ModernGPU (by Sean Baxter) had been quite helpful to me in understanding performance factors in a GPU. The blogs are also well illustrated, some examples are

ModernGPU (by Sean Baxter) had been quite helpful to me in understanding performance factors in a GPU. The blogs are also well illustrated, some examples are https://moderngpu.github.io/scan.html https://moderngpu.github.io/scan.html https://moderngpu.github.io/mergesort.html https://moderngpu.github.io/mergesort.html I remember using their segmented sort and reduce to build a segmented mode.