kernel/linux.git/tools/perf/util/config.c, branch linux-7.1.y

perf addr2line: Remove global variable addr2line_timeout_ms

2026-04-08T17:28:49+00:00

Remove global variable addr2line_timeout_ms and add it as a member to symbol_conf structure. Signed-off-by: Thomas Richter Reviewed-by: Ian Rogers [namhyung: move the initialization to util/symbol.c] Signed-off-by: Namhyung Kim

perf config: Make symbol_conf::addr2line_disable_warn configurable

2026-04-08T17:28:49+00:00

Make symbol_conf::addr2line_disable_warn configurable by reading the perfconfig file. Use section core and addr2line-disable-warn = value. Update documentation. Example: # perf config -l core.addr2line-timeout=5000 core.addr2line-disable-warn=1 # Signed-off-by: Thomas Richter Reviewed-by: Ian Rogers Suggested-by: Namhyung Kim Signed-off-by: Namhyung Kim

perf srcline: Add configuration support for the addr2line style

2026-01-13T19:09:14+00:00

Allow the addr2line style to be specified on the `perf report` command line or in the .perfconfig file. Committer testing: The methods: # perf probe -x ~/bin/perf -F *__addr2line cmd__addr2line libbfd__addr2line libdw__addr2line llvm__addr2line # So if we configure one of them, say 'addr2line': # perf config addr2line.style=addr2line # perf config addr2line.style addr2line.style=addr2line # And have probes on all of them: # perf probe -x ~/bin/perf *__addr2line Added new events: probe_perf:cmd__addr2line (on *__addr2line in /home/acme/bin/perf) probe_perf:llvm__addr2line (on *__addr2line in /home/acme/bin/perf) probe_perf:libbfd__addr2line (on *__addr2line in /home/acme/bin/perf) probe_perf:libdw__addr2line (on *__addr2line in /home/acme/bin/perf) You can now use it in all perf tools, such as: perf record -e probe_perf:libdw__addr2line -aR sleep 1 # Only the selected method should be used: # perf stat -e probe_perf:*_addr2line perf report -f --dso perf --stdio -s srcfile,srcline # Total Lost Samples: 0 # # Samples: 4K of event 'cpu/cycles/Pu' # Event count (approx.): 5535180842 # # Overhead Source File Source:Line # ........ ............ ............... # 99.04% inlineloop.c inlineloop.c:21 0.46% inlineloop.c inlineloop.c:20 # # (Tip: For hierarchical output, try: perf report --hierarchy) # Performance counter stats for 'perf report -f --dso perf --stdio -s srcfile,srcline': 44 probe_perf:cmd__addr2line 0 probe_perf:llvm__addr2line 0 probe_perf:libbfd__addr2line 0 probe_perf:libdw__addr2line 0.035915611 seconds time elapsed 0.028008000 seconds user 0.009051000 seconds sys # I checked and that is the case for the other methods. Also when using: # perf config addr2line.style=libdw,llvm Performance counter stats for 'perf report -f --dso perf --stdio -s srcfile,srcline': 0 probe_perf:cmd__addr2line 23 probe_perf:llvm__addr2line 0 probe_perf:libbfd__addr2line 44 probe_perf:libdw__addr2line Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Howard Chu Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephen Brennan Cc: Tony Jones Signed-off-by: Arnaldo Carvalho de Melo

perf stat: Reduce scope of walltime_nsecs_stats

2025-11-18T02:43:09+00:00

walltime_nsecs_stats is no longer used for counter values, move into that stat_config where it controls certain things like noise measurement. Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf stat: Reduce scope of ru_stats

2025-11-18T02:43:09+00:00

The ru_stats are used to capture user and system time stats when a process exits. These are then applied to user and system time tool events if their reads fail due to the process terminating. Reduce the scope now the metric code no longer reads these values. Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf srcline: Fallback between addr2line implementations

2025-10-06T19:47:49+00:00

Factor the addr2line function implementation into separate source files (addr2line.[ch]) and rename the addr2line function cmd__addr2line. In srcline replace the ifdef-ed addr2line implementations with one that first tries the llvm__addr2line implementation, then the deprecated libbfd__addr2line function and on failure uses cmd__addr2line. If HAVE_LIBLLVM_SUPPORT is enabled the llvm__addr2line will execute against the libLLVM.so it is linked against. If HAVE_LIBLLVM_DYNAMIC is enabled then libperf-llvm.so (that links against libLLVM.so) will be dlopened. If the dlopen succeeds then the behavior should match HAVE_LIBLLVM_SUPPORT. On failure cmd__addr2line is used. The dlopen is only tried once. If HAVE_LIBLLVM_DYNAMIC isn't enabled then llvm__addr2line immediately fails and cmd__addr2line is used. Clean up the dso__free_a2l logic, which is only needed in the non-LLVM version and moved to addr2line.c. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Andi Kleen Cc: Athira Rajeev Cc: Bill Wendling Cc: Charlie Jenkins Cc: Collin Funk Cc: Dmitriy Vyukov Cc: Dr. David Alan Gilbert Cc: Eric Biggers Cc: Haibo Xu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Justin Stitt Cc: Li Huafei Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Song Liu Cc: Stephen Brennan Signed-off-by: Arnaldo Carvalho de Melo

perf util: Remove unused perf_config__refresh

2025-03-10T18:31:24+00:00

perf_config__refresh() was added in 2016 by commit 8a0a9c7e9146 ("perf config: Introduce new init() and exit()") but has remained unused. Remove it. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250305023120.155420-7-linux@treblig.org Signed-off-by: Namhyung Kim

perf stat: Move stat_config into config.c

2024-12-18T19:24:32+00:00

stat_config is accessed by config.c via helper functions, but declared in builtin-stat. Move to util/config.c so that stub functions aren't needed in python.c which doesn't link against the builtin files. To avoid name conflicts change builtin-script to use the same stat_config as builtin-stat. Rename local variables in tests to avoid shadow declaration warnings. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Acked-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Athira Rajeev Cc: Colin Ian King Cc: Dapeng Mi Cc: Howard Chu Cc: Ilya Leoshkevich Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Josh Poimboeuf Cc: Kan Liang Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Richter Cc: Veronika Molnarova Cc: Weilin Wang Link: https://lore.kernel.org/r/20241119011644.971342-9-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Add function to get a config value

2024-09-24T18:47:03+00:00

This can be used to get config values like which objdump Perf uses for disassembly. Reviewed-by: Leo Yan Signed-off-by: James Clark Tested-by: Ganapatrao Kulkarni Cc: Ben Gainey Cc: Suzuki K Poulose Cc: Will Deacon Cc: Mathieu Poirier Cc: Mike Leach Cc: Ruidong Tian Cc: Leo Yan Cc: Benjamin Gray Cc: linux-arm-kernel@lists.infradead.org Cc: coresight@lists.linaro.org Cc: John Garry Cc: scclevenger@os.amperecomputing.com Link: https://lore.kernel.org/r/20240916135743.1490403-4-james.clark@linaro.org Signed-off-by: Namhyung Kim

perf parse-events: Remove BPF event support

2023-08-15T19:41:48+00:00

New features like the BPF --filter support in perf record have made the BPF event functionality somewhat redundant. As shown by commit fcb027c1a4f6 ("perf tools: Revert enable indices setting syntax for BPF map") and commit 14e4b9f4289a ("perf trace: Raw augmented syscalls fix libbpf 1.0+ compatibility") the BPF event support hasn't been well maintained and it adds considerable complexity in areas like event parsing, not least as '/' is a separator for event modifiers as well as in paths. This patch removes support in the event parser for BPF events and then the associated functions are removed. This leads to the removal of whole source files like bpf-loader.c. Removing support means that augmented syscalls in perf trace is broken, this will be fixed in a later commit adding support using BPF skeletons. The removal of BPF events causes an unused label warning from flex generated code, so update build to ignore it: ``` util/parse-events-flex.c:2704:1: error: label ‘find_rule’ defined but not used [-Werror=unused-label] 2704 | find_rule: /* we branch to this label when backing up */ ``` Committer notes: Extracted from a larger patch that was also removing the support for linking with libllvm and libclang, that were an alternative to using an external clang execution to compile the .c event source code into BPF bytecode. Testing it: # perf trace -e /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c event syntax error: '/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c' \___ Bad event or PMU Unabled to find PMU or event on a PMU of 'home' Initial error: event syntax error: '/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c' \___ Cannot find PMU `home'. Missing kernel support? Run 'perf list' for a list of valid events Usage: perf trace [] [] or: perf trace [] -- [] or: perf trace record [] [] or: perf trace record [] -- [] -e, --event event/syscall selector. use 'perf list' to list available events # Signed-off-by: Ian Rogers Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andrii Nakryiko Cc: Anshuman Khandual Cc: Athira Rajeev Cc: Brendan Gregg Cc: Carsten Haitzler Cc: Eduard Zingerman Cc: Fangrui Song Cc: He Kuang Cc: Ingo Molnar Cc: James Clark Cc: Kan Liang Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Naveen N. Rao Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Cc: Tiezhu Yang Cc: Tom Rix Cc: Wang Nan Cc: Wang ShaoBo Cc: Yang Jihong Cc: Yonghong Song Cc: YueHaibing Cc: bpf@vger.kernel.org Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230810184853.2860737-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Arnaldo Carvalho de Melo