linux.git/tools/perf/tests/make, branch master

perf data ctf: replace libbabeltrace with babeltrace2-ctf-writer

2026-06-04T20:34:52+00:00

The 1.x branch of Babeltrace has been superseded by 2.x in 2020 and has
been unmaintained since 2022, efforts have started to remove it from
popular distributions.

Babeltrace 2.x offers a very similar 'ctf-writer' library that can be used
with minimal changes for the '--to-ctf' feature and has been packaged
since Debian 11 and Fedora 32.

This patch replaces the 'libbabeltrace' build feature with
'babeltrace2-ctf-writer' using pkgconfig detection, adjusts the naming of
the public headers and applies minor API cleanups.

There is no changes to the output ctf traces, the ctf-writer API still
implements version 1.8 of the CTF specification that can be read by
either Babeltrace 1 / 2 or any CTF compliant reader.

Also remove some ifdefs in the cli option parsing to allow printing the
helpful error message with '--to-ctf' when built without babeltrace2.

Reviewed-by: Ian Rogers 
Signed-off-by: Michael Jeanson 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Derek Foreman 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Mathieu Desnoyers 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove NO_GTK2 build test

2026-05-06T01:07:36+00:00

4751bddd3f983af2 ("perf tools: Make GTK2 support opt-in") changed GTK2
build to be opt-in.

So NO_GTK2 is meaningless and we need to pass GTK2=1 to enable it.
Let's update the build-test configuration for that.

Also make_no_ui is the same as make_no_slang since NO_GTK2 is no-op.

Let's get rid of it as well.

Signed-off-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf tests: build-test coverage for NO_JEVENTS=1

2026-02-06T14:56:54+00:00

Leo reported 'perf stat' being broken and this highlighted that the
'make NO_JEVENTS=1' variant is missing from 'make -C tools/perf
build-test', add it.

Closes: https://lore.kernel.org/linux-perf-users/20260205175250.GC3529712@e132581.arm.com/
Reported-by: Leo Yan 
Reviewed-by: Leo Yan 
Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf capstone: Support for dlopen-ing libcapstone.so

2026-02-03T14:34:02+00:00

If perf is built with LIBCAPSTONE_DLOPEN=1, support dlopen-ing
libcapstone.so and then calling the necessary functions by looking them
up using dlsym.

The types come from capstone.h which means the libcapstone feature check
needs to pass, and NO_CAPSTONE=1 hasn't been defined. This will cause
the definition of HAVE_LIBCAPSTONE_SUPPORT.

Earlier versions of this code tried to declare the necessary
capstone.h constants and structs, but they weren't stable and caused
breakages across libcapstone releases.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Bill Wendling 
Cc: Charlie Jenkins 
Cc: Collin Funk 
Cc: Dmitriy Vyukov 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Justin Stitt 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: Nick Desaulniers 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove NO_LIBCAP that controls nothing

2026-02-03T14:32:16+00:00

Using libcap was removed in commit e25ebda78e230283 ("perf cap: Tidy up
and improve capability testing") and improve capability testing"),
however, some build documentation and a use of the NO_LIBCAP=1 were
lingering.

Remove these left over bits.

Fixes: e25ebda78e230283 ("perf cap: Tidy up and improve capability testing")
Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove NO_LIBDW_DWARF_UNWIND option

2026-01-20T18:43:56+00:00

Libdw unwinding support is present for every architecture that has a
perf_regs.h - perf registers are needed for the initial frame to
unwind.

Elfutils also supports SPARC, ARC and m68k but there is no support in
the Linux kernel for perf registers on these architectures.

As the perf supported DWARF unwinding architectures are a subset of the
elfutils ones, remove NO_LIBDW_DWARF_UNWIND as there isn't a case of
elfutils lacking the support need for perf.

Signed-off-by: Ian Rogers 
Cc: Aditya Bodkhe 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexandre Ghiti 
Cc: Andi Kleen 
Cc: Athira Rajeev 
Cc: Chun-Tse Shao 
Cc: Dmitriy Vyukov 
Cc: Dr. David Alan Gilbert 
Cc: Guo Ren 
Cc: Haibo Xu 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Krzysztof Łopatowski 
Cc: Leo Yan 
Cc: Mark Wielaard 
Cc: Namhyung Kim 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Sergei Trofimovich 
Cc: Shimin Guo 
Cc: Stephen Brennan 
Cc: Thomas Falcon 
Cc: Will Deacon 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Skip nondistro build test if libbfd is old

2026-01-06T22:15:49+00:00

Non distro builds now require a new version of libbfd, so skip the test
if the library is too old.

The grep test isn't a strong as the feature test in
test-libbfd-threadsafe.c, but there seems to be precedent for feature
testing this way here and it's good enough for the build-test rule. If
the function exists but returns an error it will be picked up by the
feature test when attempting the build.

Signed-off-by: James Clark 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Bill Wendling 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Justin Stitt 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: Nick Desaulniers 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove NO_AUXTRACE build option

2025-11-14T07:03:11+00:00

The NO_AUXTRACE build option was used when the __get_cpuid feature
test failed or if it was provided on the command line. The option no
longer avoids a dependency on a library and so having the option is
just adding complexity to the code base. Remove the option
CONFIG_AUXTRACE from Build files and HAVE_AUXTRACE_SUPPORT by assuming
it is always defined.

Signed-off-by: Ian Rogers 
Reviewed-by: James Clark 
Signed-off-by: Namhyung Kim

tools build: Make libperl opt-in rather than opt-out, deprecate

2025-09-19T19:07:21+00:00

If libperl is installed then the perf tool build will build against
it. There appears to be limited interest in the scripting support for
perl so let's make it opt-in and deprecate it.

With this patch applied you need to add LIBPERL=1 to get libperl
support in perf - there is no warning if libperl is missing, but
building will fail if libperl is missing and the build has LIBPERL=1.
The perf version output is changed to:
```
$ perf version --build-options
perf version 6.17.rc3.g8eca69269947
                   aio: [ on  ]  # HAVE_AIO_SUPPORT
                   bpf: [ on  ]  # HAVE_LIBBPF_SUPPORT
         bpf_skeletons: [ on  ]  # HAVE_BPF_SKEL
            debuginfod: [ on  ]  # HAVE_DEBUGINFOD_SUPPORT
                 dwarf: [ on  ]  # HAVE_LIBDW_SUPPORT
    dwarf_getlocations: [ on  ]  # HAVE_LIBDW_SUPPORT
          dwarf-unwind: [ on  ]  # HAVE_DWARF_UNWIND_SUPPORT
              auxtrace: [ on  ]  # HAVE_AUXTRACE_SUPPORT
                libbfd: [ OFF ]  # HAVE_LIBBFD_SUPPORT ( tip: Deprecated, license incompatibility, use BUILD_NONDISTRO=1 and install binutils-dev[el] )
        libbpf-strings: [ on  ]  # HAVE_LIBBPF_STRINGS_SUPPORT
           libcapstone: [ on  ]  # HAVE_LIBCAPSTONE_SUPPORT
    libdw-dwarf-unwind: [ on  ]  # HAVE_LIBDW_SUPPORT
                libelf: [ on  ]  # HAVE_LIBELF_SUPPORT
               libnuma: [ on  ]  # HAVE_LIBNUMA_SUPPORT
            libopencsd: [ OFF ]  # HAVE_CSTRACE_SUPPORT
               libperl: [ OFF ]  # HAVE_LIBPERL_SUPPORT ( tip:
Deprecated, use LIBPERL=1 and install libperl-dev to build with it )
               libpfm4: [ on  ]  # HAVE_LIBPFM
             libpython: [ on  ]  # HAVE_LIBPYTHON_SUPPORT
              libslang: [ on  ]  # HAVE_SLANG_SUPPORT
         libtraceevent: [ on  ]  # HAVE_LIBTRACEEVENT
             libunwind: [ OFF ]  # HAVE_LIBUNWIND_SUPPORT ( tip:
Deprecated, use LIBUNWIND=1 and install libunwind-dev[el] to build
with it )
                  lzma: [ on  ]  # HAVE_LZMA_SUPPORT
numa_num_possible_cpus: [ on  ]  # HAVE_LIBNUMA_SUPPORT
                  zlib: [ on  ]  # HAVE_ZLIB_SUPPORT
                  zstd: [ on  ]  # HAVE_ZSTD_SUPPORT
```

i.e. there is a tip saying about deprecation and how to get support
back.

Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Charlie Jenkins 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Michael Petlan 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Quentin Monnet 
Cc: Steven Rostedt (VMware) 
Cc: Tomas Glozar 
Cc: Yuzhuo Jing 
Link: https://lore.kernel.org/lkml/aMrk03gigBlGcYLK@x1/
Link: https://lore.kernel.org/lkml/CAP-5=fVX+bLBRJCiziDi_hBySgv2NFtDoghtpheSSxVAvvETGw@mail.gmail.com
[ Keep the pre-existing perl-ExtUtils-Embed hint for Fedora/RHEL systems ]
Signed-off-by: Arnaldo Carvalho de Melo

perf tests make: Add NO_LIBDW=1 to minimal and add standalone test

2025-07-03T18:22:48+00:00

Missing testing coverage of NO_LIBDW=1 and add NO_LIBDW=1 to the
minimal test configuration.

Signed-off-by: Ian Rogers 
Link: https://lore.kernel.org/r/20250703053622.3141424-1-irogers@google.com
Signed-off-by: Namhyung Kim