优化Linux进程优先级设置

taskbusplatform/core/process_prctl.cpp

@@ -18,14 +18,15 @@
 namespace TASKBUS {
 
 #ifdef WIN32
-	const int pnice_min = 0;
-	const int pnice_max = 5;
+	const int pnice_idle = 0;
+	const int pnice_realtime = 5;
 	const int pnice_norm = 2;
 #endif
 
 #ifdef linux
-	const int pnice_min = PRIO_MIN;
-	const int pnice_max = PRIO_MAX;
+	//in Linux, nice = -20 means realtime
+	const int pnice_idle = PRIO_MAX;
+	const int pnice_realtime = PRIO_MIN;
 	const int pnice_norm = 0;
 
 #endif
@@ -56,7 +57,7 @@ namespace TASKBUS {
 
 #ifdef linux
 		__PID_T_TYPE id = p->processId();
-		if (nice<-PRIO_MIN)	nice = PRIO_MIN;
+		if (nice<PRIO_MIN)	nice = PRIO_MIN;
 		if (nice>PRIO_MAX)	nice = PRIO_MAX;
 		setpriority(PRIO_PROCESS,id,nice);
 #endif
@@ -82,7 +83,7 @@ namespace TASKBUS {
 
 #ifdef linux
 		__PID_T_TYPE id = getpid();
-		if (nice<-PRIO_MIN)	nice = PRIO_MIN;
+		if (nice<PRIO_MIN)	nice = PRIO_MIN;
 		if (nice>PRIO_MAX)	nice = PRIO_MAX;
 		setpriority(PRIO_PROCESS,id,nice);
 #endif

taskbusplatform/core/process_prctl.h

@@ -22,8 +22,11 @@ namespace TASKBUS {
 
 	bool get_memory (qint64 p ,tagMemoryInfo * info);
 
-	extern const int pnice_min;
-	extern const int pnice_max;
+	//Idle Nice
+	extern const int pnice_idle;
+	//Busy Nice
+	extern const int pnice_realtime;
+	//Normal Nice
 	extern const int pnice_norm;
 
 }

taskbusplatform/gui/pdesignerview.cpp

@@ -772,9 +772,19 @@ void PDesignerView::on_actionNiceUp_triggered()
 	if (node>=0 && node < sz)
 	{
 		int nic = project()->get_nice(node);
-		++nic;
-		if (nic>TASKBUS::pnice_max)
-			nic = TASKBUS::pnice_max;
+		if (TASKBUS::pnice_realtime < TASKBUS::pnice_idle)
+		{
+			--nic;
+			if (nic<TASKBUS::pnice_realtime)
+				nic = TASKBUS::pnice_realtime;
+
+		}
+		else
+		{
+			++nic;
+			if (nic>TASKBUS::pnice_realtime)
+				nic = TASKBUS::pnice_realtime;
+		}
 		project()->set_nice(node,nic);
 	}
 	ui->graphicsView_main->scale(0.5,1);
@@ -789,10 +799,22 @@ void PDesignerView::on_actionNiceDown_triggered()
 	if (node>=0 && node < sz)
 	{
 		int nic = project()->get_nice(node);
-		--nic;
-		if (nic<TASKBUS::pnice_min)
-			nic = TASKBUS::pnice_min;
-		project()->set_nice(node,nic);
+		if (TASKBUS::pnice_realtime < TASKBUS::pnice_idle)
+		{
+			++nic;
+			if (nic>TASKBUS::pnice_idle)
+				nic = TASKBUS::pnice_idle;
+			project()->set_nice(node,nic);
+
+		}
+		else
+		{
+			--nic;
+			if (nic<TASKBUS::pnice_idle)
+				nic = TASKBUS::pnice_idle;
+			project()->set_nice(node,nic);
+		}
+
 	}
 	ui->graphicsView_main->scale(0.5,1);
 	ui->graphicsView_main->scale(2,1);