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A comment on GHC 7 is out: Haskell 2010 support; LLVM backend; new optimizer ....

Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by ch on Monday November 15, 2010 @10:16PM (#1908868)
Fantastic work. The improvements to the I/O manager are well worth the price of admission.

I'm curious, is work underway to see similar gains made in the I/O manager on Windows?

Does Windows provide a similar construct as 'select()' and also something equivalent to the newer epoll/kqueue systems, such that boosting the I/O manager on Windows will be rather trivial, or is the Windows I/O subsystem so different that the GHC I/O manager must be designed completely differently on that platform?

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Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by pufuwozu on Tuesday November 16, 2010 @12:01AM (#1909111)
The Windows operating system presents a difficulty to our current design. Its support for scalable event notification is based around I/O completion ports, which are integrated tightly with the Windows threading mechanism, and which would require a considerable amount of replumbing to support.

From http://www.serpentine.com/bos/files/ghc-event-manager.pdf

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Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by tibbe on Tuesday November 16, 2010 @07:21AM (#1909840)
We need a Windows user who's willing to drive it. Bryan and I are happy to apply patches but neither of us are Windows developers.
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Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by ch on Tuesday November 16, 2010 @09:50AM (#1910182)
Sadly I too am not a Windows developer. That said, I've never before had such a compelling reason to become one.

I do hope that someone more familiar with Windows takes up the torch.

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Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by stonemetal on Tuesday November 16, 2010 @09:59PM (#1912714)
I would but I can't quite figure out GHC's build process.
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Re:GHC 7 is out: Haskell 2010 support; LLVM backend; new opt... by stonemetal on Tuesday November 16, 2010 @07:16AM (#1909831)
Windows provides select just like everybody else. High performance IO in windows is done with IO Completion Ports it is a little more complicated than epoll.
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