about new ftrace event about perfetto HOT 3 CLOSED

it is displayed well with the structure variable in perfetto ui. Is the guide for other use cases?

Please see "Kernel Tracing" section at https://perfetto.dev/docs/tracing-101#recording-traces. TLDR: we encode ftrace events we don't know about very inefficiently as "generic" events: what you are seeing in the UI is this generic encoding at work.

ftrace_bundle_tokenizer_errors

This is a generic error which happens when there is a very serious failure in our ability to parse the trace. Without having the actual trace to look at, this is ~impossible to debug.

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I don't think I understand what i needs to be modified yet ( for new ftrace event )
Do I need to update the perfetto ui code to add a new event and see it in ui?
( To be exact, it's about the trace processor ? )

from perfetto.

The instructions at https://perfetto.dev/docs/contributing/common-tasks#add-a-new-ftrace-event explain exactly what you need to do. It's not just modifying trace processor, you also need to change the collection code so that we can generate the real proto events instead of generic events.

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