QVariant SensorBrowserModel::data( const QModelIndex & index, int role) const { //virtual
if(!index.isValid()) return QVariant();
switch(role) {
case Qt::DisplayRole: {
if(index.column()==0) {
uint id = index.internalId();
if(mSensorInfoMap.contains(id)) {
Q_ASSERT(mSensorInfoMap.value(id));
SensorInfo *sensorInfo = mSensorInfoMap.value(id);
return QString(sensorInfo->description() + " (" + KSGRD::SensorMgr->translateSensorType(sensorInfo->type()) + ')' );
}
if(mTreeNodeNames.contains(id)) return mTreeNodeNames.value(id);
if(mHostInfoMap.contains(id)) {
Q_ASSERT(mHostInfoMap.value(id));
return mHostInfoMap.value(id)->hostName();
}
}
return QString();
}
case Qt::DecorationRole: {
if(index.column() == 0) {
HostInfo *host = getHostInfo(index.internalId());
KSGRD::SensorAgent *agent;
if(host != NULL && (agent = host->sensorAgent())) {
if(agent->daemonOnLine())
return KIcon("computer");
else
return KIcon("dialog-warning");
} else
return QIcon();
} else
return QIcon();
break;
}
case Qt::ToolTipRole: {
if(index.column() == 0) {
HostInfo *host = getHostInfo(index.internalId());
KSGRD::SensorAgent *agent;
if(host != NULL && (agent = host->sensorAgent())) {
if(agent->daemonOnLine())
return agent->hostName();
else
return agent->reasonForOffline();
}
}
break;
}
} //switch
return QVariant();
}
void LowMemoryDetector::process_sensor_changes(TRAPS) {
ResourceMark rm(THREAD);
HandleMark hm(THREAD);
// No need to hold Service_lock to call out to Java
int num_memory_pools = MemoryService::num_memory_pools();
for (int i = 0; i < num_memory_pools; i++) {
MemoryPool* pool = MemoryService::get_memory_pool(i);
SensorInfo* sensor = pool->usage_sensor();
SensorInfo* gc_sensor = pool->gc_usage_sensor();
if (sensor != NULL && sensor->has_pending_requests()) {
sensor->process_pending_requests(CHECK);
}
if (gc_sensor != NULL && gc_sensor->has_pending_requests()) {
gc_sensor->process_pending_requests(CHECK);
}
}
}
bool LowMemoryDetector::has_pending_requests() {
assert(Service_lock->owned_by_self(), "Must own Service_lock");
bool has_requests = false;
int num_memory_pools = MemoryService::num_memory_pools();
for (int i = 0; i < num_memory_pools; i++) {
MemoryPool* pool = MemoryService::get_memory_pool(i);
SensorInfo* sensor = pool->usage_sensor();
if (sensor != NULL) {
has_requests = has_requests || sensor->has_pending_requests();
}
SensorInfo* gc_sensor = pool->gc_usage_sensor();
if (gc_sensor != NULL) {
has_requests = has_requests || gc_sensor->has_pending_requests();
}
}
return has_requests;
}
void LowMemoryDetector::low_memory_detector_thread_entry(JavaThread* jt, TRAPS) {
while (true) {
bool sensors_changed = false;
{
// _no_safepoint_check_flag is used here as LowMemory_lock is a
// special lock and the VMThread may acquire this lock at safepoint.
// Need state transition ThreadBlockInVM so that this thread
// will be handled by safepoint correctly when this thread is
// notified at a safepoint.
// This ThreadBlockInVM object is not also considered to be
// suspend-equivalent because LowMemoryDetector threads are
// not visible to external suspension.
ThreadBlockInVM tbivm(jt);
MutexLockerEx ml(LowMemory_lock, Mutex::_no_safepoint_check_flag);
while (!(sensors_changed = has_pending_requests())) {
// wait until one of the sensors has pending requests
LowMemory_lock->wait(Mutex::_no_safepoint_check_flag);
}
}
{
ResourceMark rm(THREAD);
HandleMark hm(THREAD);
// No need to hold LowMemory_lock to call out to Java
int num_memory_pools = MemoryService::num_memory_pools();
for (int i = 0; i < num_memory_pools; i++) {
MemoryPool* pool = MemoryService::get_memory_pool(i);
SensorInfo* sensor = pool->usage_sensor();
SensorInfo* gc_sensor = pool->gc_usage_sensor();
if (sensor != NULL && sensor->has_pending_requests()) {
sensor->process_pending_requests(CHECK);
}
if (gc_sensor != NULL && gc_sensor->has_pending_requests()) {
gc_sensor->process_pending_requests(CHECK);
}
}
}
}
}
// Only called by VMThread at GC time
void LowMemoryDetector::detect_after_gc_memory(MemoryPool* pool) {
SensorInfo* sensor = pool->gc_usage_sensor();
if (sensor == NULL ||
!pool->gc_usage_threshold()->is_high_threshold_supported() ||
pool->gc_usage_threshold()->high_threshold() == 0) {
return;
}
{
MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
MemoryUsage usage = pool->get_last_collection_usage();
sensor->set_counter_sensor_level(usage, pool->gc_usage_threshold());
if (sensor->has_pending_requests()) {
// notify sensor state update
Service_lock->notify_all();
}
}
}
// This method could be called from any Java threads
// and also VMThread.
void LowMemoryDetector::detect_low_memory() {
MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
bool has_pending_requests = false;
int num_memory_pools = MemoryService::num_memory_pools();
for (int i = 0; i < num_memory_pools; i++) {
MemoryPool* pool = MemoryService::get_memory_pool(i);
SensorInfo* sensor = pool->usage_sensor();
if (sensor != NULL &&
pool->usage_threshold()->is_high_threshold_supported() &&
pool->usage_threshold()->high_threshold() != 0) {
MemoryUsage usage = pool->get_memory_usage();
sensor->set_gauge_sensor_level(usage,
pool->usage_threshold());
has_pending_requests = has_pending_requests || sensor->has_pending_requests();
}
}
if (has_pending_requests) {
Service_lock->notify_all();
}
}
void SensorBrowserModel::removeAllSensorUnderBranch(HostInfo* hostInfo, int parentId) {
QList<int> children = mTreeMap.value(parentId);
for (int i = 0; i < children.size(); i++) {
if (mTreeMap.contains(children[i])) {
//well our children is not a sensor so remove what is under him
removeAllSensorUnderBranch(hostInfo,children[i]);
} else {
//well this should be a sensor so remove it
if (mSensorInfoMap.contains(children[i])) {
SensorInfo* sensorToRemove = mSensorInfoMap.value(children[i]);
Q_ASSERT(sensorToRemove);
removeSensor(hostInfo, parentId, sensorToRemove->name());
}
}
}
}
QMimeData * SensorBrowserModel::mimeData ( const QModelIndexList & indexes ) const { //virtual
QMimeData *mimeData = new QMimeData();
if(indexes.size() != 1) return mimeData;
SensorInfo *sensor = getSensorInfo(indexes[0]);
if(!sensor) return mimeData;
// Create text drag object as
// "<hostname> <sensorname> <sensortype> <sensordescription>".
// Only the description may contain blanks.
Q_ASSERT(sensor);
Q_ASSERT(sensor->hostInfo());
QString mDragText = sensor->hostInfo()->hostName() + ' ' +
sensor->name() + ' ' +
sensor->type()+ ' ' +
sensor->description();
mimeData->setData( "application/x-ksysguard", mDragText.toUtf8() );
return mimeData;
}
static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
assert(*sensor_ptr == NULL, "Should be called only once");
SensorInfo* sensor = new SensorInfo();
sensor->set_sensor(sh());
*sensor_ptr = sensor;
}