improved planner

src/files/Supervisor.h

@@ -131,7 +131,7 @@ public:
             }
         }
 
-        const int maxThreads = std::thread::hardware_concurrency();
+        const int maxThreads = 4 * std::thread::hardware_concurrency();
         printf("total tasks count = %ld, active task count %ld, maxKernels %d, maxNeededKernels %d, maxThreads %d\n", 
                 this->getLength(), activeTasks, maxKernels, maxNeededKernels, maxThreads);