config/doc/probe/perfetto.config.hjson

{
  "probes": {
    "perfetto": {
      // texproto can be directly copied from https://ui.perfetto.dev/#!/record?p=instructions
      // under the "recording command' settings.
      "textproto":
        '''
          buffers: {
              size_kb: 63488
              fill_policy: DISCARD
          }
          data_sources: {
              config {
                  name: "track_event"
                  track_event_config {
                      disabled_categories: "*"
                      enabled_categories: "disabled-by-default-v8.cpu_profiler"
                      enabled_categories: "toplevel"
                      enabled_categories: "toplevel.flow"
                      enabled_categories: "scheduler"
                      enabled_categories: "sequence_manager"
                      enabled_categories: "disabled-by-default-toplevel.flow"
                      enabled_categories: "__metadata"
                      timestamp_unit_multiplier: 1000
                      filter_debug_annotations: false
                      enable_thread_time_sampling: true
                      filter_dynamic_event_names: false
                  }
              }
          }
          data_sources: {
              config {
                  name: "org.chromium.trace_metadata2"
              }
          }
        '''
    }
  }
}