1. 29 Jan, 2020 1 commit
  2. 13 Jan, 2020 1 commit
  3. 09 Jan, 2020 1 commit
    • Ulan Degenbaev's avatar
      [heap] Implement per-context marking worklist draining · e27e6fd6
      Ulan Degenbaev authored
      This changes the marking worklist draining for the main thread
      marker and the concurrent marker to use the following algorithm in
      per-context mode:
      1) Pop an object from the marking worklist.
      2) Try to infer the native context that owns the objects.
         This is done using a new NativeContextInferrer class.
      3) If the inference is successful, then change the active marking
         worklist to the worklist of the inferred native context.
      4) Otherwise, keep the current active marking worklist.
      5) Visit the object. Newly discovered objects will be pushed
         onto the active marking worklist.
      6) Account the object size for the native context corresponding
         to the active marking worklist.
         This is done using a new NativeContextStats class.
      
      The main property of the algorithm is that each object for which
      we couldn't infer the native context is either attributed to
      the native context retaining it or is not attributed to any native
      context.
      
      Bug: chromium:973627
      
      Change-Id: Ide4ab992275d115279f971d89ace657f4c05e176
      Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1981491
      Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
      Reviewed-by: 's avatarDominik Inführ <dinfuehr@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#65663}
      e27e6fd6