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Date:      Mon, 30 Nov 2020 13:22:45 -0800
From:      David Wolfskill <david@catwhisker.org>
To:        Konstantin Belousov <kostikbel@gmail.com>
Cc:        current@freebsd.org
Subject:   Re: Laptop exhibits erratic responsiveness
Message-ID:  <X8VipWX48JiWz0o1@albert.catwhisker.org>
In-Reply-To: <X8VeIXLiDR4q1mKl@kib.kiev.ua>
References:  <X8JVn/PIPuLzsWuQ@albert.catwhisker.org> <CADrOrms8fmf9asttPw%2B4B%2BKL7A4svAKx0dDHSuDnEVvxGWiX0Q@mail.gmail.com> <X8OsLaVToS1V1zoX@albert.catwhisker.org> <CAGudoHHevDxuvwLO2QMrMNfvG0vWSU=v9gHLbH0eMFDt8p0FWg@mail.gmail.com> <X8Tpg1P%2BXQc7iTNJ@albert.catwhisker.org> <CAGudoHEZvoj5s2bOz_atg9oPQM=24i5ydGZVebuLQAu0nbS0TA@mail.gmail.com> <X8Tx2LBXpRihqqfh@albert.catwhisker.org> <X8Var0P/N8TDLOMA@albert.catwhisker.org> <X8VeIXLiDR4q1mKl@kib.kiev.ua>

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On Mon, Nov 30, 2020 at 11:03:29PM +0200, Konstantin Belousov wrote:
> ...
> > I suppose I will be commenting out that DIAGNOSTIC option now.... :-}
>=20
> Try to just set debug.vmem_check to 0 and see if it helps.
> ...

OK; I rebooted the new(er) laptop with the previous kernel (that was
built with "option DIAGNOSTIC") and reproduced the issue:

--- albert.catwhisker.org ping statistics ---
37 packets transmitted, 37 packets received, 0.0% packet loss
round-trip min/avg/max/stddev =3D 0.451/13.832/178.867/41.904 ms

Then:

g1-216(13.0-C)[2] sudo sysctl debug.vmem_check
Password:
debug.vmem_check: 1
g1-216(13.0-C)[3] sudo sysctl debug.vmem_check=3D0
debug.vmem_check: 1 -> 0

On recheck:

--- albert.catwhisker.org ping statistics ---
60 packets transmitted, 60 packets received, 0.0% packet loss
round-trip min/avg/max/stddev =3D 0.411/0.551/1.051/0.084 ms

which looks pretty good to me.

Thank you, Konstantin! :-)

Peace,
david
--=20
David H. Wolfskill                              david@catwhisker.org
There's no point in asking Trump "Sir, have you no decency?" -- it is
already well established that neither he nor his enablers have any.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.

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