add test case focusing on simulation kernel performance

tests/sim_performance/top.h

@@ -0,0 +1,29 @@
+/*
+ * top.h
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#ifndef _SIM_PERFORMANCE_TOP_H_
+#define _SIM_PERFORMANCE_TOP_H_
+
+#include <systemc>
+#include <memory>
+#include <vector>
+#include "pkt_sender.h"
+#include "pkt_switch.h"
+#include "types.h"
+
+class top: public sc_core::sc_module {
+public:
+    top(sc_core::sc_module_name const&, unsigned);
+    virtual ~top() = default;
+private:
+    void run();
+    sc_core::sc_clock clk;
+    std::array<std::vector<std::unique_ptr<pkt_sender>>, SIDES> senders;
+    std::vector<std::unique_ptr<pkt_switch>> switches;
+};
+
+#endif /* TESTS_SIM_PERFORMANCE_TOP_H_ */