Xref:	news2.mv.net comp.os.msdos.djgpp:4407
From:	myskin AT inp DOT nsk DOT su (Vyacheslav O. Myskin)
Newsgroups:	comp.os.msdos.djgpp
Subject:	How much free memory?
Date:	Thu, 30 May 1996 06:25:28 GMT
Organization:	BINP RAS
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Message-ID:	<4ojf0s$o2q@sky.inp.nsk.su>
References:	<4ofa1t$ifo AT usenet DOT rpi DOT edu>
Reply-To:	myskin AT inp DOT nsk DOT su
NNTP-Posting-Host:	csd-bsdi.inp.nsk.su
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

calvid AT matisse DOT its DOT rpi DOT edu (David J. Calvin) wrote:

>How exactly do I find how much free physical memory is available to my
>program?  I'm sure there is a function somewhere to do it, but I don't
>know what it is.  Thanks in advance.

I'd like to know the answer too. I've browsed the list of
memory-related functions and found nothing to get the amount of memory
available. And here are some results of my experiments with malloc:

					        swap on      off                           
Largest allocatable block returned by DPMI:         26Mb	3Mb
Largest block malloc can allocate:	           16Mb	2Mb

Malloc seems to grab about 30% of memory for its needs! Is there any
way to tune it? If I want to allocate all my free memory as one big
block, perhaps I don't need several Mb to store information about it.

Best wishes,
V. Myskin

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