4 ms·

GHC 7 is released. with LLVM, improved inliner, improved thread scheduler ...

98 points by dons 16y ago

oconnor0 16y ago
I didn't see, in the release notes (http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/release-7-0-2.html http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/relea...), any mentions of improved inlining or thread scheduling. Do you have a link to that?
- chalst 16y ago
  Those came with ghc 7.0.1. http://www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html http://www.haskell.org/ghc/docs/7.0.1/html/users_guide/relea... Previously on HN: http://news.ycombinator.com/item?id=1908503 http://news.ycombinator.com/item?id=1908503
oconnore 16y ago
Why is GHC doing thread scheduling?
- fp 16y ago
  Haskell (GHC at least) has lightweight user-level threads, similar to Erlang.
- bretthoerner 16y ago
  (Disclaimer: I've never programmed Haskell or used GHC outside of Xmonad) I'm pretty sure they use a M:N language-thread to OS-thread system. So they need to decide what thread to put "on" an OS-thread at any given time.
- dons 16y ago
  GHC provides a parallel programming model, * K sparks scheduled over * M lightweight threads scheduled onto * N OS threads over * C hardware cores. The runtime manages this, and does load balancing.
mxavier 16y ago
I'm confused. Their site says GHC 7.01 was released in November 2010. This release is 7.02.
- dons 16y ago
  7.0.1 was the release candidate for 7.0.2 (stable).
  - koenigdavidmj 16y ago
    Sounds like they learned their release numbering skills from the KDE folks.
    - rtaycher 16y ago
      I'm not sure if they do it but many projects use odd=unstable,even=stable version schemes including GNOME.
      - JoachimSchipper 16y ago
        Yes, but that's usually in the second digit (e.g. 2.4 is stable, 2.5 is development) - switching from unstable to stable in a nominal patch release (third digit) is at least uncommon.
- batterseapower 16y ago
  Yes, the title is confusing. GHC 7.02 is significant because it will be included in the next Haskell Platform release -- GHC 7.01 was only available separately, and was not much installed. GHC 7.01 was also a time of upheaval in the code base, with an almost total rewrite of the type checker. This was a bit buggy at first, but early experience with 7.01 means that it is much more polished in 7.02. The full changelist from 7.0.1 is modest and available at http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/release-7-0-2.html http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/relea...
aufreak3 16y ago
awaiting the haskell platform release to get the next GHC ..
motxilo 16y ago
How does this LLVM integration work? Is just a Haskell->LLVM compiler?

98 points by dons 16y ago

I didn't see, in the release notes (http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/release-7-0-2.html http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/relea...), any mentions of improved inlining or thread scheduling. Do you have a link to that?

chalst 16y ago
Those came with ghc 7.0.1. http://www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html http://www.haskell.org/ghc/docs/7.0.1/html/users_guide/relea... Previously on HN: http://news.ycombinator.com/item?id=1908503 http://news.ycombinator.com/item?id=1908503

oconnore 16y ago

Why is GHC doing thread scheduling?

fp 16y ago
Haskell (GHC at least) has lightweight user-level threads, similar to Erlang.
bretthoerner 16y ago
(Disclaimer: I've never programmed Haskell or used GHC outside of Xmonad) I'm pretty sure they use a M:N language-thread to OS-thread system. So they need to decide what thread to put "on" an OS-thread at any given time.
dons 16y ago
GHC provides a parallel programming model, * K sparks scheduled over * M lightweight threads scheduled onto * N OS threads over * C hardware cores. The runtime manages this, and does load balancing.

mxavier 16y ago

I'm confused. Their site says GHC 7.01 was released in November 2010. This release is 7.02.

dons 16y ago
7.0.1 was the release candidate for 7.0.2 (stable).
- koenigdavidmj 16y ago
  Sounds like they learned their release numbering skills from the KDE folks.
  - rtaycher 16y ago
    I'm not sure if they do it but many projects use odd=unstable,even=stable version schemes including GNOME.
    - JoachimSchipper 16y ago
      Yes, but that's usually in the second digit (e.g. 2.4 is stable, 2.5 is development) - switching from unstable to stable in a nominal patch release (third digit) is at least uncommon.
batterseapower 16y ago
Yes, the title is confusing. GHC 7.02 is significant because it will be included in the next Haskell Platform release -- GHC 7.01 was only available separately, and was not much installed. GHC 7.01 was also a time of upheaval in the code base, with an almost total rewrite of the type checker. This was a bit buggy at first, but early experience with 7.01 means that it is much more polished in 7.02. The full changelist from 7.0.1 is modest and available at http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/release-7-0-2.html http://www.haskell.org/ghc/docs/7.0.2/html/users_guide/relea...

aufreak3 16y ago

awaiting the haskell platform release to get the next GHC ..

motxilo 16y ago

How does this LLVM integration work? Is just a Haskell->LLVM compiler?