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Currently FreeBSD uses IPI based TLB flushing for remote TLB flushing. Hyper-V allows hypercalls to flush local and remote TLB. The use of Hyper-V hypercalls gives significant performance improvement in TLB operations. This patch set during test has shown near to 40 percent TLB performance improvement. Also this patch adds rep hypercall implementation as well. Reviewed by: whu, kib Tested by: whu Authored-by: Souradeep Chakrabarti <schakrabarti@microsoft.com> Co-Authored-by: Erni Sri Satya Vennela <ernis@microsoft.com> MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D45521 |
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