dfox

64 ms·

751.
by dfox 6y ago
As long as you use reasonably secure way to add entropy into the pool, ie. don't XOR stuff into some kind of pool buffer but use something that at least partly resembles secure hash even for adding entropy (as using full-blown SHA-x to
752.
by dfox 6y ago
Together with the italicized remark I read that as “there is this unnamed platform that does not use RNG but just hashes bunch of arbitrary system parameters and state and calls the result random-enough”. In fact the unnamed OS does not do
753.
by dfox 6y ago
Of historical note is that more than 8 socket Opteron servers were implemented in similar way. There was an chip (IIRC called AMD Horus) that contained two HyperTransport/CoherentLink controllers connected back to back.
754.
by dfox 6y ago
One variant how to do that involves something like UCC3750 (ie. telco ringer waveform generator), another is just using sufficiently high powered audio power amplifier.
755.
by dfox 6y ago
Except the fact that XR2206 and all similar analog sig-gen-on-a-chip devices are obsolete and essentially unobtainable as raw parts. Ok, you can buy cheap chinese "arduino-like" module that purportedly is built around such chip...
756.
by dfox 7y ago
As for what k8s adds here I don't know, but this thing adds to k8s knowledge one interesting fact: It can be useful to run container that does not contain any process doing useful work ;)
757.
by dfox 7y ago
Bear in mind that SD Express is SD only in name and otherwise it is just an NVMe in SD form-factor. And how much UHS-II is still an SD is somewhat questionable.
758.
by dfox 7y ago
The cable is absurdly thick and absurdly armored only in shallow waters near the landing point (ie. where it is expected to be affected by stuff like boat anchors). In open ocean the cable is actually surprisingly thin for how robust it is.
759.
by dfox 7y ago
Many large Python 2 projects come from age when it was not exactly practical to have ~100 external dependencies and thus do not have that. It was the time when one really though about whether having external dependency for this particular s
760.
by dfox 7y ago
Actually the idea behond Ctrl-Alt-Del is the other way around. Application can cause the same effect as user pressing Ctrl-Alt-Del (although doing that is somewhat complex due to interactions with UAC), but there is no way how application c
761.
by dfox 7y ago
This distinction is used by all CUA-derived GUI toolkits. Unfortunately by default windows uses same outline style for both default and focused buttons so there is no visual distinction. (there is an alternative button style on windows that
762.
by dfox 7y ago
The idea that free space optics are somehow secure against eavesdropping seems to parallel 80's idea that you cannot practically tap into optical fiber. You still should encrypt the link if you at all care about its security.
763.
by dfox 7y ago
That is what I wanted to rewrite it to, but it is too late to edit the comment ;)
764.
by dfox 7y ago
The general rule for precision electronics is that you want to avoid anything that needs high absolute accuracy (because such things get expensive fast even as discrete components) and instead rely on accurate ratios between parameters, mat
765.
by dfox 7y ago
For PC with any graphics card (except possibly MDA) there isn't any sane definition as to what cycle-accurate means at least if meant for the whole system.
766.
by dfox 7y ago
Almost all Microprose PC games from early 90's were structured as small .COM driver that switched between some number of separate .EXEs. IIRC there is notable exception of Civilization that used proper overlays.
767.
by dfox 7y ago
DD in JCL is not an utility, but keyword. Its functionality is something between shell's IO redirection and mounting volumes inside docker containers. The syntax itself is not that obscure in the context of JCL and IBM OSes.
768.
by dfox 7y ago
Which is probably the dumbest approach to generating OIDs as getting your own subtree is simple (and in many cases you already have your own subtree without even realizing it).
769.
by dfox 7y ago
"Jeep" is kind of special case as it apparently was used as generic name before there was the brand and trademark.
770.
by dfox 7y ago
Any random MTA including gmail's that receives your message over SMTP prepends Received header to your message that contains where the message was received from and that somewhat obviously includes the IP address where the message came
771.
by dfox 7y ago
> only exist in Lisp. Windows's SEH is essentially simplified CL condition system.
772.
by dfox 7y ago
The CL condition system is completely orthogonal to any concept of continuations or stack unwinding. Both condition handlers and restarts are plain functions and any kind of stack unwinding has to be implemented inside these functions (by m
773.
by dfox 7y ago
That is interesting point that I originally wanted to mention. There are systems that take the middle ground approach of using something that the program has to eventually execute if it is running indefinitely as scheduling opportunity. Typ
774.
by dfox 7y ago
There is one significant difference: Windows did context-switches in the blocking calls and did not rely on the program code having "the right structure" needed for straight co-routines to work. The difference between preemptive a
775.
by dfox 7y ago
10 years ago I though that writing S-expression pretty printer should be significantly easier than what the complexity of typical CL/Scheme pretty printer (ie. Waters' XP as described in AIM-1102) implies. Well that is not true ;)
776.
by dfox 7y ago
That certainly says more about the certification process than about unix-ness of macOS ;) On the other hand large fraction of UNIX(TM) certified OSes are in fact niche Linux distributions (IIRC mostly RHEL derivates). In all it is mostly ab
777.
by dfox 7y ago
There is well defined name for "useful reals": Algebraic numbers. Of course the well-definedness necessitates some limit on how the symbolic description looks like (ie. algebraic numbers are roots of polynomials with rational coef
778.
by dfox 7y ago
I feel that it is mostly about nobody else explicitly calling the strategy best-fit. For example BIBOP-derived GCs (which for purposes of this discussion includes BDW GC) are inherently best(-ish)-fit and in fact traditional unix malloc is
779.
by dfox 7y ago
You should not think of it as malloc replacement but as an GC that can work with native code that does not use fixed stack and register layout. That you can use such a thing for code generated by C compiler is side effect of that. In fact,
780.
by dfox 7y ago
What exactly is "oddball" about BDW GC?

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