[Bug 241958] Enable option TCPHPTS in the kernel causes a large % of interruptions if there is no HPET eventtimer in the system

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Thu Jun 18 17:52:52 UTC 2020


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241958

Tom Jones <thj at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |thj at FreeBSD.org

--- Comment #5 from Tom Jones <thj at FreeBSD.org> ---
I think I can reproduce this on 12-stable (r362275)

With options TCPHPTS, I see a consistent interrupt load on a bhyve vm on a 12.1
host.

CPU:  0.0% user,  0.0% nice,  0.0% system,  8.0% interrupt, 91.9% idle

Without TCPHPTS the vm is almost completely idle and there is no interrupt
load.

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