When we need to capture service flow among multiple processes, is the following image correct?
Or the first process need to call outgoingremotecall() and create a tag and then all preceding processes call incomingremotecalltrace(),share the tag the first process created?
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your chart is ok. don't forget to call tracer_end(...) - thats missing in your chart. for every tracer_start() call, you need to have a tracer_end() call.
about your question: no - please don't reuse (share) tags. a tag received by an outgoing tracer, should only be used once to start an incoming tracer.