How to realize that the perfetto process will not exit when receiving multiple ctrlc signals？ about perfetto HOT 3 CLOSED

I think what you really want here is --clone, where you can clone an existing session in another file without stopping.

Something like:

# Run the main perfetto instance that will go on forever
./perfetto --txt -c config.txt -o /dev/null   # the output file here is irrelevant

Then take a note of the tracing session ID using perfetto --query

Then when you want to take snapshots you can do

perfetto --clone $ID -o /path/to/snapshot

Alternative method

Note also that there is an alternative way to achieve induce self-clones using a combination of

trigger_config {
  triggers: {
    name: "my-trigger-name"
    stop_delay_ms: 2000
  }
  trigger_mode: CLONE_SNAPSHOT
}

And start a trace as ./perfetto --txt -c config.txt -o out_trace.pftrace

and then you can invoke trigger_perfetto "my-trigger-name"

Each snapshot in this case will end up in a new file, like out_trace-1.pftrace, out_trace-2.pftrace and so on

from perfetto.

Thanks!
However, the trigger mode must set the trigger_timeout_ms value, and the maximum is 7days. What we want to achieve is that perfetto cmd is always running (duration_ms: 0), and the perfetto process will not exit after triggering the trigger.

from perfetto.

Unfortunately I think you'll have to at least restart every 7 days. When you use triggers, trigger_timeout_ms becomes effectively duration_ms as it defines the lifetime of the main instance (which you don't care about).

from perfetto.