0e127bcef7
Introduce get_hints.py and combine_hints.py in order to make the interpretation of basic block counts into hints more configurable and explicit, as well as allowing more accurate and consistent methods of combining multiple profiles. get_hints.py allows for the minimum count and threshold ratio values to be easily altered for different profiles, while combine_hints.py allows the hints produced from different benchmarks and threshold values to be easily and sensibly combined. Simply summing together basic block counts from different benchmarks could previously lead to a longer running benchmark overshadowing multiple shorter benchmarks with conflicting hints. Allowing alteration of the current threshold values gives a doubling of performance, while the new method of combining distinct profiles can double the performance improvement of the secondary benchmark while losing as little as 4% of the improvement gained in the primary benchmark. Design doc: https://docs.google.com/document/d/1OhwZnIZom47IX0lyceyt-S9i8AApDB0UqJdvQD6NuKQ/edit?usp=sharing Bug: v8:10470 Change-Id: I1c09d1eabfdda5ed6794592e2c13ff8b461be361 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3545181 Reviewed-by: Tobias Tebbi <tebbi@chromium.org> Commit-Queue: George Wort <george.wort@arm.com> Cr-Commit-Position: refs/heads/main@{#80282} |
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| samples | ||
| src | ||
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| .vpython | ||
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| AUTHORS | ||
| BUILD.bazel | ||
| BUILD.gn | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
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| LICENSE | ||
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| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
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| PRESUBMIT.py | ||
| README.md | ||
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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.