Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by lorenzhs on Sunday June 25, 2017 @11:38AM
(#14630484)
Really? How is it different from a kernel bug that causes random behaviour? Both apparently can be fixed with a software update. They're both bad, but why should Intel be held to a higher standard if mitigation is similarly complex?
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Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by wav-part on Sunday June 25, 2017 @12:10PM
(#14630677)
Because futher down the stack, more reliable a tech has to be. Otherwise good luck debugging. Also agree with heisenbit.
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by justinclift on Sunday June 25, 2017 @12:32PM
(#14630805)
Hmmm... on that note, if the universe is a simulation, then a bug in that could have some interesting ramifications.
"Don't use the bookshelf over there, physics is broken on that shiny spot." :D
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by krylon on Monday June 26, 2017 @08:07AM
(#14636071)
// FIXME Trying to read both the position and the momentum of a particle reliably crashes the simulation.
// Workaround: Make the accessor method return fuzzy values for either of those values.
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by roywiggins on Sunday June 25, 2017 @01:22PM
(#14631070)
The problem with finding a physics bug is that it's liable to be amplifiable. Break conservation laws just a little bit and suddenly you have potential for exponential runaway leading to an unplanned reality excursion, and say goodbye to your light-cone.
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by justinclift on Sunday June 25, 2017 @01:34PM
(#14631129)
Well, by definition the behaviour would be undefined so could go any which way. ;)
Modern day VM software has various levels of exception checking, and code to catch/mitigate/etc when bugs crop up.
So, a universe-capable simulator might have any kind of behaviour if/when a bug occurs. It doesn't need to be an unbounded, runaway scenario. :)
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by rbanffy on Sunday June 25, 2017 @06:48PM
(#14632663)
And, if a very bad reality excursion happens, you scrap that branch and restore the last checkpoint. Nobody inside the simulation will ever remember it. You only bother fixing it if halt/scrap/restore becomes a burden.
It probably happens more often than we imagine ;-)
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by wolfgke on Monday June 26, 2017 @07:14AM
(#14635819)
> Hmmm... on that note, if the universe is a simulation, then a bug in that could have some interesting ramifications.
> "Don't use the bookshelf over there, physics is broken on that shiny spot." :D
You know "The Animatrix - Beyond"?
Re:Intel Skylake/Kaby Lake processors: broken hyper-threading
by justinclift on Monday June 26, 2017 @11:55AM
(#14637741)
Nope, just looked it up though:
https://en.wikipedia.org/wiki/The_Animatrix#.22Beyond.22
Seems like the same kind of concept. :)