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During April and May, Intel started updating its processor documentation with a new errata note — and over the weekend we learned why: The erratum is described in detail on a Debian mailing list, and affects Skylake and Kaby Lake Intel Core processors in desktop, ….
Don't get all giddy. Apple will deliver these new systems with the microcode already patched, you can be sure of that. The Screen is a whole lot better as is the GPU than the version but you don't seem to care.
And the problem is probably temporary so won't affect many people who buys iMac's these days eh? It will have eight cores instead of four, at higher clock speed, so it will be an awful lot faster. It is also supposed to ship in December , and we might assume that Intel will get its act together and ship a fixed product by then.
They don't have to. As soon as the user has done first setup it will run the update and pull in the relevant patches since production, update, possibly reboot and that will be that. Sure, what is produced now well, in a few days from now may be supplied pre-patched already, but there's no point in opening up existing stock, that would be silly: There is also the problem that something new may have shown up by then: My iMac does have some cooling issues..
As for rendering, etc.. But sure not as pretty, and if you like Mac OS This can only happen when both logical processors on the same physical processor are active. It has dropped off the radar quickly. In about a computer manufacturer - not Intel - trained me and a colleague we were in an outside company to create new microcode for their processor. Components of the CPU are running in parallel, some taking several clock cycles, and the microcode designer must take account of these things.
I am sure modern Intel CPUs are much more complicated than anything from I hope they have better development tools, including simulators, than we did. But now I wonder if there are bugs or design weaknesses in those tools. This offered various processing speed upgrades as and when the customer required them - without major disruption. Been there, done that. Too hard for me, race conditions are crazy.. I would rather have somebody else do that job Somewhere in that book is a quote along the lines that at least one person afterwards "went back to the soil" - where things moved more slowly than nanoseconds.
Having taken a break from IT on a farm for similar s reasons - I was then glad to get back into IT "where things move a lot faster than the seasons". Can't remember why the approved new development failed to meet its deadlines - but a skunkwork based on existing hardware was a success.
The problem occurs only with active hyperthreading, i. Hard to find that with simulators. The code pattern to trigger this bug is also discouraged by Intel Optimization guides as being slow, so probably only coded very rarely by a compiler. Probably not a high priority on simulation experiments until now. Or 'We think there's a problem around this, let's discourage people from doing it'. One of the issues is apparently that Intel test their processors less than they used to.
Taking time to make sure they were behaving correctly was costing money and making them look slow No excuses or benefit of the doubt though for the utterly awful Windows update process that needs to be taken out back of the barn and shot. Sorry to ask, but have you followed the proper well-established procedures for troubleshooting bugchecks? Probably not, since you can't even tell if this issue can be related or not. I mean - you are aware that those letters and numbers on the blue screen are there for a reason, aren't you?
Though for serious debugging you will want a kernel dump as well There's no option to disable HyperThreading. So far the only things crashing on me are PulseAudio and bluetoothd, and I have no idea if they crash because of this bug or just because there are bugs that need to be ironed out in drivers or the software. I had to mix and match many Internet forum posts in order to win the battle.
I'm just schocked Nostradamus has not even vaguely reported this. We all know the Pentium FDIV bug was a big hit in , so why is there not even a teensie-weensie Quatrain about this one? Not even Hoagland has anything on it as of this writing. Are we looking at a new conspiracy, stemming from like hundred years ago? That would make it a Quarterly financial report Head Fake; must be a record: You know that you're not supposed to electronically post that list of random words used to recover your Ethereum wallet, right?
Everything about this new microcode bug affecting Intel CPUs looks beyond fishy. And AMD needs to sell the awful Ryzen products at any cost to not go bankrupt. So they come up with these lies to attack Intel trying to tell the world "you see Intel CPUs are not more reliable than ours" What a smart masterplan..
While I understand that this may be simple trolling or fanboy knee-jerk reaction, I still feel compelled to ask: Why did you actually type that flame out? My research lead me to several very long intel discussion forums of people experiencing similar crashing and not much help from Intel. So it's nice to see this is finally being acknowledged at least.
At least I have a potential working solution now disable hyperthreading , previous suggestions on the forums have not worked, e. You can load microcode after boot as well, from your favorite OS. Linux has a tool for it that runs on boot - t Think it's included with Debian but the actual microcode isn't since it's a non-free binary blob.
Guess I'm just damned if I do, damned if I don't at this point All processors are designed to have fixes applied as bugs are found, instead of having to "mask out" a new processor DIE each time, or slowing the process of releasing a new processor to 1 per decade. This is not a design flaw, it reduces costs if they can fix design flaws on the finished product after it is manufactured or even after it ships. Dozens of major and minor bugs have been fixed in the Microcode update prior to the first processor shipping, so running without these fixes is really really really bad.
When a bug is found during the extensive testing phase, a Microcode fix is designed to resolve that problem. And while we could complain about this not being found earlier, it is usually the support community that finds these obscure hard-to-find bugs that feedback into the CPU company for fixes.
Consider it the same as never updating a software package, even though known bugs are in it, without uninstalling the original software package and downloading and installing a whole new version.
This is installed as a driver, and in the event log you can see if a microcode update has been applied. You conveniently forgot to convey that Intel discovered the bogue a long time ago, and began pushing its microcode fix to OEMs and system builders in April I had one of the '16 bit only'-stamped ones in an old PC.
Reading this article, I have now turned Turbo-Boost back on and turning off Hyper-Threading instead to see if this solves the problem as well. Since turning off Turbo-Boost seems to fix the problem, I am wondering if that is a better solution than turning off Hyper-Threading.
According to the conditions that "should exist" for boosting to happen, it seems pretty rare that boosting "should" actually happen and losing half my processor threads seems like a bigger performance hit.
So for Linux users, there should be at least 2 update methods available without getting someone else to help you. But it is possible that the BIOS vendor or modifications specified by the motherboard vendor do not support these options. Not a member of The Register? Create a new account here. Remember me on this computer? The Register - Independent news and views for the tech community.
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Intel's Skylake and Kaby Lake CPUs have nasty hyper-threading bug During April and May, Intel started updating its processor documentation with a new errata note — and over the weekend we learned why: