You've definitely hit the hardware limit of the AP122. The ksoftirqd process handles software interrupts for network traffic. When streaming raw 139Mbps 4K remuxes over Wi-Fi, the AP's processor simply cannot keep up with frame processing, causing bu...
You've definitely reached a hardware limit. The single-core CPU on the AP122 struggles with high-bitrate local streams because processing 139 Mbps of raw wireless throughput triggers continuous kernel software interrupts (ksoftirqd/0), leaving no CPU...