kernel/linux.git/tools/perf/Makefile.perf, branch v7.1-rc5

perf trace: Add beautifier script for fsmount flags

2026-05-14T21:48:32+00:00

And move the existing one to fsmount_attr.sh to be more precise. Now the fsmount_flags[] is generated from the mount.h like below. The ilog2() + 1 is an existing pattern to handle bit flags. $ cat tools/perf/trace/beauty/generated/fsmount_arrays.c static const char *fsmount_flags[] = { [ilog2(0x00000001) + 1] = "CLOEXEC", [ilog2(0x00000002) + 1] = "NAMESPACE", }; It was found by Sashiko during the review. Reviewed-by: Ian Rogers Signed-off-by: Namhyung Kim

perf build: Add make check-headers target

2026-05-14T21:48:32+00:00

Don't print header differences during the perf build as it's noisy. Mostly people won't care and find it annoying. As it's to improve perf trace beautifier to catch up new changes mostly in UAPIs, we can make it a separate build target and call it occasionally. Make it and build-test related targets phony. Reviewed-by: Ian Rogers Signed-off-by: Namhyung Kim

perf beauty: Move copy of fadvise.h from tools/include/ to tools/perf/trace/beauty/include/

2026-04-01T03:23:06+00:00

As it is not really used when compiling anything, just being parsed to collect number->string tables for 'perf trace'. $ git grep fadvise.h tools/ tools/perf/Makefile.perf:$(fadvise_advice_array): $(beauty_uapi_linux_dir)/fadvise.h $(fadvise_advice_tbl) tools/perf/check-headers.sh: "include/uapi/linux/fadvise.h" tools/perf/trace/beauty/fadvise.sh:grep -E $regex ${header_dir}/fadvise.h | \ tools/perf/trace/beauty/fadvise.sh:# tools/include/uapi/linux/fadvise.h for details. $ Link: https://lore.kernel.org/r/CAP-5=fVBNQVF8k3JUQjH1nkP69ZVp8BqP+uwygcx=xO0zC4xrg@mail.gmail.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

perf beauty: Move tools/include/uapi/drm to tools/perf/trace/beauty/include/uapi

2026-04-01T03:23:01+00:00

As it is used only to parse ioctl numbers, not to build perf and so far no other tools/ living tool uses it, so to clean up tools/include/ to be used just for building tools, to have access to things available in the kernel and not yet in the system headers, move it to the directory where just the tools/perf/trace/beauty/ scripts can use to generate tables used by perf. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

tools build: Fix rust cross compilation

2026-03-04T14:37:30+00:00

Currently no target is specified to compile rust code when needed, which breaks cross compilation. E.g. for arm64: LD /tmp/build/tests/workloads/perf-test-in.o aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) [...repeated...] aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a: error adding symbols: file in wrong format make[5]: *** [/perf/tools/build/Makefile.build:162: /tmp/build/tests/workloads/perf-test-in.o] Error 1 make[4]: *** [/perf/tools/build/Makefile.build:156: workloads] Error 2 make[3]: *** [/perf/tools/build/Makefile.build:156: tests] Error 2 make[2]: *** [Makefile.perf:785: /tmp/build/perf-test-in.o] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [Makefile.perf:289: sub-make] Error 2 make: *** [Makefile:76: all] Error 2 Detect required target and pass it via rust_flags to the compiler. Note that CROSS_COMPILE might be different from what rust compiler expects, since it may omit the target vendor value, e.g. "aarch64-linux-gnu" instead of "aarch64-unknown-linux-gnu". Thus explicitly map supported CROSS_COMPILE values to corresponding Rust versions, as suggested by Miguel Ojeda. Tested using arm64 cross-compilation example from [1]. Fixes: 2e05bb52a12d3cdb ("perf test workload: Add code_with_type test workload") Reviewed-by: Ian Rogers Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Levi Zim Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nicolas Schier Link: https://perfwiki.github.io/main/arm64-cross-compilation-dockerfile/ [1] Signed-off-by: Arnaldo Carvalho de Melo

perf build: Allow passing extra Clang flags via EXTRA_BPF_FLAGS

2026-02-12T20:45:22+00:00

Add support for EXTRA_BPF_FLAGS in the eBPF skeleton build, allowing users to pass additional clang options such as --sysroot or custom include paths when cross-compiling perf. This is primarily intended for cross-build scenarios where the default host include paths do not match the target kernel version. Example usage: make perf ARCH="arm64" EXTRA_BPF_FLAGS="--sysroot=..." Reviewed-by: Namhyung Kim Signed-off-by: hupu Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Justin Stitt Cc: Mark Rutland Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf test workload: Add code_with_type test workload

2026-02-08T22:16:24+00:00

The purpose of the workload is to gather samples of rust runtime. To achieve that it has a dummy rust library linked with it. Per recommendations for such scenarios [1], the rust library is statically linked. An example: $ perf record perf test -w code_with_type [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.160 MB perf.data (4074 samples) ] $ perf report --stdio --dso perf -s srcfile,srcline 45.16% ub_checks.rs ub_checks.rs:72 6.72% code_with_type.rs code_with_type.rs:15 6.64% range.rs range.rs:767 4.26% code_with_type.rs code_with_type.rs:21 4.23% range.rs range.rs:0 3.99% code_with_type.rs code_with_type.rs:16 [...] [1]: https://doc.rust-lang.org/reference/linkage.html#mixed-rust-and-foreign-codebases Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Tested-by: Arnaldo Carvalho de Melo Cc: Ian Rogers Cc: Namhyung Kim 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 jevents: Build support for generating metrics from python

2026-01-28T18:18:44+00:00

Generate extra-metrics.json and extra-metricgroups.json from python architecture specific scripts. The metrics themselves will be added in later patches. If a build takes place in tools/perf/ then extra-metrics.json and extra-metricgroups.json are generated in that directory and so added to .gitignore. If there is an OUTPUT directory then the tools/perf/pmu-events/arch files are copied to it so the generated extra-metrics.json and extra-metricgroups.json can be added/generated there. Signed-off-by: Ian Rogers Tested-by: Thomas Falcon Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Benjamin Gray Cc: Caleb Biggers Cc: Edward Baker Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Namhyung Kim Cc: Perry Taylor Cc: Peter Zijlstra Cc: Sandipan Das Cc: Weilin Wang Cc: Xu Yang Signed-off-by: Arnaldo Carvalho de Melo

perf help: Move common_cmds into builtin-help

2026-01-14T20:22:50+00:00

There's a lot of infrastructure for generating a relatively simple array used by one function. Move the array into the function and remove the supporting build logic. At the same time opportunistically const-ify the array. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Charlie Jenkins Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo