General > General Technical Chat
don't forget to reboot your boeing, or else
MK14:
--- Quote from: blueskull on April 03, 2020, 03:41:47 am ---2^32/24/3600/1000=49.7. Sounds like a 1ms tick counter overflow.
--- End quote ---
I heard that, from another source. But the rumour goes further.
It uses the 1024/1000 (because some things do it that way, when converting) concept.
So 49.7 x 1024/1000 = 50.9 = A lot closer to the 51 days.
I.e. The 1 millisecond, may be a value (such as 1.024 ms per tick), so that rapid bit shifts can be used in calculations, rather than much slower full divides. Or some similar reason, why it is 1024/1000.
N.B. I didn't write the software for them. So can only guess at why it is 1024/1000. Which it could easily NOT be, anyway.
Anyway, I think it is completely crazy that they have to do that. So, if they miscount the 51 days (e.g. leap year), does the plane crash into a mountain and kill everyone on board ?
Why can't they fix the software, properly ?
(Yes, it would be expensive, but it seems a bit risky to leave a software bug like that, in the airplane).
Such problems, shouldn't of been designed into the plane in the first place and also, should have been found, in their careful tests and analysis of the safety critical software, on the planes systems.
This doesn't give me confidence, in their software.
Yansi:
--- Quote from: Halcyon on April 03, 2020, 01:12:30 am ---Reminds me more of Windows 10. Every week or so, I have to reboot my workstations at work because randomly, the USB ports stop working.
--- End quote ---
Wau! And I thought it was only my computer that does it! Insane crap...
Electro Detective:
"Windows has deactivated the USB sockets
to protect your computer due to user failure to update security on a regular basis.
If you want functionality restored and not see this message again,
YOU (expletive) KNOW WHAT TO (expletive) DO !
or visit www.obeymsknowsbest.com
Have a nice day :) "
senso:
--- Quote from: MK14 on April 03, 2020, 08:17:35 am ---
--- Quote from: blueskull on April 03, 2020, 03:41:47 am ---2^32/24/3600/1000=49.7. Sounds like a 1ms tick counter overflow.
--- End quote ---
I heard that, from another source. But the rumour goes further.
It uses the 1024/1000 (because some things do it that way, when converting) concept.
So 49.7 x 1024/1000 = 50.9 = A lot closer to the 51 days.
I.e. The 1 millisecond, may be a value (such as 1.024 ms per tick), so that rapid bit shifts can be used in calculations, rather than much slower full divides. Or some similar reason, why it is 1024/1000.
N.B. I didn't write the software for them. So can only guess at why it is 1024/1000. Which it could easily NOT be, anyway.
Anyway, I think it is completely crazy that they have to do that. So, if they miscount the 51 days (e.g. leap year), does the plane crash into a mountain and kill everyone on board ?
Why can't they fix the software, properly ?
(Yes, it would be expensive, but it seems a bit risky to leave a software bug like that, in the airplane).
Such problems, shouldn't of been designed into the plane in the first place and also, should have been found, in their careful tests and analysis of the safety critical software, on the planes systems.
This doesn't give me confidence, in their software.
--- End quote ---
Due to certification, they would have to re-test all the software if its in fact a tick timer that will be used almost everywhere in the code..
And that is expensive, and the CxO can't go home without their 10+ million performance bonus..
MK14:
--- Quote from: senso on April 03, 2020, 09:31:02 am ---Due to certification, they would have to re-test all the software if its in fact a tick timer that will be used almost everywhere in the code..
And that is expensive, and the CxO can't go home without their 10+ million performance bonus..
--- End quote ---
But the air standards authorities, should INSIST, that it is done properly.
If there was a component, in the planes engine, which wore out every 51 days. The engine would explode and crash the plane, if they forgot to replace it.
I suspect, they (air standards authorities), would insist that the planes are recalled, and the "faulty" short life parts are redesigned, to last the proper/expected life expectancies (e.g. life of the engines).
Software, should be the same.
E.g. The planes will likely be in storage or unused, for LONGER than 51 days, because of the virus. So, if it had been left on (e.g. some planes kept on, in standby (or whatever it is called, in plane jargon), for various reasons, so it can be ready quickly. I heard this a long time ago. It usually applies to military planes, especially), and needed to be rebooted. It could just take one plane, where they forget to reboot (or similar mishap), and it could spell disaster.
In this case (extended coronavirus long term shutdown, many weeks or months), the aircraft would probably be shutdown/off.
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