linux.git/tools/perf/Makefile.perf, branch for-next

perf build: Make libunwind opt-in rather than opt-out

2024-11-04T19:32:35+00:00

Having multiple unwinding libraries makes the perf code harder to
understand and we have unused/untested code paths.

Perf made BPF support an opt-out rather than opt-in feature. As libbpf
has a libelf dependency, elfutils that provides libelf will also
provide libdw. When libdw is present perf will use libdw unwinding
rather than libunwind unwinding even if libunwind support is compiled
in.

Rather than have libunwind built into perf and never used, explicitly
disable the support and make it opt-in.

Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Link: https://lore.kernel.org/r/20241028193619.247727-1-irogers@google.com
Closes: https://lore.kernel.org/linux-perf-users/CAP-5=fUXkp-d7gkzX4eF+nbjb2978dZsiHZ9abGHN=BN1qAcbg@mail.gmail.com/
Signed-off-by: Namhyung Kim

perf build: Rename NO_DWARF to NO_LIBDW

2024-10-18T17:17:40+00:00

NO_DWARF could mean more than NO_LIBDW support, in particular no
libunwind support. Rename to be more intention revealing.

Signed-off-by: Ian Rogers 
Reviewed-by: Masami Hiramatsu (Google) 
Acked-by: Namhyung Kim 
Tested-by: Leo Yan 
Cc: Anup Patel 
Cc: Yang Jihong 
Cc: Palmer Dabbelt 
Cc: David S. Miller 
Cc: Albert Ou 
Cc: Shenlin Liang 
Cc: Nick Terrell 
Cc: Guilherme Amadio 
Cc: Steinar H. Gunderson 
Cc: Changbin Du 
Cc: Alexander Lobakin 
Cc: Przemek Kitszel 
Cc: Huacai Chen 
Cc: Guo Ren 
Cc: Masahiro Yamada 
Cc: Will Deacon 
Cc: James Clark 
Cc: Mike Leach 
Cc: Chen Pei 
Cc: Leo Yan 
Cc: Oliver Upton 
Cc: Aditya Gupta 
Cc: Kajol Jain 
Cc: Athira Rajeev 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-riscv@lists.infradead.org
Cc: Bibo Mao 
Cc: John Garry 
Cc: Atish Patra 
Cc: Dima Kogan 
Cc: Paul Walmsley 
Cc: Dr. David Alan Gilbert 
Cc: linux-csky@vger.kernel.org
Link: https://lore.kernel.org/r/20241017001354.56973-3-irogers@google.com
Signed-off-by: Namhyung Kim

perf test: Move attr files into shell directory where they are used

2024-10-17T20:17:36+00:00

Now the attr tests are shell tests move the associated python and
configuration files. Update the installation build rules for the new
directories. Recycle the lib install rules for python files allowing
the explicit attr.py install line to be dropped.

Signed-off-by: Ian Rogers 
Tested-by: Athira Rajeev 
Cc: Stephen Rothwell 
Cc: zhaimingbing 
Cc: Howard Chu 
Cc: Ze Gao 
Cc: Weilin Wang 
Cc: James Clark 
Cc: Leo Yan 
Cc: Thomas Richter 
Cc: Veronika Molnarova 
Link: https://lore.kernel.org/r/20241015000158.871828-4-irogers@google.com
Signed-off-by: Namhyung Kim

perf testsuite: Install perf-report tests in the 'make install-tests -C tools/perf' target

2024-08-28T21:07:21+00:00

Signed-off-by: Michael Petlan 
Cc: Athira Rajeev 
Cc: Ian Rogers 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/r/20240702110849.31904-13-vmolnaro@redhat.com
Signed-off-by: Veronika Molnarova 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Create source symlink in perf object dir

2024-08-09T20:37:24+00:00

Create a source symlink to the original source in the objdir.

This is similar to what the main kernel build script does.

Committer testing:

  ⬢[acme@toolbox perf-tools-next]$ make O=/tmp/build/$(basename $PWD)/ -C tools/perf install-bin
  
  ⬢[acme@toolbox perf-tools-next]$ ls -la /tmp/build/perf-tools-next/source
  lrwxrwxrwx. 1 acme acme 41 Aug  9 16:26 /tmp/build/perf-tools-next/source -> /home/acme/git/perf-tools-next/tools/perf
  ⬢[acme@toolbox perf-tools-next]$

Signed-off-by: Andi Kleen 
Tested-by: Arnaldo Carvalho de Melo 
Acked-by: Ian Rogers 
Acked-by: Namhyung Kim 
Link: https://lore.kernel.org/r/20240807231823.898979-1-ak@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf jevents: Autogenerate empty-pmu-events.c

2024-08-01T21:55:55+00:00

empty-pmu-events.c exists so that builds may occur without python
being installed on a system. Manually updating empty-pmu-events.c to
be in sync with jevents.py is a pain, let's use jevents.py to generate
empty-pmu-events.c.

1) change jevents.py so that an arch and model of none cause
   generation of a pmu-events.c without any json. Add a SPDX and
   autogenerated warning to the start of the file.

2) change Build so that if a generated pmu-events.c for arch none and
   model none doesn't match empty-pmu-events.c the build fails with a
   cat of the differences. Update Makefile.perf to clean up the files
   used for this.

3) update empty-pmu-events.c to match the output of jevents.py with
   arch and mode of none.

Committer notes:

The firtst paragraph is confusing, so I asked and Ian further clarified:

 ---
The requirement for python hasn't changed.

Case 1: no python or NO_JEVENTS=1
Build happens using empty-pmu-events.c that is checked in, no python
is required.

Case 2: python
pmu-events.c is created by jevents.py (requiring python) and then built.
This change adds a step where the empty-pmu-events.c is created using
jevents.py and that file is diffed against the checked in version.

This stops the checked in empty-pmu-events.c diverging if changes are
made to jevents.py. If the diff causes the build to fail then you just
copy the diff empty-pmu-events.c over the checked in one.
 ---

Reviewed-by: John Garry 
Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: Jing Zhang 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Oliver Sang 
Cc: Peter Zijlstra 
Cc: Philip Li 
Cc: Sandipan Das 
Cc: Weilin Wang 
Cc: Xu Yang 
Link: https://lore.kernel.org/r/20240730191744.3097329-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf: build: Setup PKG_CONFIG_LIBDIR for cross compilation

2024-07-26T18:14:56+00:00

On recent Linux distros like Ubuntu Noble and Debian Bookworm, the
'pkg-config-aarch64-linux-gnu' package is missing. As a result, the
aarch64-linux-gnu-pkg-config command is not available, which causes
build failures.

When a build passes the environment variables PKG_CONFIG_LIBDIR or
PKG_CONFIG_PATH, like a user uses make command or a build system
(like Yocto, Buildroot, etc) prepares the variables and passes to the
Perf's Makefile, the commit keeps these variables for package
configuration. Otherwise, this commit sets the PKG_CONFIG_LIBDIR
variable to use the Multiarch libs for the cross compilation.

Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-2-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf install: Don't propagate subdir to Documentation submake

2024-07-04T00:11:38+00:00

Explicitly reset 'subdir' variable when descending to
tools/perf/Documentation.  Similar to commit f89fb55714b62 ("perf build:
Don't propagate subdir to submakes for install_headers", 2023-01-02),
calling the 'tools/perf_install' target via top-levels Makefile results
in repeated subdir components when attempting to call the perf
documentation installation rules:

    $ make tools/perf_install NO_LIBTRACEEVENT=1 JOBS=1
    [...]
    /bin/sh: 1: cd: can't cd to /data/linux/kbuild/tools/perf/tools/perf/
    ../../scripts/Makefile.include:17: *** output directory "/data/linux/kbuild/tools/perf/tools/perf/" does not exist.  Stop.
    make[5]: *** [Makefile.perf:1096: try-install-man] Error 2
    make[4]: *** [Makefile.perf:264: sub-make] Error 2
    make[3]: *** [Makefile:113: install] Error 2
    make[2]: *** [Makefile:131: perf_install] Error 2

Resetting 'subdir' fixes the call from top-level Makefile.

Reported-by: Uwe Kleine-König 
Signed-off-by: Nicolas Schier 
Acked-by: Uwe Kleine-König 
Tested-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20240523-make-tools-perf-install-v1-1-3903499e637f@avm.de
Signed-off-by: Namhyung Kim

Merge remote-tracking branch 'perf-tools' into perf-tools-next

2024-07-02T18:51:32+00:00

Merge fixes and updates in v6.10 into perf-tools-next to resolve changes
in synthesizing the LOST_SAMPLES records and build fixes.

Signed-off-by: Namhyung Kim

perf python: Clean up build dependencies

2024-06-26T18:10:25+00:00

The python build now depends on libraries and doesn't use
python-ext-sources except for the util/python.c dependency. Switch to
just directly depending on that file and util/setup.py. This allows
the removal of python-ext-sources.

Signed-off-by: Ian Rogers 
Reviewed-by: James Clark 
Cc: Suzuki K Poulose 
Cc: Kees Cook 
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Nick Terrell 
Cc: Gary Guo 
Cc: Alex Gaynor 
Cc: Boqun Feng 
Cc: Wedson Almeida Filho 
Cc: Ze Gao 
Cc: Alice Ryhl 
Cc: Andrei Vagin 
Cc: Yicong Yang 
Cc: Jonathan Cameron 
Cc: Guo Ren 
Cc: Miguel Ojeda 
Cc: Will Deacon 
Cc: Mike Leach 
Cc: Leo Yan 
Cc: Oliver Upton 
Cc: John Garry 
Cc: Benno Lossin 
Cc: Björn Roy Baron 
Cc: Andreas Hindborg 
Cc: Paul Walmsley 
Signed-off-by: Namhyung Kim 
Link: https://lore.kernel.org/r/20240625214117.953777-9-irogers@google.com