Examples with CudaMemory com.simiacryptus.mindseye.lang.cudnn.CudaMemory used on opensource projects

Example 6 with CudaMemory

use of com.simiacryptus.mindseye.lang.cudnn.CudaMemory in project MindsEye by SimiaCryptus.

the class ImgTileAssemblyLayer method copy.

/**
 * Copy cuda tensor.
 *
 * @param gpu            the gpu
 * @param error          the error
 * @param tileDimensions the tile dimensions
 * @param outputDims     the output dims
 * @param length         the length
 * @param positionX      the position x
 * @param positionY      the position y
 * @return the cuda tensor
 */
public CudaTensor copy(final CudnnHandle gpu, final TensorList error, final int[] tileDimensions, final int[] outputDims, final int length, final int positionX, final int positionY) {
    @Nullable final CudaTensor errorPtr = gpu.getTensor(error, precision, MemoryType.Device, false);
    @Nonnull final CudaMemory passbackBuffer = gpu.allocate((long) length * tileDimensions[2] * tileDimensions[1] * tileDimensions[0] * precision.size, MemoryType.Managed.normalize(), false);
    copy(gpu, length, outputDims, errorPtr, tileDimensions, passbackBuffer, positionX, positionY);
    errorPtr.freeRef();
    CudaDevice.CudaTensorDescriptor descriptor = gpu.newTensorDescriptor(precision, length, tileDimensions[2], tileDimensions[1], tileDimensions[0]);
    return CudaTensor.wrap(passbackBuffer, descriptor, precision);
}

Example 7 with CudaMemory

use of com.simiacryptus.mindseye.lang.cudnn.CudaMemory in project MindsEye by SimiaCryptus.

the class ActivationLayer method evalAndFree.

@Nullable
@Override
public Result evalAndFree(@Nonnull final Result... inObj) {
    if (!CudaSystem.isEnabled())
        return getCompatibilityLayer().evalAndFree(inObj);
    // assert Arrays.stream(inObj).flatMapToDouble(input->input.data.stream().flatMapToDouble(x-> Arrays.stream(x.getData()))).allMatch(v->Double.isFinite(v));
    final Result inputResult = inObj[0];
    final TensorList inputData = inputResult.getData();
    @Nonnull final int[] inputSize = inputData.getDimensions();
    @Nonnull final int[] outputSize = inputSize;
    final int length = inputData.length();
    final int inputDims = Tensor.length(inputSize);
    try {
        final CudaTensor outPtr = CudaSystem.run(gpu -> {
            @Nullable final CudaTensor inputTensor = gpu.getTensor(inputData, precision, MemoryType.Device, false);
            final CudaTensor outputTensor;
            if (1 == inputData.currentRefCount() && 1 == inputTensor.currentRefCount() && (!inputResult.isAlive() || mode == Mode.RELU.id)) {
                inputTensor.addRef();
                outputTensor = inputTensor;
            } else {
                @Nonnull final CudaDevice.CudaTensorDescriptor outputDescriptor = gpu.newTensorDescriptor(precision, length, inputSize[2], inputSize[1], inputSize[0], inputSize[2] * inputSize[1] * inputSize[0], inputSize[1] * inputSize[0], inputSize[0], 1);
                @Nonnull final CudaMemory outputData = gpu.allocate((long) precision.size * inputDims * length, MemoryType.Managed.normalize(), true);
                outputTensor = CudaTensor.wrap(outputData, outputDescriptor, precision);
            }
            @Nonnull final CudaResource<cudnnActivationDescriptor> activationDesc = gpu.newActivationDescriptor(mode, cudnnNanPropagation.CUDNN_NOT_PROPAGATE_NAN, 0);
            try {
                CudaMemory memory = inputTensor.getMemory(gpu);
                CudaMemory tensorMemory = outputTensor.getMemory(gpu);
                CudaSystem.handle(gpu.cudnnActivationForward(activationDesc.getPtr(), precision.getPointer(1.0), inputTensor.descriptor.getPtr(), memory.getPtr(), precision.getPointer(0.0), outputTensor.descriptor.getPtr(), tensorMemory.getPtr()));
                assert CudaDevice.isThreadDeviceId(gpu.getDeviceId());
                memory.dirty();
                tensorMemory.dirty();
                tensorMemory.freeRef();
                memory.freeRef();
                return outputTensor;
            } catch (@Nonnull final Throwable e) {
                throw new ComponentException("Error apply " + Arrays.toString(inputSize), e);
            } finally {
                activationDesc.freeRef();
                inputTensor.freeRef();
            }
        }, inputData);
        return new Result(CudaTensorList.create(outPtr, length, outputSize, precision), (@Nonnull final DeltaSet<Layer> buffer, @Nonnull final TensorList delta) -> {
            if (inputResult.isAlive()) {
                final TensorList data = CudaSystem.run(gpu -> {
                    @Nullable CudaTensor inputTensor = gpu.getTensor(inputData, precision, MemoryType.Device, true);
                    @Nullable CudaTensor deltaTensor = gpu.getTensor(delta, precision, MemoryType.Device, true);
                    assert length == delta.length();
                    CudaTensor localOut = outPtr.getDense(gpu);
                    delta.freeRef();
                    CudaTensor passbackTensor;
                    // if (sameStrides(deltaTensor.descriptor, inputTensor.descriptor)) {
                    // passbackTensor = deltaTensor;
                    // passbackTensor.addRef();
                    // }
                    // else {
                    // passbackTensor = deltaTensor.getDense(gpu);
                    // inputTensor = inputTensor.getDenseAndFree(gpu);
                    // }
                    passbackTensor = CudaTensor.wrap(gpu.allocate((long) Tensor.length(inputSize) * length * precision.size, MemoryType.Managed.normalize(), false), gpu.newTensorDescriptor(precision, length, inputSize[2], inputSize[1], inputSize[0], inputSize[2] * inputSize[1] * inputSize[0], inputSize[1] * inputSize[0], inputSize[0], 1), precision);
                    @Nonnull final CudaResource<cudnnActivationDescriptor> activationDesc = gpu.newActivationDescriptor(mode, cudnnNanPropagation.CUDNN_NOT_PROPAGATE_NAN, 0);
                    try {
                        CudaMemory localOutMemory = localOut.getMemory(gpu);
                        CudaMemory deltaTensorMemory = deltaTensor.getMemory(gpu);
                        CudaMemory inputTensorMemory = inputTensor.getMemory(gpu);
                        CudaMemory passbackTensorMemory = passbackTensor.getMemory(gpu);
                        CudaSystem.handle(gpu.cudnnActivationBackward(activationDesc.getPtr(), precision.getPointer(1.0), localOut.descriptor.getPtr(), localOutMemory.getPtr(), deltaTensor.descriptor.getPtr(), deltaTensorMemory.getPtr(), inputTensor.descriptor.getPtr(), inputTensorMemory.getPtr(), precision.getPointer(0.0), passbackTensor.descriptor.getPtr(), passbackTensorMemory.getPtr()));
                        assert CudaDevice.isThreadDeviceId(gpu.getDeviceId());
                        localOutMemory.dirty();
                        deltaTensorMemory.dirty();
                        inputTensorMemory.dirty();
                        passbackTensorMemory.dirty();
                        localOutMemory.freeRef();
                        deltaTensorMemory.freeRef();
                        inputTensorMemory.freeRef();
                        passbackTensorMemory.freeRef();
                    } catch (@Nonnull final Throwable e) {
                        throw new ComponentException("Error apply " + Arrays.toString(inputSize), e);
                    } finally {
                        localOut.freeRef();
                        inputTensor.freeRef();
                        deltaTensor.freeRef();
                        activationDesc.freeRef();
                    }
                    return CudaTensorList.wrap(passbackTensor, length, inputSize, precision);
                }, delta);
                inputResult.accumulate(buffer, data);
            } else {
                delta.freeRef();
            }
        }) {

            @Override
            public final void accumulate(DeltaSet<Layer> buffer, TensorList delta) {
                getAccumulator().accept(buffer, delta);
            }

            @Override
            protected void _free() {
                inputData.freeRef();
                outPtr.freeRef();
                inputResult.freeRef();
            }

            @Override
            public boolean isAlive() {
                return inputResult.isAlive() || !isFrozen();
            }
        };
    } catch (@Nonnull final Throwable e) {
        throw new ComponentException("Error apply image res " + Arrays.toString(inputSize), e);
    }
}

Example 8 with CudaMemory

use of com.simiacryptus.mindseye.lang.cudnn.CudaMemory in project MindsEye by SimiaCryptus.

the class BandAvgReducerLayer method evalAndFree.

@Nullable
@Override
public Result evalAndFree(final Result... inObj) {
    if (!CudaSystem.isEnabled())
        return getCompatibilityLayer().evalAndFree(inObj);
    final Result input = inObj[0];
    TensorList inputData = input.getData();
    @Nonnull final int[] inputSize = inputData.getDimensions();
    int length = inputData.length();
    final int bands = inputSize[2];
    CudaTensorList result = CudaSystem.run(gpu -> {
        CudaTensor inputTensor = gpu.getTensor(inputData, precision, MemoryType.Device, false);
        @Nonnull final CudaDevice.CudaTensorDescriptor outputDescriptor = gpu.newTensorDescriptor(precision, length, bands, 1, 1);
        long size = (long) precision.size * outputDescriptor.nStride * length;
        @Nonnull final CudaMemory outputPtr = gpu.allocate(size, MemoryType.Managed, true);
        CudaResource<cudnnReduceTensorDescriptor> reduceTensorDescriptor = gpu.cudnnCreateReduceTensorDescriptor(cudnnReduceTensorOp.CUDNN_REDUCE_TENSOR_AVG, precision.code, cudnnNanPropagation.CUDNN_NOT_PROPAGATE_NAN, cudnnReduceTensorIndices.CUDNN_REDUCE_TENSOR_NO_INDICES, cudnnIndicesType.CUDNN_32BIT_INDICES);
        CudaMemory inputMemory = inputTensor.getMemory(gpu);
        @Nonnull final CudaMemory workspacePtr = gpu.allocate(inputMemory.size, MemoryType.Device, true);
        @Nonnull final CudaMemory indexPtr = gpu.allocate(12 * length, MemoryType.Device, false);
        gpu.cudnnReduceTensor(reduceTensorDescriptor.getPtr(), indexPtr.getPtr(), indexPtr.size, workspacePtr.getPtr(), workspacePtr.size, precision.getPointer(alpha), inputTensor.descriptor.getPtr(), inputMemory.getPtr(), precision.getPointer(0.0), outputDescriptor.getPtr(), outputPtr.getPtr());
        outputPtr.dirty();
        inputMemory.dirty();
        Stream.of(inputMemory, inputTensor, reduceTensorDescriptor, workspacePtr, indexPtr, inputData).forEach(ReferenceCounting::freeRef);
        return CudaTensorList.wrap(CudaTensor.wrap(outputPtr, outputDescriptor, precision), length, new int[] { 1, 1, bands }, precision);
    });
    int pixels = inputSize[0] * inputSize[1];
    return new Result(result, (DeltaSet<Layer> ctx, TensorList delta) -> {
        TensorList passback;
        passback = TensorArray.wrap(delta.stream().map(x -> {
            Tensor tensor = new Tensor(inputSize[0], inputSize[1], inputSize[2]).setByCoord(c -> x.get(c.getCoords()[2]) * alpha / pixels);
            x.freeRef();
            return tensor;
        }).toArray(i -> new Tensor[i]));
        // passback = CudaSystem.run(gpu -> {
        // CudaTensor deltaTensor = gpu.getTensor(delta, precision, MemoryType.Device, true);
        // @Nonnull final CudaDevice.CudaTensorDescriptor outputDescriptor = gpu.newTensorDescriptor(precision,
        // length, inputSize[2], inputSize[1], inputSize[0]);
        // @Nonnull final CudaMemory outputPtr = gpu.allocate((long) precision.size * outputDescriptor.nStride * length, MemoryType.Device, true);
        // CudaMemory deltaMemory = deltaTensor.getMemory(gpu);
        // @Nonnull final CudaDevice.CudaTensorDescriptor inputDescriptor = gpu.newTensorDescriptor(precision,
        // 1, 1, inputSize[1], inputSize[0]);
        // for(int batch=0;batch<length;batch++){
        // Tensor tensor = delta.get(batch);
        // for(int band=0;band<bands;band++){
        // int i = batch * bands + band;
        // CudaMemory img = outputPtr.withByteOffset(precision.size * i * outputDescriptor.cStride);
        // CudaMemory val = deltaMemory.withByteOffset(precision.size * i);
        // gpu.cudnnSetTensor(inputDescriptor.getPtr(), img.getPtr(), precision.getPointer(tensor.get(band) / outputDescriptor.cStride));
        // img.freeRef();
        // val.freeRef();
        // outputPtr.dirty().synchronize();
        // }
        // }
        // Stream.of(deltaMemory, deltaTensor, inputDescriptor).forEach(ReferenceCounting::freeRef);
        // return CudaTensorList.wrap(CudaTensor.wrap(outputPtr, outputDescriptor, precision), length, inputSize, precision);
        // });
        input.accumulate(ctx, passback);
    }) {

        @Override
        protected void _free() {
            super._free();
            input.freeRef();
        }
    };
}

Example 9 with CudaMemory

use of com.simiacryptus.mindseye.lang.cudnn.CudaMemory in project MindsEye by SimiaCryptus.

the class BinarySumLayer method evalAndFree.

@Nullable
@Override
public Result evalAndFree(@Nonnull final Result... inObj) {
    if (inObj.length == 1) {
        if (rightFactor != 1)
            throw new IllegalStateException();
        if (leftFactor != 1)
            throw new IllegalStateException();
        return inObj[0];
    }
    if (inObj.length > 2) {
        if (rightFactor != 1)
            throw new IllegalStateException();
        if (leftFactor != 1)
            throw new IllegalStateException();
        return Arrays.stream(inObj).reduce((a, b) -> evalAndFree(a, b)).get();
    }
    assert (inObj.length == 2);
    final TensorList leftData = inObj[0].getData();
    final TensorList rightData = inObj[1].getData();
    int[] leftDimensions = leftData.getDimensions();
    if (3 < leftDimensions.length) {
        throw new IllegalArgumentException("dimensions=" + Arrays.toString(leftDimensions));
    }
    @Nonnull final int[] dimensions = { leftDimensions.length < 1 ? 0 : leftDimensions[0], leftDimensions.length < 2 ? 1 : leftDimensions[1], leftDimensions.length < 3 ? 1 : leftDimensions[2] };
    final int length = leftData.length();
    if (length != rightData.length())
        throw new IllegalArgumentException();
    if (3 != dimensions.length) {
        throw new IllegalArgumentException("dimensions=" + Arrays.toString(dimensions));
    }
    for (int i = 1; i < inObj.length; i++) {
        if (Tensor.length(dimensions) != Tensor.length(inObj[i].getData().getDimensions())) {
            throw new IllegalArgumentException(Arrays.toString(dimensions) + " != " + Arrays.toString(inObj[i].getData().getDimensions()));
        }
    }
    if (!CudaSystem.isEnabled())
        return getCompatibilityLayer().evalAndFree(inObj);
    return new Result(CudaSystem.run(gpu -> {
        @Nonnull final CudaResource<cudnnOpTensorDescriptor> opDescriptor = gpu.newOpDescriptor(cudnnOpTensorOp.CUDNN_OP_TENSOR_ADD, precision);
        @Nonnull final CudaDevice.CudaTensorDescriptor outputDescriptor = gpu.newTensorDescriptor(precision, length, dimensions[2], dimensions[1], dimensions[0], dimensions[2] * dimensions[1] * dimensions[0], dimensions[1] * dimensions[0], dimensions[0], 1);
        // .getDenseAndFree(gpu);//.moveTo(gpu.getDeviceNumber());
        @Nullable final CudaTensor lPtr = gpu.getTensor(leftData, precision, MemoryType.Device, false);
        // .getDenseAndFree(gpu);//.moveTo(gpu.getDeviceNumber());
        @Nullable final CudaTensor rPtr = gpu.getTensor(rightData, precision, MemoryType.Device, false);
        @Nonnull final CudaMemory outputPtr = gpu.allocate(precision.size * Tensor.length(dimensions) * length, MemoryType.Managed, true);
        CudaMemory lPtrMemory = lPtr.getMemory(gpu);
        CudaMemory rPtrMemory = rPtr.getMemory(gpu);
        gpu.cudnnOpTensor(opDescriptor.getPtr(), precision.getPointer(leftFactor), lPtr.descriptor.getPtr(), lPtrMemory.getPtr(), precision.getPointer(rightFactor), rPtr.descriptor.getPtr(), rPtrMemory.getPtr(), precision.getPointer(0.0), outputDescriptor.getPtr(), outputPtr.getPtr());
        assert CudaDevice.isThreadDeviceId(gpu.getDeviceId());
        lPtrMemory.dirty();
        rPtrMemory.dirty();
        outputPtr.dirty();
        rPtrMemory.freeRef();
        lPtrMemory.freeRef();
        CudaTensor cudaTensor = CudaTensor.wrap(outputPtr, outputDescriptor, precision);
        Stream.<ReferenceCounting>of(opDescriptor, lPtr, rPtr).forEach(ReferenceCounting::freeRef);
        return CudaTensorList.wrap(cudaTensor, length, dimensions, precision);
    }, leftData), (@Nonnull final DeltaSet<Layer> buffer, @Nonnull final TensorList delta) -> {
        Runnable a = () -> {
            if (inObj[0].isAlive()) {
                CudaTensorList tensorList = CudaSystem.run(gpu -> {
                    @Nullable final CudaTensor lPtr = gpu.getTensor(delta, precision, MemoryType.Device, false);
                    @Nonnull final CudaMemory passbackPtr = gpu.allocate(precision.size * Tensor.length(dimensions) * length, MemoryType.Managed.normalize(), true);
                    @Nonnull final CudaDevice.CudaTensorDescriptor passbackDescriptor = gpu.newTensorDescriptor(precision, length, dimensions[2], dimensions[1], dimensions[0], dimensions[2] * dimensions[1] * dimensions[0], dimensions[1] * dimensions[0], dimensions[0], 1);
                    CudaMemory lPtrMemory = lPtr.getMemory(gpu);
                    gpu.cudnnTransformTensor(precision.getPointer(leftFactor), lPtr.descriptor.getPtr(), lPtrMemory.getPtr(), precision.getPointer(0.0), passbackDescriptor.getPtr(), passbackPtr.getPtr());
                    assert CudaDevice.isThreadDeviceId(gpu.getDeviceId());
                    passbackPtr.dirty();
                    lPtrMemory.dirty();
                    lPtrMemory.freeRef();
                    CudaTensor cudaTensor = CudaTensor.wrap(passbackPtr, passbackDescriptor, precision);
                    lPtr.freeRef();
                    return CudaTensorList.wrap(cudaTensor, length, dimensions, precision);
                }, delta);
                inObj[0].accumulate(buffer, tensorList);
            }
        };
        Runnable b = () -> {
            if (inObj[1].isAlive()) {
                CudaTensorList tensorList = CudaSystem.run(gpu -> {
                    @Nullable final CudaTensor lPtr = gpu.getTensor(delta, precision, MemoryType.Device, false);
                    @Nonnull final CudaMemory outputPtr = gpu.allocate(precision.size * Tensor.length(dimensions) * length, MemoryType.Managed.normalize(), true);
                    @Nonnull final CudaDevice.CudaTensorDescriptor passbackDescriptor = gpu.newTensorDescriptor(precision, length, dimensions[2], dimensions[1], dimensions[0], dimensions[2] * dimensions[1] * dimensions[0], dimensions[1] * dimensions[0], dimensions[0], 1);
                    CudaMemory lPtrMemory = lPtr.getMemory(gpu);
                    gpu.cudnnTransformTensor(precision.getPointer(rightFactor), lPtr.descriptor.getPtr(), lPtrMemory.getPtr(), precision.getPointer(0.0), passbackDescriptor.getPtr(), outputPtr.getPtr());
                    outputPtr.dirty();
                    lPtrMemory.dirty();
                    lPtrMemory.freeRef();
                    CudaTensor cudaTensor = CudaTensor.wrap(outputPtr, passbackDescriptor, precision);
                    lPtr.freeRef();
                    return CudaTensorList.wrap(cudaTensor, length, dimensions, precision);
                }, delta);
                inObj[1].accumulate(buffer, tensorList);
            }
        };
        if (CoreSettings.INSTANCE.isSingleThreaded())
            TestUtil.runAllSerial(a, b);
        else
            TestUtil.runAllParallel(a, b);
    }) {

        @Override
        protected void _free() {
            Arrays.stream(inObj).forEach(x -> x.freeRef());
            leftData.freeRef();
            rightData.freeRef();
        }

        @Override
        public boolean isAlive() {
            for (@Nonnull final Result element : inObj) if (element.isAlive()) {
                return true;
            }
            return false;
        }
    };
}

Example 10 with CudaMemory

use of com.simiacryptus.mindseye.lang.cudnn.CudaMemory in project MindsEye by SimiaCryptus.

the class ImgTileSelectLayer method copy.

/**
 * Copy cuda tensor.
 *
 * @param gpu              the gpu
 * @param input            the input
 * @param inputDimensions  the input dimensions
 * @param outputDimensions the output dimensions
 * @param positionX        the position x
 * @param positionY        the position y
 * @param precision        the precision
 * @param outputPtr        the output ptr
 * @return the cuda tensor
 */
public static CudaTensor copy(final CudnnHandle gpu, @Nonnull final TensorList input, final int[] inputDimensions, final int[] outputDimensions, final int positionX, final int positionY, final Precision precision, final CudaMemory outputPtr) {
    final int length = input.length();
    if (3 != inputDimensions.length)
        throw new IllegalArgumentException("inputDimensions.length");
    if (3 != outputDimensions.length)
        throw new IllegalArgumentException("dimOut.length");
    int bands = inputDimensions[2];
    if (bands != outputDimensions[2])
        throw new IllegalArgumentException(String.format("%d != %d", bands, outputDimensions[2]));
    // log.info(String.format("offset=%d,%d", offsetX, offsetY));
    @Nonnull final int[] viewDim = getViewDimensions(inputDimensions, outputDimensions, new int[] { positionX, positionY, 0 });
    @Nullable final CudaTensor inputTensor = gpu.getTensor(input, precision, MemoryType.Device, false);
    int sourceOffset = 0;
    int destinationOffset = 0;
    if (positionX < 0) {
        destinationOffset += Math.abs(positionX);
    } else {
        sourceOffset += Math.abs(positionX);
    }
    if (positionY < 0) {
        destinationOffset += outputDimensions[0] * Math.abs((positionY));
    } else {
        sourceOffset += inputTensor.descriptor.hStride * (Math.abs(positionY));
    }
    assert sourceOffset >= 0;
    assert destinationOffset >= 0;
    assert sourceOffset + Tensor.length(viewDim) <= Tensor.length(inputDimensions);
    assert destinationOffset + Tensor.length(viewDim) <= Tensor.length(outputDimensions);
    @Nonnull final CudaDevice.CudaTensorDescriptor sourceViewDescriptor = gpu.newTensorDescriptor(// 
    precision, // 
    length, // 
    viewDim[2], // 
    viewDim[1], // 
    viewDim[0], // 
    inputTensor.descriptor.nStride, // 
    inputTensor.descriptor.cStride, // 
    inputTensor.descriptor.hStride, inputTensor.descriptor.wStride);
    CudaMemory inputTensorMemory = inputTensor.getMemory(gpu);
    try {
        if (Arrays.equals(viewDim, outputDimensions)) {
            assert sourceOffset >= 0;
            assert destinationOffset == 0;
            return CudaTensor.wrap(inputTensorMemory.withByteOffset(sourceOffset * precision.size), sourceViewDescriptor, precision);
        }
        @Nonnull final CudaDevice.CudaTensorDescriptor destinationViewDescriptor = gpu.newTensorDescriptor(// 
        precision, // 
        length, // 
        viewDim[2], // 
        viewDim[1], // 
        viewDim[0], // 
        outputDimensions[2] * outputDimensions[1] * outputDimensions[0], // 
        outputDimensions[1] * outputDimensions[0], // 
        outputDimensions[0], 1);
        CudaSystem.handle(gpu.cudnnTransformTensor(precision.getPointer(1.0), sourceViewDescriptor.getPtr(), inputTensorMemory.getPtr().withByteOffset(sourceOffset * precision.size), precision.getPointer(1.0), destinationViewDescriptor.getPtr(), outputPtr.getPtr().withByteOffset(destinationOffset * precision.size)));
        assert CudaDevice.isThreadDeviceId(gpu.getDeviceId());
        outputPtr.dirty();
        inputTensorMemory.dirty();
        Stream.<ReferenceCounting>of(sourceViewDescriptor, destinationViewDescriptor).forEach(ReferenceCounting::freeRef);
        @Nonnull final CudaDevice.CudaTensorDescriptor passbackDescriptor = gpu.newTensorDescriptor(// 
        precision, // 
        length, // 
        outputDimensions[2], // 
        outputDimensions[1], // 
        outputDimensions[0], // 
        outputDimensions[2] * outputDimensions[1] * outputDimensions[0], // 
        outputDimensions[1] * outputDimensions[0], // 
        outputDimensions[0], 1);
        Stream.<ReferenceCounting>of(inputTensor).forEach(ReferenceCounting::freeRef);
        return CudaTensor.wrap(outputPtr, passbackDescriptor, precision);
    } finally {
        inputTensorMemory.freeRef();
    }
}