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Isolate the blocking-queue futexes on their own cache lines #109

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Merged
vadimskipin merged 1 commit into from
Jul 26, 2026
+6 −2
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Isolate the blocking-queue futexes on their own cache lines #109

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8 changes: 6 additions & 2 deletions include/silk/fibers/blocking-queue.h
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Original file line number Diff line number Diff line change
Expand Up @@ -113,8 +113,12 @@ class FiberBlockingQueue

private:
BoundedQueue<T> queue;
FiberFutex spaceAvailable;
FiberFutex itemAvailable;

/** Posted by dequeue, read by every enqueue; cache-line isolated from dequeuePos and itemAvailable. */
alignas(kCacheLineSize) FiberFutex spaceAvailable;

/** Posted by every enqueue, waited by dequeue; isolated so producer posts never invalidate the consumer's lines. */
alignas(kCacheLineSize) FiberFutex itemAvailable;
};

} // namespace silk