perf record: Set timestamp boundary for AUX area events

AUX area data is not processed by 'perf record' and consequently the
 --timestamp-boundary option may result in no values for "time of first
sample" and "time of last sample". However there are non-sample events
that can be used instead, namely 'itrace_start' and 'aux'.
'itrace_start' is issued before tracing starts, and 'aux' is issued
every time data is ready.

Implement tool callbacks for those two for 'perf record', to update the
timestamp boundary.

Example:

 $ perf record -e intel_pt//u --timestamp-boundary uname
 Linux
 [ perf record: Woken up 1 times to write data ]
 [ perf record: Captured and wrote 0.022 MB perf.data ]
 $ perf script --header-only | grep "time of"
 # time of first sample : 4574.835541
 # time of last sample : 4574.835907
 $ perf script --itrace=be -F-ip | head -1
           uname 13752 [001]  4574.835589:          1 branches:uH:
 $ perf script --itrace=be -F-ip | tail -1
           uname 13752 [001]  4574.835867:          1 branches:uH:
 $

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20210503064222.5319-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3337b5f..bc3dd37 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -969,6 +969,15 @@ out:
        return rc;
 }
 
+static void set_timestamp_boundary(struct record *rec, u64 sample_time)
+{
+       if (rec->evlist->first_sample_time == 0)
+               rec->evlist->first_sample_time = sample_time;
+
+       if (sample_time)
+               rec->evlist->last_sample_time = sample_time;
+}
+
 static int process_sample_event(struct perf_tool *tool,
                                union perf_event *event,
                                struct perf_sample *sample,
@@ -977,10 +986,7 @@ static int process_sample_event(struct perf_tool *tool,
 {
        struct record *rec = container_of(tool, struct record, tool);
 
-       if (rec->evlist->first_sample_time == 0)
-               rec->evlist->first_sample_time = sample->time;
-
-       rec->evlist->last_sample_time = sample->time;
+       set_timestamp_boundary(rec, sample->time);
 
        if (rec->buildid_all)
                return 0;
@@ -2402,6 +2408,17 @@ static int build_id__process_mmap2(struct perf_tool *tool, union perf_event *eve
        return perf_event__process_mmap2(tool, event, sample, machine);
 }
 
+static int process_timestamp_boundary(struct perf_tool *tool,
+                                     union perf_event *event __maybe_unused,
+                                     struct perf_sample *sample,
+                                     struct machine *machine __maybe_unused)
+{
+       struct record *rec = container_of(tool, struct record, tool);
+
+       set_timestamp_boundary(rec, sample->time);
+       return 0;
+}
+
 /*
  * XXX Ideally would be local to cmd_record() and passed to a record__new
  * because we need to have access to it in record__exit, that is called
@@ -2436,6 +2453,8 @@ static struct record record = {
                .namespaces     = perf_event__process_namespaces,
                .mmap           = build_id__process_mmap,
                .mmap2          = build_id__process_mmap2,
+               .itrace_start   = process_timestamp_boundary,
+               .aux            = process_timestamp_boundary,
                .ordered_events = true,
        },
 };