@@ -20,7 +20,8 @@ int perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu,
group_fd, flags);
}
-void event_init_opts(struct event *e, u64 config, int type, char *name)
+static void __event_init_opts(struct event *e, u64 config,
+ int type, char *name, int sampling)
{
memset(e, 0, sizeof(*e));
@@ -32,6 +33,16 @@ void event_init_opts(struct event *e, u64 config, int type, char *name)
/* This has to match the structure layout in the header */
e->attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | \
PERF_FORMAT_TOTAL_TIME_RUNNING;
+ if (sampling) {
+ e->attr.sample_period = 1000;
+ e->attr.sample_type = PERF_SAMPLE_REGS_INTR;
+ e->attr.disabled = 1;
+ }
+}
+
+void event_init_opts(struct event *e, u64 config, int type, char *name)
+{
+ __event_init_opts(e, config, type, name, 0);
}
void event_init_named(struct event *e, u64 config, char *name)
@@ -44,6 +55,11 @@ void event_init(struct event *e, u64 config)
event_init_opts(e, config, PERF_TYPE_RAW, "event");
}
+void event_init_sampling(struct event *e, u64 config)
+{
+ __event_init_opts(e, config, PERF_TYPE_RAW, "event", 1);
+}
+
#define PERF_CURRENT_PID 0
#define PERF_NO_PID -1
#define PERF_NO_CPU -1
@@ -32,6 +32,7 @@ struct event {
void event_init(struct event *e, u64 config);
void event_init_named(struct event *e, u64 config, char *name);
void event_init_opts(struct event *e, u64 config, int type, char *name);
+void event_init_sampling(struct event *e, u64 config);
int event_open_with_options(struct event *e, pid_t pid, int cpu, int group_fd);
int event_open_with_group(struct event *e, int group_fd);
int event_open_with_pid(struct event *e, pid_t pid);