Re: [Xen-users] Xen Performance

[Fasiha Ashraf <feehapk@xxxxxxxxxxx>]

Hi,
I am facing the same probe in DomU<->DomU throughput via netper, and following this thread. after doing everything suggested now using iperf with iptables flushed on both DomUs and Dom0 I got these results in a simple an a bidirectional run.
[root@F11-G6S2 ~]# iperf -c 10.11.21.215 -t 120
------------------------------------------------------------
Client connecting to 10.11.21.215, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 10.11.21.216 port 58883 connected with 10.11.21.215 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-120.5 sec  4.14 MBytes    288 Kbits/sec
[root@F11-G5S2 ~]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  5] local 10.11.21.215 port 5001 connected with 10.11.21.216 port 58883
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-120.7 sec  4.14 MBytes    288 Kbits/sec
[root@F11-G6S2 ~]# iperf -c 10.11.21.215 -t 120 -r
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 10.11.21.215, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  5] local 10.11.21.216 port 49735 connected with 10.11.21.215 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-120.5 sec  4.14 MBytes    288 Kbits/sec
[  4] local 10.11.21.215 port 5001 connected with 10.11.21.216 port 49735
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-120.7 sec  4.14 MBytes    288 Kbits/sec
------------------------------------------------------------
Client connecting to 10.11.21.216, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  4] local 10.11.21.215 port 33522 connected with 10.11.21.216 port 5001
write2 failed: Broken pipe
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0- 0.0 sec  15.6 KBytes  99.0 Mbits/sec

the following 2 are CONFIG_NO_HZ=y, CONFIG_HIGH_RES_TIMERS=y configured.

Also my clock source is XEN.

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