ChiaHungDuan ab17ecd107 [scudo] Add ConditionVariable in SizeClassAllocator64 (#69031) ...

This may improve the waiting of `Region->MMLock` while trying to refill
the freelist. Instead of always waiting on the completion of
`populateFreeListAndPopBatch()` or `releaseToOSMaybe()`, `pushBlocks()`
also refills the freelist. This increases the chance of earlier return
from `popBatches()`.

The support of condition variable hasn't been done for all platforms.
Therefore, add another `popBatchWithCV()` and it can be configured in
the allocator configuration by setting `Primary::UseConditionVariable`
and the desired `ConditionVariableT`.

Reviewed By: cferris

Differential Revision: https://reviews.llvm.org/D156146

2023-10-19 15:47:18 -07:00

1.5 KiB

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