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Re: [Xen-devel] Scheduler problem in XEN 3.4.0

  • To: Pankaj Parakh <me.pankajparakh@xxxxxxxxx>
  • From: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
  • Date: Tue, 13 Oct 2009 12:47:03 +0100
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 13 Oct 2009 04:47:30 -0700
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I haven't used the round-robin scheduler code in that book, but
another guy named Ananth tried to use it unsuccessfully as well.  You
can see some of that thread here (not sure why I can't find the
original post):

Most of us are not so interested in finding the bug in the books'
code, but we are interested in helping *you* find it.  If you continue
to do hypervisor work (and especially if you do anything with the
scheduler), you're going to have to learn how to debug a hypervisor,
which is often rather a pain in the neck.

There is some advice in the thread linked to above about setting up a
serial console.  You can add printk()'s around to find out what the
sched_rr code is doing and where it's going wrong, and ask more
questions on the list if you get stuck.  (Feel free to cc me to bring
it to my attention, but always send it to the whole list.)

Good luck,

On Mon, Oct 12, 2009 at 6:15 PM, Pankaj Parakh
<me.pankajparakh@xxxxxxxxx> wrote:
> Hi All,
> I am trying to learn about schedulers of XEN, so for a start I am
> using XEN 3.4.0 and using book - The Definitive Guide to the Xen
> Hypervisor - by David Chisnall, I have followed its steps to add
> scheduler which is there in Chap. 12
> But I dont know what is the problem, I am unable to boot with that
> scheduler selected, I have been trying to debug this problem, but
> kinda stuck in it.
> The scheduler given in that book is a trivial round robin scheduler.
> Is the problem is with the code or with the procedure, I dont know that also.
> Plzz help me out of this.
> Thanks
> Pankaj Parakh
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

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