Using pipe to write stdin causes srslog error

[john-dooe]

I need to use python subprocess to run gnb, and write data to stdin. So I used gnb = subprocess.Popen(cmd , stdin=subprocess.PIPE)，but it causes srslog error:

Lower PHY in quad executor mode.

--== srsRAN gNB (commit e6c26f5) ==--

Connecting to AMF on 127.0.0.5:38412
srsLog error - The backend queue size is about to reach its maximum capacity of 8192 elements, new log entries will get discarded.
Consider increasing the queue capacity.
srsGNB ERROR: CU-CP failed to connect to AMF

I used pipe in bash, and it casues the same error.

echo -e "t\n" | sudo ./srsran/build/apps/gnb/gnb -c ./config/srsran/gnb_rf_b200_tdd_n78_20mhz.yml

How to solve this error?

[pgawlowicz]

Not sure about the usage of the pipe, but if you just want to enable the metric trace in gnb then add the following to your config:

metrics: 
  autostart_stdout_metrics: 1

[pgawlowicz]

if you want to receive metrics (formated in json) with Python then check here

[pgawlowicz]

@john-dooe did it solve your issues?