diff options
| -rw-r--r-- | tools/perf/util/evsel.c | 10 | ||||
| -rw-r--r-- | tools/perf/util/evsel.h | 1 |
2 files changed, 10 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index e1bc76ece117..5776bfa70f11 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1161,6 +1161,7 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts, attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; attr->inherit = !opts->no_inherit; attr->write_backward = opts->overwrite ? 1 : 0; + attr->read_format = PERF_FORMAT_LOST; evsel__set_sample_bit(evsel, IP); evsel__set_sample_bit(evsel, TID); @@ -1856,6 +1857,8 @@ static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus, static void evsel__disable_missing_features(struct evsel *evsel) { + if (perf_missing_features.read_lost) + evsel->core.attr.read_format &= ~PERF_FORMAT_LOST; if (perf_missing_features.weight_struct) { evsel__set_sample_bit(evsel, WEIGHT); evsel__reset_sample_bit(evsel, WEIGHT_STRUCT); @@ -1907,7 +1910,12 @@ bool evsel__detect_missing_features(struct evsel *evsel) * Must probe features in the order they were added to the * perf_event_attr interface. */ - if (!perf_missing_features.weight_struct && + if (!perf_missing_features.read_lost && + (evsel->core.attr.read_format & PERF_FORMAT_LOST)) { + perf_missing_features.read_lost = true; + pr_debug2("switching off PERF_FORMAT_LOST support\n"); + return true; + } else if (!perf_missing_features.weight_struct && (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) { perf_missing_features.weight_struct = true; pr_debug2("switching off weight struct support\n"); diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index d927713b513e..989865e16aad 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -188,6 +188,7 @@ struct perf_missing_features { bool data_page_size; bool code_page_size; bool weight_struct; + bool read_lost; }; extern struct perf_missing_features perf_missing_features; |