how to turn on tracing in xen

how to turn on tracing in xen

[Anurag Agarwal]

Hi,

How do I turn on tracing in the Xen. I am using xen 3.0.2. I could not 
find a config option to turn ON tracing.
setsize fails with :

# setsize 20
Failure to get tbuf info from Xen. Guess size is 0: Invalid argument
This may mean that tracing is not enabled in xen.
set_size Hypercall failure: Invalid argument

May I know how to turn it on?

Thanks,
Anurag.

Re: how to turn on tracing in xen

[George Dunlap]

Until recently in the -unstable tree, setsize would return weird error
messages even if it did what it was supposed to do.  Look at the
console i/o and see if it says that tracing has been enabled, and try
using xentrace.  If xentrace works, just ignore the error messages.
Presumably the fixes in -unstable will make it into xen 3.0.3.

 -George

On 6/22/06, Anurag Agarwal <anurag_agarwal@symantec.com> wrote:
> Hi,
>
> How do I turn on tracing in the Xen. I am using xen 3.0.2. I could not
> find a config option to turn ON tracing.
> setsize fails with :
>
> # setsize 20
> Failure to get tbuf info from Xen. Guess size is 0: Invalid argument
> This may mean that tracing is not enabled in xen.
> set_size Hypercall failure: Invalid argument
>
> May I know how to turn it on?
>
> Thanks,
> Anurag.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>

Re: how to turn on tracing in xen

[Atsushi SAKAI]

At Xen 3.0.2, try tbctl command (0 or 1) 
Tracing Buffer On and Off 
(tbctl is in xentrace.)

N.B.:This is obsolate command in current change set

Thanks,
Atsushi SAKAI

>Until recently in the -unstable tree, setsize would return weird error
>messages even if it did what it was supposed to do.  Look at the
>console i/o and see if it says that tracing has been enabled, and try
>using xentrace.  If xentrace works, just ignore the error messages.
>Presumably the fixes in -unstable will make it into xen 3.0.3.
>
> -George
>
>On 6/22/06, Anurag Agarwal <anurag_agarwal@symantec.com> wrote:
>> Hi,
>>
>> How do I turn on tracing in the Xen. I am using xen 3.0.2. I could not
>> find a config option to turn ON tracing.
>> setsize fails with :
>>
>> # setsize 20
>> Failure to get tbuf info from Xen. Guess size is 0: Invalid argument
>> This may mean that tracing is not enabled in xen.
>> set_size Hypercall failure: Invalid argument
>>
>> May I know how to turn it on?
>>
>> Thanks,
>> Anurag.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>>
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@lists.xensource.com
>http://lists.xensource.com/xen-devel
>


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