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Linux May Need a Rewrite Beyond 48 Cores

An anonymous reader writes "There is interesting new research coming out of MIT which suggests current operating systems are struggling with the addition of more cores to the CPU. It appears that the problem, which affects the available memory in a chip when multiple cores are working on the same chunks of data, is getting worse and may be hitting a peak somewhere in the neighborhood of 48 cores, when entirely new operating systems will be needed, the report says. Luckily, we aren't anywhere near 48 cores and there is some time left to come up with a new Linux (Windows?)."

24 of 462 comments (clear)

  1. Error in their math by El_Muerte_TDS · · Score: 5, Funny

    They have an one-off error in their math, it's actually 9 times a 6 core CPU. So, at 42 cores a rewrite is needed.

    1. Re:Error in their math by Anonymous Coward · · Score: 1, Funny

      Dude, nobody makes jokes in base 13!

  2. Enough by wooferhound · · Score: 2, Funny

    640 cores ought to be enough for anybody . . .

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    We are Dead Stars looking back Up at the Sky
    1. Re:Enough by Anonymous Coward · · Score: 1, Funny
    2. Re:Enough by Abstrackt · · Score: 2, Funny

      lol i dont see why people cant be happy with a quad it gets the job done if you need more than 4 cores you should just shoot yourself

      I'll hand out guns to the scientists then. Maybe they'll be willing to donate their punctuation to you as well.

      --
      They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance. - Terry Pratchett
  3. Re:Original Source and Actual Paper by VorpalRodent · · Score: 4, Funny

    What does "(Windows?)" even mean?

    I read that as saying "Windows is the new Linux!". Clearly the submitter is trying to incite violence in the Slashdot community.

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    Take it to the limit, everybody to the limit, come on, everybody fhqwhgads.
  4. 48 cores? by drunkennewfiemidget · · Score: 4, Funny

    I'm still waiting for Windows to work well on ONE.

    1. Re:48 cores? by Beer+Drunk · · Score: 2, Funny

      Actually I'm rather pleased with Windows 7. It's a great improvement over their last few attempts and other than a few spurious reboots right in the middle of several hours work and often requiring me to force the *&#%$ drives to re-mirror it's not toooo bad. OK, I just use it on this box because there are a couple of programs I like not available for native Linux yet but at least it's not Vista or ME bad.

  5. Re:What are they talking about by Anonymous Coward · · Score: 1, Funny

    ... from the original MIT article it sounds like there is lock contention on shared memory reference counts. ... but I'm making that up.

  6. Who uses that by MSDos-486 · · Score: 2, Funny

    http://xkcd.com/619/

  7. Re:Original Source and Actual Paper by RCGodward · · Score: 3, Funny

    Don't bother checking the box, RMS, we know who it is.

  8. that's crazy by Punto · · Score: 2, Funny

    Nobody's every going to need more than 640 cores

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    Stay tuned for some shock and awe coming right up after this messages!

  9. Re:Original Source and Actual Paper by spazdor · · Score: 2, Funny

    Fuck, dude, we hurd you the first time. and "GNU Plus Linux" is terrible marketing.

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    DRM: Terminator crops for your mind!
  10. Re:Original Source and Actual Paper by UnknowingFool · · Score: 2, Funny

    it's to give the reader enough information to decide whether reading the full article is worth it.

    We are supposed to read the articles? Why didn't anyone tell me about this before?!!

    --
    Well, there's spam egg sausage and spam, that's not got much spam in it.
  11. Re:Original Source and Actual Paper by Gilmoure · · Score: 3, Funny

    Wait, Macs don't suck?

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    I drank what? -- Socrates
  12. Slashdot by carrier+lost · · Score: 3, Funny

    ...there is some time left to come up with a new Linux (Windows?).

    Windows, the new Linux.

    You read it here first...

  13. So what the fuck is he doing here then? by SmallFurryCreature · · Score: 5, Funny

    Lets drive the greenhorn OUT! No filthy high UID's with their spelling and gramar and solid well researched non-sensationlist writing. I want my editors to rape the language (bonus points if it is several languages at once) and sent my heart racing by raising my bile and fear of the unknown and known.

    Headlines sell adverts. Truth, accuracy, honesty do not. Accept it, you are reading slashdot, it works.

    --

    MMO Quests are like orgasms:

    You may solo them, I prefer them in a group.

  14. Re:Original Source and Actual Paper by Old97 · · Score: 2, Funny

    Wow, you've convinced me. I'm canceling all my plans to migrate to OS/2. Thanks.

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    Very often, people confuse simple with simplistic. The nuance is lost on most. - Clement Mok
  15. You're Welcome! by eldavojohn · · Score: 2, Funny

    However, posting your own post in your own post is a bit excessive, and there could have been better ways to do this than just repost your entire freakin story as the first comment.

    Yo dawg, I heard you liked my post so I put a post inside my post so you could enjoy it while you're enjoying my post!

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    My work here is dung.
  16. Re:Original Source and Actual Paper by The+Wild+Norseman · · Score: 2, Funny

    SGI runs Single System Image Linux systems with over 1000 cores, that's not the problem.

    640 cores should be enough for anyone.

    --
    "A government is a body of people usually -- notably -- ungoverned." -Shepherd Book
  17. Re:Obligatory xkcd reference by RyuuzakiTetsuya · · Score: 2, Funny

    If you have 4,096 CPUs I don't think that "smooth flash playback" is a problem.

    4,095 CPUs however...

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    Non impediti ratione cogitationus.
  18. Re:Original Source and Actual Paper by gtall · · Score: 2, Funny

    Nah, jokes like "64xx should be enough for anybody" actually suck the humor out of the reader due to old age. The GP is probably an inmate in the Home for the Terminally Bland.

  19. Re:Original Source and Actual Paper by mjwx · · Score: 2, Funny

    The thing is eldavojohn practically *is* an editor for /. , just check out his submission page. Despite having such a high UID he's got a solid reputation, a good writing style, and offers good commentary on a wide variety of topics.

    Which is exactly why he _cant_ be a /. editor.

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    Calling someone a "hater" only means you can not rationally rebut their argument.