Re: [dpdk-users] Unable to see traces from a user defined DPDK Tracepoint

[Sanjit Kumar <sanjit.kumar@aviznetworks.com>]

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Hi,

I am trying to test the usage of the DPDK trace library. I have run into
the same issue as recounted here -
https://mails.dpdk.org/archives/users/2020-December/005266.html
<https://mails.dpdk.org/archives/users/2020-December/005266.html> - where I
am able to build and run my DPDK application where I have created and
registered my custom trace point (verified via rte_trace_dump(stdout) which
says my traces are 'enabled' - i see the right trace buffer size, trace
file destination etc). The trace point creation and registration are
identical to what is mentioned in the program guide using RTE_TRACE_POINT
in a header file and registering it in my dpdk application via
RTE_TRACE_POINT_REGISTER macro.

What I notice are as follows:

1. The program builds and runs as intended.
2. The trace files are generated in the correct destination directory.
3. On using trace=.*  ----> I see a huge list of traces on viewing the
trace file with babeltrace - but do not see my custom trace point. I also
do not see any trace output from my dpdk application if I reuse DPDK
library traces ( eg: rte_eal_trace_thread_lcore_ready ) instead of
defining my own custom traces.
4. On using trace=<regex for traces used in my application> i do not see
any trace output just used inside my application.

I think the above observations suggest that the issue might be in
configuring my DPDK application to recognize and create trace output
properly. However the rte_trace_dump output suggests that trace is enabled
here.

What I would like to know is similar to utkarsh's question:
Is there anything I am missing in configuring my application to recognize
traces? If so can you please point it out?


Thanks and Regards,
Sanjit Kumar

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