On Tue, Mar 02, 2010 at 07:50:59PM -0500, Mike Viau wrote:
> >Any just first argument dummy=dummy should on kenel line.
> > Read Wiki one more time. It works.
>
> I believe you that it does work. I was able to see (XEN) messages coming from
> the hypervisor, but no matter how I changed the option I kept getting a
> kernel fault.
>
> I feel like it was time to stop mucking around with getting Ubuntu and the
> grub2 boot loader to work with XEN so I decided to install a headless
> OpenSUSE 11.2 system.
>
> The openSUSE distribution supported Xen 3.4.1 tools, and had a 2.6.31.12
> xenified kernel. On this setup I experience identical network performance.
>
> ~1MB/s - w/ xen kernel
> ~4.5 MB/s - w/ non-xen kernel
>
> I use the e1000e kernel module driver for my Ethernet card.
>
> Is this typical Dom0 (or Xen Host) network performance with a xenified kernel
> or is just in my two setups that one encounters such a network performance
> hit to the Dom0?
>
No, it's not typical.
How are you measuring the performance? In a gigabit network you should be able
to push around 110 MB/sec.. 4.5 MB/sec sounds really slow.
-- Pasi
> -M
>
> --- On Mon, 3/1/10, Mike Viau <viaum@xxxxxxxxxxxxxxx> wrote:
>
> From: Mike Viau <viaum@xxxxxxxxxxxxxxx>
> Subject: RE: [Xen-devel] RE: [Xen-users] How to: Improve Network Throughput
> of a XEN kernel?
> To: bderzhavets@xxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Monday, March 1, 2010, 2:52 PM
>
> Why using grub2 vs grub is baffling am not sure....
>
> I think I'd prefer to use the kernel command line in grub2 so that the
> options may be changed easier laster on. However I still have been having so
> success with boot
> XEN with Ubuntu's grub2 boot loader.
>
> Am I correct to conclude CONFIG_CMDLINE_BOL must = N to allow GRUB2 to pass
> kernel options?
> [1]http://cateee.net/lkddb/web-lkddb/CMDLINE_BOOL.html
>
> I have read through the Wiki page at
> [2]http://wiki.xensource.com/xenwiki/XenCommonProblems. I am running a 64-bit
> Xen Hypervisor.
>
> Thus far I have been having no success with using the example entry found
> at
> [3]http://old.nabble.com/Strange-interaction-from-grub2-and-XEN-td26464067.html
>
> A question regarding that entry is what would be the root device when there
> are separate /boot and root partitions? I am using the partition with the
> /boot (grub2) as
> my 'set root' device right?
>
> I am also using the dummy=dummy as the first option on the first module
> line, again as discovered on the wiki.
>
> Additionally posted on another thread here in the Xen mailing list was:
>
> > On 1 March 2010 08:09, Luke Carrier <luke.carrier@xxxxxxxxx> wrote:
> >>
> >> Not sure about Debian, but I know Ubuntu isn*t ideal for Xen any more
> >> because of the presence of GRUB2 * the new boot loader doesn*t support
> >> passing certain command lines and the current multiboot implementation
> >> breaks the method Xen uses to load the
> Dom0 kernel * you can*t use Ubuntu
> >> 9.10 Server with Xen.
>
> I am confused now because Boris clearly created a wordpress.com weblog in
> where Ubuntu 9.10 Server was
> used with XEN.
>
> Lastly, out of curiosity, what (or what kind) of commands cannot be passed
> with GRUB2?
>
> ThX!
>
>
> -M
>
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Date: Sat, 27 Feb 2010 11:20:31 -0800
> From: bderzhavets@xxxxxxxxx
> Subject: Re: [Xen-devel] RE: [Xen-users] How to: Improve Network Throughput
> of a XEN kernel?
> To: mike.viau@xxxxxxxxxxxxxxx
> CC: xen-devel@xxxxxxxxxxxxxxxxxxx; xen-users@xxxxxxxxxxxxxxxxxxx
>
> In Xen Wiki is mentioned , that parameters for kernel may be set via
> command line as follows:-
>
> ************************************************************************************************************
> module (hd1,10)/vmlinuz-2.6.31.8 dummy=dummy root=/dev/sda7 ro
> console=tty0
>
> ************************************************************************************************************
> # cat /proc/cmdline
>
> shows that GRUB2 skips first argument, what causes problem.
>
> Compiling built-in CMD_LINE is just an option.
> Read all Wiki written by Pasi and you would never be surprised ;)
>
> > P.S: What is your feeling on using a recent Ubuntu system with
> > grub-legacy as the boot loader? I noticed that Squeeze has adopted grub2
> > package as well too...
>
> I have development Xen 3.4.3 instance on top Ubuntu 9.10 Server with GRUB2
> ( baremetall) loading any from 3 mentioned bellow kernels under Xen 3.4.3
>
> 1.) 2.6.32.9 PVOPS
> 2.) 2.6.31.6 PVOPS
> 3.) 2.6.31.12 xenified
>
> with no problems with dummy=dummy as first parameter ( thanks Pasi).
> It may also may be done via compiling kernels with built-in CMD_LINE.
> It works fine as well.
>
> Boris.
>
> --- On Sat, 2/27/10, Mike Viau <viaum@xxxxxxxxxxxxxxx> wrote:
>
> From: Mike Viau <viaum@xxxxxxxxxxxxxxx>
> Subject: [Xen-devel] RE: [Xen-users] How to: Improve Network Throughput
> of a XEN kernel?
> To: bderzhavets@xxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Saturday, February 27, 2010, 12:03 PM
>
> Yes, thank you Boris for pointing that out. I found that was defiantly
> true. The 3.2.1 xen hypervisor could only boot the 2.6.26-2 xen kernel and
> the xenified
> 2.6.31.12.
>
> Additionally I found that:
>
> Xend does not start when using pv_ops dom0 kernel?
>
> In December 2009 pv_ops dom0 kernel modules were renamed to have a "xen-"
> prefix in them, ie. "evtchn.ko" became "xen-evtchn.ko".
>
> This makes Xen 3.4.x xend fail to start, because it tried to load
> "evtchn.ko", but that doesn't exist. You need to load "xen-evtchn.ko" and
> then start xend. Fedora 12
> xen-3.4.2-2 rpms have this problem fixed.
>
> Also make sure you have xenfs mounted to "/proc/xen", that's needed
> aswell.
>
> [Source: [4]http://wiki.xensource.com/xenwiki/XenParavirtOps]
>
> And it appears the Debian xen-3.4.2-2 debs (in squeeze) have not fixed
> this problem.
>
> Lastly I am still doing some reading on the grub2 package and how to
> configure it. It turns out that I have been using grub-legacy (or just good
> old grub) for so long
> that configuring the grub2 boot loader is turning out to be my own
> personal kryptonite.
>
>
>
> I am still working on getting the hypervisor to load the dom0 kernel in a
> Ubuntu system.
>
>
>
> I have noticed an example in your wordpress @ [5]Set up Xen 3.4.3-rc2 &
> Libvirt 0.7.0 Dom0 (with 2.6.31.8 xenified aka Suse kernel) on top of Ubuntu
> 9.10 Server
>
>
>
> With CONFIG_CMDLINE="root=/dev/sdb11 ro console=tty0"
>
>
>
> menuentry "Xen 3.4 / Ubuntu 9.10 kernel 2.6.31.8 xenified" {
> insmod ext2
> set root=(hd1,10)
> multiboot (hd1,10)/xen-3.4.gz
> module (hd1,10)/vmlinuz-2.6.31.8
> module (hd1,10)/initrd-2.6.31.8.img
> }
>
>
>
> I am sure you wouldn't of mentioned the CONFIG_CMDLINE kernel option is
> it was not important for using with grub2 right? I have not have to compile a
> kernel with the
> command line previous as I was just able to supply the arguments on the
> kernel line of my menu.lst (grub configuration file).
>
> P.S: What is your feeling on using a recent Ubuntu system with
> grub-legacy as the boot loader? I noticed that Squeeze has adopted grub2
> package as well too...
>
>
> -M
>
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Date: Sat, 27 Feb 2010 04:32:59 -0800
> From: bderzhavets@xxxxxxxxx
> Subject: Re: FW: [Xen-users] How to: Improve Network Throughput of a XEN
> kernel?
> To: jbeulich@xxxxxxxxxx; mike.viau@xxxxxxxxxxxxxxx
> CC: xen-devel@xxxxxxxxxxxxxxxxxxx; xen-users@xxxxxxxxxxxxxxxxxxx
>
> You cannot load pvops kernel under xen-hypervisor 3.2.1 ( >=3.4.0 in
> general)
>
> Boris.
>
> --- On Fri, 2/26/10, Mike Viau <viaum@xxxxxxxxxxxxxxx> wrote:
>
> From: Mike Viau <viaum@xxxxxxxxxxxxxxx>
> Subject: FW: [Xen-users] How to: Improve Network Throughput of a XEN
> kernel?
> To: bderzhavets@xxxxxxxxx, jbeulich@xxxxxxxxxx
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
> Date: Friday, February 26, 2010, 3:19 PM
>
> Hello again,
>
> Just a quick update...
>
> I was really hoping it was just going to be an issue with the kernel
> .config, however I copied exact configuration from the working Debain
> 2.6.26-2-xen-amd64 kernel
> and used a make oldconfig but the end result was the same.
>
> After booting the xenified (2.6.31.12) or pvops kernel (2.6.31.6) via
> both xen-hypervisor 3.2.1 or xen-hypervisor 3.4.2 the maximum data transfer
> to/from the Dom0
> (Xen host) is ~1MB/s.
>
> Next I plan on re-trying my efforts on a Ubuntu system to see if same
> network bottlenecking is present.
>
>
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Date: Fri, 26 Feb 2010 09:16:59 -0800
> From: bderzhavets@xxxxxxxxx
> Subject: Re: [Xen-users] How to: Improve Network Throughput of a XEN
> kernel?
> To: xen-users@xxxxxxxxxxxxxxxxxxx; viaum@xxxxxxxxxxxxxxx
>
> Would escalate to xen-devel. 2.6.31.8 (12) aka Suse xenified was Jan
> Beulich stuff.
> He might have an answer.
> Boris.
>
> --- On Fri, 2/26/10, Mike Viau <viaum@xxxxxxxxxxxxxxx> wrote:
>
> From: Mike Viau <viaum@xxxxxxxxxxxxxxx>
> Subject: [Xen-users] How to: Improve Network Throughput of a XEN
> kernel?
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Cc: waldi@xxxxxxxxxx
> Date: Friday, February 26, 2010, 12:09 PM
>
> Hi there,
>
> I am starting a new thread to try and solve a problem I am having
> will slow network throughput to the XEN host (not to a domU).
>
> I have confirmed my problem occurs with PVOPS 'xen/master' kernel as
> well using
>
> [6]http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.31.6-pvops-dom0-xen-master-x86_64
> as the .config.
>
> It also occurs with a forward ported xenified kernel (2.6.31.12)
> using the attached config-11-xen (.config).
>
> However when using the xen kernel found in debain lenny (2.6.26-2)
> for the amd64 architecture I get similiar transfer rates to my Xen host as I
> do on a baremetel
> kernel.
>
> Bastian Blank perhaps you could point me in the right direction in
> regards to a debian specific customization or patch I should be aware of?
> Maxium transfer rate (to/from hard disk) using the PVOPS 'xen/master'
> kernel and forward ported xenified kernel (2.6.31.12) is bottlenecking at
> ~1MB/s. On the
> debain lenny xen kernel I am getting ~4.5MB/s.
>
> I was hoping one could suggest options in the .config that might be
> modified in order to improve network throughput of a XEN kernel and therefor
> increase the data
> transfer rates over the netowork to and from the Xen host.
>
> Thanks alot for any help! As always I will be willing to accept any
> suggestions :)
>
> -M
>
>
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> References
>
> Visible links
> 1. http://cateee.net/lkddb/web-lkddb/CMDLINE_BOOL.html
> 2. http://wiki.xensource.com/xenwiki/XenCommonProblems
> 3.
> http://old.nabble.com/Strange-interaction-from-grub2-and-XEN-td26464067.html
> 4. http://wiki.xensource.com/xenwiki/XenParavirtOps
> 5. Permanent Link: Set up Xen 3.4.3-rc2 & Libvirt 0.7.0 Dom0 (with
> 2.6.31.8 xenified aka Suse kernel) on top of Ubuntu 9.10Server
>
> http://bderzhavets.wordpress.com/2010/01/04/set-up-xen-3-4-3-rc1-libvirt-0-7-0-dom0-with-2-6-31-8-xenified-aka-suse-kernel-on-top-of-ubuntu-9-10-server/
> 6.
> http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.31.6-pvops-dom0-xen-master-x86_64
> 7. http://go.microsoft.com/?linkid=9708120
> 8. http://go.microsoft.com/?linkid=9708117
> 9. http://mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
> 10. http://lists.xensource.com/xen-devel
> 11. http://go.microsoft.com/?linkid=9708118
> 12. http://mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
> 13. http://lists.xensource.com/xen-users
> 14. http://go.microsoft.com/?linkid=9712960
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