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[Xen-devel] xen networking issue
- To: Pasi Kärkkäinen <pasik@xxxxxx>, "Fajar A." <fajar@xxxxxxxxx>
- From: Fasiha Ashraf <feehapk@xxxxxxxxxxx>
- Date: Thu, 19 Nov 2009 15:48:52 +0530 (IST)
- Cc: Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 19 Nov 2009 02:19:16 -0800
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sorry forgot to change the subject of this email.
Hi all
I am using xen-3.4.1 with PV OS kernel 2.6.31.4 in FC11. When ever I try using a guest as web server to fetch its data from different nodes I dont experience enough speed even using 1G link on both sides. After running different bench marks I have come to know that while using guest as a sender on 1G link throughput goes down.
#wget http://10.11.21.113/VTS_04_1.VOB
--2009-11-19 15:17:17-- http://10.11.21.113/VTS_04_1.VOB
Connecting to 10.11.21.113:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1073739776 (1024M) [text/plain]
Saving to: `VTS_04_1.VOB'
0%
[ ] 432,670 14.7K/s eta 13h 51m ^C
here are some results i have collected using iperf.
Guest sending data to an external system
[root@fasiha fasiha]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 10.11.20.223 port 5001 connected with 10.11.21.113 port 50284
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-31.8
sec 952 KBytes 245 Kbits/sec
[root@F11-G3S1 ~]# iperf -c 10.11.20.223 -t 30
------------------------------------------------------------
Client connecting to 10.11.20.223, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.11.21.113 port 50284 connected with 10.11.20.223 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-30.2 sec 952 KBytes 259 Kbits/sec
Guest receiving data from external system
[root@F11-G3S1 ~]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte
(default)
------------------------------------------------------------
[ 4] local 10.11.21.113 port 5001 connected with 10.11.20.223 port 40423
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-30.0 sec 3.27 GBytes 937 Mbits/sec
[root@fasiha fasiha]# iperf -c 10.11.21.113 -t 30
------------------------------------------------------------
Client connecting to 10.11.21.113, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.11.20.223 port 40423 connected with 10.11.21.113 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-30.0 sec 3.27 GBytes 937 Mbits/sec
It should be the same or comparable in both cases. What could be the
reason?
Regards,
Fasiha Ashraf
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