perf trace: Separate routine that handles an event from the one that reads it

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>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 60ccfd5..fbdfb33 100644 (file)
--- 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);