Re: [PATCH 2/2] kvm tools: Add vhost-net support

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From: Sasha Levin <levinsasha928@gmail.com>
To: penberg@kernel.org
Cc: kvm@vger.kernel.org, mingo@elte.hu, asias.hejun@gmail.com,
	gorcunov@gmail.com, "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH 2/2] kvm tools: Add vhost-net support
Date: Wed, 16 Nov 2011 14:45:44 +0200	[thread overview]
Message-ID: <1321447544.3221.9.camel@lappy> (raw)
In-Reply-To: <1321446276-23952-2-git-send-email-levinsasha928@gmail.com>

On Wed, 2011-11-16 at 14:24 +0200, Sasha Levin wrote:
> This patch adds support to using the vhost-net device when using a tap backed
> virtio-net device.
> 
> Activating vhost-net is done by appending a 'vhost=1' flag to the net device
> configuration. For example:
> 
> 	'kvm run -n mode=tap,vhost=1'
> 
> Cc: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
> ---

I forgot to attach performance numbers to the changelog, so here they
are:

Short version
------------------

TCP Throughput: +29%
UDP Throughput: +10%
TCP Latency: -15%
UDP Latency: -12%

Long version
------------------

MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380  16384  16384    10.00    4895.04

MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Socket  Message  Elapsed      Messages                
Size    Size     Time         Okay Errors   Throughput
bytes   bytes    secs            #      #   10^6bits/sec

229376   65507   10.00      125287      0    6565.60
229376           10.00      106910           5602.57

MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate         
bytes  Bytes  bytes    bytes   secs.    per sec   

16384  87380  1        1       10.00    14811.55

MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate         
bytes  Bytes  bytes    bytes   secs.    per sec   

229376 229376 1        1       10.00    16000.44   
229376 229376

After:

MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380  16384  16384    10.00    6340.74

MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
192.168.33.4 (192.168.33.4) port 0 AF_INET
Socket  Message  Elapsed      Messages                
Size    Size     Time         Okay Errors   Throughput
bytes   bytes    secs            #      #   10^6bits/sec

229376   65507   10.00      131478      0    6890.09
229376           10.00      118136           6190.90

MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate         
bytes  Bytes  bytes    bytes   secs.    per sec   

16384  87380  1        1       10.00    17126.10

MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET
to 192.168.33.4 (192.168.33.4) port 0 AF_INET : first burst 0
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate         
bytes  Bytes  bytes    bytes   secs.    per sec   

229376 229376 1        1       10.00    17944.51

-- 

Sasha.

     prev parent reply	other threads:[~2011-11-16 12:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-16 12:24 [PATCH 1/2] kvm tools: Add optional callbacks for VQs Sasha Levin
2011-11-16 12:24 ` [PATCH 2/2] kvm tools: Add vhost-net support Sasha Levin
2011-11-16 12:45   ` Sasha Levin [this message]

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