diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt
index 673ef97877fc30694b51ec189f55d58cc161ab38..a00a34276c54621c9ef71a72b35e6ffc3579b42d 100644
--- a/tools/perf/Documentation/perf-inject.txt
+++ b/tools/perf/Documentation/perf-inject.txt
@@ -35,6 +35,11 @@ OPTIONS
-o::
--output=::
Output file name. (default: stdout)
+-s::
+--sched-stat::
+ Merge sched_stat and sched_switch for getting events where and how long
+ tasks slept. sched_switch contains a callchain where a task slept and
+ sched_stat contains a timeslice how long a task slept.
SEE ALSO
--------
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index a706ed57f94ee438102414ed1f1dacfe7e09faf7..a4a307258fa3a5bd05a81a8ac48c362b958faa65 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -8,19 +8,32 @@
#include "builtin.h"
#include "perf.h"
+#include "util/color.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/debug.h"
#include "util/parse-options.h"
+#include <linux/list.h>
+
struct perf_inject {
struct perf_tool tool;
bool build_ids;
+ bool sched_stat;
const char *input_name;
int pipe_output,
output;
u64 bytes_written;
+ struct list_head samples;
+};
+
+struct event_entry {
+ struct list_head node;
+ u32 tid;
+ union perf_event event[0];
};
static int perf_event__repipe_synth(struct perf_tool *tool,
@@ -86,12 +99,23 @@ static int perf_event__repipe(struct perf_tool *tool,
return perf_event__repipe_synth(tool, event, machine);
}
+typedef int (*inject_handler)(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine);
+
static int perf_event__repipe_sample(struct perf_tool *tool,
union perf_event *event,
- struct perf_sample *sample __maybe_unused,
- struct perf_evsel *evsel __maybe_unused,
- struct machine *machine)
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
{
+ if (evsel->handler.func) {
+ inject_handler f = evsel->handler.func;
+ return f(tool, event, sample, evsel, machine);
+ }
+
return perf_event__repipe_synth(tool, event, machine);
}
@@ -216,6 +240,79 @@ static int perf_event__inject_buildid(struct perf_tool *tool,
return 0;
}
+static int perf_inject__sched_process_exit(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ struct event_entry *ent;
+
+ list_for_each_entry(ent, &inject->samples, node) {
+ if (sample->tid == ent->tid) {
+ list_del_init(&ent->node);
+ free(ent);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int perf_inject__sched_switch(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ struct event_entry *ent;
+
+ perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
+
+ ent = malloc(event->header.size + sizeof(struct event_entry));
+ if (ent == NULL) {
+ color_fprintf(stderr, PERF_COLOR_RED,
+ "Not enough memory to process sched switch event!");
+ return -1;
+ }
+
+ ent->tid = sample->tid;
+ memcpy(&ent->event, event, event->header.size);
+ list_add(&ent->node, &inject->samples);
+ return 0;
+}
+
+static int perf_inject__sched_stat(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ struct event_entry *ent;
+ union perf_event *event_sw;
+ struct perf_sample sample_sw;
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ u32 pid = perf_evsel__intval(evsel, sample, "pid");
+
+ list_for_each_entry(ent, &inject->samples, node) {
+ if (pid == ent->tid)
+ goto found;
+ }
+
+ return 0;
+found:
+ event_sw = &ent->event[0];
+ perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
+
+ sample_sw.period = sample->period;
+ sample_sw.time = sample->time;
+ perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
+ &sample_sw, false);
+ return perf_event__repipe(tool, event_sw, &sample_sw, machine);
+}
+
extern volatile int session_done;
static void sig_handler(int sig __maybe_unused)
@@ -223,6 +320,21 @@ static void sig_handler(int sig __maybe_unused)
session_done = 1;
}
+static int perf_evsel__check_stype(struct perf_evsel *evsel,
+ u64 sample_type, const char *sample_msg)
+{
+ struct perf_event_attr *attr = &evsel->attr;
+ const char *name = perf_evsel__name(evsel);
+
+ if (!(attr->sample_type & sample_type)) {
+ pr_err("Samples for %s event do not have %s attribute set.",
+ name, sample_msg);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int __cmd_inject(struct perf_inject *inject)
{
struct perf_session *session;
@@ -241,6 +353,26 @@ static int __cmd_inject(struct perf_inject *inject)
if (session == NULL)
return -ENOMEM;
+ if (inject->sched_stat) {
+ struct perf_evsel *evsel;
+
+ inject->tool.ordered_samples = true;
+
+ list_for_each_entry(evsel, &session->evlist->entries, node) {
+ const char *name = perf_evsel__name(evsel);
+
+ if (!strcmp(name, "sched:sched_switch")) {
+ if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
+ return -EINVAL;
+
+ evsel->handler.func = perf_inject__sched_switch;
+ } else if (!strcmp(name, "sched:sched_process_exit"))
+ evsel->handler.func = perf_inject__sched_process_exit;
+ else if (!strncmp(name, "sched:sched_stat_", 17))
+ evsel->handler.func = perf_inject__sched_stat;
+ }
+ }
+
if (!inject->pipe_output)
lseek(inject->output, session->header.data_offset, SEEK_SET);
@@ -275,6 +407,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
.build_id = perf_event__repipe_op2_synth,
},
.input_name = "-",
+ .samples = LIST_HEAD_INIT(inject.samples),
};
const char *output_name = "-";
const struct option options[] = {
@@ -284,6 +417,9 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
"input file name"),
OPT_STRING('o', "output", &output_name, "file",
"output file name"),
+ OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
+ "Merge sched-stat and sched-switch for getting events "
+ "where and how long tasks slept"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show build ids, etc)"),
OPT_END()