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From:	Krzysztof Duleba <krzysan AT skrzynka DOT pl>
Subject:	Re: malloc/new allocate twice as much?
Date:	Sat, 31 Dec 2005 02:23:20 +0100
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Dan Stratila wrote:

> This is an issue I've discovered and reproduced while trying to compile
> polymake (see the thread "gcc crash (memory?)"). It seems that both malloc
> and new allocate take up twice the amount of memory needed.
> 
> I wrote a short program to allocate and use memory in chunks (mem-test.cpp),
> and compiled it with g++ 3.4.4. I monitored it using the Windows Task
> Manager. When asked to allocate 100MB in increments of 10MB, the process
> size goes to 100MB and then drops to 0, as expected. However, the total
> commit charge for the machine goes up by 200MB, and then drops back!

Try the snapshot. On my laptop with XP SP2, 20051222 snapshot, 1GB RAM and 
1GB swap file I had no problem allocating 1.8 GB.

Krzysztof Duleba



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