[Linuxppc-users] function_graph feature or its alternatives

[George Chochia]

Michael,

sending the info: kernel: 4.14.0-49.10.1.el7a.ppc64le

The config file has 
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y

but it does not appear in the list of available tracers

Regards
-------------------------------------------------------------------------------------
George Chochia 
Cluster Software Performance Analysis
Tel: (845) 433 3852, t/l 293 3852
E-mail: chochia at us.ibm.com




From:   Michael Ellerman <mpe at ellerman.id.au>
To:     George Chochia <chochia at us.ibm.com>, 
linuxppc-users at lists.ozlabs.org
Date:   07/18/2018 11:37 PM
Subject:        Re: [Linuxppc-users] function_graph feature or its 
alternatives



"George Chochia" <chochia at us.ibm.com> writes:

> 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.

As far as I can see, it is:

  [I] home:stable(4)(I)> l1
  commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 (HEAD, tag: v4.14)
  Author: Linus Torvalds <torvalds at linux-foundation.org>
  Date:   Sun Nov 12 10:46:13 2017 -0800
 
      Linux 4.14
  [N] home:stable(4)(N)> grep FUNCTION_GRAPH arch/powerpc/configs/*
  arch/powerpc/configs/powernv_defconfig:CONFIG_FUNCTION_GRAPH_TRACER=y
  arch/powerpc/configs/ppc64_defconfig:CONFIG_FUNCTION_GRAPH_TRACER=y
  arch/powerpc/configs/pseries_defconfig:CONFIG_FUNCTION_GRAPH_TRACER=y


Can you give us more detail. What exact config are you talking about?
What exact version, it's not entirely clear what you mean by 4.14.0.

cheers





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