masayuki2009 commented on PR #7920:
URL: https://github.com/apache/nuttx/pull/7920#issuecomment-1357296625
@anchao
I noticed that `iperf -s` performance with `qemu-armv8a:netnsh_smp` is not
so good compared to the latest upstream.
Latest upstream:
```
nsh> uname -a
uname -a
NuttX 12.0.0 6e66603da5 Dec 19 2022 17:30:16 arm64 qemu-armv8a
nsh> ps
ps
PID GROUP CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK
USED FILLED COMMAND
0 0 0 0 FIFO Kthread N-- Running 00000000 008144
001040 12.7% CPU0 IDLE
1 1 1 0 FIFO Kthread N-- Assigned 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 --- 100 RR Task --- Waiting Semaphore 00000000 008112
002288 28.2% nsh_main
7 7 --- 100 RR Task --- Waiting Semaphore 00000010 008112
001392 17.1% telnetd
10 10 1 100 RR Task --- Running 00000010 008112
002720 33.5% Telnet session
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: 10.0.2.2,38568
Interval Transfer Bandwidth
0.00- 1.01 sec 35423544 Bytes 280.20 Mbits/sec
1.01- 2.02 sec 37002240 Bytes 293.07 Mbits/sec
2.02- 3.03 sec 36266400 Bytes 287.13 Mbits/sec
3.03- 4.04 sec 36873760 Bytes 291.09 Mbits/sec
4.04- 5.05 sec 37142400 Bytes 294.06 Mbits/sec
closed by the peer: 10.0.2.2,38568
```
This PR:
```
nsh> uname -a
uname -a
NuttX 10.4.0 f4c530da3e Dec 19 2022 17:37:34 arm64 qemu-armv8a
nsh> ps
ps
PID GROUP CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK
USED FILLED COMMAND
0 0 0 0 FIFO Kthread N-- Running 00000000 008144
001040 12.7% CPU0 IDLE
1 1 1 0 FIFO Kthread N-- Assigned 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 --- 100 RR Task --- Waiting Semaphore 00000000 008112
002368 29.1% nsh_main
7 7 --- 100 RR Task --- Waiting Semaphore 00000010 008112
001392 17.1% telnetd
8 8 1 100 RR Task --- Running 00000010 008112
002720 33.5% Telnet session
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: 10.0.2.2,56102
Interval Transfer Bandwidth
0.00- 1.01 sec 25520364 Bytes 201.98 Mbits/sec
1.01- 2.02 sec 26209920 Bytes 206.93 Mbits/sec
2.02- 3.03 sec 24025760 Bytes 190.10 Mbits/sec
3.03- 4.04 sec 22997920 Bytes 181.19 Mbits/sec
4.04- 5.05 sec 22530720 Bytes 178.22 Mbits/sec
closed by the peer: 10.0.2.2,56102
```
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