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Date:      Mon, 18 Jun 2018 11:06:34 +0200
From:      Harry Schmalzbauer <freebsd@omnilan.de>
To:        freebsd-virtualization@freebsd.org
Subject:   =?UTF-8?Q?kern.hz_=e2=80=93_Windows_aequivalent=2c_high_CPU_usage_o?= =?UTF-8?Q?n_bhyve_copmared_to_ESXi?=
Message-ID:  <818fd155-0203-868f-96fc-fe68ab13c495@omnilan.de>

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Hello,

has anybody found out if Windows does something similar as FreeBSD with 
kern.hz when running on a hypervisor?

I haven't done meaningful measuring, but on bhyve I see 2-digit CPU load 
with idle windows (2012R2) guest.
I never saw that on ESXi, it's much lower there, whil FreeBSD as guest 
on ESXi is even lower when idle.

Can somebody confirm this difference?
Is there a way to spoof hypervisor vendor string (from userland)? Resp. 
has anyone done that to see if windows behaviuor changes?

Thanks,

-harry




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