CODEWITHSUNDEEP
c#openclopencl.net
stenio
stenio

Reputation: 387

Correct way to dispose IMem objects created using OpenCL.net

I am having memory corruption problems when I explicitly dispose IMem objects created by OpenCL.Net (v2.2.9). If I don't call IMem.Dispose() the video card memory is not released.

Unfortunately I found too few examples on the subject. Here a single call to env.Dispose() is performed.

My code is something like this:

IMem<int> idxsBuffer = context.CreateBuffer(idxs, MemFlags.ReadOnly);

for(int i=0; i<n; i++){
   IMem<float4>[] a = CreateA(); // c_.Length times context.CreateBuffer(a_[...], MemFlags.ReadOnly)
   for(int j=0; j<m; j++){
      b_ = CreateB(i, j);
      c_ = CreateC(i, j);
      for(int k=0; k<o; j++){
         IMem<float4> b = context.CreateBuffer(b_[k], MemFlags.ReadOnly);
         IMem<float> c = context.CreateBuffer<float>(c_[k].Length, MemFlags.WriteOnly);
         kernel.Run(cmdQueue, idxsBuffer, b, a[k], c, [...]);
         float[] u = new float[c_[k].Length];
         cmdQueue.ReadFromBuffer(c, u);
         b.Dispose(); // Cause problem
         c.Dispose(); // Cause problem
      }
   }
   foreach(IMem<float4> a_ in a){
      a_.Dispose(); // Cause problem
   }
}

To avoid memory corruption I have to comment out the lines that cause problems, but then I see a constant increase of the video card memory consumption.

Edit: I partially solved the problem avoiding the disposal of the objects during the iterations, reusing the same buffers. Still I can't understand what I was doing wrong.

Upvotes: 0

Views: 128

Answers (0)

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