add test case focusing on simulation kernel performance

tests/sim_performance/packet.h

@@ -0,0 +1,34 @@
+/*
+ * packet.h
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#ifndef _SIM_PERFORMANCE_PACKET_H_
+#define _SIM_PERFORMANCE_PACKET_H_
+
+#include <tlm>
+
+struct packet {
+    std::vector<uint8_t> routing;
+};
+
+struct packet_ext: public tlm::tlm_extension<packet_ext>, public packet {
+
+    packet_ext() = default;
+
+    packet_ext& operator=(packet_ext const& o) = default;
+
+    tlm_extension_base* clone() const override {
+        return new packet_ext(*this);
+    }
+
+    void copy_from(tlm_extension_base const & o) override {
+        auto* ext = dynamic_cast<packet_ext const*>(&o);
+        if(ext)
+            this->routing=ext->routing;
+    }
+};
+
+#endif /* _SIM_PERFORMANCE_PACKET_H_ */