From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
If the page_fault_user event is found, then add counting of page faults
for each task and display them.
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
tracecmd/trace-analyze.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/tracecmd/trace-analyze.c b/tracecmd/trace-analyze.c
index 7cf63923b962..2603c360c404 100644
--- a/tracecmd/trace-analyze.c
+++ b/tracecmd/trace-analyze.c
@@ -34,6 +34,7 @@ struct analysis_data {
unsigned long long last_ts;
struct tep_event *switch_event;
struct tep_event *wakeup_event;
+ struct tep_event *page_fault_event;
struct tep_format_field *prev_comm;
struct tep_format_field *prev_state;
struct tep_format_field *next_comm;
@@ -58,6 +59,7 @@ struct task_item {
unsigned long long runtime;
unsigned long long start_ts;
unsigned long long migrated;
+ unsigned long long faulted;
struct sched_timings preempt;
struct sched_timings sleep;
struct sched_timings blocked;
@@ -449,6 +451,19 @@ static void process_wakeup(struct analysis_data *data,
task->woken = true;
}
+static void process_page_fault(struct analysis_data *data,
+ struct tep_handle *tep, int pid,
+ struct tep_record *record)
+{
+ struct cpu_data *cpu_data = &data->cpu_data[record->cpu];
+ struct task_cpu_item *cpu_task;
+ struct task_item *task;
+
+ cpu_task = get_cpu_task(cpu_data, pid);
+ task = cpu_task->task;
+ task->faulted++;
+}
+
static bool match_type(int type, struct tep_event *event)
{
return event && type == event->id;
@@ -475,6 +490,9 @@ static void process_cpu(struct analysis_data *data,
else if (match_type(type, data->wakeup_event))
process_wakeup(data, tep, record);
+
+ else if (match_type(type, data->page_fault_event))
+ process_page_fault(data, tep, pid, record);
}
static int cmp_tasks(const void *A, const void *B)
@@ -664,7 +682,9 @@ static void print_task(struct tep_handle *tep, struct task_item *task)
print_time(task->runtime, '_');
printf("\n");
if (task->migrated)
- printf("Migrated:\t%llu\n", task->migrated);
+ printf("Migrated: %8llu\n", task->migrated);
+ if (task->faulted)
+ printf("Faulted: %8llu\n", task->faulted);
print_timings_title("Type");
print_sched_timings("Wakeup", &task->wakeup);
print_sched_timings("Preempted", &task->preempt);
@@ -821,6 +841,7 @@ static void do_trace_analyze(struct tracecmd_input *handle)
data.wakeup_event = tep_find_event_by_name(tep, "sched", "sched_waking");
if (!data.wakeup_event)
data.wakeup_event = tep_find_event_by_name(tep, "sched", "sched_wakeup");
+ data.page_fault_event = tep_find_event_by_name(tep, "exceptions", "page_fault_user");
/* Set to a very large number */
data.start_ts = -1ULL;
--
2.35.1
