[Linuxppc-users] function_graph feature or its alternatives

[Dan Horák]

On Fri, 20 Jul 2018 10:59:59 +1000
Michael Ellerman <mpe at ellerman.id.au> wrote:

> Hi George,
> 
> "George Chochia" <chochia at us.ibm.com> writes:
> > Michael,
> >
> > sending the info: kernel: 4.14.0-49.10.1.el7a.ppc64le
> 
> OK, so that explains some of the confusion.
> 
> Typically "4.14.0" would mean the upstream "v4.14" tag, ie. the
> version prior to "4.14.1", which is different from what you have
> above.
> 
> You need to quote the full version string when talking about distro
> kernels.
> 
> If you use `uname -r` that should give you the right thing.
> 
> > The config file has 
> > CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
> >
> > but it does not appear in the list of available tracers
> 
> The HAVE symbol says that the architecture supports the tracer, but
> not that it's enabled.
> 
> As Naveen said you need CONFIG_FUNCTION_GRAPH_TRACER=y.
> 
> It's up to Redhat to decide what tracers they enable.

but partners and customers can influence such decisions, thus I would
recommend checking it with Red Hat


		Dan