Re: [Xen-devel] Log Messages ....

[kumara rathnavel <kumara.bsd@xxxxxxxxx>]

Hello George..Â

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. Â

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

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

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

Â-George

> On 2 Dec 2015 19:34, "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx> wrote:
>
>> On Wed, Dec 2, 2015 at 1:49 PM, kumara rathnavel <kumara.bsd@xxxxxxxxx>
>> 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
>>
>>Â -George
>>
>

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