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Improve the precision of bhyve's vPIT.

Description

Improve the precision of bhyve's vPIT.

Use 'struct bintime' instead of 'sbintime_t' to manage times in vPIT
to postpone rounding to final results rather than intermediate
results. In tests performed by Joyent, this reduced the error measured
by Linux guests by 59 ppm.

Smart OS bug: https://smartos.org/bugview/OS-6923
Submitted by: Patrick Mooney
Reviewed by: rgrimes
Obtained from: SmartOS / Joyent
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20335

Details

Committed
jhbJul 20 2019, 3:59 PM
Reviewer
rgrimes
Differential Revision
D20335: bhyve could be more precise with vPIT
Parents
rS350177: Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
Branches
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Tags
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