[commit: ghc] master: Two step allocator for 64-bit systems (0d1a8d0)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/0d1a8d09f452977aadef7897aa12a8d41c7a4af0/ghc

>---------------------------------------------------------------

commit 0d1a8d09f452977aadef7897aa12a8d41c7a4af0
Author: Giovanni Campagna <gcampagn at cs.stanford.edu>
Date:   Fri Jul 17 11:55:49 2015 +0100

    Two step allocator for 64-bit systems
    
    Summary:
    The current OS memory allocator conflates the concepts of allocating
    address space and allocating memory, which makes the HEAP_ALLOCED()
    implementation excessively complicated (as the only thing it cares
    about is address space layout) and slow. Instead, what we want
    is to allocate a single insanely large contiguous block of address
    space (to make HEAP_ALLOCED() checks fast), and then commit subportions
    of that in 1MB blocks as we did before.
    This is currently behind a flag, USE_LARGE_ADDRESS_SPACE, that is only enabled for
    certain OSes.
    
    Test Plan: validate
    
    Reviewers: simonmar, ezyang, austin
    
    Subscribers: thomie, carter
    
    Differential Revision: https://phabricator.haskell.org/D524
    
    GHC Trac Issues: #9706


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0d1a8d09f452977aadef7897aa12a8d41c7a4af0
 configure.ac                                       |  36 ++
 includes/rts/storage/MBlock.h                      | 194 +---------
 rts/Sparks.c                                       |   1 +
 rts/posix/OSMem.c                                  | 200 +++++++++--
 rts/sm/BlockAlloc.c                                |  14 +-
 rts/sm/GC.h                                        |   2 +
 .../rts/storage/MBlock.h => rts/sm/HeapAlloc.h     |  65 ++--
 rts/sm/MBlock.c                                    | 399 +++++++++++++++++++--
 rts/sm/OSMem.h                                     |  41 +++
 rts/win32/OSMem.c                                  |  77 +++-
 testsuite/tests/rts/Makefile                       |   4 +-
 testsuite/tests/rts/all.T                          |   7 +
 testsuite/tests/rts/outofmem.stderr-ws-64          |   2 +-
 testsuite/tests/rts/outofmem.stdout                |   2 +-
 testsuite/tests/rts/testmblockalloc.c              |  75 ++++
 15 files changed, 840 insertions(+), 279 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc 0d1a8d09f452977aadef7897aa12a8d41c7a4af0