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perf bpf: Decouple creating the evlist from adding the SB event

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Renaming bpf_event__add_sb_event() to evlist__add_sb_event() and
requiring that the evlist be allocated beforehand.

This will allow using the same side band thread and evlist to be used
for multiple purposes in addition to react to PERF_RECORD_BPF_EVENT soon
after they are generated.

Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: http://lore.kernel.org/lkml/20200429131106.27974-4-acme@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2020-04-24 12:24:51 -03:00
parent ca6c9c8b10
commit b38d85ef49
6 changed files with 36 additions and 29 deletions
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21
tools/perf/util/evlist.c
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@@ -1705,39 +1705,26 @@ struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list,
return leader;
}
int perf_evlist__add_sb_event(struct evlist **evlist,
int perf_evlist__add_sb_event(struct evlist *evlist,
struct perf_event_attr *attr,
perf_evsel__sb_cb_t cb,
void *data)
{
struct evsel *evsel;
bool new_evlist = (*evlist) == NULL;
if (*evlist == NULL)
*evlist = evlist__new();
if (*evlist == NULL)
return -1;
if (!attr->sample_id_all) {
pr_warning("enabling sample_id_all for all side band events\n");
attr->sample_id_all = 1;
}
evsel = perf_evsel__new_idx(attr, (*evlist)->core.nr_entries);
evsel = perf_evsel__new_idx(attr, evlist->core.nr_entries);
if (!evsel)
goto out_err;
return -1;
evsel->side_band.cb = cb;
evsel->side_band.data = data;
evlist__add(*evlist, evsel);
evlist__add(evlist, evsel);
return 0;
out_err:
if (new_evlist) {
evlist__delete(*evlist);
*evlist = NULL;
}
return -1;
}
static void *perf_evlist__poll_thread(void *arg)