Changes between Version 12 and Version 13 of Status/May11


Ignore:
Timestamp:
Apr 20, 2011 9:45:14 PM (3 years ago)
Author:
ezyang
Comment:

update my section

Legend:

Unmodified
Added
Removed
Modified
  • Status/May11

    v12 v13  
    6161  '''Simon Marlow: any update?''' Previous entry: ''Simon Marlow is working on a new garbage collector that is designed to improve scaling of parallel programs beyond small numbers of cores, by allowing each processor core to collect its own local heap independently of the other cores.  Some encouraging preliminary results were reported in a [http://hackage.haskell.org/trac/ghc/blog/2010/9#new-gc-preview blog post].  Work on this continues; the complexity of the system and the number of interacting design choices means that achieving an implementation that works well in a broad variety of situations is proving to be quite a challenge.'' 
    6262 
    63   '''ezyang: any update?''' Previous entry: ''The "new back end" is still under construction.  This is a rewrite of the part of GHC that turns STG syntax into C--, i.e. the bit between the Core optimisation passes and the native code generator.  The rewrite is based on [[http://research.microsoft.com/en-us/um/people/simonpj/papers/c--/dfopt.pdf Hoopl]], a data-flow optimisation framework.  Ultimately this rewrite should enable better code generation.  The new code generator is already in GHC, but turned off by default; you get it with the flag `-fuse-new-codegen`.  Don't expect to get better code with this flag yet!'' 
     63  The new code generation backend (`-fuse-new-codegen`, the rewrite of the part of GHC that turns STG syntax into C--) has seen a flurry of work, spearheaded by Edward Z. Yang. At this point, we’ve ironed out most of the bugs in the backend, and now we’re working on new optimization passes and fixing inefficiencies to get the generated code as good (or better) than the old code generator.  We’re still not at the point where the new code generator will generate better code, but we’re pretty close! 
    6464 
    6565== The Parallel GHC Project ==