masayuki2009 commented on PR #7129:
URL: https://github.com/apache/incubator-nuttx/pull/7129#issuecomment-1251850814
@xiaoxiang781216
During testing this PR with sabre-6quad:netknsh_smp on QEMU-6.2, I noticed
performance degradation.
Without this PR
```
nsh> iperf -s
IP: 10.0.2.15
mode=tcp-server sip=10.0.2.15:5001,dip=0.0.0.0:5001, interval=3, time=0
accept: 10.0.2.2,45746
Interval Transfer Bandwidth
0.00- 3.01 sec 41823160 Bytes 111.16 Mbits/sec
3.01- 6.03 sec 83822980 Bytes 111.26 Mbits/sec
6.03- 9.04 sec 125957120 Bytes 111.98 Mbits/sec
9.04- 12.05 sec 168108780 Bytes 112.03 Mbits/sec
12.05- 15.06 sec 210590400 Bytes 112.91 Mbits/sec
15.06- 18.07 sec 253308540 Bytes 113.54 Mbits/sec
18.07- 21.08 sec 296190200 Bytes 113.97 Mbits/sec
21.08- 24.09 sec 337715520 Bytes 110.37 Mbits/sec
24.09- 27.10 sec 380080340 Bytes 112.60 Mbits/sec
27.10- 30.11 sec 422694820 Bytes 113.26 Mbits/sec
30.11- 33.12 sec 464328180 Bytes 110.65 Mbits/sec
33.12- 36.13 sec 506558680 Bytes 112.24 Mbits/sec
36.13- 39.14 sec 549304560 Bytes 113.61 Mbits/sec
```
With this PR.
```
nsh> iperf -s
IP: 10.0.2.15
mode=tcp-server sip=10.0.2.15:5001,dip=0.0.0.0:5001, interval=3, time=0
accept: 10.0.2.2,45800
Interval Transfer Bandwidth
0.00- 3.01 sec 33917260 Bytes 90.15 Mbits/sec
3.01- 6.03 sec 70001160 Bytes 95.59 Mbits/sec
6.03- 9.04 sec 105947820 Bytes 95.54 Mbits/sec
9.04- 12.05 sec 141693000 Bytes 95.00 Mbits/sec
12.05- 15.06 sec 177392920 Bytes 94.88 Mbits/sec
15.06- 18.07 sec 213304540 Bytes 95.45 Mbits/sec
18.07- 21.08 sec 248973800 Bytes 94.80 Mbits/sec
21.08- 24.09 sec 284562760 Bytes 94.59 Mbits/sec
24.09- 27.10 sec 319335580 Bytes 92.42 Mbits/sec
27.10- 30.11 sec 353915680 Bytes 91.91 Mbits/sec
30.11- 33.12 sec 388157060 Bytes 91.01 Mbits/sec
33.12- 36.13 sec 422401360 Bytes 91.01 Mbits/sec
36.13- 39.14 sec 456855900 Bytes 91.57 Mbits/sec
```
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