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unmap延时刷新tlb,提升系统性能 #221

@uestc-gr

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@uestc-gr

rv参考arm架构的提交43b3dfdd0455("arm64: support batched/deferred tlb shootdown during page reclamation/migration")
在多线程场景下,允许unmap时延迟刷新TLB,这有助于减少IPI数量和sfence.vma指令的执行次数。在测试中显示所有平台均获得显著性能提升:

Unmatched平台:约34%
TH1520平台:约78%
Qemu模拟器:约81%

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