kernel/tools/perf/tests/tests.h, branch master

perf test workload: Add code_with_type test workload

2026-02-08T22:16:24Z

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 test workload: Add inlineloop test workload

2026-01-12T19:11:15Z

The purpose of this workload is to gather samples in an inlined function. This can be used to test whether inlined addr2line works correctly. Committer testing: $ perf record perf test -w inlineloop 1 [ perf record: Woken up 2 times to write data ] [ perf record: Captured and wrote 0.161 MB perf.data (4005 samples) ] $ perf report --stdio --dso perf -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 # $ 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 test: Add kallsyms split test

2025-12-03T05:59:15Z

Create a fake root directory for /proc/{version,modules,kallsyms} in /tmp for testing. The kallsyms has a bad symbol in the module and it causes the main map splitted. The test ensures it only has two maps - kernel and the module and it finds the initial map after the module without creating the split maps like [kernel].0 and so on. $ perf test -vv "split kallsyms" 69: split kallsyms: --- start --- test child forked, pid 1016196 try to create fake root directory create kernel maps from the fake root directory maps__set_modules_path_dir: cannot open /tmp/perf-test.Zrv6Sy/lib/modules/X.Y.Z dir Problems setting modules path maps, continuing anyway... Failed to open /tmp/perf-test.Zrv6Sy/proc/kcore. Note /proc/kcore requires CAP_SYS_RAWIO capability to access. Using /tmp/perf-test.Zrv6Sy/proc/kallsyms for symbols kernel map loaded - check symbol and map ---- end(0) ---- 69: split kallsyms : Ok Reviewed-by: Ian Rogers Signed-off-by: Namhyung Kim

perf test maps: Additional maps__fixup_overlap_and_insert tests

2025-11-20T00:20:15Z

Add additional test to the maps covering maps__fixup_overlap_and_insert. Change the test suite to be for more than just 1 test. Signed-off-by: Ian Rogers Reviewed-by: James Clark Signed-off-by: Namhyung Kim

perf test: Remove C python_use test

2025-10-01T19:59:11Z

Removed in favor of the shell script version. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Collin Funk Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Signed-off-by: Arnaldo Carvalho de Melo

perf test: Extend branch stack sampling test for Arm64 BRBE

2025-10-01T18:31:49Z

BRBE emits IRQ and ERET branches for branching and returning from trapped instructions. Add a test that loops on a trapped instruction (MRS - Read special register) for this. Extend the expected 'any_call' branches to include FAULT_DATA and FAULT_INST as these are emitted by BRBE. Reviewed-by: Ian Rogers Co-developed-by: German Gomez Signed-off-by: German Gomez Signed-off-by: James Clark Cc: Adam Young Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Anshuman Khandual Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Rob Herring Cc: Will Deacon Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add libsubcmd help tests

2025-07-01T22:51:55Z

Add a set of tests for subcmd routines. Currently it fails the last one since there's a bug. It'll be fixed by the next commit. $ perf test subcmd 69: libsubcmd help tests : 69.1: Load subcmd names : Ok 69.2: Uniquify subcmd names : Ok 69.3: Exclude duplicate subcmd names : FAILED! Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250701201027.1171561-2-namhyung@kernel.org Signed-off-by: Namhyung Kim

perf test: Expand user space event reading (rdpmc) tests

2025-06-20T20:14:07Z

Test that disabling rdpmc support via /sys/bus/event_source/cpu*/rdpmc disables reading in the mmap (libperf read support will fallback to using a system call). Test all hybrid PMUs support rdpmc. Ensure hybrid PMUs use the correct CPU to rdpmc the correct event. Previously the test would open cycles or instructions with no extended type then rdpmc it on whatever CPU. This could fail/skip due to which CPU the test was scheduled upon. Signed-off-by: Ian Rogers Reviewed-by: Kan Liang Link: https://lore.kernel.org/r/20250614004528.1652860-1-irogers@google.com Signed-off-by: Namhyung Kim

perf test demangle-rust: Add Rust demangling test

2025-05-09T20:01:57Z

The test cases are listed examples in: https://doc.rust-lang.org/rustc/symbol-mangling/v0.html This test was previously part of a different Rust v0 demangler: https://lore.kernel.org/lkml/20250129193037.573431-1-irogers@google.com/ Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alex Gaynor Cc: Alexander Shishkin Cc: Alice Ryhl Cc: Andreas Hindborg Cc: Ariel Ben-Yehuda Cc: Benno Lossin Cc: Bill Wendling Cc: Björn Roy Baron Cc: Boqun Feng Cc: Daniel Xu Cc: Danilo Krummrich Cc: Gary Guo Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiapeng Chong Cc: Jiri Olsa Cc: Justin Stitt Cc: Kan Liang Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Stephen Brennan Cc: Trevor Gross Link: https://lore.kernel.org/r/20250430004128.474388-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Introduce DEFINE_SUITE_EXCLUSIVE()

2024-12-13T19:55:09Z

A variant of DEFINE_SUITE() but sets ->exclusive bit for the test so the test will be executed sequentially. Signed-off-by: Ravi Bangoria Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ananth Narayan Cc: Borislav Petkov Cc: Dave Hansen Cc: H. Peter Anvin Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sandipan Das Cc: Santosh Shukla Cc: Stephane Eranian Cc: Thomas Gleixner Cc: x86@kernel.org Link: https://lore.kernel.org/r/20241210093449.1662-10-ravi.bangoria@amd.com Signed-off-by: Arnaldo Carvalho de Melo