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* sp/msysgit: compat/ has subdirectories: do not omit them in 'make clean' Fix typo in nedmalloc warning fix MinGW: Teach Makefile to detect msysgit and apply specific settings Fix warnings in nedmalloc when compiling with GCC 4.4.0 Add custom memory allocator to MinGW and MacOS builds MinGW readdir reimplementation to support d_type connect.c: Support PuTTY plink and TortoisePlink as SSH on Windows git: browsing paths with spaces when using the start command MinGW: fix warning about implicit declaration of _getch() test-chmtime: work around Windows limitation Work around a regression in Windows 7, causing erase_in_line() to crash sometimes Quiet make: do not leave Windows behind MinGW: GCC >= 4 does not need SNPRINTF_SIZE_CORR anymore Conflicts: Makefile
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| Boost Software License - Version 1.0 - August 17th, 2003 | ||
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| Permission is hereby granted, free of charge, to any person or organization | ||
| obtaining a copy of the software and accompanying documentation covered by | ||
| this license (the "Software") to use, reproduce, display, distribute, | ||
| execute, and transmit the Software, and to prepare derivative works of the | ||
| Software, and to permit third-parties to whom the Software is furnished to | ||
| do so, all subject to the following: | ||
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| The copyright notices in the Software and this entire statement, including | ||
| the above license grant, this restriction and the following disclaimer, | ||
| must be included in all copies of the Software, in whole or in part, and | ||
| all derivative works of the Software, unless such copies or derivative | ||
| works are solely in the form of machine-executable object code generated by | ||
| a source language processor. | ||
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| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT | ||
| SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE | ||
| FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, | ||
| ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| DEALINGS IN THE SOFTWARE. |
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| nedalloc v1.05 15th June 2008: | ||
| -=-=-=-=-=-=-=-=-=-=-=-=-=-=-= | ||
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| by Niall Douglas (http://www.nedprod.com/programs/portable/nedmalloc/) | ||
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| Enclosed is nedalloc, an alternative malloc implementation for multiple | ||
| threads without lock contention based on dlmalloc v2.8.4. It is more | ||
| or less a newer implementation of ptmalloc2, the standard allocator in | ||
| Linux (which is based on dlmalloc v2.7.0) but also contains a per-thread | ||
| cache for maximum CPU scalability. | ||
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| It is licensed under the Boost Software License which basically means | ||
| you can do anything you like with it. This does not apply to the malloc.c.h | ||
| file which remains copyright to others. | ||
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| It has been tested on win32 (x86), win64 (x64), Linux (x64), FreeBSD (x64) | ||
| and Apple MacOS X (x86). It works very well on all of these and is very | ||
| significantly faster than the system allocator on all of these platforms. | ||
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| By literally dropping in this allocator as a replacement for your system | ||
| allocator, you can see real world improvements of up to three times in normal | ||
| code! | ||
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| To use: | ||
| -=-=-=- | ||
| Drop in nedmalloc.h, nedmalloc.c and malloc.c.h into your project. | ||
| Configure using the instructions in nedmalloc.h. Run and enjoy. | ||
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| To test, compile test.c. It will run a comparison between your system | ||
| allocator and nedalloc and tell you how much faster nedalloc is. It also | ||
| serves as an example of usage. | ||
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| Notes: | ||
| -=-=-= | ||
| If you want the very latest version of this allocator, get it from the | ||
| TnFOX SVN repository at svn://svn.berlios.de/viewcvs/tnfox/trunk/src/nedmalloc | ||
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| Because of how nedalloc allocates an mspace per thread, it can cause | ||
| severe bloating of memory usage under certain allocation patterns. | ||
| You can substantially reduce this wastage by setting MAXTHREADSINPOOL | ||
| or the threads parameter to nedcreatepool() to a fraction of the number of | ||
| threads which would normally be in a pool at once. This will reduce | ||
| bloating at the cost of an increase in lock contention. If allocated size | ||
| is less than THREADCACHEMAX, locking is avoided 90-99% of the time and | ||
| if most of your allocations are below this value, you can safely set | ||
| MAXTHREADSINPOOL to one. | ||
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| You will suffer memory leakage unless you call neddisablethreadcache() | ||
| per pool for every thread which exits. This is because nedalloc cannot | ||
| portably know when a thread exits and thus when its thread cache can | ||
| be returned for use by other code. Don't forget pool zero, the system pool. | ||
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| For C++ type allocation patterns (where the same sizes of memory are | ||
| regularly allocated and deallocated as objects are created and destroyed), | ||
| the threadcache always benefits performance. If however your allocation | ||
| patterns are different, searching the threadcache may significantly slow | ||
| down your code - as a rule of thumb, if cache utilisation is below 80% | ||
| (see the source for neddisablethreadcache() for how to enable debug | ||
| printing in release mode) then you should disable the thread cache for | ||
| that thread. You can compile out the threadcache code by setting | ||
| THREADCACHEMAX to zero. | ||
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| Speed comparisons: | ||
| -=-=-=-=-=-=-=-=-= | ||
| See Benchmarks.xls for details. | ||
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| The enclosed test.c can do two things: it can be a torture test or a speed | ||
| test. The speed test is designed to be a representative synthetic | ||
| memory allocator test. It works by randomly mixing allocations with frees | ||
| with half of the allocation sizes being a two power multiple less than | ||
| 512 bytes (to mimic C++ stack instantiated objects) and the other half | ||
| being a simple random value less than 16Kb. | ||
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| The real world code results are from Tn's TestIO benchmark. This is a | ||
| heavily multithreaded and memory intensive benchmark with a lot of branching | ||
| and other stuff modern processors don't like so much. As you'll note, the | ||
| test doesn't show the benefits of the threadcache mostly due to the saturation | ||
| of the memory bus being the limiting factor. | ||
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| ChangeLog: | ||
| -=-=-=-=-= | ||
| v1.05 15th June 2008: | ||
| * { 1042 } Added error check for TLSSET() and TLSFREE() macros. Thanks to | ||
| Markus Elfring for reporting this. | ||
| * { 1043 } Fixed a segfault when freeing memory allocated using | ||
| nedindependent_comalloc(). Thanks to Pavel Vozenilek for reporting this. | ||
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| v1.04 14th July 2007: | ||
| * Fixed a bug with the new optimised implementation that failed to lock | ||
| on a realloc under certain conditions. | ||
| * Fixed lack of thread synchronisation in InitPool() causing pool corruption | ||
| * Fixed a memory leak of thread cache contents on disabling. Thanks to Earl | ||
| Chew for reporting this. | ||
| * Added a sanity check for freed blocks being valid. | ||
| * Reworked test.c into being a torture test. | ||
| * Fixed GCC assembler optimisation misspecification | ||
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| v1.04alpha_svn915 7th October 2006: | ||
| * Fixed failure to unlock thread cache list if allocating a new list failed. | ||
| Thanks to Dmitry Chichkov for reporting this. Futher thanks to Aleksey Sanin. | ||
| * Fixed realloc(0, <size>) segfaulting. Thanks to Dmitry Chichkov for | ||
| reporting this. | ||
| * Made config defines #ifndef so they can be overriden by the build system. | ||
| Thanks to Aleksey Sanin for suggesting this. | ||
| * Fixed deadlock in nedprealloc() due to unnecessary locking of preferred | ||
| thread mspace when mspace_realloc() always uses the original block's mspace | ||
| anyway. Thanks to Aleksey Sanin for reporting this. | ||
| * Made some speed improvements by hacking mspace_malloc() to no longer lock | ||
| its mspace, thus allowing the recursive mutex implementation to be removed | ||
| with an associated speed increase. Thanks to Aleksey Sanin for suggesting this. | ||
| * Fixed a bug where allocating mspaces overran its max limit. Thanks to | ||
| Aleksey Sanin for reporting this. | ||
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| v1.03 10th July 2006: | ||
| * Fixed memory corruption bug in threadcache code which only appeared with >4 | ||
| threads and in heavy use of the threadcache. | ||
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| v1.02 15th May 2006: | ||
| * Integrated dlmalloc v2.8.4, fixing the win32 memory release problem and | ||
| improving performance still further. Speed is now up to twice the speed of v1.01 | ||
| (average is 67% faster). | ||
| * Fixed win32 critical section implementation. Thanks to Pavel Kuznetsov | ||
| for reporting this. | ||
| * Wasn't locking mspace if all mspaces were locked. Thanks to Pavel Kuznetsov | ||
| for reporting this. | ||
| * Added Apple Mac OS X support. | ||
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| v1.01 24th February 2006: | ||
| * Fixed multiprocessor scaling problems by removing sources of cache sloshing | ||
| * Earl Chew <earl_chew <at> agilent <dot> com> sent patches for the following: | ||
| 1. size2binidx() wasn't working for default code path (non x86) | ||
| 2. Fixed failure to release mspace lock under certain circumstances which | ||
| caused a deadlock | ||
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| v1.00 1st January 2006: | ||
| * First release |
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