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authorArnaldo Carvalho de Melo <acme@redhat.com>2024-09-10 22:44:21 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2024-09-11 15:35:34 +0300
commit9327f0ecad48517d4f6f9dfa7b194d0cf53092ea (patch)
tree148caf72dd686c541a2e2639c5ad8473ebbb1f78 /tools/perf/Makefile.config
parent4c1af9bf97eb56d069421c3233ce61608458d5c8 (diff)
downloadlinux-9327f0ecad48517d4f6f9dfa7b194d0cf53092ea.tar.xz
perf build: Require at least clang 16.0.6 to build BPF skeletons
Howard reported problems using perf features that use BPF: perf $ clang -v Debian clang version 15.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /bin Found candidate GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12 Selected GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12 Candidate multilib: .;@m64 Selected multilib: .;@m64 perf $ ./perf trace -e write --max-events=1 libbpf: prog 'sys_enter_rename': BPF program load failed: Permission denied libbpf: prog 'sys_enter_rename': -- BEGIN PROG LOAD LOG -- 0: R1=ctx() R10=fp0 But it works with: perf $ clang -v Debian clang version 16.0.6 (15~deb12u1) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /bin Found candidate GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12 Selected GCC installation: /bin/../lib/gcc/x86_64-linux-gnu/12 Candidate multilib: .;@m64 Selected multilib: .;@m64 perf $ ./perf trace -e write --max-events=1 0.000 ( 0.009 ms): gmain/1448 write(fd: 4, buf: \1\0\0\0\0\0\0\0, count: 8) = 8 (kworker/0:0-eve) perf $ So lets make that the required version, if you happen to have a slightly older version where this work, please report so that we can adjust the minimum required version. Reported-by: Howard Chu <howardchu95@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alan Maguire <alan.maguire@oracle.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/ZuGL9ROeTV2uXoSp@x1 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Makefile.config')
-rw-r--r--tools/perf/Makefile.config4
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 37e3eee2986e..4c1f75e326e2 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -705,8 +705,8 @@ ifeq ($(BUILD_BPF_SKEL),1)
BUILD_BPF_SKEL := 0
else
CLANG_VERSION := $(shell $(CLANG) --version | head -1 | sed 's/.*clang version \([[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+\).*/\1/g')
- ifeq ($(call version-lt3,$(CLANG_VERSION),12.0.1),1)
- $(warning Warning: Disabled BPF skeletons as reliable BTF generation needs at least $(CLANG) version 12.0.1)
+ ifeq ($(call version-lt3,$(CLANG_VERSION),16.0.6),1)
+ $(warning Warning: Disabled BPF skeletons as at least $(CLANG) version 16.0.6 is reported to be a working setup with the current of BPF based perf features)
BUILD_BPF_SKEL := 0
endif
endif