[ace-users] Ace and Memory [NC]

[Johnny Willemsen]

Hi,

Please check the allocator documentation, the first argument of the
constructor is the number of chunks, the second the size of the chunk. At
the moment the allocated has allocated the number if chunks the memory is
used and you can't allocate anymore chunks.

Regards,

Johnny Willemsen
Remedy IT
Postbus 101
2650 AC  Berkel en Rodenrijs
The Netherlands
www.theaceorb.nl / www.remedy.nl  

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> ACE version 5.6,
> 
> OS Windows XP Professional.
> 
> Compiler:   Borland C++ Builder version 6
> 
> 
> Hi,
> 
> I'm using the ACE allocators in the hope of improving 
> performance. The goal
> is to reduce the time we spend doing heap allocations. We 
> have no issues
> with the size of our process or how much memory it consumes (broadly
> speaking) but we definitely need to enhance performance via 
> allocators.
> We've already deploy boost allocators/memory pooling in other 
> parts of the
> application (the visual studio side), but we cannot use boost for our
> borland c++ builder dlls/side (the app contains both dlls 
> side by side) as
> boost doesn't support c++ builder 6
> 
> 
> In any case, I'm trying to use the ACE allocators to do some memory
> pooling.
> 
> To this effect I started researching and testing the
> ACE_Dynamic_Cached_Allocator which works fine.. except for one aspect.
> 
> The allocator uses;
> 
> ACE_Locked_Free_List<ACE_Cached_Mem_Pool_Node<char>, 
> ACE_LOCK> free_list_;
> 
> 
> 
> when I create an instance of the allocator defined thus;
> 
> typedef ACE_Dynamic_Cached_Allocator<ACE_SYNCH_MUTEX> Allocator;
> 
> 
> static Allocator allocator_(sizeof(Toto2), 100 );  // toto is my class
> which needs to be sped up
> 
> it seems that after 100 chunks have been allocated, it does 
> not allocate
> any more. I need more memory to be allocated so subsequent 
> calls to malloc
> from my version of new will be satisfied after 100 chunks are 
> returned.
> 
> 
> void* Toto2::operator new (size_t size)
> {
>       return allocator_.malloc(size);
> };
> 
> Looking at my test program, i can verify that after 100 
> allocations (calls
> to _malloc on the allocator), no more memory is allocated/added to the
> pool.
> 
> Could anybody help me out? I have this stuff working with 
> boost but as I
> say, I can't use boost for my borland c++ builder 6 dll (they 
> don't support
> cbuilder 6)
> 
> 
> 
> thanks much and have a nice day
> 
> G
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