Roger Lucas
2006-Aug-06 09:52 UTC
[Xen-users] How to automatically set sched-sedf parameters for a Dom-U
Hi, I am running Xen-3.0.2 on a standard Kubuntu Dapper Drake installation. All is Kubuntu from packages or the Xen binaries - nothing is recompiled from source. When I create a Dom-U, I get sched-sedf parameters that are different to the Dom-0 such as below: root@hydra:/etc/xen# xm sched-sedf Name ID Period(ms) Slice(ms) Lat(ms) Extra Weight Domain-0 0 20.0 15.0 0.0 1 0 harpseal 1 100.0 0.0 0.0 1 0 octopus 2 100.0 0.0 0.0 1 0 tarantula 3 100.0 0.0 0.0 1 0 root@hydra:/etc/xen# With these parameters, the Dom-Us seem to respond more slowly on their web servers, etc. If I change the sedf parameters to "-p 20 -s 15" on the Dom-Us to match the Dom-0, then the performance suddenly jumps up. My question is: How can I set these parameters automatically for a Dom-U ? I have looked through all the docs on the config files but there are no references there. I have also Googled for an answer but with no success. I have tried looking through the code, but Python isn''t a language that I am really familiar with (although it does seem relatively easy to read). Does anyone know how to set these parameters automatically ? Thanks, Roger _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Henning Sprang
2006-Aug-09 12:00 UTC
Re: [Xen-users] How to automatically set sched-sedf parameters for a Dom-U
On 8/6/06, Roger Lucas <roger@planbit.co.uk> wrote:> Hi, > > I am running Xen-3.0.2 on a standard Kubuntu Dapper Drake installation. All > is Kubuntu from packages or the Xen binaries - nothing is recompiled from > source.How can that be - as far as I know, there are absolutely NO xen binaries in the official (K)ubuntu Dapper archives. Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Roger Lucas
2006-Aug-09 12:16 UTC
RE: [Xen-users] How to automatically set sched-sedf parameters for a Dom-U
True, but there are binaries available directly from Xen and they just "drop in" to the Kubuntu Dapper Drake installation. What I meant was, I used the Kubuntu Dapper Drake binaries for all the Dom0 then installed the Xen 3.0.2-2 binaries from Xen. Sorry if I was unclear. Basically, I followed http://www.howtoforge.com/xen_3.0_ubuntu_dapper_drake but with the 3.0.2-2. That guide, by the way, is absolutely excellent and worked perfectly for me.> -----Original Message----- > From: henning.sprang@gmail.com [mailto:henning.sprang@gmail.com] On Behalf > Of Henning Sprang > Sent: 09 August 2006 13:00 > To: Roger Lucas > Cc: xen-users@lists.xensource.com > Subject: Re: [Xen-users] How to automatically set sched-sedf parameters > for a Dom-U > > On 8/6/06, Roger Lucas <roger@planbit.co.uk> wrote: > > Hi, > > > > I am running Xen-3.0.2 on a standard Kubuntu Dapper Drake installation. > All > > is Kubuntu from packages or the Xen binaries - nothing is recompiled > from > > source. > > How can that be - as far as I know, there are absolutely NO xen > binaries in the official (K)ubuntu Dapper archives. > > Henning_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users