Re: callgraph not supported on my RHEL4 x86_64

[C K K. <ckk...@gm...>]

Oh ... does generating callgraph for application also depend on the kernel's
backtrace support?

On Tue, Aug 10, 2010 at 9:22 PM, William Cohen <wc...@re...> wrote:

> On 08/10/2010 08:34 AM, Maucci, Cyrille wrote:
> > Have you patch the kernel with the call graph support patch?
>
> Didn't see the  /dev/oprofile/backtrace_depth on RHEL-4 machine. Took a
> look at the RHEL-4 kernel.
> The RHEL-4 kernel doesn't have support for back traces no backtrace.c
> directory for RHEL4:
>
> http://rhkernel.org/RHEL4+2.6.9-89.EL/arch/i386/oprofile/
>
> RHEL-5 does have a backtrace.c
>
> http://rhkernel.org/RHEL5+2.6.18-8.el5/arch/i386/oprofile/
>
> -Will
>
> >
> >
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> --
> > *From:* C K Kashyap [mailto:ckk...@gm...]
> > *Sent:* Tuesday, August 10, 2010 12:51 PM
> > *To:* opr...@li...
> > *Subject:* callgraph not supported on my RHEL4 x86_64
> >
> > Hi,
> > I was able to build oprofile on RHEL4 x86_64 using the CVS version of the
> source.
> >
> > However when I tried to get the callgraph, I got this message -
> >
> > [ro...@gd...4 ~]# opcontrol --callgraph=100
> > Call-graph profiling unsupported on this kernel/hardware
> >
> >
> > --
> > Regards,
> > Kashyap
> >
> >
> >
> >
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-- 
Regards,
Kashyap