kernel/linux.git/tools/build, 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 ...

Merge tag 'trace-rtla-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-04-16T00:48:24+00:00

Pull RTLA updates from Steven Rostedt: - Simplify option parsing Auto-generate getopt_long() optstring for short options from long options array, avoiding the need to specify it manually and reducing the surface for mistakes. - Add unit tests Implement unit tests (make unit-tests) using libcheck, next to existing runtime tests (make check). Currently, three functions from utils.c are tested. - Add --stack-format option In addition to stopping stack pointer decoding (with -s/--stack option) on first unresolvable pointer, allow also skipping unresolvable pointers and displaying everything, configurable with a new option. - Unify number of CPUs into one global variable Use one global variable, nr_cpus, to store the number of CPUs instead of retrieving it and passing it at multiple places. - Fix behavior in various corner cases Make RTLA behave correctly in several corner cases: memory allocation failure, invalid value read from kernel side, thread creation failure, malformed time value input, and read/write failure or interruption by signal. - Improve string handling Simplify several places in the code that handle strings, including parsing of action arguments. A few new helper functions and variables are added for that purpose. - Get rid of magic numbers Few places handling paths use a magic number of 1024. Replace it with MAX_PATH and ARRAY_SIZE() macro. - Unify threshold handling Code that handles response to latency threshold is duplicated between tools, which has led to bugs in the past. Unify it into a new helper as much as possible. - Fix segfault on SIGINT during cleanup The SIGINT handler touches dynamically allocated memory. Detach it before freeing it during cleanup to prevent segmentation fault and discarding of output buffers. Also, properly document SIGINT handling while at it. * tag 'trace-rtla-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (28 commits) Documentation/rtla: Document SIGINT behavior rtla: Fix segfault on multiple SIGINTs rtla/utils: Fix loop condition in PID validation rtla/utils: Fix resource leak in set_comm_sched_attr() rtla/trace: Fix I/O handling in save_trace_to_file() rtla/trace: Fix write loop in trace_event_save_hist() rtla/timerlat: Simplify RTLA_NO_BPF environment variable check rtla: Use str_has_prefix() for option prefix check rtla: Enforce exact match for time unit suffixes rtla: Use str_has_prefix() for prefix checks rtla: Add str_has_prefix() helper function rtla: Handle pthread_create() failure properly rtla/timerlat: Add bounds check for softirq vector rtla: Simplify code by caching string lengths rtla: Replace magic number with MAX_PATH rtla: Introduce common_threshold_handler() helper rtla/actions: Simplify argument parsing rtla: Use strdup() to simplify code rtla: Exit on memory allocation failures during initialization tools/rtla: Remove unneeded nr_cpus from for_each_monitored_cpu ...

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 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

tools build: Make in-target rule robust against too long argument error

2026-03-04T14:21:48+00:00

The command length of in-target scales with the depth of the directory times the number of objects in the Makefile. When there are many objects, and O=[absolute_path] is set, and the absolute_path is relatively long. It is possible that this line "$(call if_changed,$(host)ld_multi)" will report error: "make[4]: /bin/sh: Argument list too long" For example, build perf tools with O=/long/output/path Like built-in.a and *.mod rules in scripts/Makefile.build, add $(objpredix)/ by the shell command instead of by Make's builtin function. Reviewed-by: Ian Rogers Signed-off-by: Changqing Li Cc: Charlie Jenkins Cc: James Clark Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

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: Fix rust feature detection

2026-02-09T14:10:56+00:00

Features in FEATURE_TESTS_BASIC will be set as being available if test-all.c builds, so since the rust test isn't included in test-all.c, we can't have 'rust' in there, remove it from FEATURE_TESTS_BASIC and use feature-check so that it tries to build test-rust.bin, doing the actual feature detection. On a system lacking a rust compiler: Makefile.config:1158: Rust is not found. Test workloads with rust are disabled. Auto-detecting system features: ... libdw: [ on ] ... glibc: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... numa_num_possible_cpus: [ on ] ... libpython: [ on ] ... libcapstone: [ on ] ... llvm-perf: [ on ] ... zlib: [ on ] ... lzma: [ on ] ... bpf: [ on ] ... libaio: [ on ] ... libzstd: [ on ] ... libopenssl: [ on ] ... rust: [ OFF ] $ cat /tmp/build/perf-tools-next/feature/test-rust.make.output /bin/sh: line 1: rustc: command not found $ file /tmp/build/perf-tools-next/feature/test-rust.bin /tmp/build/perf-tools-next/feature/test-rust.bin: cannot open `/tmp/build/perf-tools-next/feature/test-rust.bin' (No such file or directory) $ $ perf -vv | grep RUST rust: [ OFF ] # HAVE_RUST_SUPPORT $ And after installing it: ... rust: [ on ] $ cat /tmp/build/perf-tools-next/feature/test-rust.make.output $ file /tmp/build/perf-tools-next/feature/test-rust.bin /tmp/build/perf-tools-next/feature/test-rust.bin: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=9c416edf673ee3705b97bae893a99a6fcf1ee258, for GNU/Linux 3.2.0, with debug_info, not stripped $ $ perf -vv | grep RUST rust: [ on ] # HAVE_RUST_SUPPORT $ Fixes: 6a32fa5ccd33da5d ("tools build: Add a feature test for rust compiler") Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo