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TimSweeneyEpic's profile
Tim Sweeney
Tim Sweeney
Tim Sweeney
@TimSweeneyEpic

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Tim Sweeney

@TimSweeneyEpic

Epic Games founder & CEO

epicgames.com
Joined August 2013

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    1. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @ssylvan @TimSweeneyEpic

      It would be nice if you could have a sort of hybrid thread/process model with the same page table virtual to physical mappings but context-switched page protections to enforce per-thread heap separation and message passing hand-off.

      2 replies 0 retweets 1 like
    2. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @pervognsen @ssylvan @TimSweeneyEpic

      With PCID-tagged TLB you should be able to do that pretty easily. Maybe it's too expensive to do protection hand-off for message passing since that requires flushing the TLB entry for that, so you just leave those fully shared.

      1 reply 0 retweets 0 likes
    3. Sebastian Sylvan‏ @ssylvan 17 Jan 2018
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      Replying to @pervognsen @TimSweeneyEpic

      Presumably this GC malarkey is happening in some new language? If so, software enforcement a la Rust seems like a nice approach.

      1 reply 0 retweets 0 likes
    4. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @ssylvan @TimSweeneyEpic

      Eh, call me old fashioned, but Rust isn't my cup of tea. :)

      2 replies 0 retweets 0 likes
    5. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @pervognsen @ssylvan @TimSweeneyEpic

      Anyway, I want it to be pretty agnostic of the host language and be able to interop cleanly with other languages, and this stuff really helps with that.

      1 reply 0 retweets 0 likes
    6. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @pervognsen @ssylvan @TimSweeneyEpic

      I should mention, though, that all of Oberon is done without interior pointers. Bounds-checked arrays and array indices all the way. There's a direct read/write memory function escape hatch, but that's almost never used, and he wrote the OS like that.

      1 reply 0 retweets 1 like
    7. Sebastian Sylvan‏ @ssylvan 17 Jan 2018
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      Replying to @pervognsen @TimSweeneyEpic

      The Oberon spec is a pretty amazing read. It's like ten pages for the whole language.

      1 reply 0 retweets 0 likes
    8. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @ssylvan @TimSweeneyEpic

      Yeah. I know I've harped on this repeatedly, but if Wirth's way of programming hadn't become unfashionable and people still learned from his work (and he's still producing), we'd all be better off.

      1 reply 0 retweets 1 like
    9. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @pervognsen @ssylvan @TimSweeneyEpic

      I read something recently from Bertrand Meyer (Eiffel) who was a colleague of Wirth at ETH and it seems they had some deep philosophical disagreements about software engineering.

      1 reply 0 retweets 0 likes
    10. Per Vognsen‏ @pervognsen 17 Jan 2018
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      Replying to @pervognsen @ssylvan @TimSweeneyEpic

      And Meyer had some shitty rejoinder like "small languages are for small problems". And I just wanted to punch the monitor.

      4 replies 0 retweets 3 likes
      Tim Sweeney‏ @TimSweeneyEpic 17 Jan 2018
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      Replying to @pervognsen @ssylvan

      WWWD should be the governing principle in language design.

      1:16 AM - 17 Jan 2018
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      • John Carmack Per Vognsen Sebastian Sylvan
      0 replies 0 retweets 3 likes

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