From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 17/26] perf session: Add facility to peek at all events Date: Fri, 22 Nov 2019 11:57:02 -0300 Message-ID: <20191122145711.3171-18-acme@kernel.org> References: <20191122145711.3171-1-acme@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20191122145711.3171-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Adrian Hunter , Jiri Olsa , Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Adrian Hunter 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 Cc: Jiri Olsa Link: http://lore.kernel.org/lkml/20191115124225.5247-11-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- 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 ab4dae1efea3..d0d7d25b23e3 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1659,6 +1659,34 @@ int perf_session__peek_event(struct perf_session *session, off_t file_offset, 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 8456e1d868fd..f76480166d38 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); -- 2.21.0