From 9a39994467d493eba38d8f69e42fd9c31cb1da9a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 5 May 2020 12:18:21 -0300 Subject: perf evlist: Move the sideband thread routines to separate object To avoid dragging more stuff into the perf python binding in the following csets. Reported-by: Jiri Olsa Cc: Adrian Hunter Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evlist.c | 117 ----------------------------------------------- 1 file changed, 117 deletions(-) (limited to 'tools/perf/util/evlist.c') diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 6fe11f4d856a..6d902c02fd95 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1704,120 +1704,3 @@ struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list, } return leader; } - -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; - - 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); - if (!evsel) - return -1; - - evsel->side_band.cb = cb; - evsel->side_band.data = data; - evlist__add(evlist, evsel); - return 0; -} - -static void *perf_evlist__poll_thread(void *arg) -{ - struct evlist *evlist = arg; - bool draining = false; - int i, done = 0; - /* - * In order to read symbols from other namespaces perf to needs to call - * setns(2). This isn't permitted if the struct_fs has multiple users. - * unshare(2) the fs so that we may continue to setns into namespaces - * that we're observing when, for instance, reading the build-ids at - * the end of a 'perf record' session. - */ - unshare(CLONE_FS); - - while (!done) { - bool got_data = false; - - if (evlist->thread.done) - draining = true; - - if (!draining) - evlist__poll(evlist, 1000); - - for (i = 0; i < evlist->core.nr_mmaps; i++) { - struct mmap *map = &evlist->mmap[i]; - union perf_event *event; - - if (perf_mmap__read_init(&map->core)) - continue; - while ((event = perf_mmap__read_event(&map->core)) != NULL) { - struct evsel *evsel = perf_evlist__event2evsel(evlist, event); - - if (evsel && evsel->side_band.cb) - evsel->side_band.cb(event, evsel->side_band.data); - else - pr_warning("cannot locate proper evsel for the side band event\n"); - - perf_mmap__consume(&map->core); - got_data = true; - } - perf_mmap__read_done(&map->core); - } - - if (draining && !got_data) - break; - } - return NULL; -} - -int perf_evlist__start_sb_thread(struct evlist *evlist, - struct target *target) -{ - struct evsel *counter; - - if (!evlist) - return 0; - - if (perf_evlist__create_maps(evlist, target)) - goto out_delete_evlist; - - evlist__for_each_entry(evlist, counter) { - if (evsel__open(counter, evlist->core.cpus, - evlist->core.threads) < 0) - goto out_delete_evlist; - } - - if (evlist__mmap(evlist, UINT_MAX)) - goto out_delete_evlist; - - evlist__for_each_entry(evlist, counter) { - if (evsel__enable(counter)) - goto out_delete_evlist; - } - - evlist->thread.done = 0; - if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist)) - goto out_delete_evlist; - - return 0; - -out_delete_evlist: - evlist__delete(evlist); - evlist = NULL; - return -1; -} - -void perf_evlist__stop_sb_thread(struct evlist *evlist) -{ - if (!evlist) - return; - evlist->thread.done = 1; - pthread_join(evlist->thread.th, NULL); - evlist__delete(evlist); -} -- cgit v1.2.3