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Date:      Mon, 20 Apr 2020 10:53:00 +0200
From:      Andrea Venturoli <ml@netfence.it>
To:        freebsd-virtualization@freebsd.org
Cc:        Michael Reifenberger <Michael@reifenberger.com>, Harry Schmalzbauer <freebsd@omnilan.de>
Subject:   Re: bhyve win-guest benchmark comparing
Message-ID:  <69553fba-4ee5-67dc-a052-b58bb8100061@netfence.it>
In-Reply-To: <20200419172345.Horde.alwm2Bn67wrcUt5a0zVjQ9f@app.eeeit.de>
References:  <9e7f4c01-6cd1-4045-1a5b-69c804b3881b@omnilan.de> <f5a78199-9306-bccc-606a-23c30f56b0f1@omnilan.de> <20200419172345.Horde.alwm2Bn67wrcUt5a0zVjQ9f@app.eeeit.de>

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On 2020-04-19 19:23, Michael Reifenberger wrote:
> Hi,
> r358848 has been MFC'd to stable/12

Hello.

Can I ask some questions about this?

First: this patch seems to apply cleanly to 12.1. Is it safe? At least 
worth testing?

Second.
IIUIC it's useless to test this on an AMD system, since the patch only 
involves Intel CPUs. Right?
Xeon are not affected, since they have vAPIC, so they should be already 
running as fast as possible. Correct?
The description says "APIC virtualization is a Xeon feature that is 
missing on most (all?) desktop CPUs". Is there a way to check? Should it 
be reported as a CPU feature at boot? With which string?

  bye & Thanks
	av.



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