CUDA kernel function parameters are passed to the device through constant memory and have been limited to 4,096 bytes. CUDA 12.1 increases this parameter limit from 4,096 bytes to 32,764 bytes on all device architectures including NVIDIA Volta and above. Before CUDA 12.1, passing kernel arguments exceeding 4,096 bytes required working around the kernel parameter limit by copying excess arguments into constant memory with cudaMemcpyToSymbol.