kernel/linux.git/tools/build/feature, branch master

Merge tag 'perf-tools-for-v7.1-2026-04-17' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2026-04-18T16:24:56+00:00

Pull perf tools updates from Namhyung Kim: "perf report: - Add 'comm_nodigit' sort key to combine similar threads that only have different numbers in the comm. In the following example, the 'comm_nodigit' will have samples from all threads starting with "bpfrb/" into an entry "bpfrb/". $ perf report -s comm_nodigit,comm -H ... # # Overhead CommandNoDigit / Command # ........... ........................ # 20.30% swapper 20.30% swapper 13.37% chrome 13.37% chrome 10.07% bpfrb/ 7.47% bpfrb/0 0.70% bpfrb/1 0.47% bpfrb/3 0.46% bpfrb/2 0.25% bpfrb/4 0.23% bpfrb/5 0.20% bpfrb/6 0.14% bpfrb/10 0.07% bpfrb/7 - Support flat layout for symfs. The --symfs option is to specify the location of debugging symbol files. The default 'hierarchy' layout would search the symbol file using the same path of the original file under the symfs root. The new 'flat' layout would search only in the root directory. - Update 'simd' sort key for ARM SIMD flags to cover ASE/SME and more predicate flags. perf stat: - Add --pmu-filter option to select specific PMUs. This would be useful when you measure metrics from multiple instance of uncore PMUs with similar names. # perf stat -M cpa_p0_avg_bw Performance counter stats for 'system wide': 19,417,779,115 hisi_sicl0_cpa0/cpa_cycles/ # 0.00 cpa_p0_avg_bw 0 hisi_sicl0_cpa0/cpa_p0_wr_dat/ 0 hisi_sicl0_cpa0/cpa_p0_rd_dat_64b/ 0 hisi_sicl0_cpa0/cpa_p0_rd_dat_32b/ 19,417,751,103 hisi_sicl10_cpa0/cpa_cycles/ # 0.00 cpa_p0_avg_bw 0 hisi_sicl10_cpa0/cpa_p0_wr_dat/ 0 hisi_sicl10_cpa0/cpa_p0_rd_dat_64b/ 0 hisi_sicl10_cpa0/cpa_p0_rd_dat_32b/ 19,417,730,679 hisi_sicl2_cpa0/cpa_cycles/ # 0.31 cpa_p0_avg_bw 75,635,749 hisi_sicl2_cpa0/cpa_p0_wr_dat/ 18,520,640 hisi_sicl2_cpa0/cpa_p0_rd_dat_64b/ 0 hisi_sicl2_cpa0/cpa_p0_rd_dat_32b/ 19,417,674,227 hisi_sicl8_cpa0/cpa_cycles/ # 0.00 cpa_p0_avg_bw 0 hisi_sicl8_cpa0/cpa_p0_wr_dat/ 0 hisi_sicl8_cpa0/cpa_p0_rd_dat_64b/ 0 hisi_sicl8_cpa0/cpa_p0_rd_dat_32b/ 19.417734480 seconds time elapsed With --pmu-filter, users can select only hisi_sicl2_cpa0 PMU. # perf stat --pmu-filter hisi_sicl2_cpa0 -M cpa_p0_avg_bw Performance counter stats for 'system wide': 6,234,093,559 cpa_cycles # 0.60 cpa_p0_avg_bw 50,548,465 cpa_p0_wr_dat 7,552,182 cpa_p0_rd_dat_64b 0 cpa_p0_rd_dat_32b 6.234139320 seconds time elapsed Data type profiling: - Quality improvements by tracking register state more precisely - Ensure array members to get the type - Handle more cases for global variables Vendor event/metric updates: - Update various Intel events and metrics - Add NVIDIA Tegra 410 Olympus events Internal changes: - Verify perf.data header for maliciously crafted files - Update perf test to cover more usages and make them robust - Move a couple of copied kernel headers not to annoy objtool build - Fix a bug in map sorting in name order - Remove some unused codes Misc: - Fix module symbol resolution with non-zero text address - Add -t/--threads option to `perf bench mem mmap` - Track duration of exit*() syscall by `perf trace -s` - Add core.addr2line-timeout and core.addr2line-disable-warn config items" * tag 'perf-tools-for-v7.1-2026-04-17' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (131 commits) perf loongarch: Fix build failure with CONFIG_LIBDW_DWARF_UNWIND perf annotate: Use jump__delete when freeing LoongArch jumps perf test: Fixes for check branch stack sampling perf test: Fix inet_pton probe failure and unroll call graph perf build: fix "argument list too long" in second location perf header: Add sanity checks to HEADER_BPF_BTF processing perf header: Sanity check HEADER_BPF_PROG_INFO perf header: Sanity check HEADER_PMU_CAPS perf header: Sanity check HEADER_HYBRID_TOPOLOGY perf header: Sanity check HEADER_CACHE perf header: Sanity check HEADER_GROUP_DESC perf header: Sanity check HEADER_PMU_MAPPINGS perf header: Sanity check HEADER_MEM_TOPOLOGY perf header: Sanity check HEADER_NUMA_TOPOLOGY perf header: Sanity check HEADER_CPU_TOPOLOGY perf header: Sanity check HEADER_NRCPUS and HEADER_CPU_DOMAIN_INFO perf header: Bump up the max number of command line args allowed perf header: Validate nr_domains when reading HEADER_CPU_DOMAIN_INFO perf sample: Fix documentation typo perf arm_spe: Improve SIMD flags setting ...

tools build: Correct link flags for libopenssl

2026-03-26T21:21:56+00:00

The perf static build reports that the BPF skeleton is disabled due to the missing libopenssl feature. Use PKG_CONFIG to determine the link flags for libopenssl. Add "--static" to the PKG_CONFIG command for static linking. Fixes: 7678523109d1 ("tools/build: Add a feature test for libopenssl") Signed-off-by: Leo Yan Signed-off-by: Namhyung Kim

tools/build: Add feature test for libcheck

2026-03-04T14:51:56+00:00

Enable support for unit tests in rtla. Note that the pkg-config file for libcheck is named check.pc. Signed-off-by: Costa Shulyupin Link: https://lore.kernel.org/r/20260119105857.797498-2-costa.shul@redhat.com Signed-off-by: Tomas Glozar

tools build: Fix feature test for rust compiler

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

Currently a dummy rust code is compiled to detect if the rust feature could be enabled. It turns out that in this case rust emits a dependency file without any external references: /perf/feature/test-rust.d: test-rust.rs /perf/feature/test-rust.bin: test-rust.rs test-rust.rs: This can lead to a situation, when rustc was removed after a successful build, but the build process still thinks it's there and the feature is enabled on subsequent runs. Instead simply check the compiler presence to detect the feature, as suggested by Arnaldo. This way no actual test-rust.bin will be created, meaning the feature check will not be cached and always performed. That's exactly what we want, and the overhead of doing this every time is minimal. Tested with multiple rounds of install/remove of the rust package. Reported-by: Arnaldo Carvalho de Melo Suggested-by: Arnaldo Carvalho de Melo Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Tested-by: Arnaldo Carvalho de Melo Cc: Ian Rogers Cc: Miguel Ojeda Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

tools build: Emit dependencies file for test-rust.bin

2026-02-10T12:29:58+00:00

Test it first by having rust installed, then removing it and building again. Fixes: 6a32fa5ccd33da5d ("tools build: Add a feature test for rust compiler") Signed-off-by: Dmitry Dolgov <9erthalion6@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo

tools build: Make test-rust.bin be removed by the 'clean' target

2026-02-10T12:29:39+00:00

test-rust.bin is missing from the list of FILES, and thus is not removed by the clean target. This could lead to a false feature detection, since the binary stays there. Fix it. Fixes: 6a32fa5ccd33da5d ("tools build: Add a feature test for rust compiler") Tested-by: Arnaldo Carvalho de Melo Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add a feature test for rust compiler

2026-02-08T14:30:45+00:00

Add a feature test to identify if the rust compiler is available, so that perf could build rust based worloads based on that. Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Ian Rogers Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf build: Feature test for libbfd thread safety API

2026-01-06T22:14:46+00:00

The non-distro build requires libbfd 2.42 since commit b72b8132d8fd ("perf libbfd: Ensure libbfd is initialized prior to use"). Add a feature test so that it's obvious why the build fails if this criteria isn't met. 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 unused libbfd-buildid feature test

2026-01-06T22:14:00+00:00

HAVE_LIBBFD_BUILDID_SUPPORT isn't used in the codebase so remove the feature test that sets it. 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

tools build: Fix the common set of features test wrt libopenssl

2025-12-28T04:26:44+00:00

The recent introduction of the libopenssl feature test forgot to add the -lssl to the test-all.o target, which made it always fail, fix it. Noticed by looking at this file after building: $ cat /tmp/build/perf-tools/feature/test-all.make.output /usr/bin/ld: /tmp/ccBhO8WH.ltrans0.ltrans.o: in function `main': /home/acme/git/perf-tools/tools/build/feature/test-libopenssl.c:6:(.text.startup+0x2ed): undefined reference to `OPENSSL_init_ssl' collect2: error: ld returned 1 exit status $ It was added only to the individual ssl test, that works: $ cat /tmp/build/perf-tools/feature/test-libopenssl.make.output $ ldd /tmp/build/perf-tools/feature/test-libopenssl.bin | grep ssl libssl.so.3 => /usr/lib64/libssl.so.3 (0x00007fb81eda8000) $ Fixes: 7678523109d1d9ee ("tools/build: Add a feature test for libopenssl") Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim