Re: Welcome to the "Xen-devel" mailing list

Re: Welcome to the "Xen-devel" mailing list

[Peter Bier]

This is a try to post a follow-up to the thread "poor domU VBD performance" in the new newsgroup.
I do not know if this is th adequate way to do so, but I did not find any information on how to do 
so otherwise.

This is a response to "Ian Pratt":

Yes I do the performance testing using dd. It's only a simple "benchmark" but its results seem to indicate
a fundamental issue. I did the tests with the same partitions from DOM0 just as DomU. I used both disks 
and Dom0 achieved in all experiments 2.5 times the transfer rate of DomU. 

I do not know the chipset of my IDE controller on my computer at home, while I know that in the office it
pas a Promise raid controller ( I am neither at home nor in the office momentarily ) . I am sure, that the
system was idle during all test ( meaning that there was only the standard system running with no busy 
jobs and no user program consuming CPU or IO resources. 

I am very interested about Xen, but I need to fiy that problem. 
If there is any "checklist" how to  configure XEN efficiently, I might be able to fix the problem myself

Thanks 

    Peter Bier 
 

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Re: Re: Welcome to the "Xen-devel" mailing list

[James Bulpin]

On Mon, March 28, 2005 12:35 pm, Peter Bier said:
> This is a try to post a follow-up to the thread "poor domU VBD
> performance" in the new newsgroup.
> I do not know if this is th adequate way to do so, but I did not find any
> information on how to do
> so otherwise.

A suitable way to reply to a message that originated on the old list would
be to change the list address in the To: or Cc: field to
xen-devel@lists.xensource.com instead of the sourceforge.net address.

For replies via gmane, it should just work as we and gmane have updated
the relevant configuration. Please let me know if there are any problems
with this.

J.

Re: Welcome to the "Xen-devel" mailing list

[Steven]

I am a newbie to Xen and having some trouble in installing from xen source.
Could any one give some help on this?
I install Xen from source on a FC 8 machine. Following the instructions
in the README file, everything seems fine. However, the problem is
that I can not start xend after reboot. The error message is that

Traceback (most recent call last):
 File "/usr/sbin/xend", line 155, in <module>
   sys.exit(main())
 File "/usr/sbin/xend", line 132, in main
   start_blktapctrl()
 File "/usr/sbin/xend", line 116, in start_blktapctrl
   start_daemon("blktapctrl", "")
 File "/usr/sbin/xend", line 82, in start_daemon
   os.execvp(daemon, (daemon,) + args)
 File "/usr/lib/python2.5/os.py", line 354, in execvp
   _execvpe(file, args)
 File "/usr/lib/python2.5/os.py", line 392, in _execvpe
   func(fullname, *argrest)
OSError: [Errno 2] No such file or directory

I guess the problem is caused by the python os.py. However, on the
same machine, the xen kernel installed by yum install xen has no
problem with starting xend using the same command. Could anyone help
to solve those problems.
Thank you.