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by imtringued
137 days ago
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How can you guarantee that the OS doesn't preempt your thread in the middle of the spinlock? Suddenly your 100 cycle spinlock turns into millions or billions of wasted cycles, because the other threads that are trying to acquire the same lock are spinning and didn't bother informing the OS scheduler that they need the thread that is holding the spinlock, which also didn't inform the OS, to finish its business ASAP. |
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