From: Asias He <asias.hejun@gmail.com>
To: Avi Kivity <avi@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Cyrill Gorcunov <gorcunov@gmail.com>,
kvm@vger.kernel.org
Subject: Re: [transparent networking] Re: [PATCH] kvm tools: Implement virtio network device
Date: Wed, 13 Apr 2011 21:39:33 +0800 [thread overview]
Message-ID: <4DA5A795.3010902@gmail.com> (raw)
In-Reply-To: <4DA5A633.8060104@redhat.com>
On 04/13/2011 09:33 PM, Avi Kivity wrote:
> On 04/13/2011 04:02 PM, Ingo Molnar wrote:
>> * Asias He<asias.hejun@gmail.com> wrote:
>>
>> > >> Here are some scp performance test for differenct implementations:
>> > >> None of rx and tx as thread:
>> > >> guest to host 3.2MB/s
>> > >> host to guest 3.1MB/s
>> > >>
>> > >> Only rx as thread:
>> > >> guest to host 14.7MB/s
>> > >> host to guest 33.4MB/s
>> > >>
>> > >> Both rx and tx as thread(This patch works this way):
>> > >> guest to host 19.8MB/s
>> > >> host to guest 32.5MB/s
>> > >>
>> > >> Signed-off-by: Asias He<asias.hejun@gmail.com>
>> > >
>> > > This is already in master. Thanks!
>> > >
>> >
>> > Ingo suggested to CC the updated version of this patch to kvm list.
>> So I
>> > am posting this patch again.
>>
>> Thanks Asias, cool stuff.
>>
>> Maybe other KVM developers want to chime in about how to best implement
>> transparent (non-TAP-using) guest-side networking.
>>
>> The best approach would be to not go down as low as the IP/Ethernet
>> packeting
>> level (it's unnecessary protocol overhead), but to implement some sort of
>> streaming, virtio based TCP connection proxying support.
>>
>> Strictly talking the guest does not need ICMP packets to have working
>> Internet
>> connectivity - only passing/tunneling through TCP sockets would be
>> enough. The
>> following highlevel ops are needed:
>>
>> - connect/shutdown/close
>> - send/receive
>> - poll
>>
>> And would be passed through to the host side and mirrored there into real
>> connect/shutdown TCP socket ops and into send/receive ops.
>>
>> The guest OS does not need to be 'aware' of this in any way, as long
>> as the
>> bzImage has this magic guest tunneling support included.
>>
>> Obviously, such a highlevel approach would be much faster as well than
>> any
>> packet level virtual networking approach.
>>
>> Does something like this exist upstream, or do we have to implement it?
>>
>
> macvtap does non-privileged setupless networking.
Great! Thanks Avi!
--
Best Regards,
Asias He
next prev parent reply other threads:[~2011-04-13 13:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-13 11:48 [PATCH] kvm tools: Implement virtio network device Asias He
2011-04-13 11:51 ` Pekka Enberg
2011-04-13 12:00 ` Asias He
2011-04-13 13:02 ` [transparent networking] " Ingo Molnar
2011-04-13 13:33 ` Avi Kivity
2011-04-13 13:38 ` Avi Kivity
2011-04-13 13:39 ` Asias He [this message]
2011-04-13 16:21 ` Stefan Hajnoczi
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