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From: Jason Evans <jasone@FreeBSD.org>
Date: Wed, 27 Aug 2008 02:00:53 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/lib/libc/include libc_private.h src/lib/libc/stdlib
 Symbol.map malloc.3 malloc.c src/lib/libthr/thread thr_exit.c
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jasone      2008-08-27 02:00:53 UTC

  FreeBSD src repository

  Modified files:
    lib/libc/include     libc_private.h 
    lib/libc/stdlib      Symbol.map malloc.3 malloc.c 
    lib/libthr/thread    thr_exit.c 
  Log:
  SVN rev 182225 on 2008-08-27 02:00:53Z by jasone
  
  Add thread-specific caching for small size classes, based on magazines.
  This caching allows for completely lock-free allocation/deallocation in the
  steady state, at the expense of likely increased memory use and
  fragmentation.
  
  Reduce the default number of arenas to 2*ncpus, since thread-specific
  caching typically reduces arena contention.
  
  Modify size class spacing to include ranges of 2^n-spaced, quantum-spaced,
  cacheline-spaced, and subpage-spaced size classes.  The advantages are:
  fewer size classes, reduced false cacheline sharing, and reduced internal
  fragmentation for allocations that are slightly over 512, 1024, etc.
  
  Increase RUN_MAX_SMALL, in order to limit fragmentation for the
  subpage-spaced size classes.
  
  Add a size-->bin lookup table for small sizes to simplify translating sizes
  to size classes.  Include a hard-coded constant table that is used unless
  custom size class spacing is specified at run time.
  
  Add the ability to disable tiny size classes at compile time via
  MALLOC_TINY.
  
  Revision  Changes     Path
  1.20      +6 -0       src/lib/libc/include/libc_private.h
  1.9       +1 -0       src/lib/libc/stdlib/Symbol.map
  1.79      +52 -25     src/lib/libc/stdlib/malloc.3
  1.177     +1080 -231  src/lib/libc/stdlib/malloc.c
  1.30      +4 -0       src/lib/libthr/thread/thr_exit.c