similar to: correct procedure for reporting kernel problems?

I ran some iperf tests today and it looks like the etherbridge is the limiting factor on throughput. In the beforetime, I saw great throughput to the VMs; over 800 Mbps. With the bridge, the numbers are in the 400s somewhere. Is this the speed I can expect from the bridge? Is there some tuning I should try, or another way to get more bandwidth into the VMs? This is with xen-2.0, 2.4.27-xen0

Hi list, I've recently managed to install CentOS 4.4 on an Apple Mac Pro. Functionality-wise everything works great, but when trying to benchmark the system, I don't get stable runtimes, they differ by more than 30%. For example a benchmark run with our PDE solving code takes between 500 and 800 s on the completely unloaded machine. Suspicious kernel output (complete output attached):

Package: xen-hypervisor-3.0.3-1-amd64 Version: 3.0.3-0-2 Severity: important On a machine with 2 dual-core Opterons and 16GB of memory, only about 3GB is detected by the hypervisor. Transcript: root at thismachine:~# xm dmesg Xen version 3.0.3-1 (Debian 3.0.3-0-2) (ultrotter at debian.org) (gcc version 4.1.2 20061028 (prerelease) (Debian 4.1.1-19)) Fri Nov 3 00:21:27 CET 2006 Latest

when I run dmesg PE2950 Dell Server I see the following line Linux version 2.6.18-92.1.6.el5 (mockbuild at builder15.centos.org) (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Wed J un 25 13:45:47 EDT 2008 Command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) BIOS-e820: 0000000000100000 -

Hello, I have an odd problem on a dual processor, dual core Opteron system. Obviosously it is x86_64 so should have no problem with large amounts of RAM. The system has 4 GB installed (2GB on each processor). If I boot the system with a fresh install of Debian Etch it sees all the memory fine. dmesg reports: Memory: 4107008k/5242880k available (1929k kernel code, 86836k reserved, 864k data, 176k

I am trying to get QNX working with Xen. I''ve going about it in a similar way as installing windows with Xen, but when I start the guest up to install the OS it hangs on the line: ''Hit Esc for .altboot.......'' If anyone has managed to get this working, or has any ideas/advice for me here it would be greatly appreciated! Bryan

Hi, we are currently working on getting windows working on your xen servers. but we are facing a severe problem where dom0 and all domus hang for 1-5 seconds from time to time. we think it is probably because of disk i/o, because top sometimes says 100% wa (waiting on io) during the hang. dom0 has cpu 0 for exclusive use and the windows vms use cpu 1 to 7. should we give dom0 more than once

Hello, I originally posted this to xen-users, but someone suggested I post it here. I am having ACPI problems on a PenguinComputing Altus1600 system. It has 2x dual core Opteron 2210 processors. The system boots with a standard Debian or Ubuntu SMP kernel, with ACPI enabled. However the xen live cd, binary xen install, as well as my own custom compile of xen 3.0.4 from source will not boot.

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi list, I have an IBM xseries 345, running CentOS 5.3, hosting a few Xen domUs. However, I need more RAM -- but cannot remember if all (four) RAM sockets are populated (which would mean to buy higher capacity modules) or if there are two slots left to use. However, I'd like (and think that it's possible, but don't remember how) to

I'm running CentOS 5.1 with all updates, and the xen kernel. For some reason the OS is not seeing the full amount of ram. #uname -a Linux CentOS-VM-A 2.6.18-53.1.21.el5xen #1 SMP Tue May 20 10:03:27 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux # free total used free shared buffers cached Mem: 6104064 3445136 2658928 0 1412236

Hi, I''m trying to use a kickstart file to install VMs on a Scientific Linux 5.2 (repackaged RHEL52) host, but the install process seems to ignore my kickstart file. The command I''m using is: virt-install -n sl4vm01 --ram=1024 --vcpus=1 --os-type=linux --os-variant=rhel4 --extra-args="ks=http://particle.phys.uvic.ca/~fransham/ks.cfg" --paravirt --nographics

It seems that VCPU system time isn''t monotonic (using 3.0.4). It seems it might be correlated to when a VCPU is switched across real CPUs but I haven''t conclusively proved that. But e.g.: { old = { time = { version = 0x4ec pad0 = 0xe8e0 tsc_timestamp = 0x22cc8398b7194 system_time =

I'm recording TCP network throughput performance between Dom0 IP stack and all my guest domains (currently 6 running simultaneously). All guests are running simultaneously, but I only ever transmit between Dom0 and one of the DomUs while the other five are idle. When running a netperf TCP_STREAM test (netperf on Dom0, netserver on DomU) I record the following performance numbers, CPU % as

Hi there I get the following error message when i try to "xm create <domid>" Error: Error creating domain: (22, ''Invalid argument'') I have included everything i can think of Thanks The DomU config is kernel = "/boot/vmlinuz-2.6.12-xenU" ramdisk = "/boot/initrd-2.6.12.6-xenU.img" memory = 128 name = "xen01" nics=1 disk = [

Hi, I noticed the earlier thread on this started by Scott Koranda (sorry - was reading off gmane so I can''t reply to thread) I have exactly the same symptoms: machine hangs as soon as I attempt to start a single domU, just after emitting "using config file..." At that point the machine appears completely wedged. The sequence of 3 ^A on the console no longer does

Hello! I am encountering a problem with one of the machines I am using and the timer going backwards. It looks like the problem is due to to a bad PM-Timer entry being found. Though when debugging further, the real source of the problem stems from an ACPI table of type DSDT being parsed as an FADT during boot and certainly a bogus PM-Timer is found there. Here''s the output from

Hi, Thanks to everyone involved in the Xen project. I think it is great and can''t wait to get my hands dirty with it. In the meantime, I cannot boot Dom0 on an ibm x335 and I am not sure what the problem is. Any insights are welcome. Here is what my grub.conf file looks like: title Fedora Core (2.6.8-1.521) root (hd0,0) kernel /vmlinuz-2.6.8-1.521 ro root=/dev/sda9

Am considering a new laptop, and I wonder if anyone here can share their Xen experiences with the newest Core 2 Duo CPUs, ref http://www.intel.com/products/processor/core2duo/specifications.htm The list at http://wiki.xensource.com/xenwiki/HVM_Compatible_Processors doesn''t include any Core 2 Duos. Does that mean that people have had problems, or is the wiki just not up to date? I gather

Hi Trying to get WinXP HVM to install as domU on AMD. Got latest Xen Kernel and Xen package (NOT unstable or debug). When start, a window pops up for few seconds.. then it dies and another one comes up... and it disappears too. (Xen is trying to restart and giving up because the restart happens in 2 seconds..) It seems DomU is not able to read/understand something from Cirrus VGABIOS.

Hi Trying to get WinXP HVM to install as domU on AMD. Got latest Xen Kernel and Xen package (NOT unstable or debug). When start, a window pops up for few seconds.. then it dies and another one comes up... and it disappears too. (Xen is trying to restart and giving up because the restart happens in 2 seconds..) It seems DomU is not able to read/understand something from Cirrus VGABIOS.