[tip:perf/core] perf session: Add ability to 'skip' a non-piped event stream

From: tip-bot for Adrian Hunter
Date: Mon Jul 28 2014 - 04:25:43 EST

Commit-ID: 6f917c70998d22bda6d06cb168665068c6066cd4
Gitweb: http://git.kernel.org/tip/6f917c70998d22bda6d06cb168665068c6066cd4
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
AuthorDate: Wed, 23 Jul 2014 22:19:57 +0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 23 Jul 2014 17:00:46 -0300

perf session: Add ability to 'skip' a non-piped event stream

A piped event stream may contain arbitary sized tracepoint information
following a PERF_RECORD_HEADER_TRACING_DATA event. The position in the
stream has to be 'skipped' to match the start of the next event.

Provide the same ability to a non-piped event stream to allow for
Instruction Trace data that may also be in a non-piped event stream.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1406143198-20732-1-git-send-email-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/perf/util/session.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index eac14ce..f4399b2 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1284,6 +1284,7 @@ int __perf_session__process_events(struct perf_session *session,
union perf_event *event;
uint32_t size;
struct ui_progress prog;
+ int skip;


@@ -1344,7 +1345,8 @@ more:
size = event->header.size;

if (size < sizeof(struct perf_event_header) ||
- perf_session__process_event(session, event, tool, file_pos) < 0) {
+ (skip = perf_session__process_event(session, event, tool, file_pos))
+ < 0) {
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
file_offset + head, event->header.size,
@@ -1352,6 +1354,9 @@ more:
goto out_err;

+ if (skip)
+ size += skip;
head += size;
file_pos += size;

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/