diff --git a/CMakeLists.txt b/CMakeLists.txt
index 04e6dd5..b3d3a69 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,7 @@ set(ENABLE_SHARED TRUE CACHE BOOL "Build shared libraries")
 
 set(NO_SUBMODULE_CHECK FALSE CACHE BOOL "Disable the submodule check")
 
+set(ENABLE_CLANG_TIDY FALSE CACHE BOOL "Enable clang-tidy checks")
 include(GitFunctions)
 get_branch_from_git()
 
@@ -60,7 +61,8 @@ if(ENABLE_COVERAGE)
 endif()
 
 find_program(CLANG_TIDY_EXE NAMES "clang-tidy-9")
-if (CLANG_TIDY_EXE)
+if(ENABLE_CLANG_TIDY)
+if(CLANG_TIDY_EXE)
   	message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
   	set(CLANG_TIDY_CHECKS "-*,modernize-*,-modernize-use-trailing-return-type,clang-analyzer-core.*,clang-analyzer-cplusplus.*")
   	set(CMAKE_CXX_CLANG_TIDY 
@@ -71,6 +73,7 @@ else()
   	message(AUTHOR_WARNING "clang-tidy not found!")
   	set(CMAKE_CXX_CLANG_TIDY "" CACHE STRING "" FORCE) # delete it
 endif()
+endif()
 
 setup_conan()
 
diff --git a/cmake/Conan.cmake b/cmake/Conan.cmake
deleted file mode 100644
index 946ccb9..0000000
--- a/cmake/Conan.cmake
+++ /dev/null
@@ -1,45 +0,0 @@
-macro(setup_conan)
-  find_program(conan conan PATHS /usr/bin /usr/local/bin)
-  if(NOT EXISTS ${conan})
-    message(FATAL_ERROR "Conan is required. Please see README.md")
-    return()
-  endif()
-
-  if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL Darwin)
-    set(os Macos)
-  else()
-    set(os ${CMAKE_HOST_SYSTEM_NAME})
-  endif()
-
-  if(${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
-    set(compiler gcc)
-  elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL AppleClang)
-    set(compiler apple-clang)
-  else()
-    message(FATAL_ERROR "Unknown compiler: ${CMAKE_CXX_COMPILER_ID}")
-  endif()
-
-  string(SUBSTRING ${CMAKE_CXX_COMPILER_VERSION} 0 3 compiler_version)
-
-  set(conanfile ${CMAKE_SOURCE_DIR}/conanfile.txt)
-  set(conanfile_cmake ${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
-  set(compiler_libcxx libstdc++11)
-
-  if("${CMAKE_BUILD_TYPE}" STREQUAL "")
-	set(CONAN_BUILD_TYPE Debug)
-  elseif("${CMAKE_BUILD_TYPE}" STREQUAL "RelWithDebInfo")
-	set(CONAN_BUILD_TYPE Release)
-  else()
-	set(CONAN_BUILD_TYPE ${CMAKE_BUILD_TYPE})
-  endif()
-
-  execute_process(COMMAND ${conan} install --build=missing
-	  -s build_type=${CONAN_BUILD_TYPE} -s compiler.libcxx=${compiler_libcxx}
-	           ${CMAKE_SOURCE_DIR} RESULT_VARIABLE return_code)
-  if(NOT ${return_code} EQUAL 0)
-    message(FATAL_ERROR "conan install command failed.")
-  endif()
-
-  include(${conanfile_cmake})
-  conan_basic_setup()
-endmacro()
diff --git a/sc-components b/sc-components
index ffa9b52..3192c9c 160000
--- a/sc-components
+++ b/sc-components
@@ -1 +1 @@
-Subproject commit ffa9b526d7f64f7233720d139e7202aaba61895c
+Subproject commit 3192c9cc2169b18ee7e1cd2c9fbb92d04887e7ac
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 919cf09..dc55372 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,3 @@
 add_subdirectory(io-redirector)
-#add_subdirectory(sim_performance)
+add_subdirectory(sim_performance)
 add_subdirectory(ordered_semaphore)
diff --git a/tests/sim_performance/CMakeLists.txt b/tests/sim_performance/CMakeLists.txt
index 9bfb17d..b907dc9 100644
--- a/tests/sim_performance/CMakeLists.txt
+++ b/tests/sim_performance/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.12)
 add_executable (sim_performance 
     sc_main.cpp
-	blocks.cpp
+	pkt_sender.cpp
+	pkt_switch.cpp
 	top.cpp
 )
 target_link_libraries (sim_performance LINK_PUBLIC scc)
diff --git a/tests/sim_performance/packet.h b/tests/sim_performance/packet.h
new file mode 100644
index 0000000..0d047e2
--- /dev/null
+++ b/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_ */
diff --git a/tests/sim_performance/pkt_sender.cpp b/tests/sim_performance/pkt_sender.cpp
new file mode 100644
index 0000000..a7b060d
--- /dev/null
+++ b/tests/sim_performance/pkt_sender.cpp
@@ -0,0 +1,99 @@
+/*
+ * blocks.cpp
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#include "pkt_sender.h"
+#include "types.h"
+#include <scc/report.h>
+#include <tlm/tlm_mm.h>
+
+using namespace sc_core;
+
+pkt_sender::pkt_sender(const sc_core::sc_module_name &nm, unsigned dim, unsigned pos_x, unsigned pos_y)
+: sc_module(nm)
+, bw_peq("bw_peq")
+, fw_peq("fw_peq")
+, my_pos{pos_x,pos_y}
+, dim{dim}
+{
+    SCCDEBUG(SCMOD)<<"instantiating sender "<<pos_x<<"/"<<pos_y;
+    SC_HAS_PROCESS(pkt_sender);
+    isck.register_nb_transport_bw([this](tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay)->tlm::tlm_sync_enum{
+        return this->nb_bw(gp, phase, delay);
+    });
+    tsck.register_nb_transport_fw([this](tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay)->tlm::tlm_sync_enum{
+        return this->nb_fw(gp, phase, delay);
+    });
+    SC_METHOD(received);
+    sensitive<<fw_peq.get_event();
+    dont_initialize();
+    SC_THREAD(run);
+}
+
+void pkt_sender::gen_routing(std::vector<uint8_t> &route_vec) {
+    if(std::get<0>(my_pos)==0){
+        for(auto i=0; i<dim; ++i)
+            route_vec.push_back(RIGHT);
+    } else if(std::get<0>(my_pos)==dim+1){
+        for(auto i=0; i<dim; ++i)
+            route_vec.push_back(LEFT);
+    } else if(std::get<1>(my_pos)==0){
+        for(auto i=0; i<dim; ++i)
+            route_vec.push_back(BOTTOM);
+    } else if(std::get<1>(my_pos)==dim+1){
+        for(auto i=0; i<dim; ++i)
+            route_vec.push_back(TOP);
+    } else
+        SCCERR(SCMOD)<<"WTF!?!";
+}
+
+void pkt_sender::run() {
+    wait(clk_i.posedge_event());
+    for(auto i=0U; i<1000; i++){
+        tlm::tlm_generic_payload* gp = tlm::tlm_mm<>::get().allocate<packet_ext>();
+        gen_routing(gp->get_extension<packet_ext>()->routing);
+        tlm::tlm_phase phase{tlm::BEGIN_REQ};
+        sc_time delay;
+        gp->acquire();
+        auto sync = isck->nb_transport_fw(*gp, phase, delay);
+        sc_assert(sync==tlm::TLM_UPDATED && phase==tlm::END_REQ);
+        tlm::tlm_generic_payload* ret{nullptr};
+        while(!(ret=bw_peq.get_next_transaction())){
+            wait(bw_peq.get_event());
+        }
+        sc_assert(gp==ret);
+        ret->release();
+        wait(clk_i.posedge_event());
+    }
+    finish_evt.notify(SC_ZERO_TIME);
+}
+
+tlm::tlm_sync_enum pkt_sender::nb_bw(tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay) {
+    sc_assert(phase==tlm::BEGIN_RESP);
+    bw_peq.notify(gp, delay);
+    phase=tlm::END_RESP;
+    return tlm::TLM_COMPLETED;
+}
+
+tlm::tlm_sync_enum pkt_sender::nb_fw(tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay) {
+    sc_assert(phase==tlm::BEGIN_REQ);
+    auto ext = gp.get_extension<packet_ext>();
+    sc_assert(ext->routing.size()==0);
+    gp.acquire();
+    fw_peq.notify(gp, delay);
+    phase=tlm::END_REQ;
+    return tlm::TLM_UPDATED;
+}
+
+void pkt_sender::received() {
+    if(auto gp = fw_peq.get_next_transaction()){
+        tlm::tlm_phase phase{tlm::BEGIN_RESP};
+        sc_time delay;
+        auto sync = tsck->nb_transport_bw(*gp, phase, delay);
+        sc_assert(sync==tlm::TLM_COMPLETED && phase==tlm::END_RESP);
+        gp->release();
+    }
+}
diff --git a/tests/sim_performance/pkt_sender.h b/tests/sim_performance/pkt_sender.h
new file mode 100644
index 0000000..b6728af
--- /dev/null
+++ b/tests/sim_performance/pkt_sender.h
@@ -0,0 +1,37 @@
+/*
+ * blocks.h
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#ifndef _SIM_PERFORMANCE_PKT_SENDER_H_
+#define _SIM_PERFORMANCE_PKT_SENDER_H_
+
+#include <systemc>
+#include "packet.h"
+#include <scc/initiator_mixin.h>
+#include <scc/target_mixin.h>
+
+
+class pkt_sender : sc_core::sc_module {
+public:
+    sc_core::sc_in<bool> clk_i{"clk_i"};
+    scc::initiator_mixin<tlm::tlm_initiator_socket<32>> isck;
+    scc::target_mixin<tlm::tlm_target_socket<32>> tsck;
+    pkt_sender(sc_core::sc_module_name const&, unsigned dim, unsigned pos_x, unsigned pos_y);
+    virtual ~pkt_sender() = default;
+    sc_core::sc_event const& get_finish_event(){return finish_evt;}
+private:
+    void run();
+    void gen_routing(std::vector<uint8_t>& route_vec);
+    void received();
+    tlm_utils::peq_with_get<tlm::tlm_generic_payload> bw_peq, fw_peq;
+    tlm::tlm_sync_enum nb_fw(tlm::tlm_generic_payload&, tlm::tlm_phase&, sc_core::sc_time&);
+    tlm::tlm_sync_enum nb_bw(tlm::tlm_generic_payload&, tlm::tlm_phase&, sc_core::sc_time&);
+    sc_core::sc_event finish_evt;
+    std::pair<unsigned, unsigned> my_pos;
+    const unsigned dim;
+};
+
+#endif /* _SIM_PERFORMANCE_PKT_SENDER_H_ */
diff --git a/tests/sim_performance/pkt_switch.cpp b/tests/sim_performance/pkt_switch.cpp
new file mode 100644
index 0000000..57943f6
--- /dev/null
+++ b/tests/sim_performance/pkt_switch.cpp
@@ -0,0 +1,97 @@
+/*
+ * blocks.cpp
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#ifndef SC_INCLUDE_DYNAMIC_PROCESSES // needed for sc_spawn
+#define SC_INCLUDE_DYNAMIC_PROCESSES
+#endif
+#include "pkt_switch.h"
+#include "types.h"
+#include <tlm/tlm_mm.h>
+#include <scc/report.h>
+
+using namespace sc_core;
+
+pkt_switch::pkt_switch(const sc_core::sc_module_name &nm):sc_module(nm) {
+    SC_HAS_PROCESS(pkt_switch);
+    auto index = 0U;
+    for(auto& s:isck){
+        s.register_nb_transport_bw([this](unsigned id, tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay)->tlm::tlm_sync_enum{
+        return this->nb_bw(id, gp, phase, delay);
+        }, index++);
+    }
+    index = 0U;
+    for(auto& s:tsck){
+        s.register_nb_transport_fw([this](unsigned id, tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay)->tlm::tlm_sync_enum{
+        return this->nb_fw(id, gp, phase, delay);
+        }, index++);
+    }
+    SC_METHOD(clock_cb);
+    sensitive<<clk_i.pos();
+    dont_initialize();
+    for(auto i=0U; i<SIDES; ++i){
+        sc_core::sc_spawn_options opts;
+        opts.spawn_method();
+        opts.set_sensitivity(&out_fifo[i].data_written_event());
+        sc_core::sc_spawn([this, i]()->void {this->output_cb(i);}, sc_core::sc_gen_unique_name("out_peq"), &opts);
+    }
+}
+
+tlm::tlm_sync_enum pkt_switch::nb_fw(unsigned id, tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay) {
+    in_tx[id].write(&gp);
+    if(phase==tlm::BEGIN_REQ) phase=tlm::END_REQ;
+    else SCCERR(SCMOD)<<"WTF!?!";
+    return tlm::TLM_UPDATED;
+}
+
+void pkt_switch::clock_cb() {
+    std::array<std::vector<unsigned>, SIDES> routing{};
+    bool nothing_todo=true;
+    for(auto i=0U; i<SIDES; ++i){
+        if(auto gp = in_tx[i].read()){
+            auto ext = gp->get_extension<packet_ext>();
+            sc_assert(ext);
+            routing[ext->routing.back()].push_back(i);
+            nothing_todo = false;
+        }
+    }
+    if(nothing_todo) return;
+    for(auto i=0U; i<SIDES; ++i){
+        if(routing[i].size()){
+            auto selected_input=routing[i].front();
+            auto* gp = in_tx[selected_input].read();
+            if(out_fifo[i].nb_write(gp)){
+                auto ext = gp->get_extension<packet_ext>();
+                ext->routing.pop_back();
+                gp->acquire();
+                tlm::tlm_phase phase{tlm::BEGIN_RESP};
+                sc_core::sc_time delay;
+                auto res = tsck[selected_input]->nb_transport_bw(*gp, phase, delay);
+                if(res!=tlm::TLM_COMPLETED && !(res==tlm::TLM_UPDATED && phase==tlm::END_RESP))
+                    SCCERR(SCMOD)<<"WTF!?!";
+                in_tx[selected_input].clear();
+            }
+        }
+    }
+}
+
+void pkt_switch::output_cb(unsigned id) {
+
+    if(out_fifo[id].num_available()){
+        auto* gp = out_fifo[id].read();
+        tlm::tlm_phase phase{tlm::BEGIN_REQ};
+        sc_time delay;
+        auto sync = isck[id]->nb_transport_fw(*gp, phase, delay);
+        sc_assert(sync==tlm::TLM_UPDATED && phase==tlm::END_REQ);
+    }
+}
+
+tlm::tlm_sync_enum pkt_switch::nb_bw(unsigned id, tlm::tlm_generic_payload &gp, tlm::tlm_phase &phase, sc_core::sc_time &delay) {
+    gp.release();
+    sc_assert(phase==tlm::BEGIN_RESP);
+    phase=tlm::END_RESP;
+    return tlm::TLM_COMPLETED;
+}
diff --git a/tests/sim_performance/pkt_switch.h b/tests/sim_performance/pkt_switch.h
new file mode 100644
index 0000000..732acc5
--- /dev/null
+++ b/tests/sim_performance/pkt_switch.h
@@ -0,0 +1,37 @@
+/*
+ * blocks.h
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#ifndef _SIM_PERFORMANCE_PKT_SWITCH_H_
+#define _SIM_PERFORMANCE_PKT_SWITCH_H_
+
+#include <systemc>
+#include "packet.h"
+#include <scc/tagged_initiator_mixin.h>
+#include <scc/tagged_target_mixin.h>
+#include <scc/sc_owning_signal.h>
+#include <array>
+
+
+class pkt_switch : sc_core::sc_module {
+public:
+    enum {NONE=std::numeric_limits<unsigned>::max()};
+    sc_core::sc_in<bool> clk_i{"clk_i"};
+    sc_core::sc_vector<scc::tagged_target_mixin<tlm::tlm_target_socket<32>>> tsck{"tsck",4};
+    sc_core::sc_vector<scc::tagged_initiator_mixin<tlm::tlm_initiator_socket<32>>> isck{"isck",4};
+    pkt_switch(sc_core::sc_module_name const&);
+    virtual ~pkt_switch() = default;
+private:
+    void clock_cb();
+    void output_cb(unsigned);
+    tlm::tlm_sync_enum nb_fw(unsigned, tlm::tlm_generic_payload&, tlm::tlm_phase&, sc_core::sc_time&);
+    tlm::tlm_sync_enum nb_bw(unsigned, tlm::tlm_generic_payload&, tlm::tlm_phase&, sc_core::sc_time&);
+    sc_core::sc_vector<scc::sc_owning_signal<tlm::tlm_generic_payload>> in_tx{"in_sig", 4};
+    sc_core::sc_vector<sc_core::sc_fifo<tlm::tlm_generic_payload*>> out_fifo{"out_peq", 4};
+    std::array<unsigned, 4> last_sel_inp{NONE, NONE, NONE, NONE};
+};
+
+#endif /* _SIM_PERFORMANCE_PKT_SWITCH_H_ */
diff --git a/tests/sim_performance/sc_main.cpp b/tests/sim_performance/sc_main.cpp
new file mode 100644
index 0000000..fac05d7
--- /dev/null
+++ b/tests/sim_performance/sc_main.cpp
@@ -0,0 +1,102 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2017 eyck@minres.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License.  You may obtain a copy
+// of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+// License for the specific language governing permissions and limitations under
+// the License.
+////////////////////////////////////////////////////////////////////////////////
+/*
+ * sc_main.cpp
+ *
+ *  Created on: 17.09.2017
+ *      Author: eyck@minres.com
+ */
+
+#include "top.h"
+#include <scc/perf_estimator.h>
+#include <scc/report.h>
+#include <scc/scv_tr_db.h>
+#include <scc/tracer.h>
+#include <boost/program_options.hpp>
+
+using namespace scc;
+namespace po = boost::program_options;
+
+namespace {
+const size_t ERROR_IN_COMMAND_LINE = 1;
+const size_t SUCCESS = 0;
+const size_t ERROR_UNHANDLED_EXCEPTION = 2;
+} // namespace
+
+int sc_main(int argc, char *argv[]) {
+    sc_core::sc_report_handler::set_actions( "/IEEE_Std_1666/deprecated", sc_core::SC_DO_NOTHING );
+    sc_core::sc_report_handler::set_actions(sc_core::SC_ID_MORE_THAN_ONE_SIGNAL_DRIVER_, sc_core::SC_DO_NOTHING);
+    ///////////////////////////////////////////////////////////////////////////
+    // CLI argument parsing
+    ///////////////////////////////////////////////////////////////////////////
+    po::options_description desc("Options");
+    // clang-format off
+    desc.add_options()
+    		("help,h",  "Print help message")
+			("debug,d", "set debug level")
+			("trace,t", "trace SystemC signals");
+    // clang-format on
+    po::variables_map vm;
+    try {
+        po::store(po::parse_command_line(argc, argv, desc), vm); // can throw
+        // --help option
+        if (vm.count("help")) {
+            std::cout << "JIT-ISS simulator for AVR" << std::endl << desc << std::endl;
+            return SUCCESS;
+        }
+        po::notify(vm); // throws on error, so do after help in case
+        // there are any problems
+    } catch (po::error &e) {
+        std::cerr << "ERROR: " << e.what() << std::endl << std::endl;
+        std::cerr << desc << std::endl;
+        return ERROR_IN_COMMAND_LINE;
+    }
+    ///////////////////////////////////////////////////////////////////////////
+    // configure logging
+    ///////////////////////////////////////////////////////////////////////////
+    scc::init_logging(vm.count("debug")?scc::log::DEBUG:scc::log::INFO);
+    ///////////////////////////////////////////////////////////////////////////
+    // set up tracing & transaction recording
+    ///////////////////////////////////////////////////////////////////////////
+    //tracer trace("simple_system", tracer::TEXT, vm.count("trace"));
+    // todo: fix displayed clock period in VCD
+    try {
+        ///////////////////////////////////////////////////////////////////////////
+        // instantiate top level
+        ///////////////////////////////////////////////////////////////////////////
+        perf_estimator estimator;
+        top i_top("i_top", 89);
+        ///////////////////////////////////////////////////////////////////////////
+        // run simulation
+        ///////////////////////////////////////////////////////////////////////////
+        sc_start(sc_core::sc_time(1, sc_core::SC_MS));
+        if(sc_is_running()) {
+            SCCERR() << "simulation timed out"; // calls sc_stop
+            sc_core::sc_stop();
+        }
+    } catch(sc_report& e) {
+        SCCERR() << "Caught sc_report exception during simulation: " << e.what() << ":" << e.get_msg();
+    } catch(std::exception& e) {
+        SCCERR() << "Caught exception during simulation: " << e.what();
+    } catch(...) {
+        SCCERR() << "Caught unspecified exception during simulation";
+    }
+    auto errcnt = sc_report_handler::get_count(SC_ERROR);
+    auto warncnt = sc_report_handler::get_count(SC_WARNING);
+    SCCINFO() << "simulation finished, " << errcnt << " error" << (errcnt == 1 ? "" : "s") << " and " << warncnt << " warning"
+              << (warncnt == 1 ? "" : "s");
+    return errcnt + warncnt;
+}
diff --git a/tests/sim_performance/top.cpp b/tests/sim_performance/top.cpp
new file mode 100644
index 0000000..da8cc68
--- /dev/null
+++ b/tests/sim_performance/top.cpp
@@ -0,0 +1,96 @@
+/*
+ * top.cpp
+ *
+ *  Created on: 04.05.2020
+ *      Author: eyck
+ */
+
+#include "top.h"
+#include <scc/utilities.h>
+#include <scc/report.h>
+#include <fmt/format.h>
+
+using namespace sc_core;
+using namespace fmt;
+
+top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
+    sc_assert(dimension>0);
+    SC_HAS_PROCESS(top);
+    for(auto yidx=0U; yidx<dimension; ++yidx){
+        for(auto xidx=0U; xidx<dimension; ++xidx){
+            auto name = format("sw_{}_{}", xidx, yidx);
+            SCCDEBUG(SCMOD)<<"instantiating switch "<<xidx<<"/"<<yidx;
+            switches.push_back(scc::make_unique<pkt_switch>(sc_module_name(name.c_str())));
+            switches.back()->clk_i(clk);
+        }
+    }
+    for(auto yidx=0U; yidx<dimension; ++yidx){
+        for(auto xidx=0U; xidx<dimension; ++xidx){
+            auto& sw = switches[yidx*dimension+xidx];
+            if(xidx<dimension-1) {
+                auto& swr = switches[yidx*dimension+(xidx+1)];
+                sw->isck[RIGHT](swr->tsck[LEFT]);
+                swr->isck[LEFT](sw->tsck[RIGHT]);
+            }
+            if(yidx<dimension-1){
+                auto& swb = switches[(yidx+1)*dimension+xidx];
+                sw->isck[BOTTOM](swb->tsck[TOP]);
+                swb->isck[TOP](sw->tsck[BOTTOM]);
+            }
+        }
+    }
+    auto yidx = 0U;
+    auto xidx = 0U;
+    for(xidx=0U; xidx<dimension; ++xidx){
+        auto name = format("snd_{}_{}", xidx+1, 0);
+        senders[TOP].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, xidx+1, 0));
+        auto& snd = senders[TOP].back();
+        snd->clk_i(clk);
+        auto& sw = switches[yidx*dimension+xidx];
+        snd->isck(sw->tsck[TOP]);
+        sw->isck[TOP](snd->tsck);
+    }
+    yidx=dimension-1;
+    for(xidx=0U; xidx<dimension; ++xidx){
+        auto name = format("snd_{}_{}", xidx+1, dimension+1);
+        senders[BOTTOM].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, xidx+1, dimension+1));
+        auto& snd = senders[BOTTOM].back();
+        snd->clk_i(clk);
+        auto& sw = switches[yidx*dimension+xidx];
+        snd->isck(sw->tsck[BOTTOM]);
+        sw->isck[BOTTOM](snd->tsck);
+    }
+    xidx=0U;
+    for(yidx=0U; yidx<dimension; ++yidx){
+        auto name = format("snd_{}_{}", 0, yidx+1);
+        senders[LEFT].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, 0, yidx+1));
+        auto& snd = senders[LEFT].back();
+        snd->clk_i(clk);
+        auto& sw = switches[yidx*dimension+xidx];
+        snd->isck(sw->tsck[LEFT]);
+        sw->isck[LEFT](snd->tsck);
+    }
+    xidx=dimension-1;
+    for(yidx=0U; yidx<dimension; ++yidx){
+        auto name = format("snd_{}_{}", dimension+1, yidx+1);
+        senders[RIGHT].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, dimension+1, yidx+1));
+        auto& snd = senders[RIGHT].back();
+        snd->clk_i(clk);
+        auto& sw = switches[yidx*dimension+xidx];
+        snd->isck(sw->tsck[RIGHT]);
+        sw->isck[RIGHT](snd->tsck);
+    }
+    SC_THREAD(run);
+}
+
+void top::run() {
+    sc_event_and_list evt_list;
+    for(auto& sides:senders) {
+        for(auto& sender:sides){
+            evt_list&=sender->get_finish_event();
+        }
+    }
+    wait(evt_list);
+    sc_stop();
+}
+
diff --git a/tests/sim_performance/top.h b/tests/sim_performance/top.h
new file mode 100644
index 0000000..15627f5
--- /dev/null
+++ b/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_ */
diff --git a/tests/sim_performance/types.h b/tests/sim_performance/types.h
new file mode 100644
index 0000000..059b0c6
--- /dev/null
+++ b/tests/sim_performance/types.h
@@ -0,0 +1,13 @@
+/*
+ * types.h
+ *
+ *  Created on: 12.07.2020
+ *      Author: eyck
+ */
+
+#ifndef TESTS_SIM_PERFORMANCE_TYPES_H_
+#define TESTS_SIM_PERFORMANCE_TYPES_H_
+
+enum {TOP=0, RIGHT=1, BOTTOM=2, LEFT=3, SIDES=4};
+
+#endif /* TESTS_SIM_PERFORMANCE_TYPES_H_ */