Re: [Xen-devel] help for python log in xen-4.4.1

[Wei Liu]

Please don't top-post.

On Tue, Oct 20, 2015 at 10:58:56AM +0800, 高强 wrote:
> Hi,
> 
> If you know, could you tell me the call relationship of command "xl save".
> Example, when I execute "xl save",which function will be called first,and
> then call which function? I mainly want to know which python function will
> be called.
> 

No python code will be called if you're using xl toolstack.

The code for xl and the underly library libxl is in tools/libxl directory.
Most of the time, you should be able to get the call chain by simply
inspecting the code.

Wei.

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[Xen-devel] help for python log in xen-4.4.1

[高强]

Hi,alls


There are some python code in xen-4.4.1,and in the python code there are
lots debug information such as
log.debug("***"),log.exception("***"),XendError("*")and so on.

I want to get this kind of information but I don't know where to get them.
Can someone tell me?

else,I try to use the followed method to tracing program execution process:

import sys
f=open("/home/*/python.log","a+")
print >> f, "Save.py is start\n"
f.close()

But,I can't find the file python.log while executed end,who can tell me why?

Thanks!
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Re: [Xen-devel] help for python log in xen-4.4.1

[Wei Liu]

On Mon, Oct 19, 2015 at 10:22:52AM +0800, 高强 wrote:
> Hi,alls
> 
> 
> There are some python code in xen-4.4.1,and in the python code there are
> lots debug information such as
> log.debug("***"),log.exception("***"),XendError("*")and so on.
> 
> I want to get this kind of information but I don't know where to get them.
> Can someone tell me?
> 
> else,I try to use the followed method to tracing program execution process:
> 
> import sys
> f=open("/home/*/python.log","a+")
> print >> f, "Save.py is start\n"
> f.close()
> 
> But,I can't find the file python.log while executed end,who can tell me why?
> 

Xen 4.4 is using xl toolstack. Xend is not used so no wonder you
couldn't find any logs.

If you describe your end goal we might provide more concrete
suggestions.


Wei.

> Thanks!

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> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel


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Re: [Xen-devel] help for python log in xen-4.4.1

[高强]

Hi,

If you know, could you tell me the call relationship of command "xl save".
Example, when I execute "xl save",which function will be called first,and
then call which function? I mainly want to know which python function will
be called.

Thanks

2015-10-20 10:22 GMT+08:00 高强 :

> Hi,
>
> Thank you for your help!
>
> I'm modifying the source code of xen-4.4.1,I hope throurh printing debug
> information to track the execution order of functions and check the value
> of some variables. This is my ultimate goal.
>
> But I don't know how to do it in the python code. I tried to print debug
> information into files,but I couldn't find the file I created.
>
> Thanks
>
> 2015-10-19 17:04 GMT+08:00 Wei Liu :
>
>> On Mon, Oct 19, 2015 at 10:22:52AM +0800, 高强 wrote:
>> > Hi,alls
>> >
>> >
>> > There are some python code in xen-4.4.1,and in the python code there are
>> > lots debug information such as
>> > log.debug("***"),log.exception("***"),XendError("*")and so
>> on.
>> >
>> > I want to get this kind of information but I don't know where to get
>> them.
>> > Can someone tell me?
>> >
>> > else,I try to use the followed method to tracing program execution
>> process:
>> >
>> > import sys
>> > f=open("/home/*/python.log","a+")
>> > print >> f, "Save.py is start\n"
>> > f.close()
>> >
>> > But,I can't find the file python.log while executed end,who can tell me
>> why?
>> >
>>
>> Xen 4.4 is using xl toolstack. Xend is not used so no wonder you
>> couldn't find any logs.
>>
>> If you describe your end goal we might provide more concrete
>> suggestions.
>>
>>
>> Wei.
>>
>> > Thanks!
>>
>> > ___
>> > Xen-devel mailing list
>> > Xen-devel@lists.xen.org
>> > http://lists.xen.org/xen-devel
>>
>>
>
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Re: [Xen-devel] help for python log in xen-4.4.1

[高强]

Hi,

Thank you for your help!

I'm modifying the source code of xen-4.4.1,I hope throurh printing debug
information to track the execution order of functions and check the value
of some variables. This is my ultimate goal.

But I don't know how to do it in the python code. I tried to print debug
information into files,but I couldn't find the file I created.

Thanks

2015-10-19 17:04 GMT+08:00 Wei Liu :

> On Mon, Oct 19, 2015 at 10:22:52AM +0800, 高强 wrote:
> > Hi,alls
> >
> >
> > There are some python code in xen-4.4.1,and in the python code there are
> > lots debug information such as
> > log.debug("***"),log.exception("***"),XendError("*")and so
> on.
> >
> > I want to get this kind of information but I don't know where to get
> them.
> > Can someone tell me?
> >
> > else,I try to use the followed method to tracing program execution
> process:
> >
> > import sys
> > f=open("/home/*/python.log","a+")
> > print >> f, "Save.py is start\n"
> > f.close()
> >
> > But,I can't find the file python.log while executed end,who can tell me
> why?
> >
>
> Xen 4.4 is using xl toolstack. Xend is not used so no wonder you
> couldn't find any logs.
>
> If you describe your end goal we might provide more concrete
> suggestions.
>
>
> Wei.
>
> > Thanks!
>
> > ___
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>
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