similar to: Very slow domU network performance

Hi, I have just started to work with Xen and have a question regarding the expected network throughput. Here is my configuration: Processor: 2.8 GHz Intel Celeron (Socket 775) Motherboard: Gigabyte 8I865GVMF-775 Memory: 1.5 GB Basic system: Kubuntu 6.06 Dapper Drake Xen version: 3.02 (Latest 3.0 stable download) I get the following iperf results: Src Dest Throughput Dom0 Dom0

Just reporting some iperf results. In each case, Dom0 is iperf server, DomU is iperf client: (1) Dom0: Intel Core2 3.16 GHz, CentOS 5.2, xen 3.0.3. DomU: Windows XP SP3, GPLPV 0.9.12-pre13, file based. Iperf: 1.17 Gbits/sec (2) Dom0: Intel Core2 2.33 GHz, CentOS 5.2, xen 3.0.3. DomU: Windows XP SP3, GPLPV 0.9.12-pre13, file based. Iperf: 725 Mbits/sec (3) Dom0: Intel Core2 2.33 GHz,

Hi guys, I''m running a freenas domU (FreeBSD 8.3 based, ZFS v28, 2 vcpus mapped to the same HT capable core) to serve storage for all purpose including other domUs running on the same host. I did some study to understand how well it works and the result is kind of confusing. In summary, the network performance between domains on the same host is worse than expected. And NFS service to

Hello, My first post on Xen-Users, so .. i''ve discovered a strange problem. Setup: -A Windows server 2003R2 (x86) with GPL PV driver 0.9.9 ipferf 1.7.0 (from 2003) -dom0 a opensuse 11.0 xen: # rpm -q -a |grep -i xen kqemu-kmp-xen-1.3.0pre11_2.6.25.5_1.1-7.1 kiwi-desc-xenboot-2.38-67.1 xen-3.2.1_16881_04-4.2 xen-tools-3.2.1_16881_04-4.2 xen-libs-3.2.1_16881_04-4.2

Hi all!. First of all sorry about my English it''s not very fluid. I have a small server based upon Supermicro X7DBN (Chipset Intel® 5000P) motherboard and Intel Xeon E5320 (1,83Ghz) with 4Gb of FB-DIMM RAM. The OS is Debian Lenny in dom0 (2.6.26-2-xen-amd64) and Debian Lenny in domU (2.6.26-2-xen-amd64). Xen is 3.4.2 compiled from sources. The problem comes when I need to passthrough

Hi Folks, I was wondering if anyone has an pointers/suggestions on how I might increase disk performance of a HVM zvol-backed DomU? - this is my first DomU, so hopefully its something obvious Running bonnie++ shows the DomU''s performance to be 3 orders of magnitude worse than Dom0''s, which itself is half as good as when not running xVM at all (see bottom for bonnie++ results)

I''ve just uploaded 0.9.11-pre7. save/restore should be working for 32 bits on both SMP and UP, and maybe for 64 bits although it''s not tested. If someone could test migration it would be much appreciated. The installer seems to not install the drivers under 64 bit environment... but they can then be installed manually. Not sure why at this point.

I''ve just uploaded 0.9.11-pre7. save/restore should be working for 32 bits on both SMP and UP, and maybe for 64 bits although it''s not tested. If someone could test migration it would be much appreciated. The installer seems to not install the drivers under 64 bit environment... but they can then be installed manually. Not sure why at this point.

Hello list, I have two differents installation Xen Hypervisor on two identical physical server, on the same switch : The problem is on my new server (Xen 4.0.1 with pvops kernel 2.6.32.24), I have bad performance on bandwidth I have test with a files copy and "iperf". Result iperf average: Transfert Bandwidth XEN-A -> Windows

I''ve just uploaded 0.9.11-pre12 of the GPL PV drivers for Windows. Since -pre10 (and -pre11) I''ve fixed a heap of crashes that were plaguing xennet under load, and also rewritten the interrupt/event distribution logic to improve performance. Under windows 2003 I can now get network speeds of 1-2Gbit/second TX and 600Gbit/second RX, which is considerably better than I was

I''ve just uploaded 0.9.11-pre12 of the GPL PV drivers for Windows. Since -pre10 (and -pre11) I''ve fixed a heap of crashes that were plaguing xennet under load, and also rewritten the interrupt/event distribution logic to improve performance. Under windows 2003 I can now get network speeds of 1-2Gbit/second TX and 600Gbit/second RX, which is considerably better than I was

Hi all, I have been having an issue for over a year with several Xen installations and have not been able to find out if this is just something I am missing. Basically I am trying to configure a firewall with two ethernet cards in a domU using pci passthrough. I am hiding the Ethernet cards at boot time via the pciback.hide kernel option. Right now I am running Xen 3.3.0 and the two Ethernet

I have a Dell server with four bonded, gigabit interfaces. Bonding mode is 802.3ad, xmit_hash_policy=layer3+4. When testing this setup with iperf, I never get more than a total of about 3Gbps throughput. Is there anything to tweak to get better throughput? Or am I running into other limits (e.g. was reading about tcp retransmit limits for mode 0). The iperf test was run with iperf -s on the

Hi, I am encountering a weird issue, where domU RX throughput (of traffic from another machine) is very low. But domU RX throughput from dom0 is fine, and dom0 RX from another machine is fine. iperf reported the following throughputs: dom0 <- outside -- 942Mbps domU <- dom0 -- 3467Mbps domU <- outside -- 87Mbps The NIC on the machine is 1GE. What puzzles me is, some instances of domU

Hi All, I am sure this has been answered somewhere in the list in the past, but I can''t find it. I was wondering if the linux guest netfront driver has GRO support in it. tcpdump shows packets coming in with 1500 bytes, although the eth0 in dom0 and the vif corresponding to the linux guest in dom0 is showing that they receive large packet: In dom0: eth0 Link encap:Ethernet HWaddr

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I''m trying to diagnose a reasonably large performance drop between two ostensibly similar servers; one running CentOS 5.5 on bare metal, the other running Fedora 14 as a Xen DomU under CentOS 5.5 (Xen 3.1.2-194.26.1.el5) I have a pair of older Dell PowerEdge 1750 servers, each with 4GB ram and 2x 2.4GHz Xeon CPU''s with

Hi all, I used netperf to measure throughput between dom0 & domU. The throughput between dom0 -> domU was 256.00 Mb/sec domU -> dom0 was 401.15 Mb/sec. The throughput between dom0 & domU seems to be very asymmetry. To my surprise the throughput between domU -> dom0 is more. The value which I specified are consistent values. Is

I''ve just pushed some changes to hg that seem to speed things up a bit for me. On one machine with 2 x dual core 2.4Ghz AMD cpu''s, testing with iperf from DomU to Dom0 I get: Windows (vcpus = 2) - ~500MBits/sec - ~66% cpu utilization (eg 100% on one, and 33% on the second cpu) Linux (vcpus = 1) - ~2200MBits/sec On another machine with 1 x dual core 1.8Ghz AMD cpu, testing as

I''m going to set up a PVM on xen-3.3.1 debian-amd64. I need advices about the best methods to install a fresh debian on it (i.e. how to choose the kernel for pvm) . I''ve installed xen from sources and only have one xen kernel in /boot which I''m using for dom0; should I use the same kernel for domUs? There is any problem on use vcpus=2; the other vm is an hvm running

Hi list, I''m using xen 3.0.0 and wonder how to obtain the 6 DOMU scheduling parameters from my DOM0 domain. Sort opposite of the sched-sedf xm sub-command Can someone help me ? Pierre _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users