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Full Discussion: Memory Leaks
Top Forums Programming Memory Leaks Post 302727745 by DreamWarrior on Tuesday 6th of November 2012 08:27:19 PM
Old 11-06-2012
Quote:
Originally Posted by jlliagre
In addition to what has already be answered, note that your C sample program uses no (significant) RAM. Allocating memory essentially means reserving virtual memory space which is a very lightweight operation and is unrelated to your RAM size.
Beaten...lol. That's what I was going to post. Malloc 1gb of memory does "nothing" until you touch the pages. Replace that statement with, for example, calloc, though, and...well...just go ahead and do it, if you only have 1gb of RAM, get some coffee first, lol.

P.S. "nothing" is a grave over-simplification, but...while it does create page mappings for the process and reserves address space, it doesn't actually back any of the pages until they are touched.
 

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CHI::Driver::RawMemory(3pm)				User Contributed Perl Documentation			       CHI::Driver::RawMemory(3pm)

NAME
CHI::Driver::RawMemory - In-process memory cache that stores direct references VERSION
version 0.54 SYNOPSIS
use CHI; my $hash = {}; my $cache = CHI->new( driver => 'RawMemory', datastore => $hash ); my $cache = CHI->new( driver => 'RawMemory', global => 1 ); DESCRIPTION
This is a subclass of CHI::Driver::Memory that stores references to data structures directly instead of serializing / deserializing. This makes the cache faster at getting and setting complex data structures, but unlike most drivers, modifications to the original data structure will affect the data structure stored in the cache, and vica versa. e.g. my $cache = CHI->new( driver => 'Memory', global => 1 ); my $lst = ['foo']; $cache->set('key' => $lst); # serializes $lst before storing $cache->get('key'); # returns ['foo'] $lst->[0] = 'bar'; $cache->get('key'); # returns ['foo'] my $cache = CHI->new( driver => 'RawMemory', global => 1 ); my $lst = ['foo']; $cache->set('key' => $lst); # stores $lst directly $cache->get('key'); # returns ['foo'] $lst->[0] = 'bar'; $cache->get('key'); # returns ['bar']! CONSTRUCTOR OPTIONS
Same as CHI::Driver::Memory. SIZE AWARENESS
For the purpose of size-awareness, all items count as size 1 for this driver. (Because data structures are not serialized, there's no good way to determine their size.) # Keep a maximum of 10 items in cache # my $cache = CHI->new( driver => 'RawMemory', datastore => {}, max_size => 10 ); ACKNOWLEDGEMENTS
Thanks to Yuval Kogman whose Cache::Ref inspired me to do this. SEE ALSO
CHI::Driver::Memory, CHI AUTHOR
Jonathan Swartz <swartz@pobox.com> COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Jonathan Swartz. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-05-30 CHI::Driver::RawMemory(3pm)
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