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diff --git a/README.txt b/README.txt new file mode 100644 index 0000000..2e8d86b --- /dev/null +++ b/README.txt @@ -0,0 +1,74 @@ += Mall - access the mallinfo(3) and mallopt(3) functions + +* http://bogomips.org/mall + +== DESCRIPTION: + +This library provides access to the mallinfo(3) and mallopt(3) +functions. mallinfo(3) is used for reporting malloc statistics and +mallopt(3) can be used to tune malloc(3) implementations. See the +corresponding documentation for the C library functions before +proceeding. + +These functions are implementation-specific, so tuning options that +work for one implementation of malloc may not work at all for another +implementation. + +Constants defined in the the malloc.h header with a "M_" prefix are +defined without the prefix in the Mall namespace (e.g. "M_TRIM_THRESHOLD +=> Mall::TRIM_THRESHOLD). + + +== FEATURES/PROBLEMS: + +* This has only been tested with glibc (ptmalloc2) malloc, although + it is likely to work with ptmalloc3. Reports of success/failure + on other systems are greatly appreciated. + +* Mall.info does not work reliably when your application using more + than 2G of memory (this is probably a bad idea anyways). + +* Neither Mall.info nor Mall.opt are supported by all malloc + implementations, nor are all constants always defined or useful + if they're defined. + +* Constants and functionality are defined at build time, so changing + your malloc implementation may require rebuilding and reinstalling + this library. + +== SYNOPSIS: + + # Assuming a glibc/ptmalloc system: + + require 'mall' + + Mall.opt(Mall::TRIM_THRESHOLD, 1024*1024) + Mall.opt(Mall::TOP_PAD, 1024*1024) + Mall.opt(Mall::MXFAST, 80) + + hash = Mall.info + +== REQUIREMENTS: + +* A malloc implementation supporting mallinfo(3) and/or mallopt(3). + +== INSTALL: + +* gem install mall + +== LICENSE: + +Copyright (C) 2009 Eric Wong <normalperson@yhbt.net> + +Mall is free software; you can redistribute it and/or modify it under +the terms of the GNU Lesser General Public License as published by the +Free Software Foundation, version 3.0 + +Mall is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public +License for more details. + +You should have received a copy of the GNU Lesser General Public License +along with the GNU C Library; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |