[Xen-users] DOMU to DOM0 performance issue

["Mereddy, Pramodh" <pramodhm@xxxxxxxxxx>]

I was using fedora core 8 with xen 3.0.3 with one guest running windows 2003 with paravirtual drivers.

Network performance was close to native performance when DOMU or DOM0 was talking to a different physical host.

DOMO to DOMU is around 160 MB/sec

DOMU to DOM0 is very bad. (In the order of 4 MB/sec)

 

I was using iperf tool to test the network performance.

 

Here are the details from ipconfig.

 

eth0      Link encap:Ethernet  HWaddr 00:30:48:94:DC:0A 

          inet addr:10.1.8.40  Bcast:10.1.8.255  Mask:255.255.255.0

          inet6 addr: fe80::230:48ff:fe94:dc0a/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:4611467 errors:0 dropped:0 overruns:0 frame:0

          TX packets:7621784 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2270818253 (2.1 GiB)  TX bytes:10060130376 (9.3 GiB)

 

eth1      Link encap:Ethernet  HWaddr 00:30:48:94:DC:0B 

          inet addr:10.2.8.40  Bcast:10.2.8.255  Mask:255.255.255.0

          inet6 addr: fe80::230:48ff:fe94:dc0b/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:1075344 errors:0 dropped:0 overruns:0 frame:0

          TX packets:2905460 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:225153662 (214.7 MiB)  TX bytes:3826103962 (3.5 GiB)

 

lo        Link encap:Local Loopback 

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:947641 errors:0 dropped:0 overruns:0 frame:0

          TX packets:947641 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2663428661 (2.4 GiB)  TX bytes:2663428661 (2.4 GiB)

 

peth0     Link encap:Ethernet  HWaddr 00:30:48:94:DC:0A 

          inet6 addr: fe80::230:48ff:fe94:dc0a/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:87419001 errors:0 dropped:0 overruns:0 frame:0

          TX packets:19409916 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:124258787958 (115.7 GiB)  TX bytes:7164086772 (6.6 GiB)

          Base address:0x2000 Memory:df220000-df240000

 

peth1     Link encap:Ethernet  HWaddr 00:30:48:94:DC:0B 

          inet6 addr: fe80::230:48ff:fe94:dc0b/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:64142215 errors:0 dropped:0 overruns:0 frame:0

          TX packets:18556458 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:89361796189 (83.2 GiB)  TX bytes:7428279336 (6.9 GiB)

          Base address:0x2020 Memory:df260000-df280000

 

tap0      Link encap:Ethernet  HWaddr 1E:D5:03:39:05:C7 

          inet6 addr: fe80::1cd5:3ff:fe39:5c7/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:62362 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:500

          RX bytes:0 (0.0 b)  TX bytes:10421676 (9.9 MiB)

 

tap1      Link encap:Ethernet  HWaddr CA:A7:06:85:F4:F0 

          inet6 addr: fe80::c8a7:6ff:fe85:f4f0/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:49324 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:500

          RX bytes:0 (0.0 b)  TX bytes:10122139 (9.6 MiB)

 

vif5.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 

          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:260816 errors:0 dropped:0 overruns:0 frame:0

          TX packets:244983 errors:0 dropped:19 overruns:0 carrier:0

          collisions:0 txqueuelen:32

          RX bytes:156234965 (148.9 MiB)  TX bytes:55178918 (52.6 MiB)

 

vif5.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 

          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:110244 errors:0 dropped:0 overruns:0 frame:0

          TX packets:208175 errors:0 dropped:251 overruns:0 carrier:0

          collisions:0 txqueuelen:32

          RX bytes:6974515 (6.6 MiB)  TX bytes:51410151 (49.0 MiB)

 

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00 

          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0

          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:33 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 b)  TX bytes:5177 (5.0 KiB)

 

 

 

Any ideas on what is wrong?

 

Thanks

Pramodh

 

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