
by yaantc 9y ago
This story is very Apple vs. QCOM, but I don't care much about this angle really. What I care about is the underlying question: is it ok to charge IPR on value added way outside the scope of the given IP? I don't think so. QCOM do
262.
by yaantc 9y ago
That's a very one-sided pro-Qualcomm piece. The big issue with Qualcomm IP practice is that they don't charge IPR on the modem function, but over the whole device. So put the same modem in a cheap phone, or in an expensive laptop,
263.
by yaantc 9y ago
> ..., to the web And not only. From the paper: "WebAssembly is an abstraction over modern hardware, making it language-, hardware-, and platform-independent, with use cases beyond just the Web". It could have some use in the e
264.
by yaantc 9y ago
I love Helm. Tab completion is fine when you know exactly what you want and the point is just to save some keystrokes. When completion involves some exploration is where Helm shines and is way better than tab completion, as it doesn't
265.
by yaantc 9y ago
Also, RTK requires tracking the carrier phase. And in turns this requires the receiver being kept on all the time, which is power hungry and just not acceptable for low-power / on battery applications. Whereas the dual frequency approa
266.
by yaantc 9y ago
From Intel themselves [1] TSMC and Samsung 10nm are denser than Intel 14nm. But they're closer to Intel 14nm than Intel 10nm. We'll have to see when it ships, but the expectation is that Intel 10nm will be ahead of TSMC/Samsu
267.
by yaantc 9y ago
> But at the industrial level, it's just hype. Wrong. I believe most people here are focused on high performance implementation (servers, desktops, laptops) and Risc V won't get there for a long time, if at all. High performanc
268.
by yaantc 9y ago
This was on an ARM926 running a quite large code base. The ARM926 TLB has only 64 entries, which is not much when running an OS with 4 kB pages. So that's quite an extreme (and old...) case, but interesting when dealing with rather sma
269.
by yaantc 9y ago
Could reduced MMU overhead be significant on a server? I work in the embedded space, so very different with small CPUs. Using an MMU compared to a simple MPU can waste 25 to 30% of a CPU cycles easily. I wouldn't expect such overhead o
270.
by yaantc 9y ago
Evil (Extensible VI Layer for emacs) is one way to go. I've heard it's pretty good, although I don't use it myself (native emacs). https://www.emacswiki.org/emacs/Evil

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