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4a69d77b38
Tune the TCP stack and driver resources for the WHC Wi-Fi data path on both rtl8720f_evb and pke8721daf (NuttX runs on the application core; the Wi-Fi MAC runs on a companion core reached over an on-chip IPC): - Cap the advertised TCP receive window (NET_RECV_BUFSIZE=10000) to about the out-of-order reassembly capacity and bound in-flight TX (NET_SEND_BUFSIZE=16384). The stock unbounded window/queue let the peer and the local stack burst far more than the Wi-Fi path can smooth, causing bursty loss/reordering and RTO stalls (RX), and starving incoming-ACK processing so the peer window collapses and spurious retransmits tear the link down (TX). - Keep out-of-order reassembly (NET_TCP_OUT_OF_ORDER) but disable selective ACK. PR #19353 enabled NET_TCP_SELECTIVE_ACK on both boards; on the lossy Wi-Fi TX path the sender-side selective-ACK recovery does not reliably repair multi-segment holes and stalls TX, so NewReno with out-of-order reassembly is used instead -- same steady-state throughput, robust recovery. - Widen IOB buffers to 512 bytes; the window and out-of-order buffers draw from the shared IOB pool at run time and add no static memory. - Drop the busy-wait retry in the transmit path (the send-buffer cap makes it dead code) and lower the forced host TX skb count (skb_num_ap) to 8, which covers the NP's transient TX backlog without over-reserving AP heap. Signed-off-by: raul_chen <raul_chen@realsil.com.cn> |
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