zhhyu7 opened a new pull request, #18211:
URL: https://github.com/apache/nuttx/pull/18211
## Summary
The main content of this submission is to limit both the TX/RX buffers of
TCP/UDP to throttled IOBs, avoiding impacts on the sending and receiving of
control-type messages.
and optimized TX for TCP buffered mode.
## Impact
*Update this section, where applicable, on how change affects users,
build process, hardware, documentation, security, compatibility, etc.*
## Testing
sim:matter with very small amount of IOB configuration
```
CONFIG_MM_IOB=y
CONFIG_IOB_NBUFFERS=40
CONFIG_IOB_BUFSIZE=196
CONFIG_IOB_ALIGNMENT=4
CONFIG_IOB_SECTION=""
CONFIG_IOB_NCHAINS=40
CONFIG_IOB_THROTTLE=10
```
NuttX test log:
```
nsh> iperf -c 10.0.1.1 -B 10.0.1.2
IP: 10.0.1.2
mode=tcp-client sip=10.0.1.2:5001,dip=10.0.1.1:5001, interval=3, time=30
Interval Transfer Bandwidth
0.00- 3.01 sec 148127744 Bytes 393.70 Mbits/sec
3.01- 6.02 sec 147177472 Bytes 391.17 Mbits/sec
6.02- 9.03 sec 132677632 Bytes 352.63 Mbits/sec
9.03- 12.04 sec 143818752 Bytes 382.24 Mbits/sec
12.04- 15.05 sec 148914176 Bytes 395.79 Mbits/sec
15.05- 18.06 sec 158990336 Bytes 422.57 Mbits/sec
18.06- 21.07 sec 140148736 Bytes 372.49 Mbits/sec
21.07- 24.08 sec 127320064 Bytes 338.39 Mbits/sec
24.08- 27.09 sec 129712128 Bytes 344.75 Mbits/sec
27.09- 30.10 sec 133414912 Bytes 354.59 Mbits/sec
0.00- 30.10 sec 1410301952 Bytes 374.83 Mbits/sec
iperf exit
nsh>
```
esp32c3-devkit:wifi board
NuttX test log:
```
nsh> iperf -c 10.212.241.242 &
iperf [13:100]
nsh> IP: 10.212.241.66
mode=tcp-client sip=10.212.241.66:5001,dip=10.212.241.242:5001, interval=3,
time=30
Interval Transfer Bandwidth
0.00- 3.01 sec 1359872 Bytes 3.61 Mbits/sec
3.01- 6.02 sec 1343488 Bytes 3.57 Mbits/sec
6.02- 9.03 sec 1458176 Bytes 3.88 Mbits/sec
9.03- 12.04 sec 1179648 Bytes 3.14 Mbits/sec
12.04- 15.05 sec 1425408 Bytes 3.79 Mbits/sec
15.05- 18.06 sec 1474560 Bytes 3.92 Mbits/sec
18.06- 21.07 sec 1376256 Bytes 3.66 Mbits/sec
21.07- 24.08 sec 1277952 Bytes 3.40 Mbits/sec
24.08- 27.09 sec 1261568 Bytes 3.35 Mbits/sec
27.09- 30.10 sec 1409024 Bytes 3.74 Mbits/sec
0.00- 30.10 sec 13565952 Bytes 3.61 Mbits/sec
iperf exit
iperf -c 10.212.241.242 &
iperf [22:100]
nsh> IP: 10.212.241.66
mode=tcp-client sip=10.212.241.66:5001,dip=10.212.241.242:5001, interval=3,
time=30
Interval Transfer Bandwidth
0.00- 3.01 sec 180224 Bytes 0.48 Mbits/sec
nsh> cat /proc/iobinfo
ntotal nfree nwait nthrottle
100 40 0 0
nsh> 3.01- 6.02 sec 376832 Bytes 1.00 Mbits/sec
6.02- 9.03 sec 491520 Bytes 1.31 Mbits/sec
9.03- 12.04 sec 1228800 Bytes 3.27 Mbits/sec
12.04- 15.05 sec 1048576 Bytes 2.79 Mbits/sec
15.05- 18.06 sec 1392640 Bytes 3.70 Mbits/sec
18.06- 21.07 sec 1327104 Bytes 3.53 Mbits/sec
21.07- 24.08 sec 1277952 Bytes 3.40 Mbits/sec
24.08- 27.09 sec 278528 Bytes 0.74 Mbits/sec
27.09- 30.10 sec 1130496 Bytes 3.00 Mbits/sec
0.00- 30.10 sec 8732672 Bytes 2.32 Mbits/sec
iperf exit
nsh> cat /proc/iobinfo
ntotal nfree nwait nthrottle
100 100 0 60
nsh>
nsh>
```
My local environment has a relatively high packet loss rate, so the
throughput is relatively low.
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