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  17. 17 Mar, 2017 1 commit
    • neis's avatar
      Disentangle assembler from isolate. · 94b088ca
      neis authored 
      This is a first step towards moving Turbofan code generation off the main thread.

Summary of the changes:
- AssemblerBase no longer has a pointer to the isolate. Instead, its
  constructor receives the few things that it needs from the isolate (on most
  architectures this is just the serializer_enabled flag).
- RelocInfo no longer has a pointer to the isolate. Instead, the functions
  that need it take it as an argument.  (There are currently still a few that
  implicitly access the isolate through a HeapObject.)
- The MacroAssembler now explicitly holds a pointer to the isolate (before, it
  used to get it from the Assembler).
- The jit_cookie also moved from AssemblerBase to the MacroAssemblers, since
  it's not used at all in the Assemblers.
- A few architectures implemented parts of the Assembler with the help
  of a Codepatcher that is based on MacroAssembler.  Since the Assembler no
  longer has the isolate, but the MacroAssembler still needs it, this doesn't
  work anymore.  Instead, these Assemblers now use a new PatchingAssembler.

BUG=v8:6048

Review-Url: https://codereview.chromium.org/2732273003
Cr-Commit-Position: refs/heads/master@{#43890}
      94b088ca
  19. 16 Mar, 2017 1 commit
    • Michael Lippautz's avatar
      [heap] Remove IsSweepingCompleted(AllocationSpace) · 0c0a4f0e
      Michael Lippautz authored 
      Adjusting the count requires us to call into Semaphore::WaitFor which
even on a z840 introduces a pause of at least 50us. We often call in
here from the unmapper that tries to add pages. E.g. for reducing the
new space size of 8M we call this for 16x2 pages, resulting in a pause
of 1.6ms for just checking the status of the sweeper tasks.

Avoiding reducing the count reduces the epilogue times. Example: FB
infinite scroll:

Before:
  heap.epilogue
    len: 102
    min: 0.01
    max: 4.83
    avg: 0.140196078431
    [0,5[: 102
After:
  heap.epilogue
    len: 106
    min: 0.01
    max: 0.24
    avg: 0.0260377358491
    [0,5[: 106

BUG=

Change-Id: I296c20ae3ac4b65218e4e038a9dbce504160a764
Reviewed-on: https://chromium-review.googlesource.com/455839
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43863}
      0c0a4f0e
  21. 15 Mar, 2017 1 commit
  23. 08 Mar, 2017 3 commits
  25. 03 Mar, 2017 1 commit
  27. 02 Mar, 2017 2 commits
  29. 01 Mar, 2017 1 commit
  31. 25 Feb, 2017 1 commit
  33. 24 Feb, 2017 1 commit
  35. 23 Feb, 2017 1 commit
  37. 22 Feb, 2017 1 commit
  39. 17 Feb, 2017 1 commit
    • Michael Lippautz's avatar
      [heap] GC-based fast promotion mode · a8e3925e
      Michael Lippautz authored 
      A fast promotion mode that works solely on GC heuristics without
requiring compiler or other profiler support by implementing zero-copy 
evacuation for new space.

- Once a threshold of survived bytes in the Scavenger is reached the
  mode is activated.
- In fast promotion mode all pages are moved to old space instead of
  performing a Scavenge.
- The inevitable upcoming full MC determines whether the decision
  whether the mode should stay on or be turned off based on the young
  generation survival rate.

BUG=chromium:693413

Change-Id: Ifdf296092a9bac609f9dcdfb47a24046f3093745
Reviewed-on: https://chromium-review.googlesource.com/442560
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43276}
      a8e3925e
  41. 15 Feb, 2017 1 commit
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  47. 01 Feb, 2017 1 commit
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  53. 16 Jan, 2017 1 commit
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