any1

10 ms·

61.
by any1 7y ago
According to "man vdso", futex is not in vDSO on any architecture. What eliminates the syscall cost is that it's rarely called due to elision. A mutex may try to spin more than a "couple of times" before it calls fu
62.
Slowing Down a Stock Exchange with 38 Miles of Cable(youtube.com)
1 points by any1 8y ago|0 comments
63.
by any1 8y ago
The quotes by Ronald Sagatun read like self-deprecating satire. It seems that the BBC are either clueless or in on it. In any case this should not be taken too literally.
64.
Monitoring processes by abusing mutexes(andri.yngvason.is)
4 points by any1 8y ago|0 comments
65.
by any1 8y ago
Thanks for sharing this, I will look into it. We have luajit on our system so this might be just what I need.
66.
by any1 8y ago
I do not think that I would mind so much having to re-compile between kernel versions if it's just a matter of running "make" and copying the binaries to the target.
67.
by any1 8y ago
My biggest grievance with BCC has been, as noted in the article, that it requires LLVM to be linked in. Also, it requires a Python interpreter on the target machine. I've also wondered why eBPF can't be pre-compiled. Installing th
68.
by any1 8y ago
I usually just let the branch predictor figure it out on its own.
69.
by any1 8y ago
A similar thing happened in Iceland a few years ago. Article is in Icelandic: https://www.mbl.is/frettir/innlent/2017/05/05/snaebjorn_daem...
70.
by any1 8y ago
I'm cross-compiling, meaning I'm not compiling on ARM. ;) It might be helpful though for 64 bit ARM, but my target architecture is 32 bit and because I need webengine I suspect that it will not compile on a 32 bit platform. The pr
71.
by any1 8y ago
Well, I've actually spent 3 days trying to get Qt5 to cross-compile for a custom arm platform. It might be easier for something common like the raspberry pi, but still, you may have dodged a bullet there. ;) The worst thing about cross
72.
by any1 9y ago
Yes, which is why I would always use the second example for the print function. Edit: In fact it is possible to handle the cases explicitly while enforcing types by having the X-macros call functions in the switch/case and declaring pr
73.
by any1 9y ago
Yes, this would work. I can see that variant may prove useful for the case that you present, but it is much less elegant for the usecase which the author tries to present. Edit: Replaced second "useful" with "elegant"
74.
by any1 9y ago
Sum types can actually be implemented quite effectively using X-macros in both C and C++. In fact, I feel like they're simpler and more intuitive than this variant stuff. Edit: Let's use the same example. #define SETTINGS \
75.
by any1 9y ago
The printing was only a simple example. A less contrived example would be to evaluate an AST. E.g. you would want the '+' operator to do different things for strings and numbers. Also, your visit function does not do exactly the s
76.
by any1 10y ago
I used this for my router: http://pcengines.ch/apu2.htm No complaints yet, except pfSense is not that great with Wifi. It's probably best to do wifi separately if you want to run a BSD flavour on it. I haven't tri
77.
by any1 10y ago
It's usually managers who buy the hype. They're the ones who need to be told to be sceptical. Nice post, by the way.
78.
by any1 10y ago
During my time as a systems programmer, I've gone from C to C++ to C again. At first, I didn't understand it so I feared it. Then I understood some of it, so I liked it. Finally, I understood most of it, so the mirage dissolved in
79.
by any1 10y ago
Exactly.
80.
by any1 10y ago
A few reasons: * It's easier to find people with JS skills than C++ skills * It takes ages to build Qt and it's unreasonably hard to compile. Building the Linux kernel is far less painful. * It takes ages to build a single Qt proj
81.
by any1 10y ago
I work at a company that's in the food industry. Currently, we're running Linux with Qt 4 on PowerPC. We're moving to a newer CPU (i.MX6 quad core). Freescale announced that they would continue manufacturing and supporting it
82.
by any1 11y ago
I made a "JSON parser generator" a few months ago. There is no memory overhead because it just puts the json data straight into a C struct while it's parsing. https://github.com/marel-keytech/jsoncc
83.
by any1 11y ago
nim has some sort of automatic cycle detection. You might want to look into how they do it. It doesn't hurt to check it out.
84.
by any1 11y ago
Excellent! I was hoping that the answer would be that there is no GC.
85.
by any1 11y ago
Does it have GC? Or does it perhaps use reference counting? Can it detect cyclic references?
86.
by any1 11y ago
s/everything/ready-made sandwiches/; I live in Iceland. The trick is to either prepare your own sandwiches or eat something else.
87.
by any1 11y ago
This works quite well on my Nvidia Shield Android TV. Now I just need a way to easily shift between the browser and the terminal.