Send cdc msgs and write data inline if qp has sufficent inline space, helps latency reducing. In my test environment, which are 2 VMs running on the same physical host and whose NICs(ConnectX-4Lx) are working on SR-IOV mode, qperf shows 0.4us-1.3us improvement in latency. Test command: server: smc_run taskset -c 1 qperf client: smc_run taskset -c 1 qperf <server ip> -oo \ msg_size:1:2K:*2 -t 30 -vu tcp_lat The results shown below: msgsize before after 1B 11.9 us 10.6 us (-1.3 us) 2B 11.7 us 10.7 us (-1.0 us) 4B 11.7 us 10.7 us (-1.0 us) 8B 11.6 us 10.6 us (-1.0 us) 16B 11.7 us 10.7 us (-1.0 us) 32B 11.7 us 10.6 us (-1.1 us) 64B 11.7 us 11.2 us (-0.5 us) 128B 11.6 us 11.2 us (-0.4 us) 256B 11.8 us 11.2 us (-0.6 us) 512B 11.8 us 11.3 us (-0.5 us) 1KB 11.9 us 11.5 us (-0.4 us) 2KB 12.1 us 11.5 us (-0.6 us) Guangguan Wang (2): net/smc: send cdc msg inline if qp has sufficient inline space net/smc: rdma write inline if qp has sufficient inline space net/smc/smc_ib.c | 1 + net/smc/smc_tx.c | 17 ++++++++++++----- net/smc/smc_wr.c | 5 ++++- 3 files changed, 17 insertions(+), 6 deletions(-) -- 2.24.3 (Apple Git-128)
