Log Messages ....

Log Messages ....

[kumara rathnavel]

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Hello All,

I require logs of the Hypercalls made from Guest to the Hypervisor after
the boot, as xl dmesg provides me with the log messages during the
initialisation.

This would be a very great help!

Thanks in advance !!

Thanking you,
Kumar

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Re: Log Messages ....

[George Dunlap]

On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@gmail.com> wrote:
> Hello All,
>
> I require logs of the Hypercalls made from Guest to the Hypervisor after the
> boot, as xl dmesg provides me with the log messages during the
> initialisation.

One thing you could look at is xentrace and xenalyze.  You can find a
brief introduction here:

https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/

You can enable Xen tracing on the Xen command-line using the
"tbuf_size" and "tevt_mask" parameters described here:

http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html

 -George

Re: Log Messages ....

[kumara rathnavel]

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Hello George,

Thanks a lot. One more question if  I connect serial port will I be able to
see what is happening in xen....without using xen trace ....
On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com> wrote:

> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@gmail.com>
> wrote:
> > Hello All,
> >
> > I require logs of the Hypercalls made from Guest to the Hypervisor after
> the
> > boot, as xl dmesg provides me with the log messages during the
> > initialisation.
>
> One thing you could look at is xentrace and xenalyze.  You can find a
> brief introduction here:
>
> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
>
> You can enable Xen tracing on the Xen command-line using the
> "tbuf_size" and "tevt_mask" parameters described here:
>
> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
>
>  -George
>

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Re: Log Messages ....

[George Dunlap]

On 02/12/15 16:48, kumara rathnavel wrote:
> Hello George,
> 
> Thanks a lot. One more question if  I connect serial port will I be able to
> see what is happening in xen....without using xen trace ....

Please don't top-post. :-)

If you set up a serial console you'll be able to get the same output as
"xl dmesg".

Here's a guide for serial consoles in Xen in case you need it:

http://wiki.xenproject.org/wiki/Xen_Serial_Console

 -George

> On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com> wrote:
> 
>> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@gmail.com>
>> wrote:
>>> Hello All,
>>>
>>> I require logs of the Hypercalls made from Guest to the Hypervisor after
>> the
>>> boot, as xl dmesg provides me with the log messages during the
>>> initialisation.
>>
>> One thing you could look at is xentrace and xenalyze.  You can find a
>> brief introduction here:
>>
>> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
>>
>> You can enable Xen tracing on the Xen command-line using the
>> "tbuf_size" and "tevt_mask" parameters described here:
>>
>> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
>>
>>  -George
>>
> 

Re: Log Messages ....

[kumara rathnavel]

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Thanks a lot George!!!....Hope XENTRACE will help me!!!

On 2 December 2015 at 22:25, George Dunlap <george.dunlap@citrix.com> wrote:

> On 02/12/15 16:48, kumara rathnavel wrote:
> > Hello George,
> >
> > Thanks a lot. One more question if  I connect serial port will I be able
> to
> > see what is happening in xen....without using xen trace ....
>
> Please don't top-post. :-)
>
> If you set up a serial console you'll be able to get the same output as
> "xl dmesg".
>
> Here's a guide for serial consoles in Xen in case you need it:
>
> http://wiki.xenproject.org/wiki/Xen_Serial_Console
>
>  -George
>
> > On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com>
> wrote:
> >
> >> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@gmail.com>
> >> wrote:
> >>> Hello All,
> >>>
> >>> I require logs of the Hypercalls made from Guest to the Hypervisor
> after
> >> the
> >>> boot, as xl dmesg provides me with the log messages during the
> >>> initialisation.
> >>
> >> One thing you could look at is xentrace and xenalyze.  You can find a
> >> brief introduction here:
> >>
> >>
> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
> >>
> >> You can enable Xen tracing on the Xen command-line using the
> >> "tbuf_size" and "tevt_mask" parameters described here:
> >>
> >> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
> >>
> >>  -George
> >>
> >
>
>

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Re: Log Messages ....

[kumara rathnavel]

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Hello George,

Is there any way to enable xentrace......I am not able to get any
logs.......I am using xentrace_format to view the output ......

Thankyou,
Kumar

On 3 December 2015 at 10:22, kumara rathnavel <kumara.bsd@gmail.com> wrote:

> Thanks a lot George!!!....Hope XENTRACE will help me!!!
>
> On 2 December 2015 at 22:25, George Dunlap <george.dunlap@citrix.com>
> wrote:
>
>> On 02/12/15 16:48, kumara rathnavel wrote:
>> > Hello George,
>> >
>> > Thanks a lot. One more question if  I connect serial port will I be
>> able to
>> > see what is happening in xen....without using xen trace ....
>>
>> Please don't top-post. :-)
>>
>> If you set up a serial console you'll be able to get the same output as
>> "xl dmesg".
>>
>> Here's a guide for serial consoles in Xen in case you need it:
>>
>> http://wiki.xenproject.org/wiki/Xen_Serial_Console
>>
>>  -George
>>
>> > On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com>
>> wrote:
>> >
>> >> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@gmail.com
>> >
>> >> wrote:
>> >>> Hello All,
>> >>>
>> >>> I require logs of the Hypercalls made from Guest to the Hypervisor
>> after
>> >> the
>> >>> boot, as xl dmesg provides me with the log messages during the
>> >>> initialisation.
>> >>
>> >> One thing you could look at is xentrace and xenalyze.  You can find a
>> >> brief introduction here:
>> >>
>> >>
>> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
>> >>
>> >> You can enable Xen tracing on the Xen command-line using the
>> >> "tbuf_size" and "tevt_mask" parameters described here:
>> >>
>> >> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
>> >>
>> >>  -George
>> >>
>> >
>>
>>
>

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Re: Log Messages ....

[kumara rathnavel]

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And it is from the Dom0 the logs of both DomUs and hypervisor are recorded
ryt? Correct me if I am wrong. My Dom0 is FreeBSD11

On 3 December 2015 at 11:17, kumara rathnavel <kumara.bsd@gmail.com> wrote:

> Hello George,
>
> Is there any way to enable xentrace......I am not able to get any
> logs.......I am using xentrace_format to view the output ......
>
> Thankyou,
> Kumar
>
> On 3 December 2015 at 10:22, kumara rathnavel <kumara.bsd@gmail.com>
> wrote:
>
>> Thanks a lot George!!!....Hope XENTRACE will help me!!!
>>
>> On 2 December 2015 at 22:25, George Dunlap <george.dunlap@citrix.com>
>> wrote:
>>
>>> On 02/12/15 16:48, kumara rathnavel wrote:
>>> > Hello George,
>>> >
>>> > Thanks a lot. One more question if  I connect serial port will I be
>>> able to
>>> > see what is happening in xen....without using xen trace ....
>>>
>>> Please don't top-post. :-)
>>>
>>> If you set up a serial console you'll be able to get the same output as
>>> "xl dmesg".
>>>
>>> Here's a guide for serial consoles in Xen in case you need it:
>>>
>>> http://wiki.xenproject.org/wiki/Xen_Serial_Console
>>>
>>>  -George
>>>
>>> > On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com>
>>> wrote:
>>> >
>>> >> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <
>>> kumara.bsd@gmail.com>
>>> >> wrote:
>>> >>> Hello All,
>>> >>>
>>> >>> I require logs of the Hypercalls made from Guest to the Hypervisor
>>> after
>>> >> the
>>> >>> boot, as xl dmesg provides me with the log messages during the
>>> >>> initialisation.
>>> >>
>>> >> One thing you could look at is xentrace and xenalyze.  You can find a
>>> >> brief introduction here:
>>> >>
>>> >>
>>> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
>>> >>
>>> >> You can enable Xen tracing on the Xen command-line using the
>>> >> "tbuf_size" and "tevt_mask" parameters described here:
>>> >>
>>> >>
>>> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
>>> >>
>>> >>  -George
>>> >>
>>> >
>>>
>>>
>>
>

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Re: Log Messages ....

[kumara rathnavel]

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Hello George..

I just tried using the xentrace tool that you had asked me. Here is the
detailed description.

I have FeeBSD11 as my Domain0. I have built my source code with debug mode
enabled. Iam able to see the 'xl dmesg'. I run xentrace command but when I
use xenalyze I am getting an error. I have attached the screenshots of what
is happening when xentrace command is run in one window and xenalyze in
other window.

Thank you,
Kumar.

On 3 December 2015 at 11:22, kumara rathnavel <kumara.bsd@gmail.com> wrote:

> And it is from the Dom0 the logs of both DomUs and hypervisor are recorded
> ryt? Correct me if I am wrong. My Dom0 is FreeBSD11
>
> On 3 December 2015 at 11:17, kumara rathnavel <kumara.bsd@gmail.com>
> wrote:
>
>> Hello George,
>>
>> Is there any way to enable xentrace......I am not able to get any
>> logs.......I am using xentrace_format to view the output ......
>>
>> Thankyou,
>> Kumar
>>
>> On 3 December 2015 at 10:22, kumara rathnavel <kumara.bsd@gmail.com>
>> wrote:
>>
>>> Thanks a lot George!!!....Hope XENTRACE will help me!!!
>>>
>>> On 2 December 2015 at 22:25, George Dunlap <george.dunlap@citrix.com>
>>> wrote:
>>>
>>>> On 02/12/15 16:48, kumara rathnavel wrote:
>>>> > Hello George,
>>>> >
>>>> > Thanks a lot. One more question if  I connect serial port will I be
>>>> able to
>>>> > see what is happening in xen....without using xen trace ....
>>>>
>>>> Please don't top-post. :-)
>>>>
>>>> If you set up a serial console you'll be able to get the same output as
>>>> "xl dmesg".
>>>>
>>>> Here's a guide for serial consoles in Xen in case you need it:
>>>>
>>>> http://wiki.xenproject.org/wiki/Xen_Serial_Console
>>>>
>>>>  -George
>>>>
>>>> > On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@eu.citrix.com>
>>>> wrote:
>>>> >
>>>> >> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <
>>>> kumara.bsd@gmail.com>
>>>> >> wrote:
>>>> >>> Hello All,
>>>> >>>
>>>> >>> I require logs of the Hypercalls made from Guest to the Hypervisor
>>>> after
>>>> >> the
>>>> >>> boot, as xl dmesg provides me with the log messages during the
>>>> >>> initialisation.
>>>> >>
>>>> >> One thing you could look at is xentrace and xenalyze.  You can find a
>>>> >> brief introduction here:
>>>> >>
>>>> >>
>>>> https://blog.xenproject.org/2012/09/27/tracing-with-xentrace-and-xenalyze/
>>>> >>
>>>> >> You can enable Xen tracing on the Xen command-line using the
>>>> >> "tbuf_size" and "tevt_mask" parameters described here:
>>>> >>
>>>> >>
>>>> http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html
>>>> >>
>>>> >>  -George
>>>> >>
>>>> >
>>>>
>>>>
>>>
>>
>

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