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time: add alternative timer for better multicore scalability (#7467)

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This change introduces per-worker timer wheels in the time subsystem
to reduce the lock contention.

Key changes:
- Each worker now maintains a local timer wheel.
- Timer insertions are performed locally.
- Timer cancellations are forwarded via a
  dedicated cross-worker cancellation queue.

Relevant RFC: https://github.com/tokio-rs/tokio/issues/7384

---------

Signed-off-by: ADD-SP <[email protected]>
This commit is contained in:
Qi
2025-11-27 09:29:28 +08:00
committed by GitHub
parent 749322d351
commit 73d733a341
34 changed files with 2791 additions and 102 deletions
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.github/workflows/ci.yml
+1
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@@ -1058,6 +1058,7 @@ jobs:
CARGO_TARGET_WASM32_WASIP1_RUNNER: "wasmtime run --"
CARGO_TARGET_WASM32_WASIP1_THREADS_RUNNER: "wasmtime run -W bulk-memory=y -W threads=y -S threads=y --"
RUSTFLAGS: --cfg tokio_unstable -Dwarnings -C target-feature=+atomics,+bulk-memory -C link-args=--max-memory=67108864
RUSTDOCFLAGS: -C link-args=--max-memory=67108864
- name: WASI test tokio-stream
run: cargo test -p tokio-stream --target ${{ matrix.target }} --features time,net,io-util,sync
.github/workflows/loom.yml
+1 -1
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@@ -52,7 +52,7 @@ jobs:
toolchain: ${{ env.rust_stable }}
- uses: Swatinem/rust-cache@v2
- name: run tests
run: cargo test --lib --release --features full -- --nocapture runtime::time::tests
run: cargo test --lib --release --features full -- --nocapture runtime::time
working-directory: tokio
loom-current-thread: