static std::unique_ptr<EventFd> OpenHardwareEventOnCpu0() {
std::unique_ptr<EventTypeAndModifier> event_type_modifier = ParseEventType("cpu-cycles");
if (event_type_modifier == nullptr) {
return nullptr;
}
perf_event_attr attr = CreateDefaultPerfEventAttr(event_type_modifier->event_type);
return EventFd::OpenEventFile(attr, getpid(), 0);
}
static void PrintEventTypesOfType(uint32_t type, const std::string& type_name,
const std::vector<EventType>& event_types) {
printf("List of %s:\n", type_name.c_str());
for (auto& event_type : event_types) {
if (event_type.type == type &&
IsEventAttrSupportedByKernel(CreateDefaultPerfEventAttr(event_type))) {
printf(" %s\n", event_type.name.c_str());
}
}
printf("\n");
}
static void PrintEventTypesOfType(uint32_t type, const std::string& type_name,
const std::vector<EventType>& event_types) {
printf("List of %s:\n", type_name.c_str());
for (auto& event_type : event_types) {
if (event_type.type == type) {
perf_event_attr attr = CreateDefaultPerfEventAttr(event_type);
// Exclude kernel to list supported events even when
// /proc/sys/kernel/perf_event_paranoid is 2.
attr.exclude_kernel = 1;
if (IsEventAttrSupportedByKernel(attr)) {
printf(" %s\n", event_type.name.c_str());
}
}
}
printf("\n");
}
