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
Lines: 23
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