58 lines
1.3 KiB
Markdown
58 lines
1.3 KiB
Markdown
# Multiple tracers
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To connect several tracers to the same process, first launch the `multi`
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tracer.
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Run as:
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```shell
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cd common/utils/T/tracer
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./multi -d ../T_messages.txt
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```
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Then connect other tracers (`enb`, `textlog`, `to_vcd`, etc.) to the
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`multi` tracer.
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For example (if you debug the `lte-softmodem`) in one terminal, run:
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```shell
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cd common/utils/T/tracer
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./enb -d ../T_messages.txt -p 2022
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```
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That will launch the GUI tool to analyze the proper running of the
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softmodem.
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And in another terminal, run:
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```shell
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cd common/utils/T/tracer
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./to_vcd -d ../T_messages.txt -p 2022 -vcd -o /tmp/openair_dump_eNB.vcd
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```
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That will dump the VCD traces generated by the softmodem to the
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file `/tmp/openair_dump_eNB.vcd`.
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The `multi` tracer waits for other tracers to connect to the port 2022.
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So you pass `-p 2022` to a tracer so that it connects to the `multi`
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tracer. This port can be changed with the `-lp` option.
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For example to listen to port 4321, run `multi` as:
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```shell
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./multi -d ../T_messages.txt -lp 4321
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```
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Then you would pass `-p 4321` to any tracer for it to connect to `multi`.
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As a reminder, to trace `lte-softmodem`, you run it as:
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```shell
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sudo ./lte-softmodem -O config_file.conf --T_stdout 0
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```
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The important part is `--T_stdout 0`.
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The order to launch the various programs (`multi`, the softmodem, other
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tracers) is not important.
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