Slow bhyve guest (on certain CPUs) - Untangle TPR shadowing and APIC virtualization

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Slow bhyve guest (on certain CPUs) - Untangle TPR shadowing and APIC virtualization #934

Open mike-pt opened 4 years ago

mike-pt commented 4 years ago

Its seems bhyve can be extremely slow with certain CPU (i.e Xeon E3-1225 v3 or E3-1220 v6) but not others!

This seems to be do to Untangle TPR shadowing and APIC virtualization and as been fixed in FreeBSD a while ago https://github.com/freebsd/freebsd/commit/b7a1d0c3afe8801cc599c878e72adf0931ae7364

Any change we can port that over?