Messages in this thread Patch in this message | | | From | Alexey Bayduraev <> | Subject | [PATCH v7 08/20] perf record: Init data file at mmap buffer object | Date | Tue, 22 Jun 2021 11:42:17 +0300 |
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Initialize data files located at mmap buffer objects so trace data can be written into several data file located at data directory.
Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com> --- tools/perf/builtin-record.c | 41 ++++++++++++++++++++++++++++++------- tools/perf/util/record.h | 1 + 2 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index c9fd31211600..1b6716778650 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -160,6 +160,11 @@ static const char *affinity_tags[PERF_AFFINITY_MAX] = { "SYS", "NODE", "CPU" }; +static int record__threads_enabled(struct record *rec) +{ + return rec->opts.threads_spec; +} + static bool switch_output_signal(struct record *rec) { return rec->switch_output.signal && @@ -1070,7 +1075,7 @@ static void record__free_thread_data(struct record *rec) static int record__mmap_evlist(struct record *rec, struct evlist *evlist) { - int ret; + int i, ret; struct record_opts *opts = &rec->opts; bool auxtrace_overwrite = opts->auxtrace_snapshot_mode || opts->auxtrace_sample_mode; @@ -1109,6 +1114,18 @@ static int record__mmap_evlist(struct record *rec, if (ret) return ret; + if (record__threads_enabled(rec)) { + ret = perf_data__create_dir(&rec->data, evlist->core.nr_mmaps); + if (ret) + return ret; + for (i = 0; i < evlist->core.nr_mmaps; i++) { + if (evlist->mmap) + evlist->mmap[i].file = &rec->data.dir.files[i]; + if (evlist->overwrite_mmap) + evlist->overwrite_mmap[i].file = &rec->data.dir.files[i]; + } + } + return 0; } @@ -1416,8 +1433,12 @@ static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, /* * Mark the round finished in case we wrote * at least one event. + * + * No need for round events in directory mode, + * because per-cpu maps and files have data + * sorted by kernel. */ - if (bytes_written != rec->bytes_written) + if (!record__threads_enabled(rec) && bytes_written != rec->bytes_written) rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); if (overwrite) @@ -1532,7 +1553,9 @@ static void record__init_features(struct record *rec) if (!rec->opts.use_clockid) perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA); - perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); + if (!record__threads_enabled(rec)) + perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); + if (!record__comp_enabled(rec)) perf_header__clear_feat(&session->header, HEADER_COMPRESSED); @@ -1543,15 +1566,21 @@ static void record__finish_output(struct record *rec) { struct perf_data *data = &rec->data; - int fd = perf_data__fd(data); + int i, fd = perf_data__fd(data); if (data->is_pipe) return; rec->session->header.data_size += rec->bytes_written; data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); + if (record__threads_enabled(rec)) { + for (i = 0; i < data->dir.nr; i++) + data->dir.files[i].size = lseek(data->dir.files[i].fd, 0, SEEK_CUR); + } if (!rec->no_buildid) { + /* this will be recalculated during process_buildids() */ + rec->samples = 0; process_buildids(rec); if (rec->buildid_all) @@ -2489,8 +2518,6 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) status = err; record__synthesize(rec, true); - /* this will be recalculated during process_buildids() */ - rec->samples = 0; if (!err) { if (!rec->timestamp_filename) { @@ -3277,7 +3304,7 @@ int cmd_record(int argc, const char **argv) rec->no_buildid = true; } - if (rec->opts.kcore) + if (rec->opts.kcore || record__threads_enabled(rec)) rec->data.is_dir = true; if (rec->opts.comp_level != 0) { diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h index 68f471d9a88b..4d68b7e27272 100644 --- a/tools/perf/util/record.h +++ b/tools/perf/util/record.h @@ -77,6 +77,7 @@ struct record_opts { int ctl_fd; int ctl_fd_ack; bool ctl_fd_close; + int threads_spec; }; extern const char * const *record_usage; -- 2.19.0
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