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Date: Wed, 11 Dec 2013 14:36:49 +0200
From: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung@...il.com>,
Paul Mackerras <paulus@...ba.org>,
Stephane Eranian <eranian@...gle.com>,
Andi Kleen <ak@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH v0 37/71] perf tools: Add support for PERF_RECORD_ITRACE_LOST
From: Adrian Hunter <adrian.hunter@...el.com>
Instruction Tracing may lose data, for example when buffers
are full. In that case, an event of type PERF_RECORD_ITRACE_LOST
is created to inform of the loss. Add support for that event type.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
tools/perf/builtin-inject.c | 1 +
tools/perf/util/event.c | 17 +++++++++++++++++
tools/perf/util/event.h | 11 +++++++++++
tools/perf/util/machine.c | 10 ++++++++++
tools/perf/util/machine.h | 2 ++
tools/perf/util/session.c | 5 +++++
tools/perf/util/tool.h | 1 +
7 files changed, 47 insertions(+)
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 8400d29..78911a3 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -417,6 +417,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
.fork = perf_event__repipe,
.exit = perf_event__repipe,
.lost = perf_event__repipe,
+ .itrace_lost = perf_event__repipe,
.read = perf_event__repipe_sample,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 30f91d7..4d001d9 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -20,6 +20,7 @@ static const char *perf_event__names[] = {
[PERF_RECORD_FORK] = "FORK",
[PERF_RECORD_READ] = "READ",
[PERF_RECORD_SAMPLE] = "SAMPLE",
+ [PERF_RECORD_ITRACE_LOST] = "ITRACE_LOST",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
@@ -536,6 +537,14 @@ int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
return machine__process_lost_event(machine, event, sample);
}
+int perf_event__process_itrace_lost(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine)
+{
+ return machine__process_itrace_lost_event(machine, event);
+}
+
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
@@ -596,6 +605,11 @@ int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
return machine__process_exit_event(machine, event, sample);
}
+size_t perf_event__fprintf_itrace_lost(union perf_event *event, FILE *fp)
+{
+ return fprintf(fp, " offset: %#"PRIx64"\n", event->itrace_lost.offset);
+}
+
size_t perf_event__fprintf(union perf_event *event, FILE *fp)
{
size_t ret = fprintf(fp, "PERF_RECORD_%s",
@@ -615,6 +629,9 @@ size_t perf_event__fprintf(union perf_event *event, FILE *fp)
case PERF_RECORD_MMAP2:
ret += perf_event__fprintf_mmap2(event, fp);
break;
+ case PERF_RECORD_ITRACE_LOST:
+ ret += perf_event__fprintf_itrace_lost(event, fp);
+ break;
default:
ret += fprintf(fp, "\n");
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 88e27cb..b684398 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -193,6 +193,11 @@ struct id_index_event {
struct id_index_entry entries[0];
};
+struct itrace_lost_event {
+ struct perf_event_header header;
+ u64 offset;
+};
+
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -208,6 +213,7 @@ union perf_event {
struct tracing_data_event tracing_data;
struct build_id_event build_id;
struct id_index_event id_index;
+ struct itrace_lost_event itrace_lost;
};
void perf_event__print_totals(void);
@@ -244,6 +250,10 @@ int perf_event__process_lost(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
+int perf_event__process_itrace_lost(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine);
int perf_event__process_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@@ -285,6 +295,7 @@ size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_itrace_lost(union perf_event *event, FILE *fp);
size_t perf_event__fprintf(union perf_event *event, FILE *fp);
#endif /* __PERF_RECORD_H */
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index a04210d..a224cf7 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -361,6 +361,14 @@ int machine__process_lost_event(struct machine *machine __maybe_unused,
return 0;
}
+int machine__process_itrace_lost_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_itrace_lost(event, stdout);
+ return 0;
+}
+
struct map *machine__new_module(struct machine *machine, u64 start,
const char *filename)
{
@@ -1149,6 +1157,8 @@ int machine__process_event(struct machine *machine, union perf_event *event,
ret = machine__process_exit_event(machine, event, sample); break;
case PERF_RECORD_LOST:
ret = machine__process_lost_event(machine, event, sample); break;
+ case PERF_RECORD_ITRACE_LOST:
+ ret = machine__process_itrace_lost_event(machine, event); break;
default:
ret = -1;
break;
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index aaad99a..fee1f89 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -50,6 +50,8 @@ int machine__process_fork_event(struct machine *machine, union perf_event *event
struct perf_sample *sample);
int machine__process_lost_event(struct machine *machine, union perf_event *event,
struct perf_sample *sample);
+int machine__process_itrace_lost_event(struct machine *machine,
+ union perf_event *event);
int machine__process_mmap_event(struct machine *machine, union perf_event *event,
struct perf_sample *sample);
int machine__process_mmap2_event(struct machine *machine, union perf_event *event,
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 7847096..de09c2e 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -236,6 +236,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
tool->exit = process_event_stub;
if (tool->lost == NULL)
tool->lost = perf_event__process_lost;
+ if (tool->itrace_lost == NULL)
+ tool->itrace_lost = perf_event__process_itrace_lost;
if (tool->read == NULL)
tool->read = process_event_sample_stub;
if (tool->throttle == NULL)
@@ -454,6 +456,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
[PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
[PERF_RECORD_SAMPLE] = perf_event__all64_swap,
+ [PERF_RECORD_ITRACE_LOST] = perf_event__all64_swap,
[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
@@ -998,6 +1001,8 @@ static int perf_session_deliver_event(struct perf_session *session,
return tool->throttle(tool, event, sample, machine);
case PERF_RECORD_UNTHROTTLE:
return tool->unthrottle(tool, event, sample, machine);
+ case PERF_RECORD_ITRACE_LOST:
+ return tool->itrace_lost(tool, event, sample, machine);
default:
++session->stats.nr_unknown_events;
return -1;
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index f07d6fe..18afd13 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -34,6 +34,7 @@ struct perf_tool {
fork,
exit,
lost,
+ itrace_lost,
throttle,
unthrottle;
event_attr_op attr;
--
1.8.5.1
--
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