[wasm][gc] Track number of GCs triggered per module

We currently have the problem that we trigger too many code GCs since
{new_potentially_dead_code_size_} is never reset to zero.
This CL adds a counter which tells us how many GCs we ran per native
module. This counter is sampled on each code GC. It will give us a
good understanding of the amount of GC work we are executing in the
wild. The number should stay in the single-digits generally.

R=mstarzinger@chromium.org, mpearson@chromium.org

Bug: v8:8217
Change-Id: I978a98dff76e0f466ff51e067626886b58d52ded
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1615246
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61611}
3 files changed
tree: 08fe21b3b27a6fd259a5c2f43fe79256d2abd1d5
  1. benchmarks/
  2. build_overrides/
  3. custom_deps/
  4. docs/
  5. gni/
  6. include/
  7. infra/
  8. samples/
  9. src/
  10. test/
  11. testing/
  12. third_party/
  13. tools/
  14. .clang-format
  15. .clang-tidy
  16. .editorconfig
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. .vpython
  22. .ycm_extra_conf.py
  23. AUTHORS
  24. BUILD.gn
  25. ChangeLog
  26. CODE_OF_CONDUCT.md
  27. codereview.settings
  28. DEPS
  29. ENG_REVIEW_OWNERS
  30. INFRA_OWNERS
  31. LICENSE
  32. LICENSE.fdlibm
  33. LICENSE.strongtalk
  34. LICENSE.v8
  35. LICENSE.valgrind
  36. OWNERS
  37. PRESUBMIT.py
  38. README.md
  39. snapshot_toolchain.gni
  40. WATCHLISTS
README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://v8.dev/docs

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*

Contributing

Please follow the instructions mentioned at v8.dev/docs/contribute.