Online / 5 & 6 February 2022


Porting Signal processing algorithms to CuPy for precision measurement

At European Organization for Nuclear Research(CERN), for the alignment of large superconducting magnets and cryogenics, an interferometry based system is being devised to identify the position of their elements. This technique uses interferometry principle and uses sweeping laser to identify the distance of multiple points using Fourier Analysis. The data acquired from photo-detection module, received after a sweep of laser source, needs to undergo sophisticated post processing to obtain the final results. The system must monitor position of a large number of elements every second. Dealing with 1000s of target points in less than 1 second required time-optimized and precise calculation. Thus, GPU was employed to provide faster and precise results. This required to use signal processing algorithms like: Butterworth Filter, Hilbert Transform, Savitzky-Golay smoothing Filter in GPU. This talk will cover steps involved in adopting signal processing algorithm to GPU to achieve better performance and understand the effects of parallelism achieved. For the initial development, CuPy library for NVIDIA GPUs is used and later moved to implementation in C. CuPy provides wrapper for most of the CUDA toolkit in Python. We will also provide highlight about performance metrics with respect to increase in the data size and possible optimizations of its processing.


Mamta Shukla