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Subject: fixing heap_chunk_in_mb to 512MB doesn't work
From: Christophe Trophime <trophime AT grenoble DOT cnrs DOT fr>
To: cygwin AT cygwin DOT com
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Date: 04 Sep 2002 11:57:35 +0200
Message-Id: <1031133455.17672.11.camel@SNCI-PC3-15.grenoble.cnrs.fr>
Mime-Version: 1.0

As far as I have understood allocation is limited to 128 MB
in cygwin 1.3.12 but one can increased this limit by setting
heap_chunk_in_mb registry key.

I tried to fix this value to 512 Mb using :
regtool set '\user\Software\Cygnus Solutions\Cygwin\heap_chunk_in_mb'
512

But when I compile this little test program it fails (Aborted (cored
dumped)):

#include <iostream>
using namespace std;

int main(){
   
   char * tab_ptr = new char [256 * 1024 * 1024];
   if ( !tab_ptr ) {
       cerr << "Malloc failed\n";
       exit(1);
   }
   delete tab_ptr;
   return 0;
}

Thanks for your help


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