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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Win2k3 GPLPV Network issue (2)
The version of Xen is 3.3.1. Qemu and HVM are from this same source package. I just upgraded the drivers to the latest 0.9.12-pre13 version. I also just disabled checksum offloading and checksum checking on RX packets. It looks like that makes no difference. I run the iperf server as "iperf -u -s -i 1". Following is some output from the client. # iperf -u -c 192.168.0.4 ------------------------------------------------------------ Client connecting to 192.168.0.4, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 107 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.10 port 35602 connected with 192.168.0.4 port 5001 [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec [ 3] Sent 893 datagrams [ 3] Server Report: [ 3] 0.0-10.0 sec 1.22 MBytes 1.02 Mbits/sec 6.944 ms 24/ 893 (2.7%) # iperf -u -c 192.168.0.4 -b 100m ------------------------------------------------------------ Client connecting to 192.168.0.4, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 107 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.10 port 35602 connected with 192.168.0.4 port 5001 [ 3] 0.0-10.0 sec 120 MBytes 101 Mbits/sec [ 3] Sent 85471 datagrams [ 3] Server Report: [ 3] 0.0-10.0 sec 110 MBytes 92.2 Mbits/sec 0.142 ms 7103/85437 (8.3%) [ 3] 0.0-10.0 sec 1 datagrams received out-of-order # iperf -u -c 192.168.0.4 -b 1000m ------------------------------------------------------------ Client connecting to 192.168.0.4, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 107 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.10 port 35602 connected with 192.168.0.4 port 5001 [ 3] 0.0-10.0 sec 950 MBytes 797 Mbits/sec [ 3] Sent 677652 datagrams [ 3] Server Report: [ 3] 0.0-10.3 sec 615 MBytes 503 Mbits/sec 15.303 ms 238487/677396 (35%) 2009/1/6 James Harper <james.harper@xxxxxxxxxxxxxxxx>: >> >> Sorry for the previous unfinished E-mail. I managed to send it already >> using a weird Gmail key combination... >> >> Hi. I am running Windows 2003 Server with James' excellent GPLPV >> drivers. They significantly boosted the network throughput (I get >> around 600 Mbit using iperf). >> However, I am having some trouble with the ethernet. We are using an >> accounting application that uses Samba shares to store it's (database) >> data. It is very poorly written, and since I moved from a physical >> Win2k machine to a Xen-based Win2k3 machine, it keeps crashing. I >> thought that it was just due the poor quality of the software, but >> since I have started using Bacula for the backups, I suspect the >> network drivers. Bacula fails almost every backup job (Connection >> reset by peer) to the two Win2k3 machines running on the same Xen >> server. It has no problems backing up other (physical) machines. >> >> I tested the packet loss using Iperf UDP tests, and as soon as I >> increase the bandwidth, I get packet loss values up to 39%. > > Can you tell me the bandwidth figures you were testing with? > >> >> I also run a paravirtual Linux guest on this same Xen server that >> doesn't suffer from this packet loss. >> >> Is there something I can do? > > Try turning off checksum and large send offloading as a first thing to > try. > > James > _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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