third_party/metrics_proto/execution_context.proto

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;
option java_package = "org.chromium.components.metrics";

option java_outer_classname = "ExecutionContextProtos";

package metrics;

// Enums corresponding to the Chrome execution context in which data was
// collected.

// Chrome process type. Derived from content/public/common/process_type.h.
enum Process {
  UNKNOWN_PROCESS = 0;
  BROWSER_PROCESS = 1;
  RENDERER_PROCESS = 2;
  GPU_PROCESS = 3;
  UTILITY_PROCESS = 4;
  ZYGOTE_PROCESS = 5;
  SANDBOX_HELPER_PROCESS = 6;
  PPAPI_PLUGIN_PROCESS = 7;
  PPAPI_BROKER_PROCESS = 8;
  NETWORK_SERVICE_PROCESS = 10;

  // A Chrome process not identified by any other enum. Defined for the benefit
  // of Chrome OS. Do not use for the Chrome sampling profiler; define a new
  // enum instead.
  OTHER_PROCESS = 9;
}

// Chrome thread. This list is not exhaustive.
enum Thread {
  UNKNOWN_THREAD = 0;

  // The 'main thread' in various processes. In browser process, this is
  // sometimes also called the 'ui thread'.
  MAIN_THREAD = 1;

  FILE_THREAD = 2;                // Deprecated.
  FILE_USER_BLOCKING_THREAD = 3;  // Deprecated.
  PROCESS_LAUNCHER_THREAD = 4;    // Deprecated.
  CACHE_THREAD = 5;               // Deprecated.

  IO_THREAD = 6;

  DB_THREAD = 7;        // Deprecated.
  GPU_MAIN_THREAD = 8;  // Deprecated.
  RENDER_THREAD = 9;    // Deprecated.
  UTILITY_THREAD = 10;  // Deprecated.

  // Compositor thread (can be in both renderer and gpu processes).
  COMPOSITOR_THREAD = 11;

  // Task scheduler thread.
  SCHEDULER_WORKER_THREAD = 13;

  COMPOSITOR_TILE_WORKER_THREAD = 14;

  SERVICE_WORKER_THREAD = 15;

  // DedicatedWorker thread in the renderer process.
  DEDICATED_WORKER_THREAD = 18;

  // Thread pool thread (can be in different Chrome processes).
  THREAD_POOL_THREAD = 16;

  // GPU memory thread (in renderer process).
  GPU_MEMORY_THREAD = 17;

  // The thread for Chrome memory tracing (can be in different processes).
  MEMORY_INFRA_THREAD = 19;

  // Media thread (in renderer process).
  MEDIA_THREAD = 20;

  // WebRTC threads, e.g. WebRTC_Signaling,WebRTC_Network (in renderer process).
  WEBRTC_THREAD = 21;

  // DRM threads (in GPU process).
  DRM_THREAD = 22;

  // Audio device threads (in renderer process), a worker thread type used to
  // transfer data between the browser and the renderer process.
  AUDIO_DEVICE_THREAD = 23;

  // Audio threads that are not in the renderer processes.
  AUDIO_THREAD = 24;

  // Dav1d worker threads (in renderer process), which runs the AV1 codec.
  DAV1D_WORKER_THREAD = 25;

  // Stack sampling profiler uses this thread to periodically stop a thread
  // and get stack execution information.
  // Spawned at
  // https://source.chromium.org/chromium/chromium/src/+/main:base/profiler/stack_sampling_profiler.cc;l=379;drc=ada6c70d141251b40840a6cab657737bf63eed9d.
  STACK_SAMPLING_THREAD = 26;

  // Used for batching frames for video streams.
  // Spawned at
  // https://source.chromium.org/chromium/chromium/src/+/main:content/renderer/renderer_blink_platform_impl.cc;l=988;drc=7172fffc3c545134d5c88af8ab07b04fcb1d628e.
  VIDEO_FRAME_COMPOSITOR_THREAD = 27;

  // A Chrome thread not identified by any other enum. Defined for the benefit
  // of Chrome OS. Do not use for the Chrome sampling profiler; define a new
  // enum instead.
  OTHER_THREAD = 12;
}

// Process phases, or where in the lifetime of the process it is such as
// startup, normal operation, shutdown, etc. These don't necessarily occur in
// the order defined here so it's fine to add new ones to further segregrate
// the lifetime of a process.
enum ProcessPhase {
  // The browser's main message loop has been started.
  // Based on histogram Startup.MessageLoopStartTime
  MAIN_LOOP_START = 0;

  // The beginning of navigation in the first web contents' main frame.
  // Based on histogram Startup.FirstWebContents.MainNavigationStart
  MAIN_NAVIGATION_START = 1;

  // The navigation is committed (first bytes received) in the first web
  // contents' main frame.
  // Based on histogram Startup.FirstWebContents.MainNavigationFinished
  MAIN_NAVIGATION_FINISHED = 2;

  // First non-empty paint of the first web contents.
  // Based on histogram Startup.FirstWebContents.NonEmptyPaint2
  FIRST_NONEMPTY_PAINT = 3;

  // Process shutdown has begun.
  SHUTDOWN_START = 4;
}