kristoffer

16 ms·

121.
by kristoffer 13y ago
A luxury car that has 100M+ lines of code is probably running quite a large Linux installation for Infotainment. You don't get that amount of code just for the control software.
122.
by kristoffer 13y ago
The register file and cache is typically protected with some kind of ECC. The other parts of the CPU are protected by using rad hard flip flops (be it either TMR or other means). But this is the road SpaceX is not taking ... And all these t
123.
by kristoffer 13y ago
For me the optimal (current best thinking) way of doing continuous integration is to consider the "master" branch to be the integration branch. All tests should always be working here. It should not be possible to deliver a featur
124.
by kristoffer 13y ago
It would have been interesting to hear more about their future road map since they are currently only doing low earth orbit but aim for Mars. The radiation environment is quite different of course. Maybe certain fabrication technologies (ge
125.
by kristoffer 13y ago
No code running on the Rover is written in Python. Code deployed in space is not changed "if it ain't broken".
126.
by kristoffer 14y ago
Most commercial/industrial/military grade components will break permanently after a short while (weeks) due to charge deposit from impacting ions, or from ion induced short circuit. They will also malfunction regularly because of soft error
127.
by kristoffer 14y ago
The biggest problem with FPGA dynamic reconfiguration of today is that it is slow and not fine grained. The vendors haven't really seen this as an area which their customers are interested in. Maybe this has been changing in the recent year
128.
by kristoffer 14y ago
Most FPGAs store their configuration in SRAM so they don't have any limitations in the number of programmings. There also exists flash based FPGAs which have the normal flash wearout problem. One time programmable FPGAs also exist but I don
129.
by kristoffer 14y ago
I wonder how this will affect Africa as a continent. The article doesn't mention possible effects this could have on these nations, such an analysis would be interesting to read.
130.
by kristoffer 15y ago
My experience with "fault-tolerant" OSes and their toolchains is that they are buggier than their off the shelf counterpart, probably due to limited use ...
131.
by kristoffer 15y ago
I don't see the point of using something as complex as a unix kernel for an embedded real time system. There exists an open source RTOS with a lot of space flight history called RTEMS, www.rtems.org. That might be a good choice. Also I'm no
132.
by kristoffer 15y ago
Well, FPGAs are not very cost effective for ML stuff I'd say. You're better of with a GPGPU then since it's mostly matrix operations anyway. Still, depending on the problem C could still be the best language, no need to piss on that ...
133.
by kristoffer 15y ago
Elements are required to be "sequentially allocated": This is from the draft N1256 document as I don't have access to the official standard. From 6.2.5 - Types: "A structure type describes a sequentially allocated nonempty set of member obj
134.
by kristoffer 15y ago
Another option is that the guy does not know what he is talking about ... I guess we will never know for sure.
135.
by kristoffer 15y ago
He states that the "engine management system" ran Solaris, and that was what he managed to access. I don't know what he means by "engine management system" but I am quite sure it was not critical ...
136.
by kristoffer 15y ago
There is certainly nothing critical running Solaris on a 747 or any other airplane. All airborne software needs to get certified by FAA and is developed and evaluated through the lens of the DO-178B standard.
137.
by kristoffer 16y ago
Gothenburg, Sweden (I wonder what hitrate that will get on HN?) At Aeroflex Gaisler we are looking for a talented embedded hacker that will create software for our system-on-chips based on our own LEON (SPARC32) processor. Previous experien