kernel/git/stable/linux.git/tools/perf/tests/parse-events.c, branch master

perf parse-events: Restrict core PMU bypass to --cputype option

2026-07-01T00:09:13+00:00

Commit b1c5efbfd92e ("perf parse-events: Remove hard coded legacy hardware and cache parsing") introduced a bypass to PMU filtering to prevent uncore PMUs from being filtered out during event parsing, which was required for resolving `duration_time` and `uncore_freq` when running with `--cputype`. However, this bypass was active whenever `pmu_filter` was set, which also incorrectly bypassed filtering for the `--pmu-filter` option. Introduce a `cputype_filter` boolean flag in `parse_events_state` and `parse_events_option_args` to distinguish filtering initiated by `--cputype` from that initiated by `--pmu-filter`. Restrict the core-only check in `parse_events__filter_pmu()` to when `cputype_filter` is true. Fixes: b1c5efbfd92e ("perf parse-events: Remove hard coded legacy hardware and cache parsing") Assisted-by: Antigravity:gemini-3.1-pro Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf evlist: Add reference count checking

2026-06-30T17:17:11+00:00

Now the evlist is reference counted, add reference count checking so that gets and puts are paired and easy to debug. Reference count checking is documented here: https://perfwiki.github.io/main/reference-count-checking/ This large patch is adding accessors to evlist functions and switching to their use. There was some minor renaming as evlist__mmap is now an accessor to the mmap variable, and the original evlist__mmap is renamed to evlist__do_mmap. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alice Rogers Cc: Dapeng Mi Cc: Ingo Molnar Cc: James Clark Cc: Leo Yan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Richter Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

perf evlist: Add reference count

2026-06-30T17:17:10+00:00

This a no-op for most of the perf tool. The reference count is set to 1 at allocation, the put will see the 1, decrement it and perform the delete. The purpose for adding the reference count is for the python code. Prior to this change the python code would clone evlists, but this has issues if events are opened, etc. This change adds a reference count for the evlists and a later change will add it to evsels. The combination is needed for the python code to operate correctly (not hit asserts in the evsel clone), but the changes are broken apart for the sake of smaller patches. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alice Rogers Cc: Dapeng Mi Cc: Ingo Molnar Cc: James Clark Cc: Leo Yan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Richter Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

perf test: Fix ratio_to_prev event parsing test

2026-04-02T19:51:10+00:00

test__ratio_to_prev() assumed the first event in a group is the leader, which is not the case when the event is expanded into two event groups on hybrid PMU's with auto counter reload support. Instead, iterate over the event group generated for each core PMU. Also update "wrong leader" test to check that the subordinate event has the correct leader instead of checking that it is not the group leader. Finally, do not exit immediately if a PMU without auto counter reload support is found. Signed-off-by: Thomas Falcon Reviewed-by: Dapeng Mi Reviewed-by: Ian Rogers Fixes: 56be0fe5f62c ("perf record: Add auto counter reload parse and regression tests") Signed-off-by: Namhyung Kim

perf test: Add missing newlines in debug messages

2026-01-20T20:34:51+00:00

These debug messages bleed into the next log line. Fix it by adding the missing newlines. Reviewed-by: Ian Rogers Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Use const for variables receiving str{str,r?chr}() returns

2025-12-17T12:30:37+00:00

Newer glibc versions return const char for str{str,chr}() where the haystack/s is const so to avoid warnings like these on fedora 44 change some variables to const: 36 8.17 fedora:44 : FAIL gcc version 15.2.1 20251111 (Red Hat 15.2.1-4) (GCC) libbpf.c: In function 'kallsyms_cb': libbpf.c:8489:13: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 8489 | res = strstr(sym_name, ".llvm."); Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20251211221756.96294-4-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add support for perf_event_attr::config4

2025-11-24T20:20:06+00:00

perf_event_attr has gained a new field, config4, so add support for it extending the existing configN support. Reviewed-by: Leo Yan Reviewed-by: Ian Rogers Tested-by: Leo Yan Signed-off-by: James Clark Acked-by: Peter Zijlstra (Intel) Signed-off-by: Namhyung Kim

perf test parse-events: Add evsel test helper

2025-10-15T14:59:12+00:00

Add TEST_ASSERT_EVSEL to dump the failing evsel in the event of a failure. Signed-off-by: Ian Rogers Tested-by: James Clark Signed-off-by: Namhyung Kim

perf test parse-events: Add evlist test helper

2025-10-15T14:59:12+00:00

Add TEST_ASSERT_EVLIST to dump the failing evlist in the event of a failure. Add the macro to a number of tests not currently checking the evlist length. Signed-off-by: Ian Rogers Tested-by: James Clark Signed-off-by: Namhyung Kim

perf test: Clean up test_..config helpers

2025-10-15T14:59:12+00:00

Just have a single test_hw_config helper that strips extended type information in the case of hardware and hardware cache events. Signed-off-by: Ian Rogers Tested-by: James Clark Signed-off-by: Namhyung Kim