how to save gnb trace result

[pchat-imm]

I config on gnb_zmq.conf files to have log as below. Currently I recieve /tmp/gnb.log and PCAP of MAC

log:
  filename: /tmp/gnb.log            # Path of the log file.
  all_level: info                   # Logging level applied to all layers.
  hex_max_size: 0
  tracing_filename: /tmp/gnb_trace.log
pcap:
  mac_enable: true                 # Set to true to enable MAC-layer PCAPs.
  mac_filename: /tmp/gnb_mac.pcap   # Path where the MAC PCAP is stored.
  ngap_enable: true                # Set to true to enable NGAP PCAPs.
  ngap_filename: /tmp/gnb_ngap.pcap # Path where the NGAP PCAP is stored.
  e2ap_enable: true                 # Set to true to enable E2AP PCAPs.
  e2ap_filename: /tmp/gnb_e2ap.pcap # Path where the E2AP PCAP is stored.

the gNB runs and shows trace on screen. However it does not save on file

what do I miss? I would like the trace file for further investigation. Or should I use only the /tmp/gnb.log file?

[pgawlowicz]

please use:

log: 
    tracing_filename:

[pchat-imm]

Ok, I see the du_traces.h file, Thank you.
I wonder on the chrome://tracing. How to see it?

[Zplusless]

open chrome and type chrome://tracing. you will enter The Trace Event Profiling Tool. Then you can load the gnb_trace.log and see the events.

[Zplusless]

Hi @frankist thanks for your guidance. The method you proposed are L1 AND L2 event traces, not the trace that @pchat-imm has mentioned. So how can I save the gnb output with 't' typed to a file? Probably with a time stamp? So I can trace how brate changes over time.

Thanks in advance.

[pgawlowicz]

Hi @Zplusless,
you need to enable the following:

metrics: 
  enable_json_metrics: true

Unfortunately, the metrics are not saved to a file but sent over UDP socket. You can receive it with python and write to file. Check the example python UDP receiver:
metric_receiver.py.txt

[Zplusless]

Thanks @pgawlowicz . We will try this method.

[pgawlowicz]

@Zplusless did it work?

[Zplusless]

Yes, it works well. Thanks for your guidance.