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%. 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? Kind regards, Rik _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Could you specify what version of the GPL PV drivers you''re using, and what Windows 2003 service pack you have installed? -Nick -----Original Message----- From: Rik v. A <rikratva@gmail.com> To: xen-users@lists.xensource.com Subject: [Xen-users] Win2k3 GPLPV Network issue (2) Date: Tue, 6 Jan 2009 15:43:57 +0100 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%. 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? Kind regards, Rik This e-mail may contain confidential and privileged material for the sole use of the intended recipient. If this email is not intended for you, or you are not responsible for the delivery of this message to the intended recipient, please note that this message may contain SEAKR Engineering (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly prohibited from downloading, photocopying, distributing or otherwise using this message, its contents or attachments in any way. If you have received this message in error, please notify us immediately by replying to this e-mail and delete the message from your mailbox. Information contained in this message that does not relate to the business of SEAKR is neither endorsed by nor attributable to SEAKR. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Nick, I am using the latest drivers: 0.9.12-pre13. Service Pack 2 is installed. Kind regards, Rik 2009/1/6 Nick Couchman <Nick.Couchman@seakr.com>:> Could you specify what version of the GPL PV drivers you''re using, and what > Windows 2003 service pack you have installed? > > -Nick > > > -----Original Message----- > From: Rik v. A <rikratva@gmail.com> > To: xen-users@lists.xensource.com > Subject: [Xen-users] Win2k3 GPLPV Network issue (2) > Date: Tue, 6 Jan 2009 15:43:57 +0100 > > 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%. > > 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? > > Kind regards, > Rik > > > ________________________________ > This e-mail may contain confidential and privileged material for the sole > use of the intended recipient. If this email is not intended for you, or you > are not responsible for the delivery of this message to the intended > recipient, please note that this message may contain SEAKR Engineering > (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly > prohibited from downloading, photocopying, distributing or otherwise using > this message, its contents or attachments in any way. If you have received > this message in error, please notify us immediately by replying to this > e-mail and delete the message from your mailbox. Information contained in > this message that does not relate to the business of SEAKR is neither > endorsed by nor attributable to SEAKR._______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > Could you specify what version of the GPL PV drivers you''re using, and > what Windows 2003 service pack you have installed? >And the version of Xen too. James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > 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@lists.xensource.com http://lists.xensource.com/xen-users
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@bendigoit.com.au>:>> >> 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@lists.xensource.com http://lists.xensource.com/xen-users