pslam

13 ms·

121.
by pslam 12y ago
> I am forever amazed that people think an eighty thousand dollar plus car that barely does more than two hundred miles per charge is some kind of breakthrough. It's a no-compromise, all-electric luxury car which absolutely replaces
122.
by pslam 12y ago
Why are you vilifying H1B in this? H1B holders would have been affected just as badly by this as anyone else. In fact, probably more so. It's difficult to move job as an H1B holder due to the legal requirement to have the same job role
123.
by pslam 12y ago
I am quite familiar and in fact that paper concludes that jitter is not detectable in normal consumer equipment: "About 25% of the listeners detected jitter when its size was 500ns. When it was 250ns, however, no listener could discr
124.
by pslam 12y ago
No, jitter is not a problem. It is more than a stretch to go from "jitter as a theoretical problem" to "jitter as an actual problem" - it is absurd. Don't even give this credence. The only way to make jitter audible
125.
by pslam 12y ago
You can use the DIMM slot for the DDR bus interface, but not used in the traditional way DRAM would be. The DDR interface is extremely fast, and can be purposed for uses other than the standard row/column/select/precharge e
126.
by pslam 12y ago
Well written! I was just looking for the Shannon Minimum Coding Rate definition the other day, so it was nice to have a quick refresher on the basics. This also highlights a fundamental issue: the coding scheme is tailored to the expected d
127.
by pslam 12y ago
It's the packaging aspect of it -- BPG has an encoder ready to encode images, and Javascript ready to copy-paste into your web pages. It might be a good way to get traction, even if it's not the end product.
128.
by pslam 12y ago
Back when BPG was announced, I mentioned here that the real headline was the idea of distributing a new image codec without requiring a browser change , and without requiring the format to be solidified . So, it should be possible to emsc
129.
by pslam 12y ago
Intel/AMD already handles flag-setting in this fashion because the vast majority of ALU instructions have a flag side-effect. There is an additional latency to get flag results. The latency is not paid unless you depend on them. Over
130.
by pslam 12y ago
I am not describing constant checking of overflow . The sticky flag is the OR of any overflow flag between the last flag-clear operation and a speculation pivot. It does not need evaluating between every operation. In fact in the example I
131.
by pslam 12y ago
It's not that unreasonable to ask for hardware support for overflow checking. There's various ways it can be supported which make it much cheaper than naive methods. For example, ARM has a sticky overflow flag "Q". The
132.
by pslam 12y ago
The big story here is this introduces a new image file format without requiring you to upgrade a browser or download a plugin . Those aren't PNGs of representative images you're looking at - that's BPG decoding happening in
133.
by pslam 12y ago
That's got to be a typo, or this story is burying the lead. Is pumped hydro really 30% more inefficient than even that figure? Because that would mean it's almost entirely a waste of money for anyone to store energy by this or oth
134.
by pslam 12y ago
Summary: * TPM at the root of trust. * CPU state cleared to known-good using SKINIT to reset a core. * "Formally verified" kernel/stack. * Dafny, a safe language to write it in. * Verifiable machine code, like Google's N
135.
by pslam 12y ago
Not just that, but because it's a fixed key, and it's now known, there was no forward security. If you've been in any way able to collect pictures but not decrypt them, now you can.
136.
by pslam 12y ago
The media in this article is frustrating. The lead of this story is the incredible size of these container ships, but no photos, and no parts of the video, show the ship side-by-side anything which gives us a sense of scale. It's all v
137.
by pslam 12y ago
$600,000 is enough to make the entire venture very much unprofitable. Whoever in the management chain was responsible for this will have trouble meeting their targets, not to mention keeping their job. The PR damage is massive. The FCC has
138.
by pslam 12y ago
Indeed. The media report is an odd spin, considering the headline of the EU report is: "Erasmus Impact Study confirms EU student exchange scheme boosts employability and job mobility" The part about "1 million babies" is
139.
by pslam 12y ago
All kernels I know of zero all memory they hand over to user processes. It's been part of basic security for quite some time - exactly for this kind of thing. It's usually done on allocation, not free - it doesn't really matt
140.
by pslam 12y ago
Part 2 is correct in that trying to zero memory to "cover your tracks" is an indication that You're Doing It Wrong, but I disagree that this is a language issue. Even if you hand-wrote some assembly, carefully managing wher
141.
by pslam 12y ago
Do you have a basis in fact for any of this? I, like the other replies here, had the exact salary which my H1B Visa application represented to the DoL. It is illegal to misrepresent this, so in order for the prevailing wage to be misreprese
142.
by pslam 12y ago
You can actual write in assembler on iOS and use that (sparingly) in your programs, which means there are optionally no layers between you and the CPU. For almost all apps, that's unnecessary, but it's there as an option if you re
143.
by pslam 12y ago
Is this actually true? I've seen this repeated in many comments over a decade, and whenever it's researched it turns out there is no basis for it. The usual conclusion is that the manufacturer claims that they cannot allow open
144.
by pslam 12y ago
If OpenSSL was written in a managed language, someone would need it in an environment a managed language wasn't suitable for, and end up porting it to C.
145.
by pslam 12y ago
This is what I was getting at. It opens you up to accusations of discrimination. Background checks are different to researching a candidate. They are to check that the person doesn't have a hidden criminal record, for example. Research
146.
by pslam 12y ago
Correct me if I'm wrong, but isn't researching the background of a candidate beyond the contents of their resume - in other words expecting them to have and inspecting their LinkedIn profile - illegal?
147.
by pslam 13y ago
I doubt there are many people in the latter category. It is simply too expensive to live like that, unless you're very, very wealthy, which is a very small number of people, and probably only a very small number of those who are asshol
148.
by pslam 13y ago
He points out this is a simplification several times: "For the sake of simplicity, imagine the CPU’s pipeline depth is 3. At a given time, it can fetch, execute and finish one instruction" and later: "I don’t k
149.
by pslam 13y ago
That's just nit-picking the nomenclature. The author is simplifying things greatly but he's essentially correct - the naive version with less operations ends up slower because there is a long chain of dependencies. With out-of-ord
150.
by pslam 13y ago
That's quite a security hack. The Grandmasters are being made to play each other via him - they are kind of oracles.

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