Re: [Xen-users] how to use xentrace and xentrace_format

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

>         I have read the man page for xentrace and xentrace_format. But I am
> still puzzled on how to use them.
>
> Could somebody give me an example about how to use xentrace and
> xentrace_format.
>
> What I have done is that:
>
> 1.       Root:/# Xentrace
>
> The display is Cannot output to a TTY, specify a log file
>
> 2.       Root:/# xentrace /var/perftests/xentrace.log

The problem here is possibly that you've not specified an event mask.  Try 
invoking xentrace with "-e all" to tell it to log all events.

An easy way to tell if this is the problem is probably to ls -l and look at 
the size of the file.  If it's small and not growing, then xentrace probably 
isn't collecting events for you!

> Then I use xentrace_format to get what I want
>
> 3.       cat /var/perftests/xentrace.log | xentrace_format myformat


That looks right too...  but what is myformat?  Using the default formats file 
from the Xen distribution is probably a good start when you're playing around 
with this, at least until you know you can get some output.

Cheers,
Mark

> But nothing could I get.
>
>
>
> Really need your help.
>
>
>
> Thanks,
>
> Dowen



-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users