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Re: [Xen-devel] code read problems

To: tgh <wwwwww4187@xxxxxxxxxxx>
Subject: Re: [Xen-devel] code read problems
From: Daniel Stodden <stodden@xxxxxxxxxx>
Date: Tue, 26 Feb 2008 12:44:06 +0100
Cc: clp@xxxxxxxxxxx, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Tue, 2008-02-26 at 19:22 +0800, tgh wrote:
> could you reply in english, i could not read your letter

Don't bother. Just an autoreply generated to tell you the guy is on

Regarding your problem: There is not much you can do to get some sort
execution traces enabled automatically. You probably want to enable
debugging when building Xen and the libraries. Then maybe add a couple
of debug-print statements to the code, whereever you see fit.

I believe migration support in xend and libxc should be understandable
in isolation. The tricky parts are definitely done in C. Last time I
checked, xend mainly performed a single call to the tools and library.

Also note that random instrumentation of all code executed for
translating and mapping of the domU address space within the hypervisor
would probably soon get more verbose than you asked for, since some of
the functions involved can be called at a comparatively high frequency.

Rule 1 when digging your way through complex systems: Divide and
Conquer. Division comes first. Understand one thing at a time, starting
at a comparatively high-level, then selectively dig deeper.


> clp@xxxxxxxxxxx 写道:
> > Vielen Dank für Ihre Nachricht. 
> >
> > Ich bin vom 22-02-08 bis 07-03-08 nicht im Hause und werde Ihre
> E-Mail ab dem 10-03-07  bearbeiten.
> >
> > In dringenden Fällen wenden Sie sich bitte an Herrn Fabio Lüdi, er
> wird Ihnen gerne weiterhelfen.
> >
> > Sie erreichen Herrn Lüdi unter:
> > Phone +41 61 6666 406
> > E-Mail fl@xxxxxxxxxxx

Daniel Stodden
LRR     -      Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33  3D80 457E 82AE B0D8 735B

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