[Linuxppc-users] function_graph feature or its alternatives

[Michael Ellerman]

Murilo Opsfelder Araujo <muriloo at linux.ibm.com> writes:

> On Wed, Jul 18, 2018 at 02:34:09PM -0400, George Chochia wrote:
>> Hello,
>> 
>> The CONFIG_FUNCTION_GRAPH_TRACER option is not enabled in the 4.14.0 
>> ppc64le kernel configuration file. 
>> Because of that the function_graph tracer is not available for performance 
>> analysis on customer systems.
>
> Hi, George.
>
> Are you talking about any Linux distribution specifically?
>
> CONFIG_FUNCTION_GRAPH_TRACER=y got removed from
> arch/powerpc/configs/powernv_defconfig in the upstream Linux:
>
>     https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9a018fb1e14704fef39db05730599f42cb4672ac


That doesn't disable it, it just removes mention of it from that file
because it's on by default and so there's no need for us to specify it.

cheers