RE: [Xen-devel] Vif rate limiting

["Padala, Pradeep" <pradeep.padala@xxxxxx>]

> > This is the config line I am using.
> > 
> > vif = ['ip=15.25.117.44', 'rate=10MB/s']
> 
> This will rate-limit to 10 megabytes per second, not 10 
> megabits per second.
> Is this what you meant? Otherwise you should use 'rate=10Mb/s'.

Yes, I meant 10Mbytes/sec, since we have 1gbit interfaces. I have an
apache server serving a 1G file, and I download the file from another
machine, that is on the same enclosure. So, the network is very fast.

I see an output like below. I posted a message earlier
(http://lists.xensource.com/archives/html/xen-devel/2007-03/msg00026.htm
l) describing similar problems with tc as well. I have tried this setup
in a separate set of machines connected with 1gbit interfaces with same
results. Any help is greatly apperciated.

[root@acts-03 ~]# wget --no-proxy http://15.25.117.44/data1G.dat
--08:23:43--  http://15.25.117.44/data1G.dat
           => `data1G.dat'
Connecting to 15.25.117.44:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1,073,741,824 (1.0G) [text/plain]

100%[===========================>] 1,073,741,824  112.12M/s    ETA 00:00

08:23:53 (107.39 MB/s) - `data1G.dat' saved [1073741824/1073741824] 

The full configuration of the VM is below. I am using routed networking.

kernel = '/boot/vmlinuz-2.6-xen'
vif = ['ip=15.25.117.44', 'rate=10MB/s']
ip = '15.25.117.44'
name = 'hperf1'
#extra = 'ramdisk_size=524288'
hostname = 'hperf1'
netmask = '255.255.255.0'
user = 'padalap'
memory=1000
disk = ['file:/root/xen/vm1_8g.img,sda1,w',
'file:/root/xen/vm1.swp,sda2,w']
root = '/dev/sda1 ro'
gateway = '15.25.117.42'
restart = 'never'

Pradeep

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