config/doc/probe/trace_processor.config.hjson

// trace_processor probe example
{
  "probes": {
    "trace_processor": {
      // If necessary, a custom path for trace_processor_shell can be passed
      // trace_processor_bin: "/optional/path/to/trace_processor_shell"
      "queries": [
        // Queries can be specified as a reference to a file in
        // crossbench/probes/trace_processor/queries:
        "speedometer_cpu_time"
        // Or specified inline:
        {
          "name": "my_query"
          "sql": "select dur from slice where slice.name = 'my_slice'"
        }
      ]
      "metrics": [
        "trace_stats"
      ]
      // Additional directories containing trace processor modules
      // can be specified:
      "module_paths": [
        "/my_project/modules/ext"
      ]
      // Perfetto v2 metric definitions can be specified either inline
      // or as a path:
      "metric_definitions": [
        "./metric_def.textproto"
        
          '''
            metric_spec: {
              id: "inline_textproto_metric"
              value: "metric_column"
              query {
                id: "query_id"
                table {
                  table_name: "metric_table"
                  module_name: "module_name"
                  column_names: "metric_column"
                }
              }
            }
          '''
      ]
      // Metrics to include only in the trace summary can be specified.
      // summary_metrics will include everything in the 'metrics' list as well
      // as additional metrics (such as v2 metrics) specified here:
      "summary_metrics": [
        "file_metric_def_textproto"
        "inline_textproto_metric"
      ]
    }
    "perfetto": {
      "textproto":
        '''
          buffers {
            size_kb: 300000
            fill_policy: DISCARD
          }
          data_sources {
            config {
              name: "org.chromium.trace_metadata2"
            }
          }
          data_sources {
            config {
              name: "track_event"
              track_event_config {
                disabled_categories: "*"
                enabled_categories: "blink.user_timing"
                enabled_categories: "toplevel"
                enabled_categories: "__metadata"
                timestamp_unit_multiplier: 1000
                enable_thread_time_sampling: true
                filter_debug_annotations: false
                filter_dynamic_event_names: false
              }
            }
          }
          data_sources: {
            config {
                name: "linux.ftrace"
              ftrace_config {
                ftrace_events: "sched/sched_switch"
                ftrace_events: "power/suspend_resume"
                ftrace_events: "sched/sched_wakeup"
                ftrace_events: "sched/sched_wakeup_new"
                ftrace_events: "sched/sched_waking"
                ftrace_events: "sched/sched_process_exit"
                ftrace_events: "sched/sched_process_free"
                ftrace_events: "task/task_newtask"
                ftrace_events: "task/task_rename"
              }
            }
          }
        '''
    }
  }
}