diff options
| author | Guangguan Wang <[email protected]> | 2022-05-16 13:51:36 +0800 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2022-05-17 17:34:12 -0700 |
| commit | b632eb06973209dfac1eba3a9fbd13f0041f3e45 (patch) | |
| tree | 4c7d6103c3754c826fdbe766559460e617fd0daa /tools/perf/scripts/python/intel-pt-events.py | |
| parent | 65a9dedc11d615d8f104a48d38b4fa226967b4ed (diff) | |
net/smc: send cdc msg inline if qp has sufficient inline space
As cdc msg's length is 44B, cdc msgs can be sent inline in
most rdma devices, which can help reducing sending latency.
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-0.7us 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 11.2 us (-0.7 us)
2B 11.7 us 11.2 us (-0.5 us)
4B 11.7 us 11.3 us (-0.4 us)
8B 11.6 us 11.2 us (-0.4 us)
16B 11.7 us 11.3 us (-0.4 us)
32B 11.7 us 11.3 us (-0.4 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 11.4 us (-0.4 us)
1KB 11.9 us 11.4 us (-0.5 us)
2KB 12.1 us 11.5 us (-0.6 us)
Signed-off-by: Guangguan Wang <[email protected]>
Reviewed-by: Tony Lu <[email protected]>
Tested-by: kernel test robot <[email protected]>
Acked-by: Karsten Graul <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/intel-pt-events.py')
0 files changed, 0 insertions, 0 deletions