linux-kernel - Re: [RFC] virtio: use mandatory barriers for remote processor vdevs

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Message-ID: <20111129151958.GA31789@redhat.com>
Date:	Tue, 29 Nov 2011 17:19:59 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Ohad Ben-Cohen <ohad@...ery.com>
Cc:	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [RFC] virtio: use mandatory barriers for remote processor vdevs

On Tue, Nov 29, 2011 at 03:57:19PM +0200, Ohad Ben-Cohen wrote:
> > Is an extra branch faster or slower than reverting d57ed95?
> 
> Sorry, unfortunately I have no way to measure this, as I don't have
> any virtualization/x86 setup. I'm developing on ARM SoCs, where
> virtualization hardware is coming, but not here yet.

You can try using the micro-benchmark in tools/virtio/.
That does not need virtualization.

-- 
MST
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