From: Avi Kivity <avi@redhat.com>
To: Paul Brook <paul@codesourcery.com>
Cc: Dave Airlie <airlied@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] approaches to 3D virtualisation
Date: Tue, 15 Dec 2009 15:19:25 +0200 [thread overview]
Message-ID: <4B278CDD.1080907@redhat.com> (raw)
In-Reply-To: <200912141203.38494.paul@codesourcery.com>
On 12/14/2009 02:03 PM, Paul Brook wrote:
> [3] Obviously if you emulate lame hardware like ne2k or IDE then
> performance
> will suck. However emulation of a high-end NIC of SCSI HBA should get within
> spitting distance of virtio.
>
Practically the only difference performance-wise between virtio and
high-end controllers is that the ring index is located in a chip
register on real hardware, and in memory for virtio (plus hardware can
ask virtio not to notify).
Real hardware assumes guest->controller traffic is cheap, which isn't
true for virtio/kvm.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2009-12-15 13:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-12 1:58 [Qemu-devel] approaches to 3D virtualisation Dave Airlie
2009-12-12 2:00 ` [Qemu-devel] " Dave Airlie
2009-12-12 9:32 ` Dave Airlie
2009-12-12 12:08 ` Juan Quintela
2009-12-12 15:23 ` Anthony Liguori
2009-12-13 1:46 ` Dave Airlie
2009-12-12 15:30 ` Carl-Daniel Hailfinger
2009-12-13 2:13 ` [Qemu-devel] " Mark Williamson
2009-12-14 14:50 ` Stefano Stabellini
2009-12-14 12:03 ` Paul Brook
2009-12-15 13:19 ` Avi Kivity [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B278CDD.1080907@redhat.com \
--to=avi@redhat.com \
--cc=airlied@gmail.com \
--cc=paul@codesourcery.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.