Experiments#
This section presents the experiments conducted to evaluate AiSIO. The experiments are structured to build on each other. The first establishes the CPU-initiated IOPS ceiling and the optimal system configuration. The second quantifies the software abstraction overhead at each layer of the CPU-initiated I/O stack and shows how much of that overhead the uPCIe path eliminates. The third identifies where the I/O size crosses from IOPS-bound to bandwidth-bound operation. The final two examine device-initiated I/O, first varying I/O size to find the saturation boundary, then varying queue depth and queue count to find the combination that reaches device saturation.