kernel/tools/perf/tests, branch linux-6.16.y

perf tests bp_account: Fix leaked file descriptor

2025-08-15T14:39:07Z

[ Upstream commit 4a6cdecaa1497f1fbbd1d5307a225b6ca5a62a90 ] Since the commit e9846f5ead26 ("perf test: In forked mode add check that fds aren't leaked"), the test "Breakpoint accounting" reports the error: # perf test -vvv "Breakpoint accounting" 20: Breakpoint accounting: --- start --- test child forked, pid 373 failed opening event 0 failed opening event 0 watchpoints count 4, breakpoints count 6, has_ioctl 1, share 0 wp 0 created wp 1 created wp 2 created wp 3 created wp 0 modified to bp wp max created ---- end(0) ---- Leak of file descriptor 7 that opened: 'anon_inode:[perf_event]' A watchpoint's file descriptor was not properly released. This patch fixes the leak. Fixes: 032db28e5fa3 ("perf tests: Add breakpoint accounting/modify test") Reported-by: Aishwarya TCV Signed-off-by: Leo Yan Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250711-perf_fix_breakpoint_accounting-v1-1-b314393023f9@arm.com Signed-off-by: Namhyung Kim Signed-off-by: Sasha Levin

perf test: Directory file descriptor leak

2025-06-17T21:29:42Z

Add missed close when iterating over the script directories. Fixes: f3295f5b067d3c26 ("perf tests: Use scandirat for shell script finding") Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ingo Molnar Cc: Jiapeng Chong Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Tiezhu Yang Link: https://lore.kernel.org/r/20250614004108.1650988-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Restrict uniquifying test to machines with 'uncore_imc'

2025-06-16T17:05:10Z

The test would fail if target machine does not have 'uncore_imc' devices. Since event uniquifying behavior is similar among different architectures, we are restricting the test to only run on machines with `uncore_imc` devices. Suggested-by: Ian Rogers Signed-off-by: Chun-Tse Shao Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20250521224513.1104129-1-ctshao@google.com [ Skip the test, i.e. return 2, instead of returning 0 as if the test had succeed ] Signed-off-by: Arnaldo Carvalho de Melo

perf test trace_summary: Skip --bpf-summary tests if no libbpf

2025-05-28T13:12:47Z

If perf is built without libbpf (e.g. NO_LIBBPF=1) then the --bpf-summary perf trace tests will fail. Skip the tests as this is expected behavior. Signed-off-by: Ian Rogers Acked-by: Howard Chu Cc: Adrian Hunter Cc: Alex Gaynor Cc: Alexander Shishkin Cc: Alice Ryhl Cc: Andi Kleen Cc: Andreas Hindborg Cc: Benno Lossin Cc: Björn Roy Baron Cc: Boqun Feng Cc: Danilo Krummrich Cc: Dmitriy Vyukov Cc: Gary Guo Cc: Ingo Molnar Cc: James Clark Cc: Jiapeng Chong Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephen Brennan Cc: Trevor Gross Cc: Weilin Wang Link: https://lore.kernel.org/r/20250528032637.198960-7-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test intel-pt: Skip jitdump test if no libelf

2025-05-28T13:12:47Z

jitdump support is only present if building with libelf. Skip the intel-pt jitdump test if perf isn't compiled with libelf support. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alex Gaynor Cc: Alexander Shishkin Cc: Alice Ryhl Cc: Andi Kleen Cc: Andreas Hindborg Cc: Benno Lossin Cc: Björn Roy Baron Cc: Boqun Feng Cc: Danilo Krummrich Cc: Dmitriy Vyukov Cc: Gary Guo Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiapeng Chong Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephen Brennan Cc: Trevor Gross Cc: Weilin Wang Link: https://lore.kernel.org/r/20250528032637.198960-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test demangle-java: Don't segv if demangling fails

2025-05-28T13:12:47Z

The buffer returned by dso__demangle_sym() may be NULL, don't segv in strcmp if this happens. Currently this happens for NO_LIBELF=1 builds. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alex Gaynor Cc: Alexander Shishkin Cc: Alice Ryhl Cc: Andi Kleen Cc: Andreas Hindborg Cc: Benno Lossin Cc: Björn Roy Baron Cc: Boqun Feng Cc: Danilo Krummrich Cc: Dmitriy Vyukov Cc: Gary Guo Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiapeng Chong Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephen Brennan Cc: Trevor Gross Cc: Weilin Wang Link: https://lore.kernel.org/r/20250528032637.198960-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Factor creating a "live" machine out of dwarf-unwind

2025-05-28T12:24:59Z

Factor out for use in places other than the dwarf unwinding tests for libunwind. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Anne Macedo Cc: Dmitriy Vyukov Cc: Dr. David Alan Gilbert Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Yicong Yang Link: https://lore.kernel.org/r/20250313052952.871958-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add AMD IBS sw filter test

2025-05-27T21:07:02Z

The kernel v6.14 added 'swfilt' to support privilege filtering in software so that IBS can be used by regular users. Add a test case in x86 to verify the behavior. $ sudo perf test -vv 'IBS software filter' 113: AMD IBS software filtering: --- start --- test child forked, pid 178826 check availability of IBS swfilt run perf record with modifier and swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 0 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] check number of samples with swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.037 MB - ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.041 MB - ] ---- end(0) ---- 113: AMD IBS software filtering : Ok Reviewed-by: Ravi Bangoria Signed-off-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo # On a 9950x3d Cc: Adrian Hunter Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20250524002754.1266681-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tests switch-tracking: Fix timestamp comparison

2025-05-24T14:40:47Z

The test might fail on the Arm64 platform with the error: # perf test -vvv "Track with sched_switch" Missing sched_switch events # The issue is caused by incorrect handling of timestamp comparisons. The comparison result, a signed 64-bit value, was being directly cast to an int, leading to incorrect sorting for sched events. The case does not fail everytime, usually I can trigger the failure after run 20 ~ 30 times: # while true; do perf test "Track with sched_switch"; done 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : FAILED! 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : FAILED! 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok I used cross compiler to build Perf tool on my host machine and tested on Debian / Juno board. Generally, I think this issue is not very specific to GCC versions. As both internal CI and my local env can reproduce the issue. My Host Build compiler: # aarch64-linux-gnu-gcc --version aarch64-linux-gnu-gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0 Juno Board: # lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 12 (bookworm) Release: 12 Codename: bookworm Fix this by explicitly returning 0, 1, or -1 based on whether the result is zero, positive, or negative. Fixes: d44bc558297222d9 ("perf tests: Add a test for tracking with sched_switch") Reviewed-by: Ian Rogers Signed-off-by: Leo Yan Cc: Adrian Hunter Cc: James Clark Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/r/20250331172759.115604-1-leo.yan@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests trace_summary.sh: Run in exclusive mode

2025-05-23T01:24:58Z

And it is being successfull only when running alone, probably because there are some tests that add the vfs_getname probe that gets used by 'perf trace' and alter how it does syscall arg pathname resolution. This should be removed or made a fallback to the preferred BPF mode of getting syscall parameters, but till then, run this in exclusive mode. For reference, here are some of the tests that run close to this one: 127: perf record offcpu profiling tests : Ok 128: perf all PMU test : Ok 129: perf stat --bpf-counters test : Ok 130: Check Arm CoreSight trace data recording and synthesized samples: Skip 131: Check Arm CoreSight disassembly script completes without errors : Skip 132: Check Arm SPE trace data recording and synthesized samples : Skip 133: Test data symbol : Ok 134: Miscellaneous Intel PT testing : Skip 135: test Intel TPEBS counting mode : Skip 136: perf script task-analyzer tests : Ok 137: Check open filename arg using perf trace + vfs_getname : Ok 138: perf trace summary : Ok Cc: Adrian Hunter Cc: Howard Chu Cc: Ian Rogers Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/r/aC-hHTgArwlF_zu9@x1 Signed-off-by: Arnaldo Carvalho de Melo