Nevermind the iPhone – everyone's computer is going to slow down a lot
Unless you have an AMD CPU – then you can feel smug right now.
This is a major **** up by Intel – very very bad and with no fix other than to use a clumsy o/s fix that will slow everything down.Posted 2 months ago
z1ppy – Member
yep was told about this earlier, not sure if the article mentioned it but potentially 2-30% performance hit, though I believe the 30% is only for (very) specialist tasks in linux.
Anything that does a significant amount of system calls (i.e. mostly everything) will be affected. 30% seems unlikely except for very odd workloads though.
Must say I’m not overly impressed with Intel of late, after this and learning of the IME exploits.
ETA: if i’m reading the postgres example correctly, what they’re timing is how fast their DB can connect and essentially do nothing (well, return a 1 anyway), and it’s over a loop back, so no network overhead, minimal work to parse the sql and no i/o. In other words it’s probably not too relevant to most database applications.Posted 2 months ago
EDIT: Me and wwaswas playing snap!
It was back in November, by the looks of it, probably when he had a good idea of what was coming down the track, but the markets didn’t.
A class action of some kind is inevitable if people start seeing 30% drops in CPU performance.Posted 2 months ago
nothing we haven’t seen before.
Maybe this is fake news put out by Intel to get people to buy new processors…
No, this is a very significant security flaw and the only processors people will be buying as a result of it are AMD ones.
The reason for the performance hit is because the only way to deal with the issue to prevent the CPU from undertaking certain tasks that it would normally do that speed everything up.
This is right down at microcode level – deep deep within the CPU. This is not a fudge or fake news. Trust me – it *could* send Intel under.Posted 2 months ago
No windows benchmarks yet, but bad news for servers, SQL etc: https://www.phoronix.com/scan.php?page=article&item=linux-415-x86pti&num=2
Gonna be a lot of angry data centers with angry customers.Posted 2 months agojolmesMember
Likely hood of the CEO knowing about this is high, reported that OS programmers knew about it and was trying to fix it back end of November early December. Selling his stock seems very fishy now. They brought forward all their new cpu’s to 2017 because AMD’s Ryzen chip was better than expected on all accounts, if that has anything to do with it. Faulty rushed coding?Posted 2 months agobrassneckSubscriber
The CEO of Intel sold a large amount of his stock in the company yesterday.
I lol’d. Can that be legal? Even if he holds the minimum required of a CEO, surely its some kind of insider dealing.
This going to break the internet quicker than Kardashians with Kittens. Or sell AMD 17-30% more CPUs …Posted 2 months ago
Normal users don’t seem to be hit, but the server market is thier bread and butter:Posted 2 months agoCougarSubscriber
Everything from Clarkdale/Westmere (2010) onward, so yes effectivley all of them unless youve got a really old PC/server
Looks like I’ll be fine, then. (-: Mine’s… Penryn I think, off the top of my head.
I wonder, will they be patching all OSes, or just the ones with affected CPUs? Kind of a bit shit being forced to patch a vulnerability I don’t have.Posted 2 months agooldnpastitMember
I wonder, will they be patching all OSes, or just the ones with affected CPUs? Kind of a bit shit being forced to patch a vulnerability I don’t have.
The Linux kernel option can be disabled on the kernel boot line, and there’s a patch floating around to disable it for AMD.
It also affects Aarch64.Posted 2 months agospooky_b329Member
The fix is to separate the kernel’s memory completely from user processes using what’s called Kernel Page Table Isolation, or KPTI. At one point, Forcefully Unmap Complete Kernel With Interrupt Trampolines, aka ****, was mulled by the Linux kernel team, giving you an idea of how annoying this has been for the developers.
I was about to return my laptop as the speakers have gone all crackly…got another 18 months on the warranty so I might hold fire incase they end up replacing it with an updated processor!Posted 2 months ago
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