During November 2025, this developer contributed to the ROCm/rocm-systems repository by implementing a SDMA Ring Doorbell mechanism within the SDMA user queue, targeting improved CPU-GPU task coordination. Using C++ and leveraging expertise in GPU and system programming, the work focused on enabling more reliable and lower-latency signaling for task management between CPU and GPU. This feature established a foundation for scalable, high-throughput task scheduling and reduced end-to-end latency in SDMA paths. The contribution was delivered as a single, well-documented feature, reflecting a focused and technically deep approach to enhancing communication infrastructure in heterogeneous computing environments.