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feat(compress): move workspace resize policy to Rust

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The CCtx reset orchestration already runs in Rust, but its C workspace
adapter still decided when capacity was too small or wasteful and maintained
the oversized-duration counter through C-only predicates. Move those factor,
threshold, overflow, and duration-update rules into Rust. C now supplies only
private workspace metrics and retains low-level allocation, reservation, and
layout operations.

Remove the obsolete C predicates so the workspace resize decision has one
Rust-owned implementation and remains covered at its boundary conditions.

Test Plan:
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo check --manifest-path rust/Cargo.toml --tests
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo clippy --manifest-path rust/cli/Cargo.toml --all-targets -- -D warnings
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 make -j1
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 make -j1 -C tests invalidDictionaries
- ulimit -v 41943040; make -j1 -C tests test
This commit is contained in:
ddidderr
2026-07-21 17:55:20 +02:00
parent 49a448602a
commit e3ce950f01
3 changed files with 114 additions and 23 deletions
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lib/compress/zstd_cwksp.h
-19
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@@ -743,23 +743,4 @@ MEM_STATIC int ZSTD_cwksp_check_available(ZSTD_cwksp* ws, size_t additionalNeede
return ZSTD_cwksp_available_space(ws) >= additionalNeededSpace;
}
MEM_STATIC int ZSTD_cwksp_check_too_large(ZSTD_cwksp* ws, size_t additionalNeededSpace) {
return ZSTD_cwksp_check_available(
ws, additionalNeededSpace * ZSTD_WORKSPACETOOLARGE_FACTOR);
}
MEM_STATIC int ZSTD_cwksp_check_wasteful(ZSTD_cwksp* ws, size_t additionalNeededSpace) {
return ZSTD_cwksp_check_too_large(ws, additionalNeededSpace)
&& ws->workspaceOversizedDuration > ZSTD_WORKSPACETOOLARGE_MAXDURATION;
}
MEM_STATIC void ZSTD_cwksp_bump_oversized_duration(
ZSTD_cwksp* ws, size_t additionalNeededSpace) {
if (ZSTD_cwksp_check_too_large(ws, additionalNeededSpace)) {
ws->workspaceOversizedDuration++;
} else {
ws->workspaceOversizedDuration = 0;
}
}
#endif /* ZSTD_CWKSP_H */