Hi all, We are currently working on a project called OpenCN which is a framework deeply inspired from LinuxCNC, but with a revisited architecture. Hence, OpenCN is related to machine control.
Our framework mainly use a AMP approach and runs the Xenomai/Cobalt kernel on a dedicated CPU with no I-pipe (reworked out). (We plan to release the framework by first of November). Our framework works well on a x86 PC, but we have to face an issue regarding DMA priority between the GPU and CPU; when the user plays with the GUI, some small latencies (O(10ms)) raise up. Although the question is not directly related to Xenomai, I would be very interested if somebody knows if it possible to give CPU priority against the GPU, and how to manage the related DMA controller? Is it possible to configure it ? Or any other hint to avoid this latency ? Many thanks in advance for any inputs. Daniel
