linux.git/tools/perf/tests/shell, branch v6.18.21

perf tests sched: Avoid error in cleanup on loaded machines

2026-03-04T12:19:25+00:00

[ Upstream commit c5e47e4d00fbc15f2390bb6ed8d9c21836363291 ]

The stop_noploops function will kill the noploop processes that are
running for 10 seconds.

On a loaded machine they may have already terminated meaning the kill
will return an error of no such process.

This doesn't matter and so ignore the error to avoid the test
terminating in the cleanup.

Fixes: 0e22c5ca44e68798 ("perf test: Add sched latency and script shell tests")
Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

perf test stat tests: Fix for virtualized machines

2026-03-04T12:19:22+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

2026-03-04T12:19:22+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: Fix lock contention test

2025-11-13T20:29:00+00:00

Couple of independent fixes:

1. Wire in SIGSEGV handler that terminates the test with a failure code.

2. Use "--lock-cgroup" instead of "-g"; "-g" was proposed but never
   merged. See commit 4d1792d0a2564caf ("perf lock contention: Add
   --lock-cgroup option")

3. Call cleanup() on every normal exit so trap_cleanup() doesn't mistake
   it for an unexpected signal and emit a false-negative "Unexpected
   signal in main" message.

Before patch:

  # ./perf test -vv "lock contention"
   85: kernel lock contention analysis test:
  --- start ---
  test child forked, pid 610711
  Testing perf lock record and perf lock contention
  Testing perf lock contention --use-bpf
  Testing perf lock record and perf lock contention at the same time
  Testing perf lock contention --threads
  Testing perf lock contention --lock-addr
  Testing perf lock contention --lock-cgroup
  Unexpected signal in test_aggr_cgroup
  ---- end(0) ----
   85: kernel lock contention analysis test                            : Ok

After patch:

  # ./perf test -vv "lock contention"
   85: kernel lock contention analysis test:
  --- start ---
  test child forked, pid 602637
  Testing perf lock record and perf lock contention
  Testing perf lock contention --use-bpf
  Testing perf lock record and perf lock contention at the same time
  Testing perf lock contention --threads
  Testing perf lock contention --lock-addr
  Testing perf lock contention --lock-cgroup
  Testing perf lock contention --type-filter (w/ spinlock)
  Testing perf lock contention --lock-filter (w/ tasklist_lock)
  Testing perf lock contention --callstack-filter (w/ unix_stream)
  [Skip] Could not find 'unix_stream'
  Testing perf lock contention --callstack-filter with task aggregation
  [Skip] Could not find 'unix_stream'
  Testing perf lock contention --cgroup-filter
  Testing perf lock contention CSV output
  ---- end(0) ----
   85: kernel lock contention analysis test                            : Ok

Reviewed-by: Ian Rogers 
Signed-off-by: Ravi Bangoria 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ananth Narayan 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Sandipan Das 
Cc: Santosh Shukla 
Cc: Tycho Andersen 
Signed-off-by: Arnaldo Carvalho de Melo

perf test coresight: Dismiss clang warning for unroll loop thread

2025-10-06T19:49:25+00:00

clang-18.1.3 on Ubuntu 24.04.2 reports warning:

  unroll_loop_thread.c:35:25: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
     35 |                         : /* in */ [in] "r" (in)
        |                                              ^
  unroll_loop_thread.c:39:1: warning: non-void function does not return a value [-Wreturn-type]
     39 | }
        | ^

Use the modifier "w" for 32-bit register access and return NULL at the
end of thread function.

Signed-off-by: Leo Yan 
Reviewed-by: Ian Rogers 
Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-7-4305590795b2@arm.com
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Alexandre Ghiti 
Cc: Nick Desaulniers 
Cc: Justin Stitt 
Cc: Bill Wendling 
Cc: Adrian Hunter 
Cc: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: James Clark 
Cc: linux-riscv@lists.infradead.org
Cc: llvm@lists.linux.dev
Cc: Paul Walmsley 
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf test coresight: Dismiss clang warning for thread loop

2025-10-06T19:49:25+00:00

clang-18.1.3 on Ubuntu 24.04.2 reports warning:

  thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
     41 |                 : /* in */ [i] "r" (i), [len] "r" (len)
        |                                     ^
  thread_loop.c:37:8: note: use constraint modifier "w"
     37 |                 "add %[i], %[i], #1\n"
        |                      ^~~~
        |                      %w[i]
  thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
     41 |                 : /* in */ [i] "r" (i), [len] "r" (len)
        |                                     ^
  thread_loop.c:37:14: note: use constraint modifier "w"
     37 |                 "add %[i], %[i], #1\n"
        |                            ^~~~
        |                            %w[i]
  thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
     41 |                 : /* in */ [i] "r" (i), [len] "r" (len)
        |                                     ^
  thread_loop.c:38:8: note: use constraint modifier "w"
     38 |                 "cmp %[i], %[len]\n"
        |                      ^~~~
        |                      %w[i]
  thread_loop.c:41:38: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
     41 |                 : /* in */ [i] "r" (i), [len] "r" (len)
        |                                                    ^
  thread_loop.c:38:14: note: use constraint modifier "w"
     38 |                 "cmp %[i], %[len]\n"
        |                            ^~~~~~
        |                            %w[len]

Use the modifier "w" for 32-bit register access.

Signed-off-by: Leo Yan 
Reviewed-by: Ian Rogers 
Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-6-4305590795b2@arm.com
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Alexandre Ghiti 
Cc: Nick Desaulniers 
Cc: Justin Stitt 
Cc: Bill Wendling 
Cc: Adrian Hunter 
Cc: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: James Clark 
Cc: linux-riscv@lists.infradead.org
Cc: llvm@lists.linux.dev
Cc: Paul Walmsley 
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf test coresight: Dismiss clang warning for memcpy thread

2025-10-06T19:49:25+00:00

clang-18.1.3 on Ubuntu 24.04.2 reports warning:

  memcpy_thread.c:30:1: warning: non-void function does not return a value in all control paths [-Wreturn-type]
     30 | }
        | ^

Dismiss the warning with returning NULL from the thread function.

Signed-off-by: Leo Yan 
Reviewed-by: Ian Rogers 
Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-5-4305590795b2@arm.com
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Alexandre Ghiti 
Cc: Nick Desaulniers 
Cc: Justin Stitt 
Cc: Bill Wendling 
Cc: Adrian Hunter 
Cc: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: James Clark 
Cc: linux-riscv@lists.infradead.org
Cc: llvm@lists.linux.dev
Cc: Paul Walmsley 
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf record: Add auto counter reload parse and regression tests

2025-10-03T19:49:51+00:00

Include event parsing and regression tests for auto counter reload
and ratio-to-prev event term.

Reviewed-by: Ian Rogers 
Signed-off-by: Thomas Falcon 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Dapeng Mi 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Stat std output don't fail metric only

2025-10-02T18:05:41+00:00

When running on a hypervisor the expected IPC metric may be missing as
the events may fail to be read. Don't expect metric output for this
test to avoid it failing.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Veronika Molnarova 
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add an 'import perf' test shell script

2025-10-01T19:59:06+00:00

The 'import perf' test needs to set up a path to the python module as
well as to know the python command to invoke.

These are hard coded at build time to be build a directory and the
python used in the build, which is less than desirable.

Avoid the hard coded values by reusing the existing shell script python
setup and determine a potential built python module via the path of the
perf executable.

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