On Fri, Oct 16, 2026 at 2:21 PM Arnaldo Carvalho de Melo
<acme@kernel.org> wrote:
>
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> Hello all,
>
> perf test 82 stopped reporting failures when it got its shell wrapper
> (8519e4f44c2af722), so expectations that no longer match perf went
> unverified. The prerequisite fixes are upstream now, so they are not
> repeated here.
>
> This series updates those expectations and makes the test cope with
> machines with no core PMU, or with more than one. Asking for one event
> on the latter gives one event per core PMU. The expectations ignore
> what that adds; the commit messages say what and why.
>
> The tests that map ring buffers take turns on the per user mlock budget
> (kernel.perf_event_mlock_kb) through a robust, process-shared mutex.
> The sysctl is left alone. A test killed while holding the budget does
> not leave the next one waiting.
>
> Tested: 'perf test -vv attribute' Ok on an Amlogic A311D (aarch64, as
> root), an Intel i7-14700K (hybrid, two core PMUs), x86_64 (AMD Ryzen 9
> 9950X3D, kernel 7.2.10-200.fc44) and riscv64 (Orange Pi RV). On
> riscv64 the stat tests run and the record tests report unsupp, as
> sampling is not available there (no Sscofpmf).
On a hybrid Alderlake:
Tested-by: Ian Rogers <irogers@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Thanks,
Ian
> Best regards,
>
> - Arnaldo
>
> What changed from v3:
>
> - sashiko-bot's v3 review: the python binding no longer leaks the
> parse error entries it prints when parsing fails.
> - sashiko-bot's v3 review: attr.py no longer compares an event against
> itself unrecorded, and masks both sides with both events' types.
> - sashiko-bot's v3 review: evsel__open_cpu() no longer leaks the fds
> of an attempt abandoned to disable missing features.
> - sashiko-bot's v3 review: <stdio.h> included where FILE and
> snprintf() are used, in builtin-test.c and tests-scripts.c.
>
> What changed from v2:
>
> - sashiko-bot's v2 review: a one-component kernel_since or
> kernel_until (f.i. kernel_until = 6) no longer crashes attr.py.
> - sashiko-bot's v2 review: mutex_trylock() and cond_wait() now take
> over a robust mutex left behind by a dead owner, as mutex_lock().
>
> What changed from v1:
>
> - Namhyung's python fix and Michael Petlan's two fixes are upstream
> now, so they are dropped from the series.
> - Namhyung's v1 report (test-record-branch-filter-any_call): probe
> events are no longer dumped, and the core PMU fallout is masked.
> - New, not from review: the 'requires = core-pmu' skip, the skip
> reasons and the mlock budget part.
> - New, not from review: the events of the other core PMUs are left
> out, when the expectations name a core PMU.
>
> tools/build/Makefile.feature | 1 +
> tools/build/feature/Makefile | 4 +
> tools/build/feature/test-all.c | 5 +
> .../build/feature/test-pthread-mutex-robust.c | 18 +
> tools/perf/Documentation/perf-test.txt | 36 +-
> tools/perf/Makefile.config | 4 +
> tools/perf/tests/backward-ring-buffer.c | 2 +-
> tools/perf/tests/builtin-test.c | 174 ++++++-
> tools/perf/tests/code-reading.c | 2 +-
> tools/perf/tests/keep-tracking.c | 2 +-
> tools/perf/tests/mmap-basic.c | 1 +
> tools/perf/tests/openat-syscall-tp-fields.c | 1 +
> tools/perf/tests/perf-record.c | 1 +
> tools/perf/tests/perf-time-to-tsc.c | 1 +
> tools/perf/tests/shell/attr/README | 10 +-
> tools/perf/tests/shell/attr/base-stat-group | 45 ++
> .../tests/shell/attr/test-record-graph-dwarf | 2 +-
> .../shell/attr/test-record-group-sampling | 5 +-
> .../shell/attr/test-record-group-sampling1 | 5 +-
> .../shell/attr/test-record-group-sampling2 | 5 +-
> .../perf/tests/shell/attr/test-record-group1 | 3 +-
> .../perf/tests/shell/attr/test-record-group2 | 3 +-
> .../perf/tests/shell/attr/test-record-group3 | 3 +-
> tools/perf/tests/shell/attr/test-stat-C0 | 1 +
> tools/perf/tests/shell/attr/test-stat-basic | 1 +
> tools/perf/tests/shell/attr/test-stat-default | 91 ++--
> .../tests/shell/attr/test-stat-detailed-1 | 99 ++--
> .../tests/shell/attr/test-stat-detailed-2 | 111 +++--
> .../tests/shell/attr/test-stat-detailed-3 | 115 +++--
> tools/perf/tests/shell/attr/test-stat-group1 | 3 +-
> .../tests/shell/attr/test-stat-no-inherit | 1 +
> tools/perf/tests/shell/drm_pmu.sh | 2 +-
> tools/perf/tests/shell/ftrace.sh | 2 +-
> tools/perf/tests/shell/kallsyms.sh | 2 +-
> tools/perf/tests/shell/lib/attr.py | 461 ++++++++++++++++--
> tools/perf/tests/shell/list.sh | 2 +-
> tools/perf/tests/shell/perf_sched_stats.sh | 2 +-
> tools/perf/tests/shell/probe_vfs_getname.sh | 2 +-
> tools/perf/tests/shell/python-use.sh | 2 +-
> tools/perf/tests/shell/schedstat_snapshots.sh | 2 +-
> tools/perf/tests/shell/stat+csv_output.sh | 2 +-
> tools/perf/tests/shell/stat+csv_summary.sh | 2 +-
> .../tests/shell/stat+event_uniquifying.sh | 2 +-
> tools/perf/tests/shell/stat+json_output.sh | 2 +-
> tools/perf/tests/shell/stat+shadow_stat.sh | 2 +-
> tools/perf/tests/shell/stat+std_output.sh | 2 +-
> tools/perf/tests/shell/stat.sh | 2 +-
> .../perf/tests/shell/stat_all_metricgroups.sh | 2 +-
> tools/perf/tests/shell/stat_all_metrics.sh | 2 +-
> tools/perf/tests/shell/stat_all_pfm.sh | 2 +-
> .../tests/shell/stat_bpf_counters_cgrp.sh | 2 +-
> tools/perf/tests/shell/stat_metrics_cgrp.sh | 2 +-
> tools/perf/tests/shell/stat_metrics_values.sh | 2 +-
> tools/perf/tests/shell/test_ilist_python.sh | 2 +-
> .../perf/tests/shell/test_stat_cpi_python.sh | 2 +-
> .../tests/shell/test_test_junit_output.sh | 5 +-
> .../shell/test_uprobe_from_different_cu.sh | 2 +-
> tools/perf/tests/sw-clock.c | 2 +-
> tools/perf/tests/task-exit.c | 1 +
> tools/perf/tests/tests-scripts.c | 85 +++-
> tools/perf/tests/tests.h | 17 +
> tools/perf/util/evsel.c | 42 +-
> tools/perf/util/evsel.h | 1 +
> tools/perf/util/mutex.c | 101 +++-
> tools/perf/util/mutex.h | 6 +
> tools/perf/util/pfm.c | 1 +
> tools/perf/util/print-events.c | 1 +
> tools/perf/util/python.c | 2 +
> 68 files changed, 1256 insertions(+), 272 deletions(-)
>
> base-commit: cb9dba6f4764fc68ab75c36e332887332339f9c3
> v1-head: b1300831ecc4503d
> v2-head: da166ef7a002
> v3-head: c5f0897aceb01743