diff --git a/tests/sim_performance/pkt_sender.cpp b/tests/sim_performance/pkt_sender.cpp
index a7b060d..12415fe 100644
--- a/tests/sim_performance/pkt_sender.cpp
+++ b/tests/sim_performance/pkt_sender.cpp
@@ -12,12 +12,13 @@
 
 using namespace sc_core;
 
-pkt_sender::pkt_sender(const sc_core::sc_module_name &nm, unsigned dim, unsigned pos_x, unsigned pos_y)
+pkt_sender::pkt_sender(const sc_core::sc_module_name &nm, unsigned dim, unsigned pos_x, unsigned pos_y, unsigned count)
 : sc_module(nm)
 , bw_peq("bw_peq")
 , fw_peq("fw_peq")
 , my_pos{pos_x,pos_y}
 , dim{dim}
+, count{count}
 {
     SCCDEBUG(SCMOD)<<"instantiating sender "<<pos_x<<"/"<<pos_y;
     SC_HAS_PROCESS(pkt_sender);
@@ -52,7 +53,7 @@ void pkt_sender::gen_routing(std::vector<uint8_t> &route_vec) {
 
 void pkt_sender::run() {
     wait(clk_i.posedge_event());
-    for(auto i=0U; i<1000; i++){
+    for(auto i=0U; i<count; 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};
@@ -66,7 +67,6 @@ void pkt_sender::run() {
         }
         sc_assert(gp==ret);
         ret->release();
-        wait(clk_i.posedge_event());
     }
     finish_evt.notify(SC_ZERO_TIME);
 }
diff --git a/tests/sim_performance/pkt_sender.h b/tests/sim_performance/pkt_sender.h
index b6728af..e6fcc27 100644
--- a/tests/sim_performance/pkt_sender.h
+++ b/tests/sim_performance/pkt_sender.h
@@ -19,7 +19,7 @@ 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);
+    pkt_sender(sc_core::sc_module_name const&, unsigned dim, unsigned pos_x, unsigned pos_y, unsigned count);
     virtual ~pkt_sender() = default;
     sc_core::sc_event const& get_finish_event(){return finish_evt;}
 private:
@@ -31,7 +31,7 @@ private:
     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;
+    const unsigned dim, count;
 };
 
 #endif /* _SIM_PERFORMANCE_PKT_SENDER_H_ */
diff --git a/tests/sim_performance/sc_main.cpp b/tests/sim_performance/sc_main.cpp
index fac05d7..e5cbe4d 100644
--- a/tests/sim_performance/sc_main.cpp
+++ b/tests/sim_performance/sc_main.cpp
@@ -47,7 +47,9 @@ int sc_main(int argc, char *argv[]) {
     desc.add_options()
     		("help,h",  "Print help message")
 			("debug,d", "set debug level")
-			("trace,t", "trace SystemC signals");
+			("trace,t", "trace SystemC signals")
+			("dim",     po::value<uint8_t>()->default_value(16))
+			("count",   po::value<unsigned>()->default_value(16384));
     // clang-format on
     po::variables_map vm;
     try {
@@ -78,7 +80,10 @@ int sc_main(int argc, char *argv[]) {
         // instantiate top level
         ///////////////////////////////////////////////////////////////////////////
         perf_estimator estimator;
-        top i_top("i_top", 89);
+        auto const count=vm["count"].as<unsigned>();
+        auto const dim = vm["dim"].as<uint8_t>();
+        SCCINFO()<<"Instantiating "<<(unsigned)dim<<"x"<<(unsigned)dim<<" matrix and executing "<<count<<" accesses";
+        top i_top("i_top", dim, count);
         ///////////////////////////////////////////////////////////////////////////
         // run simulation
         ///////////////////////////////////////////////////////////////////////////
diff --git a/tests/sim_performance/top.cpp b/tests/sim_performance/top.cpp
index da8cc68..eda8375 100644
--- a/tests/sim_performance/top.cpp
+++ b/tests/sim_performance/top.cpp
@@ -13,7 +13,7 @@
 using namespace sc_core;
 using namespace fmt;
 
-top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
+top::top(sc_core::sc_module_name const& nm, uint8_t dimension,unsigned count) :sc_module(nm){
     sc_assert(dimension>0);
     SC_HAS_PROCESS(top);
     for(auto yidx=0U; yidx<dimension; ++yidx){
@@ -43,7 +43,7 @@ top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
     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));
+        senders[TOP].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, xidx+1, 0, count));
         auto& snd = senders[TOP].back();
         snd->clk_i(clk);
         auto& sw = switches[yidx*dimension+xidx];
@@ -53,7 +53,7 @@ top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
     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));
+        senders[BOTTOM].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, xidx+1, dimension+1, count));
         auto& snd = senders[BOTTOM].back();
         snd->clk_i(clk);
         auto& sw = switches[yidx*dimension+xidx];
@@ -63,7 +63,7 @@ top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
     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));
+        senders[LEFT].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, 0, yidx+1, count));
         auto& snd = senders[LEFT].back();
         snd->clk_i(clk);
         auto& sw = switches[yidx*dimension+xidx];
@@ -73,7 +73,7 @@ top::top(sc_core::sc_module_name const& nm, unsigned dimension) :sc_module(nm){
     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));
+        senders[RIGHT].push_back(scc::make_unique<pkt_sender>(sc_module_name(name.c_str()), dimension, dimension+1, yidx+1, count));
         auto& snd = senders[RIGHT].back();
         snd->clk_i(clk);
         auto& sw = switches[yidx*dimension+xidx];
diff --git a/tests/sim_performance/top.h b/tests/sim_performance/top.h
index 15627f5..ca97be1 100644
--- a/tests/sim_performance/top.h
+++ b/tests/sim_performance/top.h
@@ -17,7 +17,7 @@
 
 class top: public sc_core::sc_module {
 public:
-    top(sc_core::sc_module_name const&, unsigned);
+    top(sc_core::sc_module_name const&, uint8_t, unsigned);
     virtual ~top() = default;
 private:
     void run();