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Message-ID: <CAP-5=fXz+tG-6q54FNY2OrKcz4zjncRXEWzV8E2suXmOA4MzEw@mail.gmail.com>
Date: Wed, 29 Oct 2025 09:56:50 -0700
From: Ian Rogers <irogers@...gle.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Suzuki K Poulose <suzuki.poulose@....com>, Mike Leach <mike.leach@...aro.org>,
James Clark <james.clark@...aro.org>, John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>, Leo Yan <leo.yan@...ux.dev>,
Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Charlie Jenkins <charlie@...osinc.com>, Thomas Falcon <thomas.falcon@...el.com>,
Yicong Yang <yangyicong@...ilicon.com>, Thomas Richter <tmricht@...ux.ibm.com>,
Athira Rajeev <atrajeev@...ux.ibm.com>, Howard Chu <howardchu95@...il.com>,
Song Liu <song@...nel.org>, Dapeng Mi <dapeng1.mi@...ux.intel.com>,
Levi Yun <yeoreum.yun@....com>, Zhongqiu Han <quic_zhonhan@...cinc.com>,
Blake Jones <blakejones@...gle.com>, Anubhav Shelat <ashelat@...hat.com>,
Chun-Tse Shao <ctshao@...gle.com>, Christophe Leroy <christophe.leroy@...roup.eu>,
Jean-Philippe Romain <jean-philippe.romain@...s.st.com>, Gautam Menghani <gautam@...ux.ibm.com>,
Dmitry Vyukov <dvyukov@...gle.com>, Yang Li <yang.lee@...ux.alibaba.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Andi Kleen <ak@...ux.intel.com>, Weilin Wang <weilin.wang@...el.com>
Subject: Re: [RFC PATCH v1 12/15] perf evlist: Add reference count
On Wed, Oct 29, 2025 at 9:22 AM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> On Tue, Oct 28, 2025 at 10:34:10PM -0700, Ian Rogers wrote:
> > 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.
>
> Looks ok, noisy for all the s/delete/put/ but that is ok, but then you
> are not using the RC_CHK_ACCESS stuff from the get go, why not?
So if I did RC_CHK_ACCESS then every evsel access would need updating,
accessor functions, and a lot of lines of code. As the reference count
checking doesn't work with invasive lists, you need to interpose prev
and next, I think we'd need to specially handle the case probably with
an extra variable in evsel for reference count checking like:
```
RC_STRUCT(evsel) {
...
struct evsel *evlist_ptr;
...
}
```
and things like evlist__for_each_entry need changes like:
```
#define evlist__for_each_entry(evlist, evsel) \
__evlist__for_each_entry(&(evlist)->core.entries, orig_evsel) {
evsel = orig_evsel->evlist_ptr
```
but it may be simpler to change evlist to use an array of evsel* as
was done in places like `struct maps`.
Anyway, those changes I think would have taken away from what the
series was trying to do and so weren't done here.
Thanks,
Ian
> All the prep patches looks ok, assuming they build in succession.
>
> - Arnaldo
>
> > Signed-off-by: Ian Rogers <irogers@...gle.com>
> > ---
> > tools/perf/arch/x86/tests/hybrid.c | 2 +-
> > tools/perf/arch/x86/tests/topdown.c | 2 +-
> > tools/perf/arch/x86/util/iostat.c | 2 +-
> > tools/perf/bench/evlist-open-close.c | 18 +-
> > tools/perf/builtin-ftrace.c | 8 +-
> > tools/perf/builtin-kvm.c | 4 +-
> > tools/perf/builtin-lock.c | 2 +-
> > tools/perf/builtin-record.c | 4 +-
> > tools/perf/builtin-stat.c | 8 +-
> > tools/perf/builtin-top.c | 52 +++---
> > tools/perf/builtin-trace.c | 26 +--
> > tools/perf/tests/backward-ring-buffer.c | 18 +-
> > tools/perf/tests/code-reading.c | 4 +-
> > tools/perf/tests/event-times.c | 4 +-
> > tools/perf/tests/event_update.c | 2 +-
> > tools/perf/tests/evsel-roundtrip-name.c | 8 +-
> > tools/perf/tests/expand-cgroup.c | 8 +-
> > tools/perf/tests/hists_cumulate.c | 2 +-
> > tools/perf/tests/hists_filter.c | 2 +-
> > tools/perf/tests/hists_link.c | 2 +-
> > tools/perf/tests/hists_output.c | 2 +-
> > tools/perf/tests/hwmon_pmu.c | 2 +-
> > tools/perf/tests/keep-tracking.c | 2 +-
> > tools/perf/tests/mmap-basic.c | 18 +-
> > tools/perf/tests/openat-syscall-tp-fields.c | 18 +-
> > tools/perf/tests/parse-events.c | 4 +-
> > tools/perf/tests/parse-metric.c | 4 +-
> > tools/perf/tests/parse-no-sample-id-all.c | 2 +-
> > tools/perf/tests/perf-record.c | 18 +-
> > tools/perf/tests/perf-time-to-tsc.c | 2 +-
> > tools/perf/tests/pfm.c | 4 +-
> > tools/perf/tests/pmu-events.c | 6 +-
> > tools/perf/tests/pmu.c | 2 +-
> > tools/perf/tests/sw-clock.c | 14 +-
> > tools/perf/tests/switch-tracking.c | 2 +-
> > tools/perf/tests/task-exit.c | 14 +-
> > tools/perf/tests/tool_pmu.c | 2 +-
> > tools/perf/tests/topology.c | 2 +-
> > tools/perf/util/cgroup.c | 4 +-
> > tools/perf/util/data-convert-bt.c | 2 +-
> > tools/perf/util/evlist.c | 20 ++-
> > tools/perf/util/evlist.h | 7 +-
> > tools/perf/util/expr.c | 2 +-
> > tools/perf/util/header.c | 12 +-
> > tools/perf/util/metricgroup.c | 6 +-
> > tools/perf/util/parse-events.c | 4 +-
> > tools/perf/util/perf_api_probe.c | 2 +-
> > tools/perf/util/python.c | 176 +++++++-------------
> > tools/perf/util/record.c | 2 +-
> > tools/perf/util/session.c | 2 +-
> > tools/perf/util/sideband_evlist.c | 16 +-
> > 51 files changed, 252 insertions(+), 299 deletions(-)
> >
> > diff --git a/tools/perf/arch/x86/tests/hybrid.c b/tools/perf/arch/x86/tests/hybrid.c
> > index e221ea104174..dfb0ffc0d030 100644
> > --- a/tools/perf/arch/x86/tests/hybrid.c
> > +++ b/tools/perf/arch/x86/tests/hybrid.c
> > @@ -268,7 +268,7 @@ static int test_event(const struct evlist_test *e)
> > ret = e->check(evlist);
> > }
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> >
> > return ret;
> > }
> > diff --git a/tools/perf/arch/x86/tests/topdown.c b/tools/perf/arch/x86/tests/topdown.c
> > index 1eba3b4594ef..b31aef4ef28b 100644
> > --- a/tools/perf/arch/x86/tests/topdown.c
> > +++ b/tools/perf/arch/x86/tests/topdown.c
> > @@ -55,7 +55,7 @@ static int event_cb(void *state, struct pmu_event_info *info)
> > *ret = TEST_FAIL;
> > }
> > }
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return 0;
> > }
> >
> > diff --git a/tools/perf/arch/x86/util/iostat.c b/tools/perf/arch/x86/util/iostat.c
> > index 7442a2cd87ed..e0417552b0cb 100644
> > --- a/tools/perf/arch/x86/util/iostat.c
> > +++ b/tools/perf/arch/x86/util/iostat.c
> > @@ -337,7 +337,7 @@ int iostat_prepare(struct evlist *evlist, struct perf_stat_config *config)
> > if (evlist->core.nr_entries > 0) {
> > pr_warning("The -e and -M options are not supported."
> > "All chosen events/metrics will be dropped\n");
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > evlist = evlist__new();
> > if (!evlist)
> > return -ENOMEM;
> > diff --git a/tools/perf/bench/evlist-open-close.c b/tools/perf/bench/evlist-open-close.c
> > index bfaf50e4e519..a802fb005ee3 100644
> > --- a/tools/perf/bench/evlist-open-close.c
> > +++ b/tools/perf/bench/evlist-open-close.c
> > @@ -75,7 +75,7 @@ static struct evlist *bench__create_evlist(char *evstr, const char *uid_str)
> > parse_events_error__exit(&err);
> > pr_err("Run 'perf list' for a list of valid events\n");
> > ret = 1;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > parse_events_error__exit(&err);
> > if (uid_str) {
> > @@ -84,24 +84,24 @@ static struct evlist *bench__create_evlist(char *evstr, const char *uid_str)
> > if (uid == UINT_MAX) {
> > pr_err("Invalid User: %s", uid_str);
> > ret = -EINVAL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > ret = parse_uid_filter(evlist, uid);
> > if (ret)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > ret = evlist__create_maps(evlist, &opts.target);
> > if (ret < 0) {
> > pr_err("Not enough memory to create thread/cpu maps\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__config(evlist, &opts, NULL);
> >
> > return evlist;
> >
> > -out_delete_evlist:
> > - evlist__delete(evlist);
> > +out_put_evlist:
> > + evlist__put(evlist);
> > return NULL;
> > }
> >
> > @@ -150,7 +150,7 @@ static int bench_evlist_open_close__run(char *evstr, const char *uid_str)
> > evlist->core.nr_entries, evlist__count_evsel_fds(evlist));
> > printf(" Number of iterations:\t%d\n", iterations);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> >
> > for (i = 0; i < iterations; i++) {
> > pr_debug("Started iteration %d\n", i);
> > @@ -161,7 +161,7 @@ static int bench_evlist_open_close__run(char *evstr, const char *uid_str)
> > gettimeofday(&start, NULL);
> > err = bench__do_evlist_open_close(evlist);
> > if (err) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > @@ -170,7 +170,7 @@ static int bench_evlist_open_close__run(char *evstr, const char *uid_str)
> > runtime_us = timeval2usec(&diff);
> > update_stats(&time_stats, runtime_us);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > pr_debug("Iteration %d took:\t%" PRIu64 "us\n", i, runtime_us);
> > }
> >
> > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
> > index 6b6eec65f93f..4a2fe05e9786 100644
> > --- a/tools/perf/builtin-ftrace.c
> > +++ b/tools/perf/builtin-ftrace.c
> > @@ -1993,20 +1993,20 @@ int cmd_ftrace(int argc, const char **argv)
> >
> > ret = evlist__create_maps(ftrace.evlist, &ftrace.target);
> > if (ret < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (argc) {
> > ret = evlist__prepare_workload(ftrace.evlist, &ftrace.target,
> > argv, false,
> > ftrace__workload_exec_failed_signal);
> > if (ret < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > ret = cmd_func(&ftrace);
> >
> > -out_delete_evlist:
> > - evlist__delete(ftrace.evlist);
> > +out_put_evlist:
> > + evlist__put(ftrace.evlist);
> >
> > out_delete_filters:
> > delete_filter_func(&ftrace.filters);
> > diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
> > index f0f285763f19..b07cbe051e33 100644
> > --- a/tools/perf/builtin-kvm.c
> > +++ b/tools/perf/builtin-kvm.c
> > @@ -1806,7 +1806,7 @@ static struct evlist *kvm_live_event_list(void)
> >
> > out:
> > if (err) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > evlist = NULL;
> > }
> >
> > @@ -1937,7 +1937,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
> > out:
> > perf_session__delete(kvm->session);
> > kvm->session = NULL;
> > - evlist__delete(kvm->evlist);
> > + evlist__put(kvm->evlist);
> >
> > return err;
> > }
> > diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
> > index 078634461df2..2a57767f03a9 100644
> > --- a/tools/perf/builtin-lock.c
> > +++ b/tools/perf/builtin-lock.c
> > @@ -2143,7 +2143,7 @@ static int __cmd_contention(int argc, const char **argv)
> >
> > out_delete:
> > lock_filter_finish();
> > - evlist__delete(con.evlist);
> > + evlist__put(con.evlist);
> > lock_contention_finish(&con);
> > perf_session__delete(session);
> > perf_env__exit(&host_env);
> > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> > index 3d8cf4090a92..738dbae80eac 100644
> > --- a/tools/perf/builtin-record.c
> > +++ b/tools/perf/builtin-record.c
> > @@ -4349,7 +4349,7 @@ int cmd_record(int argc, const char **argv)
> > goto out;
> >
> > evlist__splice_list_tail(rec->evlist, &def_evlist->core.entries);
> > - evlist__delete(def_evlist);
> > + evlist__put(def_evlist);
> > }
> >
> > if (rec->opts.target.tid && !rec->opts.no_inherit_set)
> > @@ -4460,7 +4460,7 @@ int cmd_record(int argc, const char **argv)
> > auxtrace_record__free(rec->itr);
> > out_opts:
> > evlist__close_control(rec->opts.ctl_fd, rec->opts.ctl_fd_ack, &rec->opts.ctl_fd_close);
> > - evlist__delete(rec->evlist);
> > + evlist__put(rec->evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> > index 886727ae8529..282926c6abd4 100644
> > --- a/tools/perf/builtin-stat.c
> > +++ b/tools/perf/builtin-stat.c
> > @@ -2067,7 +2067,7 @@ static int add_default_events(void)
> > metricgroup__copy_metric_events(evlist, /*cgrp=*/NULL,
> > &evlist->metric_events,
> > &metric_evlist->metric_events);
> > - evlist__delete(metric_evlist);
> > + evlist__put(metric_evlist);
> > }
> > }
> >
> > @@ -2142,7 +2142,7 @@ static int add_default_events(void)
> > metricgroup__copy_metric_events(evsel_list, /*cgrp=*/NULL,
> > &evsel_list->metric_events,
> > &evlist->metric_events);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > @@ -2373,7 +2373,7 @@ static int __cmd_report(int argc, const char **argv)
> >
> > perf_stat.session = session;
> > stat_config.output = stderr;
> > - evlist__delete(evsel_list);
> > + evlist__put(evsel_list);
> > evsel_list = session->evlist;
> >
> > ret = perf_session__process_events(session);
> > @@ -3042,7 +3042,7 @@ int cmd_stat(int argc, const char **argv)
> > if (smi_cost && smi_reset)
> > sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
> >
> > - evlist__delete(evsel_list);
> > + evlist__put(evsel_list);
> >
> > evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
> >
> > diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> > index 710604c4f6f6..45d5dae54dcd 100644
> > --- a/tools/perf/builtin-top.c
> > +++ b/tools/perf/builtin-top.c
> > @@ -1641,14 +1641,14 @@ int cmd_top(int argc, const char **argv)
> > perf_env__init(&host_env);
> > status = perf_config(perf_top_config, &top);
> > if (status)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > /*
> > * Since the per arch annotation init routine may need the cpuid, read
> > * it here, since we are not getting this from the perf.data header.
> > */
> > status = perf_env__set_cmdline(&host_env, argc, argv);
> > if (status)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > status = perf_env__read_cpuid(&host_env);
> > if (status) {
> > @@ -1669,44 +1669,44 @@ int cmd_top(int argc, const char **argv)
> > annotate_opts.disassembler_style = strdup(disassembler_style);
> > if (!annotate_opts.disassembler_style) {
> > status = -ENOMEM;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> > if (objdump_path) {
> > annotate_opts.objdump_path = strdup(objdump_path);
> > if (!annotate_opts.objdump_path) {
> > status = -ENOMEM;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> > if (addr2line_path) {
> > symbol_conf.addr2line_path = strdup(addr2line_path);
> > if (!symbol_conf.addr2line_path) {
> > status = -ENOMEM;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> >
> > status = symbol__validate_sym_arguments();
> > if (status)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (annotate_check_args() < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (!top.evlist->core.nr_entries) {
> > struct evlist *def_evlist = evlist__new_default();
> >
> > if (!def_evlist)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > evlist__splice_list_tail(top.evlist, &def_evlist->core.entries);
> > - evlist__delete(def_evlist);
> > + evlist__put(def_evlist);
> > }
> >
> > status = evswitch__init(&top.evswitch, top.evlist, stderr);
> > if (status)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (symbol_conf.report_hierarchy) {
> > /* disable incompatible options */
> > @@ -1717,18 +1717,18 @@ int cmd_top(int argc, const char **argv)
> > pr_err("Error: --hierarchy and --fields options cannot be used together\n");
> > parse_options_usage(top_usage, options, "fields", 0);
> > parse_options_usage(NULL, options, "hierarchy", 0);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> >
> > if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {
> > pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (nr_cgroups > 0 && opts->record_cgroup) {
> > pr_err("--cgroup and --all-cgroups cannot be used together\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (branch_call_mode) {
> > @@ -1752,7 +1752,7 @@ int cmd_top(int argc, const char **argv)
> > status = perf_env__read_core_pmu_caps(&host_env);
> > if (status) {
> > pr_err("PMU capability data is not available\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> >
> > @@ -1775,7 +1775,7 @@ int cmd_top(int argc, const char **argv)
> > if (IS_ERR(top.session)) {
> > status = PTR_ERR(top.session);
> > top.session = NULL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > top.evlist->session = top.session;
> >
> > @@ -1785,7 +1785,7 @@ int cmd_top(int argc, const char **argv)
> > if (field_order)
> > parse_options_usage(sort_order ? NULL : top_usage,
> > options, "fields", 0);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > status = target__validate(target);
> > @@ -1800,11 +1800,11 @@ int cmd_top(int argc, const char **argv)
> > if (uid == UINT_MAX) {
> > ui__error("Invalid User: %s", top.uid_str);
> > status = -EINVAL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > status = parse_uid_filter(top.evlist, uid);
> > if (status)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (target__none(target))
> > @@ -1814,7 +1814,7 @@ int cmd_top(int argc, const char **argv)
> > ui__error("Couldn't create thread/CPU maps: %s\n",
> > errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
> > status = -errno;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (top.delay_secs < 1)
> > @@ -1822,7 +1822,7 @@ int cmd_top(int argc, const char **argv)
> >
> > if (record_opts__config(opts)) {
> > status = -EINVAL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > top.sym_evsel = evlist__first(top.evlist);
> > @@ -1837,14 +1837,14 @@ int cmd_top(int argc, const char **argv)
> >
> > status = symbol__annotation_init();
> > if (status < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > annotation_config__init();
> >
> > symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
> > status = symbol__init(NULL);
> > if (status < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > sort__setup_elide(stdout);
> >
> > @@ -1864,13 +1864,13 @@ int cmd_top(int argc, const char **argv)
> > if (top.sb_evlist == NULL) {
> > pr_err("Couldn't create side band evlist.\n.");
> > status = -EINVAL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (evlist__add_bpf_sb_event(top.sb_evlist, &host_env)) {
> > pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
> > status = -EINVAL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> > #endif
> > @@ -1885,8 +1885,8 @@ int cmd_top(int argc, const char **argv)
> > if (!opts->no_bpf_event)
> > evlist__stop_sb_thread(top.sb_evlist);
> >
> > -out_delete_evlist:
> > - evlist__delete(top.evlist);
> > +out_put_evlist:
> > + evlist__put(top.evlist);
> > perf_session__delete(top.session);
> > annotation_options__exit();
> > perf_env__exit(&host_env);
> > diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> > index a743bda294bd..c056df42a78f 100644
> > --- a/tools/perf/builtin-trace.c
> > +++ b/tools/perf/builtin-trace.c
> > @@ -4364,7 +4364,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> >
> > if (trace->summary_bpf) {
> > if (trace_prepare_bpf_summary(trace->summary_mode) < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (trace->summary_only)
> > goto create_maps;
> > @@ -4432,19 +4432,19 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> > err = evlist__create_maps(evlist, &trace->opts.target);
> > if (err < 0) {
> > fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > err = trace__symbols_init(trace, argc, argv, evlist);
> > if (err < 0) {
> > fprintf(trace->output, "Problems initializing symbol libraries!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (trace->summary_mode == SUMMARY__BY_TOTAL && !trace->summary_bpf) {
> > trace->syscall_stats = alloc_syscall_stats();
> > if (IS_ERR(trace->syscall_stats))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__config(evlist, &trace->opts, &callchain_param);
> > @@ -4453,7 +4453,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> > err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
> > if (err < 0) {
> > fprintf(trace->output, "Couldn't run the workload!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > workload_pid = evlist->workload.pid;
> > }
> > @@ -4501,7 +4501,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> >
> > err = trace__expand_filters(trace, &evsel);
> > if (err)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > err = evlist__apply_filters(evlist, &evsel, &trace->opts.target);
> > if (err < 0)
> > goto out_error_apply_filters;
> > @@ -4618,12 +4618,12 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> > }
> > }
> >
> > -out_delete_evlist:
> > +out_put_evlist:
> > trace_cleanup_bpf_summary();
> > delete_syscall_stats(trace->syscall_stats);
> > trace__symbols__exit(trace);
> > evlist__free_syscall_tp_fields(evlist);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > cgroup__put(trace->cgroup);
> > trace->evlist = NULL;
> > trace->live = false;
> > @@ -4648,22 +4648,22 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> >
> > out_error:
> > fprintf(trace->output, "%s\n", errbuf);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > out_error_apply_filters:
> > fprintf(trace->output,
> > "Failed to set filter \"%s\" on event %s with %d (%s)\n",
> > evsel->filter, evsel__name(evsel), errno,
> > str_error_r(errno, errbuf, sizeof(errbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > out_error_mem:
> > fprintf(trace->output, "Not enough memory to run!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > out_errno:
> > fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > static int trace__replay(struct trace *trace)
> > @@ -5331,7 +5331,7 @@ static void trace__exit(struct trace *trace)
> > zfree(&trace->syscalls.table);
> > }
> > zfree(&trace->perfconfig_events);
> > - evlist__delete(trace->evlist);
> > + evlist__put(trace->evlist);
> > trace->evlist = NULL;
> > ordered_events__free(&trace->oe.data);
> > #ifdef HAVE_LIBBPF_SUPPORT
> > diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
> > index c5e7999f2817..2b49b002d749 100644
> > --- a/tools/perf/tests/backward-ring-buffer.c
> > +++ b/tools/perf/tests/backward-ring-buffer.c
> > @@ -111,7 +111,7 @@ static int test__backward_ring_buffer(struct test_suite *test __maybe_unused, in
> > err = evlist__create_maps(evlist, &opts.target);
> > if (err < 0) {
> > pr_debug("Not enough memory to create thread/cpu maps\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > parse_events_error__init(&parse_error);
> > @@ -124,7 +124,7 @@ static int test__backward_ring_buffer(struct test_suite *test __maybe_unused, in
> > if (err) {
> > pr_debug("Failed to parse tracepoint event, try use root\n");
> > ret = TEST_SKIP;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__config(evlist, &opts, NULL);
> > @@ -133,19 +133,19 @@ static int test__backward_ring_buffer(struct test_suite *test __maybe_unused, in
> > if (err < 0) {
> > pr_debug("perf_evlist__open: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > ret = TEST_FAIL;
> > err = do_test(evlist, opts.mmap_pages, &sample_count,
> > &comm_count);
> > if (err != TEST_OK)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if ((sample_count != NR_ITERS) || (comm_count != NR_ITERS)) {
> > pr_err("Unexpected counter: sample_count=%d, comm_count=%d\n",
> > sample_count, comm_count);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__close(evlist);
> > @@ -154,16 +154,16 @@ static int test__backward_ring_buffer(struct test_suite *test __maybe_unused, in
> > if (err < 0) {
> > pr_debug("perf_evlist__open: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > err = do_test(evlist, 1, &sample_count, &comm_count);
> > if (err != TEST_OK)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > ret = TEST_OK;
> > -out_delete_evlist:
> > - evlist__delete(evlist);
> > +out_put_evlist:
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
> > index 5927d1ea20e2..8da8951154d8 100644
> > --- a/tools/perf/tests/code-reading.c
> > +++ b/tools/perf/tests/code-reading.c
> > @@ -806,7 +806,7 @@ static int do_test_code_reading(bool try_kcore)
> > }
> >
> > perf_evlist__set_maps(&evlist->core, NULL, NULL);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > evlist = NULL;
> > continue;
> > }
> > @@ -843,7 +843,7 @@ static int do_test_code_reading(bool try_kcore)
> > out_put:
> > thread__put(thread);
> > out_err:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > machine__delete(machine);
> > diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c
> > index ae3b98bb42cf..94ab54ecd3f9 100644
> > --- a/tools/perf/tests/event-times.c
> > +++ b/tools/perf/tests/event-times.c
> > @@ -186,7 +186,7 @@ static int test_times(int (attach)(struct evlist *),
> > err = attach(evlist);
> > if (err == TEST_SKIP) {
> > pr_debug(" SKIP : not enough rights\n");
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > @@ -205,7 +205,7 @@ static int test_times(int (attach)(struct evlist *),
> > count.ena, count.run);
> >
> > out_err:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return !err ? TEST_OK : TEST_FAIL;
> > }
> >
> > diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
> > index cb9e6de2e033..8de66dac52b0 100644
> > --- a/tools/perf/tests/event_update.c
> > +++ b/tools/perf/tests/event_update.c
> > @@ -115,7 +115,7 @@ static int test__event_update(struct test_suite *test __maybe_unused, int subtes
> > TEST_ASSERT_VAL("failed to synthesize attr update cpus",
> > !perf_event__synthesize_event_update_cpus(&tmp.tool, evsel, process_event_cpus));
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return 0;
> > }
> >
> > diff --git a/tools/perf/tests/evsel-roundtrip-name.c b/tools/perf/tests/evsel-roundtrip-name.c
> > index 1922cac13a24..6a220634c52f 100644
> > --- a/tools/perf/tests/evsel-roundtrip-name.c
> > +++ b/tools/perf/tests/evsel-roundtrip-name.c
> > @@ -33,7 +33,7 @@ static int perf_evsel__roundtrip_cache_name_test(void)
> > if (err) {
> > pr_debug("Failure to parse cache event '%s' possibly as PMUs don't support it",
> > name);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > continue;
> > }
> > evlist__for_each_entry(evlist, evsel) {
> > @@ -42,7 +42,7 @@ static int perf_evsel__roundtrip_cache_name_test(void)
> > ret = TEST_FAIL;
> > }
> > }
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > }
> > }
> > @@ -66,7 +66,7 @@ static int perf_evsel__name_array_test(const char *const names[], int nr_names)
> > if (err) {
> > pr_debug("failed to parse event '%s', err %d\n",
> > names[i], err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > ret = TEST_FAIL;
> > continue;
> > }
> > @@ -76,7 +76,7 @@ static int perf_evsel__name_array_test(const char *const names[], int nr_names)
> > ret = TEST_FAIL;
> > }
> > }
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > return ret;
> > }
> > diff --git a/tools/perf/tests/expand-cgroup.c b/tools/perf/tests/expand-cgroup.c
> > index c7b32a220ca1..9060b085e3de 100644
> > --- a/tools/perf/tests/expand-cgroup.c
> > +++ b/tools/perf/tests/expand-cgroup.c
> > @@ -104,7 +104,7 @@ static int expand_default_events(void)
> > TEST_ASSERT_VAL("failed to get evlist", evlist);
> >
> > ret = test_expand_events(evlist);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > @@ -131,7 +131,7 @@ static int expand_group_events(void)
> > ret = test_expand_events(evlist);
> > out:
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > @@ -162,7 +162,7 @@ static int expand_libpfm_events(void)
> >
> > ret = test_expand_events(evlist);
> > out:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > @@ -186,7 +186,7 @@ static int expand_metric_events(void)
> > ret = test_expand_events(evlist);
> >
> > out:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/tests/hists_cumulate.c b/tools/perf/tests/hists_cumulate.c
> > index 3eb9ef8d7ec6..8f7cce7b5085 100644
> > --- a/tools/perf/tests/hists_cumulate.c
> > +++ b/tools/perf/tests/hists_cumulate.c
> > @@ -744,7 +744,7 @@ static int test__hists_cumulate(struct test_suite *test __maybe_unused, int subt
> >
> > out:
> > /* tear down everything */
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > machines__exit(&machines);
> > put_fake_samples();
> >
> > diff --git a/tools/perf/tests/hists_filter.c b/tools/perf/tests/hists_filter.c
> > index 1cebd20cc91c..447fb2b5947c 100644
> > --- a/tools/perf/tests/hists_filter.c
> > +++ b/tools/perf/tests/hists_filter.c
> > @@ -331,7 +331,7 @@ static int test__hists_filter(struct test_suite *test __maybe_unused, int subtes
> >
> > out:
> > /* tear down everything */
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > reset_output_field();
> > machines__exit(&machines);
> > put_fake_samples();
> > diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
> > index 996f5f0b3bd1..9646c3b7b4de 100644
> > --- a/tools/perf/tests/hists_link.c
> > +++ b/tools/perf/tests/hists_link.c
> > @@ -352,7 +352,7 @@ static int test__hists_link(struct test_suite *test __maybe_unused, int subtest
> >
> > out:
> > /* tear down everything */
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > reset_output_field();
> > machines__exit(&machines);
> > put_fake_samples();
> > diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
> > index ee5ec8bda60e..aa8565fbaf90 100644
> > --- a/tools/perf/tests/hists_output.c
> > +++ b/tools/perf/tests/hists_output.c
> > @@ -631,7 +631,7 @@ static int test__hists_output(struct test_suite *test __maybe_unused, int subtes
> >
> > out:
> > /* tear down everything */
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > machines__exit(&machines);
> > put_fake_samples();
> >
> > diff --git a/tools/perf/tests/hwmon_pmu.c b/tools/perf/tests/hwmon_pmu.c
> > index 97ea036ebae6..7d1040619575 100644
> > --- a/tools/perf/tests/hwmon_pmu.c
> > +++ b/tools/perf/tests/hwmon_pmu.c
> > @@ -211,7 +211,7 @@ static int do_test(size_t i, bool with_pmu, bool with_alias)
> >
> > out:
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
> > index 729cc9cc1cb7..51cfd6522867 100644
> > --- a/tools/perf/tests/keep-tracking.c
> > +++ b/tools/perf/tests/keep-tracking.c
> > @@ -153,7 +153,7 @@ static int test__keep_tracking(struct test_suite *test __maybe_unused, int subte
> > out_err:
> > if (evlist) {
> > evlist__disable(evlist);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
> > index a622bb8d4cc8..2591b6fbec3f 100644
> > --- a/tools/perf/tests/mmap-basic.c
> > +++ b/tools/perf/tests/mmap-basic.c
> > @@ -93,7 +93,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > /* Permissions failure, flag the failure as a skip. */
> > err = TEST_SKIP;
> > }
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evsels[i]->core.attr.wakeup_events = 1;
> > @@ -105,7 +105,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("failed to open counter: %s, "
> > "tweak /proc/sys/kernel/perf_event_paranoid?\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > nr_events[i] = 0;
> > @@ -115,7 +115,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > if (evlist__mmap(evlist, 128) < 0) {
> > pr_debug("failed to mmap events: %d (%s)\n", errno,
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > for (i = 0; i < nsyscalls; ++i)
> > @@ -133,7 +133,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > if (event->header.type != PERF_RECORD_SAMPLE) {
> > pr_debug("unexpected %s event\n",
> > perf_event__name(event->header.type));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > perf_sample__init(&sample, /*all=*/false);
> > @@ -141,7 +141,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > if (err) {
> > pr_err("Can't parse sample, err = %d\n", err);
> > perf_sample__exit(&sample);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > err = -1;
> > @@ -150,7 +150,7 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > if (evsel == NULL) {
> > pr_debug("event with id %" PRIu64
> > " doesn't map to an evsel\n", sample.id);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > nr_events[evsel->core.idx]++;
> > perf_mmap__consume(&md->core);
> > @@ -165,12 +165,12 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > expected_nr_events[evsel->core.idx],
> > evsel__name(evsel), nr_events[evsel->core.idx]);
> > err = -1;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> >
> > -out_delete_evlist:
> > - evlist__delete(evlist);
> > +out_put_evlist:
> > + evlist__put(evlist);
> > out_free_cpus:
> > perf_cpu_map__put(cpus);
> > out_free_threads:
> > diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
> > index 2a139d2781a8..3ff595c7a86a 100644
> > --- a/tools/perf/tests/openat-syscall-tp-fields.c
> > +++ b/tools/perf/tests/openat-syscall-tp-fields.c
> > @@ -51,7 +51,7 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> > if (IS_ERR(evsel)) {
> > pr_debug("%s: evsel__newtp\n", __func__);
> > ret = PTR_ERR(evsel) == -EACCES ? TEST_SKIP : TEST_FAIL;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__add(evlist, evsel);
> > @@ -59,7 +59,7 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> > err = evlist__create_maps(evlist, &opts.target);
> > if (err < 0) {
> > pr_debug("%s: evlist__create_maps\n", __func__);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evsel__config(evsel, &opts, NULL);
> > @@ -70,14 +70,14 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> > if (err < 0) {
> > pr_debug("perf_evlist__open: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > err = evlist__mmap(evlist, UINT_MAX);
> > if (err < 0) {
> > pr_debug("evlist__mmap: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__enable(evlist);
> > @@ -115,7 +115,7 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> > if (err) {
> > pr_debug("Can't parse sample, err = %d\n", err);
> > perf_sample__exit(&sample);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > tp_flags = evsel__intval(evsel, &sample, "flags");
> > @@ -123,7 +123,7 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> > if (flags != tp_flags) {
> > pr_debug("%s: Expected flags=%#x, got %#x\n",
> > __func__, flags, tp_flags);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > goto out_ok;
> > @@ -136,13 +136,13 @@ static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused
> >
> > if (++nr_polls > 5) {
> > pr_debug("%s: no events!\n", __func__);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > }
> > out_ok:
> > ret = TEST_OK;
> > -out_delete_evlist:
> > - evlist__delete(evlist);
> > +out_put_evlist:
> > + evlist__put(evlist);
> > out:
> > return ret;
> > }
> > diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> > index e4cdb517c10e..0778462016f7 100644
> > --- a/tools/perf/tests/parse-events.c
> > +++ b/tools/perf/tests/parse-events.c
> > @@ -2550,7 +2550,7 @@ static int test_event(const struct evlist_test *e)
> > ret = e->check(evlist);
> > }
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> >
> > return ret;
> > }
> > @@ -2576,7 +2576,7 @@ static int test_event_fake_pmu(const char *str)
> > }
> >
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> >
> > return ret;
> > }
> > diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
> > index 66a5275917e2..b343628c7a7e 100644
> > --- a/tools/perf/tests/parse-metric.c
> > +++ b/tools/perf/tests/parse-metric.c
> > @@ -83,7 +83,7 @@ static int __compute_metric(const char *name, struct value *vals,
> >
> > cpus = perf_cpu_map__new("0");
> > if (!cpus) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return -ENOMEM;
> > }
> >
> > @@ -112,7 +112,7 @@ static int __compute_metric(const char *name, struct value *vals,
> > /* ... cleanup. */
> > evlist__free_stats(evlist);
> > perf_cpu_map__put(cpus);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/tests/parse-no-sample-id-all.c b/tools/perf/tests/parse-no-sample-id-all.c
> > index 50e68b7d43aa..d5a8d065809e 100644
> > --- a/tools/perf/tests/parse-no-sample-id-all.c
> > +++ b/tools/perf/tests/parse-no-sample-id-all.c
> > @@ -49,7 +49,7 @@ static int process_events(union perf_event **events, size_t count)
> > for (i = 0; i < count && !err; i++)
> > err = process_event(&evlist, events[i]);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> >
> > return err;
> > }
> > diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
> > index efbd9cd60c63..babec674b83c 100644
> > --- a/tools/perf/tests/perf-record.c
> > +++ b/tools/perf/tests/perf-record.c
> > @@ -102,7 +102,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > err = evlist__create_maps(evlist, &opts.target);
> > if (err < 0) {
> > pr_debug("Not enough memory to create thread/cpu maps\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > /*
> > @@ -114,7 +114,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > err = evlist__prepare_workload(evlist, &opts.target, argv, false, NULL);
> > if (err < 0) {
> > pr_debug("Couldn't run the workload!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > /*
> > @@ -131,7 +131,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("sched__get_first_possible_cpu: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > evlist__cancel_workload(evlist);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > cpu = err;
> > @@ -143,7 +143,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("sched_setaffinity: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > evlist__cancel_workload(evlist);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > /*
> > @@ -155,7 +155,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("perf_evlist__open: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > evlist__cancel_workload(evlist);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > /*
> > @@ -168,7 +168,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("evlist__mmap: %s\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > evlist__cancel_workload(evlist);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > /*
> > @@ -206,7 +206,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > if (verbose > 0)
> > perf_event__fprintf(event, NULL, stderr);
> > pr_debug("Couldn't parse sample\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (verbose > 0) {
> > @@ -346,9 +346,9 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> > pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
> > ++errs;
> > }
> > -out_delete_evlist:
> > +out_put_evlist:
> > CPU_FREE(cpu_mask);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > out:
> > perf_sample__exit(&sample);
> > if (err == -EACCES)
> > diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
> > index cca41bd37ae3..d3538fa20af3 100644
> > --- a/tools/perf/tests/perf-time-to-tsc.c
> > +++ b/tools/perf/tests/perf-time-to-tsc.c
> > @@ -201,7 +201,7 @@ static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int su
> > err = TEST_OK;
> >
> > out_err:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > return err;
> > diff --git a/tools/perf/tests/pfm.c b/tools/perf/tests/pfm.c
> > index 2e38dfa34b6c..099a50dec37e 100644
> > --- a/tools/perf/tests/pfm.c
> > +++ b/tools/perf/tests/pfm.c
> > @@ -79,7 +79,7 @@ static int test__pfm_events(struct test_suite *test __maybe_unused,
> > evlist__nr_groups(evlist),
> > 0);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > return 0;
> > }
> > @@ -164,7 +164,7 @@ static int test__pfm_group(struct test_suite *test __maybe_unused,
> > evlist__nr_groups(evlist),
> > table[i].nr_groups);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > return 0;
> > }
> > diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
> > index f40a828c9861..ab547f301c61 100644
> > --- a/tools/perf/tests/pmu-events.c
> > +++ b/tools/perf/tests/pmu-events.c
> > @@ -797,7 +797,7 @@ static int check_parse_id(const char *id, struct parse_events_error *error)
> > /*warn_if_reordered=*/true, /*fake_tp=*/false);
> > free(dup);
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > @@ -844,7 +844,7 @@ static int test__parsing_callback(const struct pmu_metric *pm,
> >
> > cpus = perf_cpu_map__new("0");
> > if (!cpus) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return -ENOMEM;
> > }
> >
> > @@ -901,7 +901,7 @@ static int test__parsing_callback(const struct pmu_metric *pm,
> > /* ... cleanup. */
> > evlist__free_stats(evlist);
> > perf_cpu_map__put(cpus);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
> > index cbded2c6faa4..bd3f4a2806ed 100644
> > --- a/tools/perf/tests/pmu.c
> > +++ b/tools/perf/tests/pmu.c
> > @@ -249,7 +249,7 @@ static int test__pmu_events(struct test_suite *test __maybe_unused, int subtest
> > ret = TEST_OK;
> > err_out:
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > test_pmu_put(dir, pmu);
> > return ret;
> > }
> > diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
> > index 4a2ad7176fa0..f7f1f16638b4 100644
> > --- a/tools/perf/tests/sw-clock.c
> > +++ b/tools/perf/tests/sw-clock.c
> > @@ -58,7 +58,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> > evsel = evsel__new(&attr);
> > if (evsel == NULL) {
> > pr_debug("evsel__new\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> > evlist__add(evlist, evsel);
> >
> > @@ -67,7 +67,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> > if (!cpus || !threads) {
> > err = -ENOMEM;
> > pr_debug("Not enough memory to create thread/cpu maps\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > perf_evlist__set_maps(&evlist->core, cpus, threads);
> > @@ -79,14 +79,14 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> > pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
> > str_error_r(errno, sbuf, sizeof(sbuf)),
> > knob, (u64)attr.sample_freq);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > err = evlist__mmap(evlist, 128);
> > if (err < 0) {
> > pr_debug("failed to mmap event: %d (%s)\n", errno,
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__enable(evlist);
> > @@ -112,7 +112,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> > if (err < 0) {
> > pr_debug("Error during parse sample\n");
> > perf_sample__exit(&sample);
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > total_periods += sample.period;
> > @@ -130,10 +130,10 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> > err = -1;
> > }
> >
> > -out_delete_evlist:
> > +out_put_evlist:
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
> > index 15791fcb76b2..c3d5825df0a8 100644
> > --- a/tools/perf/tests/switch-tracking.c
> > +++ b/tools/perf/tests/switch-tracking.c
> > @@ -577,7 +577,7 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
> > out:
> > if (evlist) {
> > evlist__disable(evlist);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
> > index 4053ff2813bb..a46650b10689 100644
> > --- a/tools/perf/tests/task-exit.c
> > +++ b/tools/perf/tests/task-exit.c
> > @@ -74,7 +74,7 @@ static int test__task_exit(struct test_suite *test __maybe_unused, int subtest _
> > if (!cpus || !threads) {
> > err = -ENOMEM;
> > pr_debug("Not enough memory to create thread/cpu maps\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > perf_evlist__set_maps(&evlist->core, cpus, threads);
> > @@ -82,7 +82,7 @@ static int test__task_exit(struct test_suite *test __maybe_unused, int subtest _
> > err = evlist__prepare_workload(evlist, &target, argv, false, workload_exec_failed_signal);
> > if (err < 0) {
> > pr_debug("Couldn't run the workload!\n");
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evsel = evlist__first(evlist);
> > @@ -101,14 +101,14 @@ static int test__task_exit(struct test_suite *test __maybe_unused, int subtest _
> > if (err < 0) {
> > pr_debug("Couldn't open the evlist: %s\n",
> > str_error_r(-err, sbuf, sizeof(sbuf)));
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (evlist__mmap(evlist, 128) < 0) {
> > pr_debug("failed to mmap events: %d (%s)\n", errno,
> > str_error_r(errno, sbuf, sizeof(sbuf)));
> > err = -1;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist__start_workload(evlist);
> > @@ -133,7 +133,7 @@ static int test__task_exit(struct test_suite *test __maybe_unused, int subtest _
> > if (retry_count++ > 1000) {
> > pr_debug("Failed after retrying 1000 times\n");
> > err = -1;
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > goto retry;
> > @@ -144,10 +144,10 @@ static int test__task_exit(struct test_suite *test __maybe_unused, int subtest _
> > err = -1;
> > }
> >
> > -out_delete_evlist:
> > +out_put_evlist:
> > perf_cpu_map__put(cpus);
> > perf_thread_map__put(threads);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/tests/tool_pmu.c b/tools/perf/tests/tool_pmu.c
> > index 1e900ef92e37..e78ff9dcea97 100644
> > --- a/tools/perf/tests/tool_pmu.c
> > +++ b/tools/perf/tests/tool_pmu.c
> > @@ -67,7 +67,7 @@ static int do_test(enum tool_pmu_event ev, bool with_pmu)
> >
> > out:
> > parse_events_error__exit(&err);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
> > index af4618c3124a..b88447899021 100644
> > --- a/tools/perf/tests/topology.c
> > +++ b/tools/perf/tests/topology.c
> > @@ -55,7 +55,7 @@ static int session_write_header(char *path)
> > !perf_session__write_header(session, session->evlist,
> > perf_data__fd(&data), true));
> >
> > - evlist__delete(session->evlist);
> > + evlist__put(session->evlist);
> > perf_session__delete(session);
> >
> > return 0;
> > diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
> > index 25e2769b5e74..ed230cd44ba7 100644
> > --- a/tools/perf/util/cgroup.c
> > +++ b/tools/perf/util/cgroup.c
> > @@ -503,8 +503,8 @@ int evlist__expand_cgroup(struct evlist *evlist, const char *str, bool open_cgro
> > cgrp_event_expanded = true;
> >
> > out_err:
> > - evlist__delete(orig_list);
> > - evlist__delete(tmp_list);
> > + evlist__put(orig_list);
> > + evlist__put(tmp_list);
> > metricgroup__rblist_exit(&orig_metric_events);
> > release_cgroup_list();
> >
> > diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
> > index 3d2e437e1354..1166cdb00aca 100644
> > --- a/tools/perf/util/data-convert-bt.c
> > +++ b/tools/perf/util/data-convert-bt.c
> > @@ -1331,7 +1331,7 @@ static void cleanup_events(struct perf_session *session)
> > zfree(&evsel->priv);
> > }
> >
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > session->evlist = NULL;
> > }
> >
> > diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> > index d99a3f12606f..ea1f398c14e3 100644
> > --- a/tools/perf/util/evlist.c
> > +++ b/tools/perf/util/evlist.c
> > @@ -73,7 +73,7 @@ int sigqueue(pid_t pid, int sig, const union sigval value);
> > #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
> > #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
> >
> > -void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
> > +static void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
> > struct perf_thread_map *threads)
> > {
> > perf_evlist__init(&evlist->core);
> > @@ -85,6 +85,7 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
> > evlist->ctl_fd.pos = -1;
> > evlist->nr_br_cntr = -1;
> > metricgroup__rblist_init(&evlist->metric_events);
> > + refcount_set(&evlist->refcnt, 1);
> > }
> >
> > struct evlist *evlist__new(void)
> > @@ -116,7 +117,7 @@ struct evlist *evlist__new_default(void)
> > can_profile_kernel ? "P" : "Pu");
> > err = parse_event(evlist, buf);
> > if (err) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return NULL;
> > }
> > }
> > @@ -136,13 +137,19 @@ struct evlist *evlist__new_dummy(void)
> > struct evlist *evlist = evlist__new();
> >
> > if (evlist && evlist__add_dummy(evlist)) {
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > evlist = NULL;
> > }
> >
> > return evlist;
> > }
> >
> > +struct evlist *evlist__get(struct evlist *evlist)
> > +{
> > + refcount_inc(&evlist->refcnt);
> > + return evlist;
> > +}
> > +
> > /**
> > * evlist__set_id_pos - set the positions of event ids.
> > * @evlist: selected event list
> > @@ -181,7 +188,7 @@ static void evlist__purge(struct evlist *evlist)
> > evlist->core.nr_entries = 0;
> > }
> >
> > -void evlist__exit(struct evlist *evlist)
> > +static void evlist__exit(struct evlist *evlist)
> > {
> > metricgroup__rblist_exit(&evlist->metric_events);
> > event_enable_timer__exit(&evlist->eet);
> > @@ -190,11 +197,14 @@ void evlist__exit(struct evlist *evlist)
> > perf_evlist__exit(&evlist->core);
> > }
> >
> > -void evlist__delete(struct evlist *evlist)
> > +void evlist__put(struct evlist *evlist)
> > {
> > if (evlist == NULL)
> > return;
> >
> > + if (!refcount_dec_and_test(&evlist->refcnt))
> > + return;
> > +
> > evlist__free_stats(evlist);
> > evlist__munmap(evlist);
> > evlist__close(evlist);
> > diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
> > index 61acbb10d9a5..66fb5da08160 100644
> > --- a/tools/perf/util/evlist.h
> > +++ b/tools/perf/util/evlist.h
> > @@ -59,6 +59,7 @@ struct event_enable_timer;
> >
> > struct evlist {
> > struct perf_evlist core;
> > + refcount_t refcnt;
> > bool enabled;
> > int id_pos;
> > int is_pos;
> > @@ -104,10 +105,8 @@ struct evsel_str_handler {
> > struct evlist *evlist__new(void);
> > struct evlist *evlist__new_default(void);
> > struct evlist *evlist__new_dummy(void);
> > -void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
> > - struct perf_thread_map *threads);
> > -void evlist__exit(struct evlist *evlist);
> > -void evlist__delete(struct evlist *evlist);
> > +struct evlist *evlist__get(struct evlist *evlist);
> > +void evlist__put(struct evlist *evlist);
> >
> > void evlist__add(struct evlist *evlist, struct evsel *entry);
> > void evlist__remove(struct evlist *evlist, struct evsel *evsel);
> > diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> > index 7fda0ff89c16..4304b53b5a37 100644
> > --- a/tools/perf/util/expr.c
> > +++ b/tools/perf/util/expr.c
> > @@ -451,7 +451,7 @@ double expr__has_event(const struct expr_parse_ctx *ctx, bool compute_ids, const
> > ret = parse_event(tmp, id) ? 0 : 1;
> > }
> > out:
> > - evlist__delete(tmp);
> > + evlist__put(tmp);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> > index 4f2a6e10ed5c..e959ddb12dc8 100644
> > --- a/tools/perf/util/header.c
> > +++ b/tools/perf/util/header.c
> > @@ -4307,12 +4307,12 @@ int perf_session__read_header(struct perf_session *session)
> > evsel = evsel__new(&f_attr.attr);
> >
> > if (evsel == NULL)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > evsel->needs_swap = header->needs_swap;
> > /*
> > * Do it before so that if perf_evsel__alloc_id fails, this
> > - * entry gets purged too at evlist__delete().
> > + * entry gets purged too at evlist__put().
> > */
> > evlist__add(session->evlist, evsel);
> >
> > @@ -4323,7 +4323,7 @@ int perf_session__read_header(struct perf_session *session)
> > * hattr->ids threads.
> > */
> > if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > lseek(fd, f_attr.ids.offset, SEEK_SET);
> >
> > @@ -4342,7 +4342,7 @@ int perf_session__read_header(struct perf_session *session)
> > perf_file_section__process);
> >
> > if (evlist__prepare_tracepoint_events(session->evlist, session->tevent.pevent))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > #else
> > perf_header__process_sections(header, fd, NULL, perf_file_section__process);
> > #endif
> > @@ -4351,8 +4351,8 @@ int perf_session__read_header(struct perf_session *session)
> > out_errno:
> > return -errno;
> >
> > -out_delete_evlist:
> > - evlist__delete(session->evlist);
> > +out_put_evlist:
> > + evlist__put(session->evlist);
> > session->evlist = NULL;
> > return -ENOMEM;
> > }
> > diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> > index 595b83142d2c..64c64dff7424 100644
> > --- a/tools/perf/util/metricgroup.c
> > +++ b/tools/perf/util/metricgroup.c
> > @@ -212,7 +212,7 @@ static void metric__free(struct metric *m)
> > zfree(&m->metric_refs);
> > expr__ctx_free(m->pctx);
> > zfree(&m->modifier);
> > - evlist__delete(m->evlist);
> > + evlist__put(m->evlist);
> > free(m);
> > }
> >
> > @@ -1318,7 +1318,7 @@ static int parse_ids(bool metric_no_merge, bool fake_pmu,
> > parsed_evlist = NULL;
> > err_out:
> > parse_events_error__exit(&parse_error);
> > - evlist__delete(parsed_evlist);
> > + evlist__put(parsed_evlist);
> > strbuf_release(&events);
> > return ret;
> > }
> > @@ -1470,7 +1470,7 @@ static int parse_groups(struct evlist *perf_evlist,
> >
> > if (combined_evlist) {
> > evlist__splice_list_tail(perf_evlist, &combined_evlist->core.entries);
> > - evlist__delete(combined_evlist);
> > + evlist__put(combined_evlist);
> > }
> >
> > list_for_each_entry(m, &metric_list, nd) {
> > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> > index 0c0dc20b1c13..607ab7b82486 100644
> > --- a/tools/perf/util/parse-events.c
> > +++ b/tools/perf/util/parse-events.c
> > @@ -2223,7 +2223,7 @@ int __parse_events(struct evlist *evlist, const char *str, const char *pmu_filte
> >
> > /*
> > * There are 2 users - builtin-record and builtin-test objects.
> > - * Both call evlist__delete in case of error, so we dont
> > + * Both call evlist__put in case of error, so we dont
> > * need to bother.
> > */
> > return ret;
> > @@ -2424,7 +2424,7 @@ int parse_events_option_new_evlist(const struct option *opt, const char *str, in
> > }
> > ret = parse_events_option(opt, str, unset);
> > if (ret) {
> > - evlist__delete(*args->evlistp);
> > + evlist__put(*args->evlistp);
> > *args->evlistp = NULL;
> > }
> >
> > diff --git a/tools/perf/util/perf_api_probe.c b/tools/perf/util/perf_api_probe.c
> > index 3345145a9307..8cd254d36220 100644
> > --- a/tools/perf/util/perf_api_probe.c
> > +++ b/tools/perf/util/perf_api_probe.c
> > @@ -56,7 +56,7 @@ static int perf_do_probe_api(setup_probe_fn_t fn, struct perf_cpu cpu, const cha
> > err = 0;
> >
> > out_delete:
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > return err;
> > }
> >
> > diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> > index dfc6e9299af9..4149a51e9878 100644
> > --- a/tools/perf/util/python.c
> > +++ b/tools/perf/util/python.c
> > @@ -1273,7 +1273,7 @@ static int pyrf_evsel__setup_types(void)
> > struct pyrf_evlist {
> > PyObject_HEAD
> >
> > - struct evlist evlist;
> > + struct evlist *evlist;
> > };
> >
> > static int pyrf_evlist__init(struct pyrf_evlist *pevlist,
> > @@ -1286,15 +1286,21 @@ static int pyrf_evlist__init(struct pyrf_evlist *pevlist,
> > if (!PyArg_ParseTuple(args, "OO", &pcpus, &pthreads))
> > return -1;
> >
> > + pevlist->evlist = evlist__new();
> > + if (!pevlist->evlist) {
> > + PyErr_NoMemory();
> > + return -1;
> > + }
> > threads = ((struct pyrf_thread_map *)pthreads)->threads;
> > cpus = ((struct pyrf_cpu_map *)pcpus)->cpus;
> > - evlist__init(&pevlist->evlist, cpus, threads);
> > + perf_evlist__set_maps(&pevlist->evlist->core, cpus, threads);
> > +
> > return 0;
> > }
> >
> > static void pyrf_evlist__delete(struct pyrf_evlist *pevlist)
> > {
> > - evlist__exit(&pevlist->evlist);
> > + evlist__put(pevlist->evlist);
> > Py_TYPE(pevlist)->tp_free((PyObject*)pevlist);
> > }
> >
> > @@ -1303,7 +1309,7 @@ static PyObject *pyrf_evlist__all_cpus(struct pyrf_evlist *pevlist)
> > struct pyrf_cpu_map *pcpu_map = PyObject_New(struct pyrf_cpu_map, &pyrf_cpu_map__type);
> >
> > if (pcpu_map)
> > - pcpu_map->cpus = perf_cpu_map__get(pevlist->evlist.core.all_cpus);
> > + pcpu_map->cpus = perf_cpu_map__get(pevlist->evlist->core.all_cpus);
> >
> > return (PyObject *)pcpu_map;
> > }
> > @@ -1316,7 +1322,7 @@ static PyObject *pyrf_evlist__metrics(struct pyrf_evlist *pevlist)
> > if (!list)
> > return NULL;
> >
> > - for (node = rb_first_cached(&pevlist->evlist.metric_events.entries); node;
> > + for (node = rb_first_cached(&pevlist->evlist->metric_events.entries); node;
> > node = rb_next(node)) {
> > struct metric_event *me = container_of(node, struct metric_event, nd);
> > struct list_head *pos;
> > @@ -1400,7 +1406,7 @@ static PyObject *pyrf_evlist__compute_metric(struct pyrf_evlist *pevlist,
> > if (!PyArg_ParseTuple(args, "sii", &metric, &cpu, &thread))
> > return NULL;
> >
> > - for (node = rb_first_cached(&pevlist->evlist.metric_events.entries);
> > + for (node = rb_first_cached(&pevlist->evlist->metric_events.entries);
> > mexp == NULL && node;
> > node = rb_next(node)) {
> > struct metric_event *me = container_of(node, struct metric_event, nd);
> > @@ -1456,7 +1462,7 @@ static PyObject *pyrf_evlist__compute_metric(struct pyrf_evlist *pevlist,
> > static PyObject *pyrf_evlist__mmap(struct pyrf_evlist *pevlist,
> > PyObject *args, PyObject *kwargs)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> > static char *kwlist[] = { "pages", "overwrite", NULL };
> > int pages = 128, overwrite = false;
> >
> > @@ -1476,7 +1482,7 @@ static PyObject *pyrf_evlist__mmap(struct pyrf_evlist *pevlist,
> > static PyObject *pyrf_evlist__poll(struct pyrf_evlist *pevlist,
> > PyObject *args, PyObject *kwargs)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> > static char *kwlist[] = { "timeout", NULL };
> > int timeout = -1, n;
> >
> > @@ -1496,7 +1502,7 @@ static PyObject *pyrf_evlist__get_pollfd(struct pyrf_evlist *pevlist,
> > PyObject *args __maybe_unused,
> > PyObject *kwargs __maybe_unused)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> > PyObject *list = PyList_New(0);
> > int i;
> >
> > @@ -1525,7 +1531,7 @@ static PyObject *pyrf_evlist__add(struct pyrf_evlist *pevlist,
> > PyObject *args,
> > PyObject *kwargs __maybe_unused)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> > PyObject *pevsel;
> > struct evsel *evsel;
> >
> > @@ -1557,7 +1563,7 @@ static struct mmap *get_md(struct evlist *evlist, int cpu)
> > static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
> > PyObject *args, PyObject *kwargs)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> > union perf_event *event;
> > int sample_id_all = 1, cpu;
> > static char *kwlist[] = { "cpu", "sample_id_all", NULL };
> > @@ -1614,7 +1620,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
> > static PyObject *pyrf_evlist__open(struct pyrf_evlist *pevlist,
> > PyObject *args, PyObject *kwargs)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> >
> > if (evlist__open(evlist) < 0) {
> > PyErr_SetFromErrno(PyExc_OSError);
> > @@ -1627,7 +1633,7 @@ static PyObject *pyrf_evlist__open(struct pyrf_evlist *pevlist,
> >
> > static PyObject *pyrf_evlist__close(struct pyrf_evlist *pevlist)
> > {
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> >
> > evlist__close(evlist);
> >
> > @@ -1653,7 +1659,7 @@ static PyObject *pyrf_evlist__config(struct pyrf_evlist *pevlist)
> > .no_buffering = true,
> > .no_inherit = true,
> > };
> > - struct evlist *evlist = &pevlist->evlist;
> > + struct evlist *evlist = pevlist->evlist;
> >
> > evlist__config(evlist, &opts, &callchain_param);
> > Py_INCREF(Py_None);
> > @@ -1662,14 +1668,14 @@ static PyObject *pyrf_evlist__config(struct pyrf_evlist *pevlist)
> >
> > static PyObject *pyrf_evlist__disable(struct pyrf_evlist *pevlist)
> > {
> > - evlist__disable(&pevlist->evlist);
> > + evlist__disable(pevlist->evlist);
> > Py_INCREF(Py_None);
> > return Py_None;
> > }
> >
> > static PyObject *pyrf_evlist__enable(struct pyrf_evlist *pevlist)
> > {
> > - evlist__enable(&pevlist->evlist);
> > + evlist__enable(pevlist->evlist);
> > Py_INCREF(Py_None);
> > return Py_None;
> > }
> > @@ -1760,7 +1766,23 @@ static Py_ssize_t pyrf_evlist__length(PyObject *obj)
> > {
> > struct pyrf_evlist *pevlist = (void *)obj;
> >
> > - return pevlist->evlist.core.nr_entries;
> > + return pevlist->evlist->core.nr_entries;
> > +}
> > +
> > +static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel)
> > +{
> > + struct pyrf_evsel *pevsel = PyObject_New(struct pyrf_evsel, &pyrf_evsel__type);
> > +
> > + if (!pevsel)
> > + return NULL;
> > +
> > + memset(&pevsel->evsel, 0, sizeof(pevsel->evsel));
> > + evsel__init(&pevsel->evsel, &evsel->core.attr, evsel->core.idx);
> > +
> > + evsel__clone(&pevsel->evsel, evsel);
> > + if (evsel__is_group_leader(evsel))
> > + evsel__set_leader(&pevsel->evsel, &pevsel->evsel);
> > + return (PyObject *)pevsel;
> > }
> >
> > static PyObject *pyrf_evlist__item(PyObject *obj, Py_ssize_t i)
> > @@ -1768,17 +1790,16 @@ static PyObject *pyrf_evlist__item(PyObject *obj, Py_ssize_t i)
> > struct pyrf_evlist *pevlist = (void *)obj;
> > struct evsel *pos;
> >
> > - if (i >= pevlist->evlist.core.nr_entries) {
> > + if (i >= pevlist->evlist->core.nr_entries) {
> > PyErr_SetString(PyExc_IndexError, "Index out of range");
> > return NULL;
> > }
> >
> > - evlist__for_each_entry(&pevlist->evlist, pos) {
> > + evlist__for_each_entry(pevlist->evlist, pos) {
> > if (i-- == 0)
> > break;
> > }
> > -
> > - return Py_BuildValue("O", container_of(pos, struct pyrf_evsel, evsel));
> > + return pyrf_evsel__from_evsel(pos);
> > }
> >
> > static PyObject *pyrf_evlist__str(PyObject *self)
> > @@ -1790,7 +1811,7 @@ static PyObject *pyrf_evlist__str(PyObject *self)
> > PyObject *result;
> >
> > strbuf_addstr(&sb, "evlist([");
> > - evlist__for_each_entry(&pevlist->evlist, pos) {
> > + evlist__for_each_entry(pevlist->evlist, pos) {
> > if (!first)
> > strbuf_addch(&sb, ',');
> > if (!pos->pmu)
> > @@ -1931,110 +1952,30 @@ static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,
> > return PyLong_FromLong(tp_pmu__id(sys, name));
> > }
> >
> > -static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel)
> > -{
> > - struct pyrf_evsel *pevsel = PyObject_New(struct pyrf_evsel, &pyrf_evsel__type);
> > -
> > - if (!pevsel)
> > - return NULL;
> > -
> > - memset(&pevsel->evsel, 0, sizeof(pevsel->evsel));
> > - evsel__init(&pevsel->evsel, &evsel->core.attr, evsel->core.idx);
> > -
> > - evsel__clone(&pevsel->evsel, evsel);
> > - if (evsel__is_group_leader(evsel))
> > - evsel__set_leader(&pevsel->evsel, &pevsel->evsel);
> > - return (PyObject *)pevsel;
> > -}
> > -
> > -static int evlist__pos(struct evlist *evlist, struct evsel *evsel)
> > -{
> > - struct evsel *pos;
> > - int idx = 0;
> > -
> > - evlist__for_each_entry(evlist, pos) {
> > - if (evsel == pos)
> > - return idx;
> > - idx++;
> > - }
> > - return -1;
> > -}
> > -
> > -static struct evsel *evlist__at(struct evlist *evlist, int idx)
> > -{
> > - struct evsel *pos;
> > - int idx2 = 0;
> > -
> > - evlist__for_each_entry(evlist, pos) {
> > - if (idx == idx2)
> > - return pos;
> > - idx2++;
> > - }
> > - return NULL;
> > -}
> > -
> > static PyObject *pyrf_evlist__from_evlist(struct evlist *evlist)
> > {
> > struct pyrf_evlist *pevlist = PyObject_New(struct pyrf_evlist, &pyrf_evlist__type);
> > - struct evsel *pos;
> > - struct rb_node *node;
> >
> > if (!pevlist)
> > return NULL;
> >
> > - memset(&pevlist->evlist, 0, sizeof(pevlist->evlist));
> > - evlist__init(&pevlist->evlist, evlist->core.all_cpus, evlist->core.threads);
> > - evlist__for_each_entry(evlist, pos) {
> > - struct pyrf_evsel *pevsel = (void *)pyrf_evsel__from_evsel(pos);
> > -
> > - evlist__add(&pevlist->evlist, &pevsel->evsel);
> > - }
> > - evlist__for_each_entry(&pevlist->evlist, pos) {
> > - struct evsel *leader = evsel__leader(pos);
> > -
> > - if (pos != leader) {
> > - int idx = evlist__pos(evlist, leader);
> > -
> > - if (idx >= 0)
> > - evsel__set_leader(pos, evlist__at(&pevlist->evlist, idx));
> > - else if (leader == NULL)
> > - evsel__set_leader(pos, pos);
> > - }
> > - }
> > - metricgroup__copy_metric_events(&pevlist->evlist, /*cgrp=*/NULL,
> > - &pevlist->evlist.metric_events,
> > - &evlist->metric_events);
> > - for (node = rb_first_cached(&pevlist->evlist.metric_events.entries); node;
> > - node = rb_next(node)) {
> > - struct metric_event *me = container_of(node, struct metric_event, nd);
> > - struct list_head *mpos;
> > - int idx = evlist__pos(evlist, me->evsel);
> > -
> > - if (idx >= 0)
> > - me->evsel = evlist__at(&pevlist->evlist, idx);
> > - list_for_each(mpos, &me->head) {
> > - struct metric_expr *e = container_of(mpos, struct metric_expr, nd);
> > -
> > - for (int j = 0; e->metric_events[j]; j++) {
> > - idx = evlist__pos(evlist, e->metric_events[j]);
> > - if (idx >= 0)
> > - e->metric_events[j] = evlist__at(&pevlist->evlist, idx);
> > - }
> > - }
> > - }
> > + pevlist->evlist = evlist__get(evlist);
> > return (PyObject *)pevlist;
> > }
> >
> > static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
> > {
> > const char *input;
> > - struct evlist evlist = {};
> > + struct evlist *evlist = evlist__new();
> > struct parse_events_error err;
> > PyObject *result;
> > PyObject *pcpus = NULL, *pthreads = NULL;
> > struct perf_cpu_map *cpus;
> > struct perf_thread_map *threads;
> >
> > + if (!evlist)
> > + return PyErr_NoMemory();
> > +
> > if (!PyArg_ParseTuple(args, "s|OO", &input, &pcpus, &pthreads))
> > return NULL;
> >
> > @@ -2042,35 +1983,38 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
> > cpus = pcpus ? ((struct pyrf_cpu_map *)pcpus)->cpus : NULL;
> >
> > parse_events_error__init(&err);
> > - evlist__init(&evlist, cpus, threads);
> > - if (parse_events(&evlist, input, &err)) {
> > + perf_evlist__set_maps(&evlist->core, cpus, threads);
> > + if (parse_events(evlist, input, &err)) {
> > parse_events_error__print(&err, input);
> > PyErr_SetFromErrno(PyExc_OSError);
> > return NULL;
> > }
> > - result = pyrf_evlist__from_evlist(&evlist);
> > - evlist__exit(&evlist);
> > + result = pyrf_evlist__from_evlist(evlist);
> > + evlist__put(evlist);
> > return result;
> > }
> >
> > static PyObject *pyrf__parse_metrics(PyObject *self, PyObject *args)
> > {
> > const char *input, *pmu = NULL;
> > - struct evlist evlist = {};
> > + struct evlist *evlist = evlist__new();
> > PyObject *result;
> > PyObject *pcpus = NULL, *pthreads = NULL;
> > struct perf_cpu_map *cpus;
> > struct perf_thread_map *threads;
> > int ret;
> >
> > + if (!evlist)
> > + return PyErr_NoMemory();
> > +
> > if (!PyArg_ParseTuple(args, "s|sOO", &input, &pmu, &pcpus, &pthreads))
> > return NULL;
> >
> > threads = pthreads ? ((struct pyrf_thread_map *)pthreads)->threads : NULL;
> > cpus = pcpus ? ((struct pyrf_cpu_map *)pcpus)->cpus : NULL;
> >
> > - evlist__init(&evlist, cpus, threads);
> > - ret = metricgroup__parse_groups(&evlist, pmu ?: "all", input,
> > + perf_evlist__set_maps(&evlist->core, cpus, threads);
> > + ret = metricgroup__parse_groups(evlist, pmu ?: "all", input,
> > /*metric_no_group=*/ false,
> > /*metric_no_merge=*/ false,
> > /*metric_no_threshold=*/ true,
> > @@ -2082,8 +2026,8 @@ static PyObject *pyrf__parse_metrics(PyObject *self, PyObject *args)
> > PyErr_SetFromErrno(PyExc_OSError);
> > return NULL;
> > }
> > - result = pyrf_evlist__from_evlist(&evlist);
> > - evlist__exit(&evlist);
> > + result = pyrf_evlist__from_evlist(evlist);
> > + evlist__put(evlist);
> > return result;
> > }
> >
> > diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
> > index e867de8ddaaa..8a5fc7d5e43c 100644
> > --- a/tools/perf/util/record.c
> > +++ b/tools/perf/util/record.c
> > @@ -264,7 +264,7 @@ bool evlist__can_select_event(struct evlist *evlist, const char *str)
> > ret = true;
> >
> > out_delete:
> > - evlist__delete(temp_evlist);
> > + evlist__put(temp_evlist);
> > return ret;
> > }
> >
> > diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> > index 081e68c72c30..f241d91221d7 100644
> > --- a/tools/perf/util/session.c
> > +++ b/tools/perf/util/session.c
> > @@ -256,7 +256,7 @@ void perf_session__delete(struct perf_session *session)
> > machines__exit(&session->machines);
> > if (session->data) {
> > if (perf_data__is_read(session->data))
> > - evlist__delete(session->evlist);
> > + evlist__put(session->evlist);
> > perf_data__close(session->data);
> > }
> > #ifdef HAVE_LIBTRACEEVENT
> > diff --git a/tools/perf/util/sideband_evlist.c b/tools/perf/util/sideband_evlist.c
> > index 388846f17bc1..b84a5463e039 100644
> > --- a/tools/perf/util/sideband_evlist.c
> > +++ b/tools/perf/util/sideband_evlist.c
> > @@ -102,7 +102,7 @@ int evlist__start_sb_thread(struct evlist *evlist, struct target *target)
> > return 0;
> >
> > if (evlist__create_maps(evlist, target))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > if (evlist->core.nr_entries > 1) {
> > bool can_sample_identifier = perf_can_sample_identifier();
> > @@ -116,25 +116,25 @@ int evlist__start_sb_thread(struct evlist *evlist, struct target *target)
> > evlist__for_each_entry(evlist, counter) {
> > if (evsel__open(counter, evlist->core.user_requested_cpus,
> > evlist->core.threads) < 0)
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > if (evlist__mmap(evlist, UINT_MAX))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > evlist__for_each_entry(evlist, counter) {
> > if (evsel__enable(counter))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> > }
> >
> > evlist->thread.done = 0;
> > if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist))
> > - goto out_delete_evlist;
> > + goto out_put_evlist;
> >
> > return 0;
> >
> > -out_delete_evlist:
> > - evlist__delete(evlist);
> > +out_put_evlist:
> > + evlist__put(evlist);
> > evlist = NULL;
> > return -1;
> > }
> > @@ -145,5 +145,5 @@ void evlist__stop_sb_thread(struct evlist *evlist)
> > return;
> > evlist->thread.done = 1;
> > pthread_join(evlist->thread.th, NULL);
> > - evlist__delete(evlist);
> > + evlist__put(evlist);
> > }
> > --
> > 2.51.1.851.g4ebd6896fd-goog
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