perf evlist: Add reference count

Browse source

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 <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

...

This commit is contained in:

Ian Rogers 2026-06-15 18:15:27 -07:00 • committed by Namhyung Kim

parent ea43eb1151

commit 3c45ce5ae3

54 changed files with 315 additions and 328 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

tools/perf/arch/x86/tests/hybrid.c

View file

4

tools/perf/arch/x86/tests/topdown.c

View file

2

tools/perf/arch/x86/util/iostat.c

View file

18

tools/perf/bench/evlist-open-close.c

View file

8

tools/perf/builtin-ftrace.c

View file

4

tools/perf/builtin-kvm.c

View file

2

tools/perf/builtin-lock.c

View file

4

tools/perf/builtin-record.c

View file

6

tools/perf/builtin-sched.c

View file

2

tools/perf/builtin-script.c

View file

10

tools/perf/builtin-stat.c

View file

52

tools/perf/builtin-top.c

View file

26

tools/perf/builtin-trace.c

View file

18

tools/perf/tests/backward-ring-buffer.c

View file

4

tools/perf/tests/code-reading.c

View file

4

tools/perf/tests/event-times.c

View file

2

tools/perf/tests/event_update.c

View file

8

tools/perf/tests/evsel-roundtrip-name.c

View file

8

tools/perf/tests/expand-cgroup.c

View file

2

tools/perf/tests/hists_cumulate.c

View file

2

tools/perf/tests/hists_filter.c

View file

2

tools/perf/tests/hists_link.c

View file

2

tools/perf/tests/hists_output.c

View file

2

tools/perf/tests/hwmon_pmu.c

View file

2

tools/perf/tests/keep-tracking.c

View file

18

tools/perf/tests/mmap-basic.c

View file

18

tools/perf/tests/openat-syscall-tp-fields.c

View file

4

tools/perf/tests/parse-events.c

View file

4

tools/perf/tests/parse-metric.c

View file

2

tools/perf/tests/parse-no-sample-id-all.c

View file

18

tools/perf/tests/perf-record.c

View file

2

tools/perf/tests/perf-time-to-tsc.c

View file

4

tools/perf/tests/pfm.c

View file

6

tools/perf/tests/pmu-events.c

View file

4

tools/perf/tests/pmu.c

View file

14

tools/perf/tests/sw-clock.c

View file

2

tools/perf/tests/switch-tracking.c

View file

14

tools/perf/tests/task-exit.c

View file

2

tools/perf/tests/tool_pmu.c

View file

2

tools/perf/tests/topology.c

View file

2

tools/perf/tests/uncore-event-sorting.c

View file

4

tools/perf/util/cgroup.c

View file

2

tools/perf/util/data-convert-bt.c

View file

20

tools/perf/util/evlist.c

View file

7

tools/perf/util/evlist.h

View file

2

tools/perf/util/expr.c

View file

22

tools/perf/util/header.c

View file

6

tools/perf/util/metricgroup.c

View file

4

tools/perf/util/parse-events.c

View file

2

tools/perf/util/perf_api_probe.c

View file

242

tools/perf/util/python.c

View file

2

tools/perf/util/record.c

View file

2

tools/perf/util/session.c

View file

16

tools/perf/util/sideband_evlist.c

View file