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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] RE: [Xen-users] How to: Improve Network Throughput of a XEN kernel?
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 > > > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > Not using Hotmail on your phone? Why not? [7]Get it now. > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > Live connected with Hotmail on your phone. [8]Learn more. > -----Inline Attachment Follows----- > > _______________________________________________ > Xen-devel mailing list > [9]Xen-devel@xxxxxxxxxxxxxxxxxxx > [10]http://lists.xensource.com/xen-devel > > -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > All your Hotmail contacts on your phone. [11]Try it now. > -----Inline Attachment Follows----- > > _______________________________________________ > Xen-users mailing list > [12]Xen-users@xxxxxxxxxxxxxxxxxxx > [13]http://lists.xensource.com/xen-users > > -------------------------------------------------------------------------- > > IM on the go with Messenger on your phone. [14]Try now. > > 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 > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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