[PATCH 07/21] perf trace: Separate routine that handles an event from the one that reads it

Arnaldo Carvalho de Melo
2015-02-25T21:47:44Z

Because we need to use ordered_events in some cases, so we will need to
first have them in a queue, order that queue, and then process the
event.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-cmkw9zgoh0z4r218957ftp1a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-trace.c | 58 +++++++++++++++++++++++++---------------------
1 file changed, 31 insertions(+), 27 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 60ccfd52189d..fbdfb338bc38 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2092,10 +2092,39 @@ static int perf_evlist__add_pgfault(struct perf_evlist *evlist,
return 0;
}

+static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
+{
+ const u32 type = event->header.type;
+ struct perf_evsel *evsel;
+
+ if (!trace->full_time && trace->base_time == 0)
+ trace->base_time = sample->time;
+
+ if (type != PERF_RECORD_SAMPLE) {
+ trace__process_event(trace, trace->host, event, sample);
+ return;
+ }
+
+ evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
+ if (evsel == NULL) {
+ fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
+ return;
+ }
+
+ if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
+ sample->raw_data == NULL) {
+ fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
+ perf_evsel__name(evsel), sample->tid,
+ sample->cpu, sample->raw_size);
+ } else {
+ tracepoint_handler handler = evsel->handler;
+ handler(trace, evsel, event, sample);
+ }
+}
+
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = trace->evlist;
- struct perf_evsel *evsel;
int err = -1, i;
unsigned long before;
const bool forks = argc > 0;
@@ -2190,8 +2219,6 @@ again:
union perf_event *event;

while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
- const u32 type = event->header.type;
- tracepoint_handler handler;
struct perf_sample sample;

++trace->nr_events;
@@ -2202,30 +2229,7 @@ again:
goto next_event;
}

- if (!trace->full_time && trace->base_time == 0)
- trace->base_time = sample.time;
-
- if (type != PERF_RECORD_SAMPLE) {
- trace__process_event(trace, trace->host, event, &sample);
- continue;
- }
-
- evsel = perf_evlist__id2evsel(evlist, sample.id);
- if (evsel == NULL) {
- fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
- goto next_event;
- }
-
- if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
- sample.raw_data == NULL) {
- fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
- perf_evsel__name(evsel), sample.tid,
- sample.cpu, sample.raw_size);
- goto next_event;
- }
-
- handler = evsel->handler;
- handler(trace, evsel, event, &sample);
+ trace__handle_event(trace, event, &sample);
next_event:
perf_evlist__mmap_consume(evlist, i);

--
1.9.3