Re: [PATCH 0/1] RFC: Package perf from linux kernel tools

[Henning Schild <henning.schild@siemens.com>]

Hi,

i think perf support in general is something we clearly want to have.
As far as i remember Cedric might be interested as well, adding him to
CC.

Maybe a split into the basic support and the python bindings is useful.
Because those python bindings are pretty different from upstream, and
they probably deserve a test-package if we agree that we want to
support them in isar.

Henning

Am Tue, 19 Jan 2021 13:41:57 +0100
schrieb Felix Moessbauer <felix.moessbauer@siemens.com>:

> Hi all,
> 
> this patch adds support to build the linux-perf<version> package
> that includes the kernel specific perf tooling.
> 
> During implementation I tried two different approaches:
> 1. package as part of the kernel receipt (as Debian does)
> 2. package as a regular package (similar to how the kselftest is
> packaged)
> 
> This RFC implements approach 2 but tries to be as close as possible
> to the Debian upstream packaging.
> By that, we use the same patches from Debian upstream to build our
> package. Note, that these are dependent on the exact kernel version.
> Here, I used the latest available bugfix version from upstream
> (4.19.160). Perf should then be compatible with 4.19 kernels (only
> partially tested).
> 
> A major obstacle in implementing approach 1 was that the patches for
> linux-tools are not trivial and have to match with the corresponding
> kernel version. Writing that in a way that works for various kernel
> versions was something I was not able to accomplish.
> Hence, I decided that it might be better to avoid that much
> complexity in the kernel receipt. Most users might not need the tools
> anyways, but probably a custom kernel.
> 
> Finally, this patch also builds the kernel specific python bindings
> of perf. This patch has already been sent upstream, but is not yet
> integrated in Debian. For reference, see here:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860957
> 
> Best regards,
> Felix Mößbauer
> 
> Felix Moessbauer (1):
>   RFC: Package perf from linux kernel tools
> 
>  .../recipes-kernel/linux-perf/files/rules     |  53 ++++++++
>  .../linux-perf/files/tools-perf-install.patch |  58 +++++++++
>  .../linux-perf/files/tools-perf-python.patch  |  55 ++++++++
>  .../linux-perf/files/tools-perf-version.patch | 119
> ++++++++++++++++++ .../linux-perf/linux-perf-4.19_4.19.160.bb    |
> 11 ++ .../recipes-kernel/linux-perf/linux-perf.inc  |  46 +++++++
>  6 files changed, 342 insertions(+)
>  create mode 100644 meta-isar/recipes-kernel/linux-perf/files/rules
>  create mode 100644
> meta-isar/recipes-kernel/linux-perf/files/tools-perf-install.patch
> create mode 100644
> meta-isar/recipes-kernel/linux-perf/files/tools-perf-python.patch
> create mode 100644
> meta-isar/recipes-kernel/linux-perf/files/tools-perf-version.patch
> create mode 100644
> meta-isar/recipes-kernel/linux-perf/linux-perf-4.19_4.19.160.bb
> create mode 100644 meta-isar/recipes-kernel/linux-perf/linux-perf.inc
>