| # Example C++ Trace Provider |
| |
| This directory contains a simple C++ trace provider that demonstrates setting up a trace provider |
| and emitting the various types of trace events. |
| |
| ## Building and Running |
| |
| To build and run this example add to your fx set command: |
| |
| ``` |
| fx set <...> --with //src/performance/example_trace_provider |
| ``` |
| |
| After `fx build`ing and running `fx serve`, start the component: |
| |
| ``` |
| ffx component run /core/ffx-laboratory:example_trace_provider 'fuchsia-pkg://fuchsia.com/example_trace_provider#meta/example_trace_provider.cm' |
| ``` |
| |
| ## Tracing |
| Now we can take a trace of our component: |
| |
| ``` |
| ffx trace start --duration 2 --categories "example" |
| ``` |
| |
| The trace will be saved to `trace.fxt` in the current directory and you can upload it to |
| [ui.perfetto.dev](ui.perfetto.dev) to view the trace. |
