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-
- The Hoard Multiprocessor Memory Allocator
- <http://www.hoard.org>
-
- Version Information
- -------------------
-
- version 2.0.2:
-
- * Fixed a memory leak for SGI.
-
- version 2.0.1:
-
- * Fixed compilation on AIX with xlC (IBM).
-
- version 2.0:
-
- * Added very aggressive superblock recycling. Now an empty
- superblock is immediately available for reuse for another size
- class. This can dramatically reduce fragmentation.
-
- * We now preferentially allocate from recently-touched
- superblocks to improve page locality.
-
- * Incorporated a protocol to guarantee swift superblock
- 'acquisition' by free().
-
- version 1.5.3: (not generally released)
-
- * Miscellaneous bug fixes.
-
- version 1.5.2:
-
- * Fixed a problem on some Linux systems that caused
- many large allocations to fail.
- * Fixed a call to VirtualFree which didn't actually
- release memory back to the system.
-
-
- version 1.5.1:
-
- * Changed initialization of the process heap to fix
- a problem with Visual C++.
-
- version 1.5:
-
- * Large blocks (> 4K) are now immediately returned to
- the system when they are freed.
-
- * Made a number of improvements to the algorithm that ensure
- O(1) cost for malloc & free and guarantee low contention for
- free's. (These will be discussed in a paper currently in
- progress.) Also added a method that further reduces the number
- of system calls when allocating memory.
-
- * Added superblock recycling to reduce fragmentation.
-
- * Hoard now compiles with Sun's Workshop compilers (version 5.0)
- on SPARCs. (Thanks to Ganesan Rajagopal of Novell for the
- undocumented .il trick for inlining assembly.)
-
- * Ported to AIX (IBM, PowerPC-based).
-
- version 1.4.2:
-
- * A bug fix -- corrects a subtle problem with memalign.
- Hoard now successfully passes Wolfram Gloger's
- malloc-test (included with the distribution).
-
- version 1.4.1:
-
- * A few fixes for backward compatibility with Solaris 2.6.
-
- version 1.4:
-
- * Doubled the speed of calls to free().
- * Further improved scalability, especially on Solaris.
- * Reduced memory consumption and improved performance on
- uniprocessors.
- * Changed the lock implementation for Windows from spin to
- spin-yield, as in the UNIX implementations (thanks to Paul
- Larson of Microsoft Research for pointing out how to do this).
- * Removed the shbench benchmark from the distribution, per
- request from MicroQuill, Inc.
-
- version 1.3.3:
-
- * Changed some casts of pointers to unsigned longs
- to allow Hoard to work on 64-bit machines (read: SGI O2K).
-
- version 1.3.2:
-
- * Minor modifications for the Windows NT port,
- along with workspace and project files for Visual C++
- (thanks to Arnd Bohm).
-
- version 1.3.1:
-
- * Included a customized version of 'atexit' for Linux,
- since the newest version of libc (2.1.2) caused Hoard to
- deadlock (it called malloc internally).
-
- version 1.3:
-
- * Ported to the BeOS (thanks to Trey Boudreau of Be).
- * Replaced the per-sizeclass locks with per-heap locks,
- since this has no impact on scalability and reduces Hoard's
- static footprint.
-
- version 1.2:
-
- * Dramatically improved performance with fast user-level locks
- for SPARC, x86, and the SGI.
- * Added sproc support (for the SGI).
- * Hoard can now be built under Visual C++ (thanks to John
- Hickin).
-
- version 1.1:
-
- * Added autoconf and automake scripts to facilitate compilation
- and installation (including shared libraries).
- (thanks to Ganesan Rajagopal of Novell for submitting the scripts)
-
- version 1.0.3:
-
- * Hoard now scales on OS's besides Linux and Solaris.
- (the thread ID hash function was pathological for other OS's)
-
- version 1.0.2:
-
- * Ported to Windows NT.
- * Added in the benchmark suite (larson, linux-scalability, shbench).
-
- version 1.0.1:
-
- * Fixed a build problem.
-
- version 1.0:
-
- * Initial release.
-
-