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Another Intel CPU vulnerability

Discussion in 'CPUs' started by Wommers, May 14, 2019.

  1. Wommers

    Gangster

    Joined: Feb 19, 2018

    Posts: 139

  2. MyBrains

    Wise Guy

    Joined: Jan 30, 2012

    Posts: 2,074

    Location: Stoke On Trent

    Glad i moved from a 6700K to a 2700X last year when i did.. so many of these keep popping up.
     
  3. Aretak

    Wise Guy

    Joined: May 26, 2014

    Posts: 1,704

    Google have taken the step of disabling Hyperthreading in Chrome OS in response (though have provided a flag to turn it back on if you desire). The Ubuntu team are also recommending disabling it. I don't suppose many people using desktops for gaming will do so, but it does seem at this point that it's swiss cheese in terms of security. One of the researchers involved says a ground-up redesign is needed.
    Dutch link

    /edit/ Also a claim from Apple that full mitigation could decrease performance by up to 40%. :eek:
     
  4. pete910

    Wise Guy

    Joined: Oct 3, 2013

    Posts: 2,466

    Damn, just posted this in the other thread
     
  5. HellDiverUK

    Associate

    Joined: Jun 28, 2017

    Posts: 98

    Apple are just going to turn of Hyperthreading, same as ChromeOS, then. 40% is about what HT adds to performance.
     
  6. smilingcrow

    Hitman

    Joined: Apr 27, 2007

    Posts: 591

    On average it's less than that surely?
     
  7. beany_bot

    Mobster

    Joined: Nov 19, 2015

    Posts: 3,880

    Location: Glasgow Area

    So Intel now will have a flagship 8c/8t mainstream chip whereas AMD is about to release a 16c/32t chip lol. And Zen 3 will apparently have 4 threads per core. Intel be in such trouble.
     
  8. Stephanie Peterson

    Hitman

    Joined: Jan 9, 2019

    Posts: 713

    Ohh what crap intel now find themselves in, serves them right.

    Benchmark tables for upcoming cpu's over the next year or so might be rather worrying looking for team blue, still something needs to hold up the bottom of the table and for too long it was all red.
     
  9. pete910

    Wise Guy

    Joined: Oct 3, 2013

    Posts: 2,466

    Doubt it, They just wont run the benchies with the mitigations ect then hide the fact in the really fine print on page 90 of the article
     
  10. dragonslayer

    Gangster

    Joined: Jul 9, 2012

    Posts: 353

    Location: Nottingham

    Wow another one!?!? I wonder how well bulldozer does now Vs 2500k etc for those who didn't have the cash to uograde:D:D also would be very interesting to see how Ryzen now holds up against the 9900k
     
  11. smilingcrow

    Hitman

    Joined: Apr 27, 2007

    Posts: 591

    Very good timing for AMD with Zen 2 to be announced hopefully in less than 2 weeks.
    For some sitting on the fence this could be the final straw!
     
  12. Rainmaker

    Sgarrista

    Joined: Aug 18, 2007

    Posts: 8,060

    Location: Liverpool

    Or, as per the meme I made for the other thread about this, my expensive Core i7 8700k just became a very expensive i5; even after already losing about 30% performance post-purchase thanks to Spectre and Meltdown 'mitigation'. Roll on the 3850X. :p

    ETA:

    Indeed. Lisa Su must be rubbing her hands together with glee. I was already planning to jump to Ryzen, and those in the know have been recommending HT be disabled for some time (see: Theo Radt of OpenBSD/openssl/openssh fame). This though, will I think be the push the mainstream needed to move over to team red in larger numbers. Funny, to me, how this gets so much attention but SPOILER (which is again silicon level and can't be mitigated at all) barely raises an eyebrow.

    On the plus side, at least the Intel die hard fans on here mean I'll still get decent resale on my 8Pack 8700K in the MM. :p
     
    Last edited: May 15, 2019
  13. Panos

    Sgarrista

    Joined: Nov 22, 2009

    Posts: 9,778

    Location: Under the hot sun.

    FYI. OpenBSD has deactivated Intel HT support since 19 June 2018. Because they cannot guarantee security, of what is actually the most secure OS used by security companies!!!!
     
  14. Beren

    Mobster

    Joined: Jul 30, 2004

    Posts: 2,832

    Location: Auckland

    "Intel unveiled yet another speculative execution side-channel flaw in its processors. The vulnerability affects most of the company’s processor SKUs, except the 8th and 9th generation chips, which Intel said includes hardware mitigations against this flaw." - So are the 8*** and 9*** series intel chips immune? The article suggests that it is all chips with multithreading apart from Whiskey lake and atom - it makes intels comment a little disingenuous.

    It sucks to see Intel this hamstrung, I guess this is what happens when you sit on fundamentally the same architecture for this long - but I do feel for users that are on an older platform and now have a choice about really gimping performance or making an unplanned upgrade. I want AMD to take the lead as it is healthy for competition and they have done something that really pushes computing forward. This is going to be a massive push for anyone on 7 series and below intel chips to jump ship - and potentially give AMD Epyc and Ryzen 3*** an even bigger push moving forward.
     
    Last edited: May 16, 2019
  15. edscdk

    Soldato

    Joined: Jul 17, 2008

    Posts: 6,575

    Is this a real issues for home users?
     
  16. beany_bot

    Mobster

    Joined: Nov 19, 2015

    Posts: 3,880

    Location: Glasgow Area

    I genuinely don't think she is that kind of person. It is serendipitous timing yes. But I would imagine she wants success to come from AMD doing great things. Not because Intel F'ed up.
     
  17. Tee Hee Johnson

    Mobster

    Joined: May 30, 2007

    Posts: 3,869

    Location: Glasgow, Scotland

    Nope.
     
  18. d_brennen

    Capodecina

    Joined: Jan 30, 2009

    Posts: 15,176

    Location: Aquilonem Londinensi

    No but it's mighty annoying if you host other people's data or anything remotely sensitive. It's only a matter of time until there is a massive class action in the States, surely
     
  19. RavenXXX2

    Capodecina

    Joined: Oct 6, 2007

    Posts: 17,249

    Location: North West

    You will see a 3% loss in performance.
     
  20. Tee Hee Johnson

    Mobster

    Joined: May 30, 2007

    Posts: 3,869

    Location: Glasgow, Scotland

    Might.