Why mono GC does not realloc the heap after collect?

[Alex A Ermoshenko]

//Example code
//On the NetFarmewort - all work fine
//On Mono  - ~105MiB in the heap, after GC.Collect(). Expected ~5 MiB
////////////////
using System;
using System.Collections.Generic;
using System.Text;

namespace mono_gc_test
{
        class Program
        {
                static object alloc100MB()
                {
                        byte[] data = new byte[100 * 1024 * 1024];
                        return data;
                }
                static void msg(string text, bool wait)
                {
                        Console.WriteLine(text);
                        if (wait)
                                Console.ReadLine();
                }
                static void Main(string[] args)
                {
                        object data = null;
                        msg("Mono GC.Collect() realloc test.", false);
                        msg("Press ENTER to alloc 100MiB of data", true);
                        data = alloc100MB();
                        msg("Press ENTER to GC.Collect()", true);
                        data = null;
                        GC.Collect();
                        msg("Press ENTER to exit", true);
                }
        }
}

[Petit Eric]

rarrrr, forget the monolist, sorry

2009/11/3 Petit Eric <surfzoid@...>

same if trying to force :
//Example code
//On the NetFarmework - all work fine

//On Mono  - ~105MiB in the heap, after GC.Collect(). Expected ~5 MiB
////////////////
using System;
using System.Collections.Generic;
using System.Text;

namespace mono_gc_test
{
       class Program
       {
               static object alloc100MB()
               {
                       byte[] data = new byte[100 * 1024 * 1024];
                       return data;
               }
               static void msg(string text, bool wait)
               {
                       Console.WriteLine(text);
                       if (wait)
                               Console.ReadLine();
               }
               static void Main(string[] args)
               {
                       object data = null;
                       msg("Mono GC.Collect() realloc test.", false);

                       msg(GC.GetTotalMemory(true).ToString(),false);

                       msg("Press ENTER to alloc 100MiB of data", true);
                       data = alloc100MB();

                       msg(GC.GetTotalMemory(true).ToString(),false);

                       msg("Press ENTER to GC.Collect()", true);
                       data = null;
                       GC.Collect();

                       msg(GC.GetTotalMemory(true).ToString(),false);                      
                       GC.Collect(100 * 1024 * 1024,GCCollectionMode.Forced);
                       msg(GC.GetTotalMemory(true).ToString(),false);
                       msg("Press ENTER to exit", true);
               }
       }
}

2009/11/3 Alex A Ermoshenko <erax@...>

//Example code
//On the NetFarmewort - all work fine
//On Mono  - ~105MiB in the heap, after GC.Collect(). Expected ~5 MiB
////////////////
using System;
using System.Collections.Generic;
using System.Text;

namespace mono_gc_test
{
       class Program
       {
               static object alloc100MB()
               {
                       byte[] data = new byte[100 * 1024 * 1024];
                       return data;
               }
               static void msg(string text, bool wait)
               {
                       Console.WriteLine(text);
                       if (wait)
                               Console.ReadLine();
               }
               static void Main(string[] args)
               {
                       object data = null;
                       msg("Mono GC.Collect() realloc test.", false);
                       msg("Press ENTER to alloc 100MiB of data", true);
                       data = alloc100MB();
                       msg("Press ENTER to GC.Collect()", true);
                       data = null;
                       GC.Collect();
                       msg("Press ENTER to exit", true);
               }
       }
}
--

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--
Cordially.

Small Eric Quotations of the days:
---------------------------------------------------------------------------
I have no special talents. I am only passionately curious

--
Cordially.

Small Eric Quotations of the days:
---------------------------------------------------------------------------
I have no special talents. I am only passionately curious
Sent from Bordeaux, France
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