| From 9ed7d21233c3ff18ccb79584b033344f245ed0a3 Mon Sep 17 00:00:00 2001 |
| From: Adrian Hunter <adrian.hunter@intel.com> |
| Date: Fri, 15 Nov 2019 14:42:20 +0200 |
| Subject: [PATCH 1/2] perf session: Add facility to peek at all events |
| |
| AUX area samples are not limited in how far back in time the sample |
| could start. Consequently samples must be queued in advance to allow for |
| time-ordered processing. To achieve that, add |
| perf_session__peek_events() that walks and peeks at all the events. |
| |
| Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> |
| Cc: Jiri Olsa <jolsa@redhat.com> |
| Link: http://lore.kernel.org/lkml/20191115124225.5247-11-adrian.hunter@intel.com |
| Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
| --- |
| tools/perf/util/session.c | 28 ++++++++++++++++++++++++++++ |
| tools/perf/util/session.h | 5 +++++ |
| 2 files changed, 33 insertions(+) |
| |
| diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c |
| index 37efa1f43d8b..2a845543d055 100644 |
| --- a/tools/perf/util/session.c |
| +++ b/tools/perf/util/session.c |
| @@ -1628,6 +1628,34 @@ out_parse_sample: |
| return 0; |
| } |
| |
| +int perf_session__peek_events(struct perf_session *session, u64 offset, |
| + u64 size, peek_events_cb_t cb, void *data) |
| +{ |
| + u64 max_offset = offset + size; |
| + char buf[PERF_SAMPLE_MAX_SIZE]; |
| + union perf_event *event; |
| + int err; |
| + |
| + do { |
| + err = perf_session__peek_event(session, offset, buf, |
| + PERF_SAMPLE_MAX_SIZE, &event, |
| + NULL); |
| + if (err) |
| + return err; |
| + |
| + err = cb(session, event, offset, data); |
| + if (err) |
| + return err; |
| + |
| + offset += event->header.size; |
| + if (event->header.type == PERF_RECORD_AUXTRACE) |
| + offset += event->auxtrace.size; |
| + |
| + } while (offset < max_offset); |
| + |
| + return err; |
| +} |
| + |
| static s64 perf_session__process_event(struct perf_session *session, |
| union perf_event *event, u64 file_offset) |
| { |
| diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h |
| index 863dbad87849..1f3f80d8023c 100644 |
| --- a/tools/perf/util/session.h |
| +++ b/tools/perf/util/session.h |
| @@ -64,6 +64,11 @@ int perf_session__peek_event(struct perf_session *session, off_t file_offset, |
| void *buf, size_t buf_sz, |
| union perf_event **event_ptr, |
| struct perf_sample *sample); |
| +typedef int (*peek_events_cb_t)(struct perf_session *session, |
| + union perf_event *event, u64 offset, |
| + void *data); |
| +int perf_session__peek_events(struct perf_session *session, u64 offset, |
| + u64 size, peek_events_cb_t cb, void *data); |
| |
| int perf_session__process_events(struct perf_session *session); |
| |
| -- |
| 2.33.0.rc1.237.g0d66db33f3-goog |
| |