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perf record: Set timestamp boundary for AUX area events

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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>
This commit is contained in:
Adrian Hunter 2021-05-03 09:42:22 +03:00 committed by Arnaldo Carvalho de Melo
parent e3ff42bdeb
commit 66286ed3e8
1 changed files with 23 additions and 4 deletions
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27
tools/perf/builtin-record.c
View file

@ -969,6 +969,15 @@ static int record__open(struct record *rec)
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,
},
};