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Maxime Chevalier-Boisvert 2022-12-07 15:00:18 -05:00 committed by GitHub
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@ -576,10 +576,10 @@ The following deprecated APIs are removed.
### YJIT ### YJIT
* YJIT now supports both x86-64 and arm64/aarch64 CPUs on Linux, MacOS, BSD and other UNIX platforms. * YJIT now supports both x86-64 and arm64/aarch64 CPUs on Linux, MacOS, BSD and other UNIX platforms.
* This release brings support for Mac M1/M2, AWS Graviton and Raspberry Pi 4 ARM64 processors. * This release brings support for Mac M1/M2, AWS Graviton and Raspberry Pi 4.
* Building YJIT requires Rust 1.58.0+. [[Feature #18481]] * Building YJIT now requires Rust 1.58.0+. [[Feature #18481]]
* In order to ensure that CRuby is built with YJIT, please install rustc >= 1.58.0 and * In order to ensure that CRuby is built with YJIT, please install `rustc` >= 1.58.0
run `./configure` with `--enable-yjit`. before running `./configure`
* Please reach out to the YJIT team should you run into any issues. * Please reach out to the YJIT team should you run into any issues.
* Physical memory for JIT code is lazily allocated. Unlike Ruby 3.1, * Physical memory for JIT code is lazily allocated. Unlike Ruby 3.1,
the RSS of a Ruby process is minimized because virtual memory pages the RSS of a Ruby process is minimized because virtual memory pages
@ -587,11 +587,11 @@ The following deprecated APIs are removed.
memory pages until actually utilized by JIT code. memory pages until actually utilized by JIT code.
* Introduce Code GC that frees all code pages when the memory consumption * Introduce Code GC that frees all code pages when the memory consumption
by JIT code reaches `--yjit-exec-mem-size`. by JIT code reaches `--yjit-exec-mem-size`.
* RubyVM::YJIT.runtime_stats returns Code GC metrics in addition to * `RubyVM::YJIT.runtime_stats` returns Code GC metrics in addition to
existing `inline_code_size` and `outlined_code_size` keys: existing `inline_code_size` and `outlined_code_size` keys:
`code_gc_count`, `live_page_count`, `freed_page_count`, and `freed_code_size`. `code_gc_count`, `live_page_count`, `freed_page_count`, and `freed_code_size`.
* Most of the statistics produced by RubyVM::YJIT.runtime_stats are now available in release builds. * Most of the statistics produced by `RubyVM::YJIT.runtime_stats` are now available in release builds.
* Simply run ruby with `--yjit-stats` to compute stats (incurs some run-time overhead). * Simply run ruby with `--yjit-stats` to compute and dump stats (incurs some run-time overhead).
* YJIT is now optimized to take advantage of object shapes. [[Feature #18776]] * YJIT is now optimized to take advantage of object shapes. [[Feature #18776]]
* Take advantage of finer-grained constant invalidation to invalidate less code when defining new constants. [[Feature #18589]] * Take advantage of finer-grained constant invalidation to invalidate less code when defining new constants. [[Feature #18589]]
* The default `--yjit-exec-mem-size` is changed to 128 (MiB). * The default `--yjit-exec-mem-size` is changed to 128 (MiB).