// Copyright 2018 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto3";

option optimize_for = LITE_RUNTIME;

package metrics_event;
option go_package = "chromiumos/system_api/metrics_event_proto";

// Content of signals emitted by Chrome (the ChromeEvent signal in the
// MetricsEventService) and the anomaly_detector daemon (the AnomalyEvent
// signal in the AnomalyEventService) to report events of interest for
// measurements.
message Event {
  // Event types.
  enum Type {
    TAB_DISCARD = 0;
    OOM_KILL = 1;   // obsolete---use OOM_KILL_BROWSER instead
    TAB_SWITCH = 2;
    OOM_KILL_BROWSER = 3;
    OOM_KILL_KERNEL = 4;
  }

  // The type of the event being signaled.
  Type type = 1;

  // The time of the event (CLOCK_MONOTONIC in milliseconds).
  int64 timestamp = 2;
}