Function cutensorReduce 

pub unsafe extern "C" fn cutensorReduce(
    handle: cutensorHandle_t,
    plan: cutensorPlan_t,
    alpha: *const c_void,
    A: *const c_void,
    beta: *const c_void,
    C: *const c_void,
    D: *mut c_void,
    workspace: *mut c_void,
    workspaceSize: u64,
    stream: cudaStream_t,
) -> cutensorStatus_t

Performs the tensor reduction that is encoded by plan (see cutensorCreateReduction).

Parameters

• handle: Opaque handle holding cuTENSOR’s library context.
• plan: Opaque handle holding the reduction execution plan (created by cutensorCreateReduction followed by cutensorCreatePlan).
• alpha: Scaling for A. Its data type is determined by ‘descCompute’ (see cutensorOperationDescriptorGetAttribute(desc, CUTENSOR_OPERATION_SCALAR_TYPE)). Pointer to the host memory.
• A: Pointer to the data corresponding to A in device memory. Pointer to the GPU-accessible memory. The data accessed via this pointer must not overlap with the elements written to D.
• beta: Scaling for C. Its data type is determined by ‘descCompute’ (see cutensorOperationDescriptorGetAttribute(desc, CUTENSOR_OPERATION_SCALAR_TYPE)). Pointer to the host memory.
• C: Pointer to the data corresponding to C in device memory. Pointer to the GPU-accessible memory.
• D: Pointer to the data corresponding to C in device memory. Pointer to the GPU-accessible memory.
• workspace: Scratchpad (device) memory of size —at least— workspaceSize bytes; the workspace must be aligned to 256 bytes (i.e., the default alignment of cudaMalloc).
• workspaceSize: Please use cutensorEstimateWorkspaceSize() to query the required workspace.
• stream: The CUDA stream in which all the computation is performed.