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Mercedes-Benz previews its operating system MB.OS

media.mbusa.com

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Re: Mercedes-Benz previews its operating system MB.OS

#241

Post by jacquesm »

qrohlf wrote: post #5

I was recently an owner of a Merced-Benz commercial van, and the software was by far the worst part of that whole experience. It had obvious race-condition type bugs when it came to the user interface layer, but most frustrating was its tendency to succumb to some kind of memory leak on long drives where the entire head unit would just lock up and crash to a black screen after 6-7 hours of being turned on. Because th…

Mercedes' crap software caused me to stop driving them, even though I love the handling, the reliability of the engine and the general lack of distractions. They really blew it, their software is a safety liability rather than an asset and I really wonder what caused them to drop the ball in such a terrible way.

Re: Mercedes-Benz previews its operating system MB.OS

#242

Post by jacquesm »

xattt wrote: post #191
SoftTalker wrote: post #101

Earlier quoted context omitted.

> Cruise will also disengage in heavy rain or snow That’s what it should do, honestly. It’s not safe to drive with cruise control in low traction conditions.

This is one unconscious bias from California-based self-driving companies: weather conditions worse than overcast skies exist in other parts of the world. Recently, I drove in a whiteout blizzard with huge flakes without much accumulation on the road. Road was drivable, but I couldn’t see road markings. The experience would have been less scary with some sort of augmented display to show the road borders.

> Road was drivable, but I couldn’t see road markings.

That's a bit contradictory. If you can't see the road markings the road is not drivable.

Re: Mercedes-Benz previews its operating system MB.OS

#243

Post by jacquesm »

cvccvroomvroom wrote: post #165
deaddodo wrote: post #138

Earlier quoted context omitted.

> Care to guess how many boards can sit in a warehouse for many years and still have good capacitors. If you guys are having trouble storing boards for 10+ years with caps regularly going bad, I would highly recommend you look into a new supplier. Well-built caps should have no problem going for 25+ years in storage (especially cold). In addition, this is probably the easiest component on the board to replace. If you…

Or ditch electrolytic and tantalum caps wherever possible because they're crap. It's often possible to engineer a more expensive, reliable LR circuit for the impedance of a cheap RC one.

Tantalum have their own issues. Yes, they live longer. But they're nice little fire starters and are much more critical than electrolytic capacitors when it comes to voltage tolerance.

Re: Mercedes-Benz previews its operating system MB.OS

#244

Post by jacquesm »

GoToRO wrote: post #81
qrohlf wrote: post #5

I was recently an owner of a Merced-Benz commercial van, and the software was by far the worst part of that whole experience. It had obvious race-condition type bugs when it came to the user interface layer, but most frustrating was its tendency to succumb to some kind of memory leak on long drives where the entire head unit would just lock up and crash to a black screen after 6-7 hours of being turned on. Because th…

That sw does not come from Mercedes, they just buy different devices for what they need from suppliers. The salary offered by one such supplier for a graduate engineer was less than what a construction company was offering to hang dry wall (qualified worker). The construction company was raising a new building for the supplier.

That was their choice though.

Re: Mercedes-Benz previews its operating system MB.OS

#246

Post by jacquesm »

jen20 wrote: post #190
ls612 wrote: post #131

Earlier quoted context omitted.

Like what’s the highest quality luxury brand now, Lexus? Given that it’s Toyota engineering behind it I’d assume they are still good but I’ve never been in that market so idk.

Still those three, plus Lexus, Infiniti, Acura, Range Rover etc.

RR is overpriced junk.

Re: Mercedes-Benz previews its operating system MB.OS

#248

Post by AlotOfReading »

jason_wo wrote: post #185
throwawaylinux wrote: post #179

Earlier quoted context omitted.

Just a nitpic, Linux can run on CPUs without MMUs, and it has APIs for locking memory and real time scheduling but that's not why it is not a hard-realtime OS.

Yes you are correct. I am currently having a project, making Linux "as real-time as possible": locking memory with mlockall, isolating cores, preempt kernel patch, .... It is still not real-time because you have no guarantees, but you typically get a max jitter of 0.1 ms, which is good enough for my use case. You could use Linux without a MMU (uClinux), e.g. on a Cortex-M, but is a horribly experience and no standard…

Preempt RT does give guarantees in the sense that unbounded latency is a bug and theoretical maximum latency bounds are known (see [0]). It is neither certifiable nor formally proven, but it's good enough for almost anything that isn't safety-critical. For the things that do require functional safety, you can use AGL and other hypervisor architectures that partition the critical and non-critical tasks with a few more changes to your code.

[0] https://bristot.me/demystifying-the-real-time-linux-latency/

Re: Mercedes-Benz previews its operating system MB.OS

#249

Post by jacquesm »

solarkraft wrote: post #167
oneplane wrote: post #18

Earlier quoted context omitted.

Ecosystems are the key, not so much in which house or how public it is built. (see: iOS) It's also a system for a car, and probably a niche one at that. There are a few things that are relevant in Car-OS these days: - Ecosystems - Long-term maintenance - Integration with a phone that takes over most day-to-day interactions - Car should work without it If MB.OS and BMW's version and Audi and whoever else wants to buil…

> If anything, MB.OS is about as relevant to a consumer as QNX is QNX isn't exactly defining for an ecosystem, MB.OS probably will be.

I beg to differ with that. If you shut down QNX globally it would pretty much end civilization. So much stuff runs on that little core that it boggles the mind.

The great gift of QNX is that it is so reliable that you forget it is there. But no mistake: it is still there and it still works and without it you'd miss it right away.

Re: Mercedes-Benz previews its operating system MB.OS

#250

Post by jacquesm »

speculator wrote: post #247

ironically there aren't any screenshots in the post to show what MB.OS looks like.

It likely doesn't look like anything other than bitstream. Think 'linux kernel' rather than 'ubuntu'.

It's a foundation component. MBUX is a layer on top of MB.OS, and that does have a particular look and feel.

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