# LinuxCNC - expose realtime tuning knobs to the plugdev group so that # rtapi_app can tune latency without CAP_DAC_OVERRIDE when running under # file capabilities. setuid-root builds do not need this rule. # /dev/cpu_dma_latency: harden_rt() opens this to pin CPU idle states at # C0, cutting wake-up jitter on AC-powered machines. Default is 0600 # root:root, so an unprivileged rtapi_app would fail to open it. KERNEL=="cpu_dma_latency", MODE="0660", GROUP="plugdev"