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New RIDL vulnerability hits Intel - Advises Disabling Hyper-Threading Below 8th, 9th Gen CPUs

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, May 14, 2019.

  1. mbk1969

    mbk1969 Ancient Guru

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    Because the attacks on home user computer and on server computer are completely different. It is much harder to attack servers. And overall RIDL/MDS is not vulnerability which makes easier to attack computers.
     
  2. Dribble

    Dribble Member

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    If you read my previous post I gave you an example of how easy it is to attack a server farm in the cloud - just rent some time on any cloud based service - something you can setup in a few minutes for a few $. That gets you onto a machine that if you can take over will then run all sorts of other businesses software, or now you control 1 machine and are inside the clouds internal network will then allow you to attack the rest.
     
  3. chispy

    chispy Ancient Guru

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    From Tom's Hardware: Source - https://www.tomshardware.com/news/intel-amd-mitigations-performance-impact,39381.html

    From Fudzilla: Source - https://www.fudzilla.com/news/pc-ha...ctre-and-meltdown-mitigation-slow-intel-chips

    From Phoronix: Source - https://www.phoronix.com/scan.php?page=article&item=mds-zombieload-mit&num=1

    Phoronix has been testing chips to see how bad Spectre and Meltdown patches harmed the performance of CPUs and the news is horrible for Intel.

    Phoronix benchmarked across multiple Intel platforms, including the 6800K (Broadwell-E), 8700K (Coffee Lake), 7980XE (Skylake-SP), Ryzen 7 2700X, and Threadripper 2990WX.

    It found while the impacts vary tremendously from virtually nothing too significant on an application-by-application level, the collective whack is ~15-16 per cent on all Intel CPUs without Hyper-Threading disabled. Disabling increases the overall performance impact to 20 per cent (for the 7980XE), 24.8 per cent (8700K) and 20.5 per cent (6800K).

    The AMD CPUs were not tested with HT disabled, because disabling SMT isn’t a required fix for the situation on AMD chips, but the cumulative impact of the decline is much smaller. AMD loses just three per cent with all fixes enabled. The impact of these changes is enough to change the relative performance weighting between the tested solutions. With no fixes applied, across its entire test suite, the CPU performance ranking is:

    1. 7980XE (288)
    2. 8700K (271)
    3. 2990WX (245)
    4. 2700X (219)
    5. 6800K. (200)

    With the full suite of mitigations enabled, the CPU performance ranking is:

    1. 2990WX (238)
    2. 7980XE (231)
    3. 2700X (213)
    4. 8700K (204)
    5. 6800K (159)

    AMD, in other words, now leads the aggregate performance metrics, moving from 3rd and 4th to 1st and 3rd. The cumulative impact of these patches could result in more tests where Intel and AMD switch rankings because of performance impacts that only hit one vendor
     
  4. mbk1969

    mbk1969 Ancient Guru

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    Why do you think that renting a machine in the cloud gives easy way to hack the whole cloud? Are you a hacker or at least a specialist on cloud stuff?
     

  5. tsunami231

    tsunami231 Ancient Guru

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    yah this ridiculous I told my uncle about this crap and he say he dont care, he dont want windows doing updates anyway. but he want to move away from intel too.

    I said once before I will way it again. majority of people wont know about this stuff and majority of those people that do probably wont know how to go about pluging things manually, and as such unless MS literately plug all this stuff with there "updates" and MS updates have been sketchy at best lately at at worse causing system to not boot and "system restore" failing at is purpose. Some of this stuff will never be plugged with out Intel issuing fixes in first place. and Intel dont seem to care enough to plug all these issue on all there effect cpu. then again the older the cpu the more hit there is on cpu. and I bet if they did plug it on some of the older cpu will really brutalize the cpu performance back to the stone age.

    which leave the "probably" 1% that do know about this stuff and have knowledge and will to manual plug this stuff. And some of use dont even want the fixes cause they performance hit are obvious to them. Intel just seem to be getting hit after hit, and they still trying run business as usual.

    I know I asked this before but i not sure if it been answer, but has Intel said anything about this? as thing stand right here right now, my next pc will be AMD Ryzen, I dont see performance hit just yet on my 6700k but sooner or later I will cause it will add up at some point.
     
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  6. MasterBash

    MasterBash Master Guru

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    Ryzen 3000 cant come out soon enough. Since 2018, my PC has slowed down greatly with all those fixes (4770k)... Its definitely very noticeable.
     
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  7. fantaskarsef

    fantaskarsef Ancient Guru

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    Thanks for sharing, that clearly shows that Intel CPUs are not not necessarily the fastest around in every segment. And it shows that over the years I've lost performance with Intel far more than if I'd have taken an AMD system back then.
    It also gives us a hint of what will happen next: Probably more exploits who's fixes cripple Intel more than AMD, if they touch AMD at all.
    I can't see why it's not the logical consequence of many people, not all, to switch to AMD with their upcoming releases if they perform well enough. AMD might be "the safer bet" not only because of security these days, but also about performance, especially beyond 1080p gaming.
     
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  8. typhon6657

    typhon6657 Master Guru

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    I just ran some on a patched HP 8200 elite with i7 2600. Performance was almost the same.
     
  9. moo100times

    moo100times Active Member

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    I'm glad for you. Since the last update even opening video or audio from browser or system is causing a 1 second freeze when previously no lag or issues, even with multiple software open. Cannot even play enter the gungeon with chrome open now due to ridiculous game slowdown.
     

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