{
  # Probe config for measuring JetStream and split profiles based on
  # measurement markers.
  "probes": {
    "perfetto": {
      "textproto":
        '''
        buffers {
          size_kb: 500000
          fill_policy: DISCARD
        }
        data_sources {
          config {
            name: "dev.v8.code"
          }
        }
        data_sources: {
            config {
                name: "org.chromium.trace_event"
            }
        }
        data_sources: {
            config {
                name: "track_event"
                track_event_config {
                    disabled_categories: "*"
                    enabled_categories: "blink.user_timing"
                    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_metadata"
            }
        }
        '''
    }
    "profiling": {
      "target": "RENDERER_PROCESS_ONLY"
    }

    # TODO: enable once query is fixed for v3.
    # trace_processor: {
    #   queries: [
    #     jetstream_3/perf_sample_span.sql
    #   ]
    # }
  }
}