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Date:      Wed, 15 Mar 2017 08:43:48 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-virtualization@FreeBSD.org
Subject:   [Bug 216759] [kern] Memory speed with small blocks (1K) up to 35 times slower than host system (under QEMU emulation, but not only)
Message-ID:  <bug-216759-27103-ApcBDlSodC@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-216759-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-216759-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759

deJong <hellrider8881@yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |hellrider8881@yahoo.com

--- Comment #15 from deJong <hellrider8881@yahoo.com> ---
I managed to find a patch which adds KVMCLOCK support, however it's pretty =
old
and I did not get around testing it.

I believe it has not been implemented in the -CURRENT branch yet.

Also, I read here:
http://markmail.org/message/pjtay3dghuqpv4hg

that using TSC-low is not entirely foolproof (whatever that may mean, I am =
more
of a sysadmin) so there are probably some issues with using it.

Mailing list:
https://lists.freebsd.org/pipermail/freebsd-arch/2015-January/016587.html

Patch:
https://reviews.freebsd.org/D1435#inline-51273

Maybe somebody could take a look at it and test it to see if it resolves th=
is
issue.

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