Re: [linuxtools-dev] UPDATE: Re: OProfile + Linux Tools + CentOS

[Jeff Johnston <jjohnstn@xxxxxxxxxx>]

On 08/04/2011 01:02 PM, Eric Schwarz wrote:

> > > >  Did you verify that oprofile works as expected on the command line?
>
> YES.  I did it like onhttp://blogs.epfl.ch/article/24223
>
> I also tried with the latest nightly build today>  did not work either
>
>
> I executed both
>
> - install.sh
>
> - install-noconsolehelper.sh

Firstly, you don't want to run both scripts.  The script creates an 
executable called opcontrol in the Eclipse Oprofile core 
natives/linux/scripts directory.  This binary is used by the OProfile 
plug-in.

The first script creates a link opcontrol -> /usr/bin/consolehelper 
whereas the 2nd creates an opcontrol script which uses sudo to run 
/usr/bin/opcontrol.  If you run the 2nd script after the first, you will 
wipe out the results of the first and end up with the sudo solution.

I verified on an F14 VM that the install.sh works and the opcontrol 
binary runs ok (queries the root password).

However, as the blog you refer to notes: performance events don't work 
because the performance counters aren't supported.  You get back "No 
data" under Eclipse.  I get this result under my F14 VM using Fedora 
VirtManager both from the command line and Eclipse.

Following the blog's advice and switching to timer mode caused me to get 
a failure under Eclipse when it attempted to specify a performance 
counter event.

"You cannot specify any performance eventsbecause Oprofile is in timer mode"

There was no way to specify no events as un-clicking everything under 
the Profile Configurations Events tab disables the Apply and Profile 
buttons.

Unless I missed something, I think you are forced to use the command 
line and specify timer mode when running under a VM to get anything 
other than no data.

-- Jeff J.

> Many thanks for assistance
> Eric
>
> Am 04.08.2011 15:00, schrieb Severin Gehwolf:
> >  Hi,
> >
> >  On Thu, 2011-08-04 at 10:59 +0200, Eric Schwarz wrote:
> > >  Hi
> > >
> > >
> > >  I have troubles starting OProfile (0.9.4 latest Version for CentOS) out
> > >  of Eclipse on CentOS.
> > >
> > >  I have tried using CentOS 5.4 + Eclipse Helios 2 SR2 in a virtual
> > >  machine (put in timer interrupt mode like described in [1]).
> >  Eclipse oprofile hasn't worked very well in a virtual machine and is not
> >  tested very much. It may work, if the module is manually loaded with
> >  timer=1 prior profiling from within Eclipse...
> >
> >  Did you verify that oprofile works as expected on the command line? If
> >  yes, what sequence of commands did you execute to make it work?
> >
> > >  The error is the following when clicking on "Profile As>   Profile with
> > >  OProfile" in the Eclipse menu:
> > >
> > >  "Exit code of opcontrol indicates failure"
> > >
> > >  OProfile itself is working and I also executed
> > >  "natives/linux/scripts/install.sh"
> >  Does this mean that if you use opcontrol in a terminal profiling works
> >  for you? If yes, what is the sequence of commands you are executing?
> >
> > >  I have also seen some irregularities concerning the unittests of Linux
> > >  Tools 0.8.0 for OProfile support.
> > >
> > >  https://hudson.eclipse.org/hudson/job/linuxtools-Indigo/346/testReport/
> >  Last time I checked all unit tests passed for me locally. I think we
> >  can't run oprofile tests in the hudson job since it requires root access
> >  and proper installation of consolehelper/no-consolehelper (for the time
> >  being). Perhaps I'm wrong :)
> >
> > >  I also tried on a real machine (CentOS 5.6 + Eclipse Indigo) and there I
> > >  get also an error (I think it was the same on - I might deliver the
> > >  message later since I am currently at an other place).
> >  It should definitely work on a physical machine. Could you try
> >  installing latest Linux Tools from updates-nightly[1] and try again. If
> >  oprofile fails, it should give you some hints in the Eclipse error log.
> >
> > >  Well, shouldn't it work out of the box?
> >  Kind of. If you installed Linux Tools from our update-site, you need to
> >  set up consolehelper manually. After this step it should work.
> >
> >  Let us know how it goes.
> >
> >  Thanks,
> >  Severin
> >
> >  [1]http://download.eclipse.org/technology/linuxtools/update/
> >
> >  _______________________________________________
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> >  linuxtools-dev@xxxxxxxxxxx
> >  https://dev.eclipse.org/mailman/listinfo/linuxtools-dev
>
>
>
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