GPU memory allocations protected with lock to prevent shared memory access issues. GPU usage limited for the best performance.

PerfectNumbers.Core/Gpu/MersenneNumberDivisorByDivisorGpuTester.cs

@@ -540,7 +540,7 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
 
 			if (_divisorBuffer == null)
 			{
-				// lock(accelerator)
+				lock(accelerator)
 				{
 					_divisorBuffer = accelerator.Allocate1D<GpuDivisorPartialData>(1);
 					_offsetBuffer = accelerator.Allocate1D<int>(1);
@@ -570,7 +570,7 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
 			{
 				int desiredCapacity = requiredCapacity > _capacity ? requiredCapacity : _capacity;
 				_capacity = desiredCapacity;
-				// lock (accelerator)
+				lock (accelerator)
 				{
 					_exponentsBuffer = accelerator.Allocate1D<ulong>(desiredCapacity);
 					_hitBuffer = accelerator.Allocate1D<byte>(desiredCapacity);
@@ -798,7 +798,7 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
 
 		private void AllocateDeviceBuffers(Accelerator accelerator, int capacity)
 		{
-			// lock (accelerator)
+			lock (accelerator)
 			{
 				_divisorDataBuffer = accelerator.Allocate1D<GpuDivisorPartialData>(capacity);
 				_offsetBuffer = accelerator.Allocate1D<int>(capacity);