On 6/22/2020 4:07 AM, Wright Feng wrote:
Linux 3.6 introduces TSQ which has a per socket threshold for TCP Tx packet to reduce latency. In flow control mode, host driver enqueues skb in hanger and TCP doesn't push new skb frees until host frees the skb when receiving fwstatus event. So set pacing shift 8 to send them as a single large aggregate frame to the bus layer. 43455 TX TCP throughput in FC mode 2 on Linux 5.4.18 sk_pacing_shift : Throughput 10: 190 Mbps 9: 216 Mbps 8: 233 Mbps (Max throughput) 7: 233 Mpbs
In this patch the pacing shift update is done irrespective of the FC mode so I would like to see similar measurements for the other FC mode configurations.
Regards, Arend
