linux.git/tools/perf/tests, branch v6.12.80

perf test stat tests: Fix for virtualized machines

2026-03-04T12:20:49+00:00

[ Upstream commit e272628902c1c96731e2d9f62a7fc77767686eb0 ]

On s390 'perf test's 'perf stat tests', subtest test_hybrid fails for
z/VM systems.  The root cause is this statement:

  $(perf stat -a -- sleep 0.1 2>&1 |\
                  grep -E "/cpu-cycles/[uH]*|  cpu-cycles[:uH]* -c)

The 'perf stat' output on a s390 z/VM system is

  # perf stat -a -- sleep 0.1 2>&1
  Performance counter stats for 'system wide':

        56      context-switches  #     46.3 cs/sec  cs_per_second
  1,210.41 msec cpu-clock         #     11.9 CPUs  CPUs_utilized
        12      cpu-migrations    #      9.9 migrations/sec ...
        81      page-faults       #     66.9 faults/sec ...

        0.100891009 seconds time elapsed

The grep command does not match any single line and exits with error
code 1.

As the bash script is executed with 'set -e', it aborts with the first
error code being non-zero.

Fix this and use 'wc -l' to count matching lines instead of 'grep ... -c'.

Output before:

  # perf test 102
  102: perf stat tests                      : FAILED!
  #

Output after:

  # perf test 102
  102: perf stat tests                      : Ok
  #

Fixes: bb6e7cb11d97ce19 ("perf tools: Add fallback for exclude_guest")
Reviewed-by: Ian Rogers 
Reviewed-by: James Clark 
Signed-off-by: Thomas Richter 
Cc: Alexander Gordeev 
Cc: Heiko Carstens 
Cc: Jan Polensky 
Cc: linux-s390@vger.kernel.org
Cc: Namhyung Kim 
Cc: Sumanth Korikkar 
Cc: Vasily Gorbik 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

perf test stat: Update test expectations and events

2026-03-04T12:20:49+00:00

[ Upstream commit a48cd551d7436be3b1bd65c63a6d00163f7e7706 ]

test_stat_record_report and test_stat_record_script used default
output which triggers a bug when sending metrics. As this isn't
relevant to the test switch to using named software events.

Update the match in test_hybrid as the cycles event is now cpu-cycles
to workaround potential ARM issues.

Signed-off-by: Ian Rogers 
Signed-off-by: Namhyung Kim 
Stable-dep-of: e272628902c1 ("perf test stat tests: Fix for virtualized machines")
Signed-off-by: Sasha Levin

perf test stat: Avoid hybrid assumption when virtualized

2025-10-19T14:34:06+00:00

commit f9c506fb69bdcfb9d7138281378129ff037f2aa1 upstream.

The cycles event will fallback to task-clock in the hybrid test when
running virtualized. Change the test to not fail for this.

Fixes: 65d11821910bd910 ("perf test: Add a test for default perf stat command")
Reviewed-by: James Clark 
Signed-off-by: Ian Rogers 
Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/r/20241212173354.9860-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Greg Kroah-Hartman

perf tools: Add fallback for exclude_guest

2025-10-19T14:33:37+00:00

[ Upstream commit bb6e7cb11d97ce1957894d30d13bfad3e8bfefe9 ]

Commit 7b100989b4f6bce70 ("perf evlist: Remove __evlist__add_default")
changed to parse "cycles:P" event instead of creating a new cycles
event for perf record.  But it also changed the way how modifiers are
handled so it doesn't set the exclude_guest bit by default.

It seems Apple M1 PMU requires exclude_guest set and returns EOPNOTSUPP
if not.  Let's add a fallback so that it can work with default events.

Also update perf stat hybrid tests to handle possible u or H modifiers.

Reviewed-by: Ian Rogers 
Reviewed-by: James Clark 
Reviewed-by: Ravi Bangoria 
Acked-by: Kan Liang 
Cc: James Clark 
Cc: Atish Patra 
Cc: Mingwei Zhang 
Cc: Kajol Jain 
Cc: Thomas Richter 
Cc: Palmer Dabbelt 
Link: https://lore.kernel.org/r/20241016062359.264929-2-namhyung@kernel.org
Fixes: 7b100989b4f6bce70 ("perf evlist: Remove __evlist__add_default")
Signed-off-by: Namhyung Kim 
Stable-dep-of: 24937ee839e4 ("perf evsel: Ensure the fallback message is always written to")
Signed-off-by: Sasha Levin

perf test: Add a test for default perf stat command

2025-10-19T14:33:37+00:00

[ Upstream commit 65d11821910bd910a2b4b5b005360d036c76ecef ]

Test that one cycles event is opened for each core PMU when "perf stat"
is run without arguments.

The event line can either be output as "pmu/cycles/" or just "cycles" if
there is only one PMU. Include 2 spaces for padding in the one PMU case
to avoid matching when the word cycles is included in metric
descriptions.

Acked-by: Namhyung Kim 
Acked-by: Kan Liang 
Signed-off-by: James Clark 
Cc: Yang Jihong 
Cc: Dominique Martinet 
Cc: Colin Ian King 
Cc: Howard Chu 
Cc: Ze Gao 
Cc: Yicong Yang 
Cc: Weilin Wang 
Cc: Will Deacon 
Cc: Mike Leach 
Cc: Jing Zhang 
Cc: Yang Li 
Cc: Leo Yan 
Cc: ak@linux.intel.com
Cc: Athira Rajeev 
Cc: linux-arm-kernel@lists.infradead.org
Cc: Yanteng Si 
Cc: Sun Haiyong 
Cc: John Garry 
Link: https://lore.kernel.org/r/20240926144851.245903-8-james.clark@linaro.org
Signed-off-by: Namhyung Kim 
Stable-dep-of: 24937ee839e4 ("perf evsel: Ensure the fallback message is always written to")
Signed-off-by: Sasha Levin

perf test: Don't leak workload gopipe in PERF_RECORD_*

2025-10-19T14:33:37+00:00

[ Upstream commit 48918cacefd226af44373e914e63304927c0e7dc ]

The test starts a workload and then opens events. If the events fail
to open, for example because of perf_event_paranoid, the gopipe of the
workload is leaked and the file descriptor leak check fails when the
test exits. To avoid this cancel the workload when opening the events
fails.

Before:
```
$ perf test -vv 7
  7: PERF_RECORD_* events & perf_sample fields:
 --- start ---
test child forked, pid 1189568
Using CPUID GenuineIntel-6-B7-1
 ------------------------------------------------------------
perf_event_attr:
  type                    	   0 (PERF_TYPE_HARDWARE)
  config                  	   0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                	   1
 ------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
 ------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
  exclude_kernel                   1
 ------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
 ------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
 ------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
 ------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
  exclude_kernel                   1
 ------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
Attempt to add: software/cpu-clock/
..after resolving event: software/config=0/
cpu-clock -> software/cpu-clock/
 ------------------------------------------------------------
perf_event_attr:
  type                             1 (PERF_TYPE_SOFTWARE)
  size                             136
  config                           0x9 (PERF_COUNT_SW_DUMMY)
  sample_type                      IP|TID|TIME|CPU
  read_format                      ID|LOST
  disabled                         1
  inherit                          1
  mmap                             1
  comm                             1
  enable_on_exec                   1
  task                             1
  sample_id_all                    1
  mmap2                            1
  comm_exec                        1
  ksymbol                          1
  bpf_event                        1
  { wakeup_events, wakeup_watermark } 1
 ------------------------------------------------------------
sys_perf_event_open: pid 1189569  cpu 0  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
perf_evlist__open: Permission denied
 ---- end(-2) ----
Leak of file descriptor 6 that opened: 'pipe:[14200347]'
 ---- unexpected signal (6) ----
iFailed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
    #0 0x565358f6666e in child_test_sig_handler builtin-test.c:311
    #1 0x7f29ce849df0 in __restore_rt libc_sigaction.c:0
    #2 0x7f29ce89e95c in __pthread_kill_implementation pthread_kill.c:44
    #3 0x7f29ce849cc2 in raise raise.c:27
    #4 0x7f29ce8324ac in abort abort.c:81
    #5 0x565358f662d4 in check_leaks builtin-test.c:226
    #6 0x565358f6682e in run_test_child builtin-test.c:344
    #7 0x565358ef7121 in start_command run-command.c:128
    #8 0x565358f67273 in start_test builtin-test.c:545
    #9 0x565358f6771d in __cmd_test builtin-test.c:647
    #10 0x565358f682bd in cmd_test builtin-test.c:849
    #11 0x565358ee5ded in run_builtin perf.c:349
    #12 0x565358ee6085 in handle_internal_command perf.c:401
    #13 0x565358ee61de in run_argv perf.c:448
    #14 0x565358ee6527 in main perf.c:555
    #15 0x7f29ce833ca8 in __libc_start_call_main libc_start_call_main.h:74
    #16 0x7f29ce833d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
    #17 0x565358e391c1 in _start perf[851c1]
  7: PERF_RECORD_* events & perf_sample fields                       : FAILED!
```

After:
```
$ perf test 7
  7: PERF_RECORD_* events & perf_sample fields                       : Skip (permissions)
```

Fixes: 16d00fee703866c6 ("perf tests: Move test__PERF_RECORD into separate object")
Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Athira Rajeev 
Cc: Chun-Tse Shao 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

perf test shell lbr: Avoid failures with perf event paranoia

2025-10-19T14:33:37+00:00

[ Upstream commit 48314d20fe467d6653783cbf5536cb2fcc9bdd7c ]

When not running as root and with higher perf event paranoia values
the perf record LBR tests could fail rather than skipping the
problematic tests.

Add the sensitivity to the test and confirm it passes with paranoia
values from -1 to 2.

Committer testing:

Testing with '$ perf test -vv lbr', i.e. as non root, and then comparing
the output shows the mentioned errors before this patch:

  acme@x1:~$ grep -m1 "model name" /proc/cpuinfo
  model name	: 13th Gen Intel(R) Core(TM) i7-1365U
  acme@x1:~$

Before:

 132: perf record LBR tests            : Skip

After:

 132: perf record LBR tests            : Ok

Fixes: 32559b99e0f59070 ("perf test: Add set of perf record LBR tests")
Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Chun-Tse Shao 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

perf test: Update sysfs path for core PMU caps

2025-10-19T14:33:36+00:00

[ Upstream commit b9228817127430356c929847f111197776201225 ]

While CPU is a system device, it'd be better to use a path for
event_source devices when it checks PMU capability.

Reviewed-by: Ian Rogers 
Signed-off-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/r/20250509213017.204343-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo 
Stable-dep-of: 48314d20fe46 ("perf test shell lbr: Avoid failures with perf event paranoia")
Signed-off-by: Sasha Levin

perf test trace_btf_enum: Skip if permissions are insufficient

2025-10-19T14:33:35+00:00

[ Upstream commit 4bd5bd8dbd41a208fb73afb65bda6f38e2b5a637 ]

Modify test behavior to skip if BPF calls fail with "Operation not
permitted".

Fixes: d66763fed30f0bd8 ("perf test trace_btf_enum: Add regression test for the BTF augmentation of enums in 'perf trace'")
Reviewed-by: James Clark 
Signed-off-by: Ian Rogers 
Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Athira Rajeev 
Cc: Blake Jones 
Cc: Chun-Tse Shao 
Cc: Collin Funk 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: Jan Polensky 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Li Huafei 
Cc: Mark Rutland 
Cc: Nam Cao 
Cc: Peter Zijlstra 
Cc: Steinar H. Gunderson 
Cc: Thomas Gleixner 
Link: https://lore.kernel.org/r/20250821163820.1132977-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

perf tests bp_account: Fix leaked file descriptor

2025-08-15T10:13:54+00:00

[ 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