From: Guangguan Wang <guangguan.wang@linux.alibaba.com>
To: kgraul@linux.ibm.com, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, leon@kernel.org
Cc: linux-s390@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next v2 0/2] net/smc: send and write inline optimization for smc
Date: Sat, 14 May 2022 18:27:37 +0800 [thread overview]
Message-ID: <20220514102739.41252-1-guangguan.wang@linux.alibaba.com> (raw)
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)
next reply other threads:[~2022-05-14 10:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-14 10:27 Guangguan Wang [this message]
2022-05-14 10:27 ` [PATCH net-next v2 1/2] net/smc: send cdc msg inline if qp has sufficient inline space Guangguan Wang
2022-05-15 17:10 ` Tony Lu
2022-05-14 10:27 ` [PATCH net-next v2 2/2] net/smc: rdma write " Guangguan Wang
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