masayuki2009 commented on PR #7920:
URL: https://github.com/apache/nuttx/pull/7920#issuecomment-1358676770
@anchao
The performance is improved without the 2nd patch (`mm/iob: decoupling iob_s
and io_data`)
```
nsh> uname -a
NuttX 10.4.0 cbd7ca2722 Dec 20 2022 09:24:20 arm64 qemu-armv8a
nsh> ps
PID GROUP CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK
USED FILLED COMMAND
0 0 0 0 FIFO Kthread N-- Assigned 00000000 008144
001040 12.7% CPU0 IDLE
1 1 1 0 FIFO Kthread N-- Running 00000000 008144
000320 3.9% CPU1 IDLE
2 2 2 0 FIFO Kthread N-- Running 00000000 008144
000320 3.9% CPU2 IDLE
3 3 3 0 FIFO Kthread N-- Running 00000000 008144
000080 0.9% CPU3 IDLE
4 4 --- 192 RR Kthread --- Waiting Semaphore 00000000 008096
000496 6.1% hpwork 0x402d65d8
5 5 --- 100 RR Kthread --- Waiting Semaphore 00000000 008096
001184 14.6% lpwork 0x402d6608
6 6 0 100 RR Task --- Running 00000000 008112
002288 28.2% nsh_main
7 7 --- 100 RR Task --- Waiting Semaphore 00000010 008112
001216 14.9% telnetd
nsh> iperf -s -i 1
IP: 10.0.2.15
mode=tcp-server sip=10.0.2.15:5001,dip=0.0.0.0:5001, interval=1, time=0
accept: 10.0.2.2,58396
Interval Transfer Bandwidth
0.00- 1.01 sec 29257964 Bytes 231.68 Mbits/sec
1.01- 2.02 sec 29480320 Bytes 232.67 Mbits/sec
2.02- 3.03 sec 30835200 Bytes 243.56 Mbits/sec
3.03- 4.04 sec 30975360 Bytes 244.55 Mbits/sec
4.04- 5.05 sec 32493760 Bytes 256.44 Mbits/sec
closed by the peer: 10.0.2.2,58396
iperf exit
```
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