fdcavalcanti commented on PR #18011:
URL: https://github.com/apache/nuttx/pull/18011#issuecomment-3784321145
@zhhyu7 I tried on the `esp32-devkitc` and `esp32c6-devkit` because it has
easier debug. Also, I enabled DEBUG_ASSERTIONS. On IPERF start, it immediately
crashed:
- ESP32:
```
nsh> iperf -c 192.168.0.125 -i 3 -t 10 &
iperf [12:100]
nsh> IP: 192.168.0.85
mode=tcp-client sip=192.168.0.85:5001,dip=192.168.0.125:5001, interval=3,
time=10
Interval Transfer Bandwidth
[CPU1] dump_assert_info: Current Version: NuttX 10.4.0 21c19b7824 Jan 22
2026 09:56:18 xtensa
[CPU1] dump_assert_info: Assertion failed ((wrb)->wb_sent) <=
((wrb)->wb_iob->io_pktlen): at file: tcp/tcp_send_buffered.c:1173 task(CPU1):
iperf_traffic process: iperf 0x4011a890
...
```
- ESP32-C6:
```
nsh> iperf -c 192.168.0.125 -i 3 -t 10 &
iperf [9:100]
nsh> IP: 192.168.0.3
mode=tcp-client sip=192.168.0.3:5001,dip=192.168.0.125:5001, interval=3,
time=10
Interval Transfer Bandwidth
dump_assert_info: Current Version: NuttX 10.4.0 21c19b7824 Jan 22 2026
10:04:02 risc-v
dump_assert_info: Assertion failed ((wrb)->wb_sent) <=
((wrb)->wb_iob->io_pktlen): at file: tcp/tcp_send_buffered.c:1173 task: lpwork
process: Kernel 0x4200702e
...
```
Seems they crash at the same place.
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