[Bug 216759] [kern] Memory speed with small blocks (1K) up to 35 times slower than host system (under QEMU emulation, but not only)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216759

deJong <hellrider8881 at yahoo.com> changed:

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                 CC|                            |hellrider8881 at yahoo.com

--- Comment #15 from deJong <hellrider8881 at 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 this
issue.

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