Linux 4.20 is Running Slower Than 4.19 On Intel CPUs (phoronix.com)
Freshly Exhumed writes: An intentional kernel change in Linux kernel 4.20 for enhanced Spectre mitigation is unfortunately causing Intel Linux performance to be much slower than with 4.19. That change is 'STIBP' (Single Thread Indirect Branch Predictors), which allows for preventing cross-hyperthread control of decisions that are made by indirect branch predictors. It affects Intel systems that have up-to-date microcode and CPU Hyper Threading enabled. Phoronix gives the evidence.
Let the class action lawsuits begin?
It's just high.
There's a joke here somewhere. If I weren't so stoned...
They say the first thing to go is your penis. Well, it's either that or your brain. I forget which...
This is what Linux gets for pushing a CoC. Linus' kool aid drinking has finally proven his lack of judgement in a way BitKeeper, the scsi subsystems, and assigning Greg KH as stable maintainer haven't.
Can this be disabled with modules or would it need a flag and a recompile of the kernel?
BRING BACK MEAN LINUS
You're still gonna do your banking over encrypted channels. And use fixed length arrays or at least bounds checks.
This headline seems to come from the mindset that we always act like Joe Sixpack has.
(In reality, the average person out there cares just as much about security and privacy. They just know less about it and have less of a choice with "simple" products anyway. Buut you'll get them there, if you keep pushing that meme. Just like Justin Bieber was made popular mostly by everyone hating him [including me].)
But go ahead, and keep using the old kernel. Don't be surprised if your IP block is suddenly blocked though, when your zombie computer starts spreading crap. Or if go to prison for child pornography when somebody finds out what it spread.
Wooohooo!
Linux kernel doesn't let your insecure and sloppy design do things that compromise the security of the OS. Sounds like a feature to me.
Who still runs Linux on Intel CPUs?
...running slower and secure or faster and compromised ?
If you think faster is better then you're a moron that should not have access to a computer!
AMD for the WIN!! will apple move mac pro over?
Yeah, it doesn't make sense at all. ;)
"Truth is what works" -- William James "It works!!" -- o-dark-AM comment
You can easily disable this patch with a boot command-line argument. Unless you are running a heavily VM-ed data center with shit for security, why would you cripple your system over the most esoteric hacks known to man and that - Oh! By the way! - require that you are running malware on your system already? (And spare me the horseshit about JS - that can ONLY happen in a carefully crafted environment.)
There is now a price to pay. Not really a surprise.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
Seriously, you might think you're so cool by annoying the other users but I for one am concerned for your health. Do you need medication or some other kind of help? It isn't normal to paste that stuff into every article.
A-fucking-men.
So technically not ALL Intel cpus.. I finally dodged one of the many bullets, I should buy a lottery ticket.
Fuck Intel.
Says the guy who has 99% of his posts modded to zero or less.
#savelinus
Intel CPUs performance suffers for its bug mitigation in linux kernel 4.20.
apk is a mentally ill person. His posts ebb and flow according to what's going on with his condition. It's usually best just to ignore him.
Old, vulgar Linus would have never allowed that!
I thought Google had figured out a patch to circumvent this at the OS level that had negligible impact on performance?
My Other Computer Is A Data General Nova III.
I never pay that much attention to benchmark numbers. I don't max my PC out for much so incremental differences are hardly something noticeable. Yeah you can definitely argue a good 10 to 15% loss from everything added together with regards to Spectre/meltdown fixes.
Seems to me Google came up with Retpoline which some Linux OS run with minor performance hits. Even Windows 10 will implement this in Spring release. Wonder why all Linux desktop OS don't implement Retopline?
I've always kinda thought of him as "He who shall not be named" because as soon as you type the letters A...P...K.
See the comments below
I've just discovered that my penis is leaking fondant. At least it's tasty.
Probably slower cuz it is stoned ...
TempleOS FTW
pre-USADA Linus was the GOAT, like Ken Shamrock with faster fingers.
Linus broke userspace? The users that are impacted will need a lot of mustard to choke down this shit sandwich. Intel needs to get off of their ass and at least tell us something instead of sending us down huxter highway with their next bullshit broken part.
Fuck ignoring him, drive him insane until he fucking snaps and kills someone or himself.
The slowdowns are part of a planned obsolence, sales are down and the industry lies and fakes almost everything to get a new sale.
That includes ruining existing hardware with so called security bugs that need fixing while on the backdoor-side more exploits are added.
The industry thinks everyone is stupid, like they are themselves. People thinking they are fooling others when they are not.
That's right, they made their name by knowingly using bugged technology. "See how fast our cpu are !! We are the fastest..."
When those bugs get patched, they are no longer the fastest with the highest IPC count ..and so on.
Who will punish them for those blatant lies ? Sue em and fine them till kingdom come.
So, abandon systemd? There is nearly a hundred distros NOT using it, what are you waiting for? http://without-systemd.org/
Artix
Your Linux, your init.
1st U FAIL a PORTFILTERING TEST https://yro.slashdot.org/comme... (IF hosts could DO it I'd implement it in my work & I STOP THAT ERROR - test for yourself & see using my program) & Hosts can stop portsmash (blocking downloads of it) "You basically have to already be able to run your own evil code on a machine in order to PortSmash it." from https://www.theregister.co.uk/...
* In fact, hosts MAY prevent the OTHER forms of Intel CPU weakness per ACADEMIC RESEARCH I read:
SPECTRE "As an attempted mitigation for our JavaScript-based attack" https://spectreattack.com/spec...
MELTDOWN "We presented Meltdown, a novel software-based attack" https://meltdownattack.com/mel...
APK
P.S.=> Like portsmash? Academics NEEDED TO RUN CODE LOCALLY like portsmash which hosts can prevent harm to you via Spectre/Meltdown - & the ONLY thing I question would be can something like RPC make them work (that MAY be considered 'remote')... apk
Zach Paterson/ZIP + c6gunner 'Greatest Hits': "I'm a much better programmer than APK" - by Anonymous Coward ZIP on Monday October 08, 2018 @11:27PM (#57449082)
BIG TALK - ZIP has no programs to show as proof.
I do https://news.slashdot.org/comm...
(From registered /.ers liking/using/praising my work + 100k users worldwide)
ZIP tried to take credit for what I solved before him https://tech.slashdot.org/comm...
He codes? He can't EVEN READ!
I show 2 ways to do it YOURSELF https://tech.slashdot.org/comm... - he can't.
Delphi/FreePascal/ObjectPascal HAS no null-term'd string bufferoverflows https://developers.slashdot.or... - C does, C++ can UNLESS you do what I said 1st.
He likes CODE SIGNING (it's been STOLEN & ABUSED) https://www.helpnetsecurity.co...
MY METHOD CAN'T BE (upmodded +2 INTERESTING in CODING FOR DEFCON) https://it.slashdot.org/commen...
ZIP says he has no /. acct "I don't have an account so I don't have mod points" https://news.slashdot.org/comm...
Yet ZIP says he downmods me (IMPOSSIBLE w/ no /. acct.): "I down-modded a few of your post" - by Anonymous Coward "ZIP" on Thursday October 11, 2018 @11:31AM (#57461058)
APK
P.S.=> KEEP IMPERSONATING ME like https://science.slashdot.org/c... (I'd never say that OR bitch to do-NOTHING "ne'er-do-wells" like ZIP OR c6gunner https://linux.slashdot.org/com... (he 1st mocked me & impersonated me TWISTING /.ers words & after I FAIRLY challenged him to show HE DID BETTER & that was his response (weak))!
Above EXPOSES your BLOWHARD incompetence... apk
amyn to that! what a horrible excuse for a humyn. there should be laws myndating people be more polite to each other.
... intel finally being punished... for their cheats... now their chips are truely junky/slowly...wieeeeee
further spectre mitigation code is causing these slow down issues.
it's discussed in a follow up phoronix article.
On a long enough timeline, the survival rate for everyone drops to zero.