[ltt-dev] ltt-dev Digest, Vol 12, Issue 17

Mon Apr 13 19:59:40 EDT 2009

You should probably zoom out to see the entire trace so you can see your
program. The "time window" shown by lttv is 1 second by default,
starting from the beginning of the trace. Use the scrollbar at the
bottom to move it.

Also make sure you look for the appropriate executable name. For
instance, if you run a bash script, the executable will be named "bash".

Mathieu

* Shouwei Li (casmyu at gmail.com) wrote:
> Hi,
> I have read many papers on the web site even plus some articles get from
> google, maybe for my foolish, I have not known how to trace a private
> program till now.  My setps is like this:
> 1. open the lttv-gui, then start to trace
> 2. I run a program which written by myself.
> 3. after the program stop, I stop the lttv trace
> 4. then check the report generated by lttv
> But every time, what I say are all the system process. such as init, su,
> bash, sshd, vsftpd and so on. I can not find any information about my own
> process.
> Please tell me what is my mistake. why I can not see my private program's
> information. If possible, please supply a document about how to trace a
> private program to me.
> Thank you very much!
> 
> On Mon, Apr 13, 2009 at 12:00 AM, <ltt-dev-request at lists.casi.polymtl.ca>wrote:
> 
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> >
> > Today's Topics:
> >
> >   1. ltt used in network IO tracing under the environment of   KVM? (??)
> >   2. Re: Run lttv-gui error (Mathieu Desnoyers)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Thu, 9 Apr 2009 16:32:06 +0800
> > From: ?? <zengshan227 at gmail.com>
> > To: ltt-dev at lists.casi.polymtl.ca
> > Subject: [ltt-dev] ltt used in network IO tracing under the
> >        environment of  KVM?
> > Message-ID:
> >        <9f49f7820904090132m1edf65d3n1bf13f8fcdf1b73b at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi all:
> >  I am a newbie in ltt, and I am wondering whether ltt can be used to trace
> > the network I/O under the  environment of KVM(Kernel based Virtual
> > Machine)?  What I want to know exactly is the ingressing path of a packet
> > from the host linux kernel to the guest os.
> >  Any ideas?
> >  Thank you very much!
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: <
> > http://lists.casi.polymtl.ca/pipermail/ltt-dev/attachments/20090409/da7b0d82/attachment-0001.html
> > >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Sat, 11 Apr 2009 21:40:42 -0400
> > From: Mathieu Desnoyers <compudj at krystal.dyndns.org>
> > To: Shouwei Li <casmyu at gmail.com>
> > Cc: ltt-dev at lists.casi.polymtl.ca
> > Subject: Re: [ltt-dev] Run lttv-gui error
> > Message-ID: <20090412014042.GA5822 at Krystal>
> > Content-Type: text/plain; charset=us-ascii
> >
> > * Shouwei Li (casmyu at gmail.com) wrote:
> > > My OS is debian 5.0, so I think su command is avaiable. I have compile
> > > the kernel, lttng to the latest version, so I can make sure that no
> > > compatibility problem.
> > >
> > > You, it will show all the system calls done by the processes you are
> > > interested into.
> >
> > By you I meant "Yes", sorry.
> >
> > >
> > ----------------------------------------------------------------------------------------------------
> > > Where I can get some documents about this topics.
> > >
> >
> > See the LTTng Manual on the lttng.org website, and the papers published
> > on this same website.
> >
> > Mathieu
> >
> > > Thank you very much! ^_^
> > >
> > > On 4/11/09, Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:
> > > > * Shouwei Li (casmyu at gmail.com) wrote:
> > > >> Hello, friends:
> > > >> I login OS with root account. then I run lttv-gui like this:
> > > >> [root][~]# export DISPLAY=192.168.153.1:0.0
> > > >> [root][~]# lttv-gui
> > > >> I have opend xmanager(passive), then the GUI pop up.
> > > >> Then I click the Insert Tracing Control Module button(The traffic
> > > >> light), after input the root passwd, I click start button, but an
> > > >> error message box pop up, the error message is "A problem occured when
> > > >> executing the su command : Operation not permitted". Please tell me
> > > >> why and how to solve this problem.
> > > >
> > > > If you are on ubuntu, su is disabled. You would have to figure out how
> > > > to reenable it using their documentation. Or you can use the lttctl
> > > > command directly to control tracing instead, as stated in the
> > > > documentation.
> > > >
> > > > Also make sure your
> > > > lttv
> > > > ltt-control
> > > > lttng
> > > >
> > > > versions follow the compatibility list on the lttng.org website.
> > > >
> > > >> One more question: I want to monitor a program which executed from
> > > >> bash, all the processes of this program execute. Include from bash to
> > > >> execv, how the dynamic loader loaded the elf file and the other
> > > >> libraries and so on. Does lttv can be competent for this work?
> > > >> Thank you very much!
> > > >
> > > > You, it will show all the system calls done by the processes you are
> > > > interested into.
> > > >
> > > > Mathieu
> > > >
> > > >> --
> > > >> Best Regards!
> > > >> Shouwei Li
> > > >>
> > > >> _______________________________________________
> > > >> ltt-dev mailing list
> > > >> ltt-dev at lists.casi.polymtl.ca
> > > >> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
> > > >>
> > > >
> > > > --
> > > > Mathieu Desnoyers
> > > > OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE
> > 9A68
> > > >
> > >
> > >
> > > --
> > > Best Regards!
> > > Shouwei Li
> > >
> >
> > --
> > Mathieu Desnoyers
> > OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
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> > ltt-dev at lists.casi.polymtl.ca
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> >
> > End of ltt-dev Digest, Vol 12, Issue 17
> > ***************************************
> >
> 
> 
> 
> -- 
> Best Regards!
> Shouwei Li

> _______________________________________________
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-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68