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Feature #15698

open

bhyve should expose RDTSCP

Added by Patrick Mooney 10 days ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
bhyve
Start date:
Due date:
% Done:

0%

Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:
External Bug:

Description

The kernel vmm portion of bhyve should grow support for exposing RDTSCP/RDPID to the guest, along with the appropriate machinery for saving/restoring MSR_TSC_AUX on guest entry/exit. This would likely help guest performance, as rdtscp is often a preferred instruction for performing time calculations in userspace.

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