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Date:      Thu, 18 Jun 2020 17:52:51 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 241958] Enable option TCPHPTS in the kernel causes a large % of interruptions if there is no HPET eventtimer in the system
Message-ID:  <bug-241958-7501-dXmBbiMucI@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-241958-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-241958-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241958

Tom Jones <thj@FreeBSD.org> changed:

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

--- Comment #5 from Tom Jones <thj@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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