Introduce SimulationTime config

Use SimulationTime to forcefully stop simulation at a specified point in
time.

configs/README.md

@@ -157,6 +157,7 @@ The content of [ddr3.json](simconfig/example.json) is presented below as an exam
 {
     "simconfig": {
         "SimulationName": "example",
+        "SimulationTime": 1e-3,
         "Debug": false,
         "DatabaseRecording": true,
         "PowerAnalysis": false,
@@ -173,6 +174,9 @@ The content of [ddr3.json](simconfig/example.json) is presented below as an exam
 
 - *SimulationName* (string)
     - Give the name of the simulation for distinguishing from other simulations.
+- *SimulationTime* (double)
+    - Time at which the simulation is forcefully stopped. Useful for generating multiple simulations over the exact same timeframe.
+    - Default: unlimited
 - *Debug* (boolean)
     - true: enables debug output on console (only supported by a debug build)
     - false: disables debug output

src/configuration/DRAMSys/config/SimConfig.h

@@ -72,6 +72,7 @@ struct SimConfig
     std::optional<bool> ThermalSimulation;
     std::optional<bool> UseMalloc;
     std::optional<unsigned int> WindowSize;
+    std::optional<double> SimulationTime;
 };
 
 NLOHMANN_JSONIFY_ALL_THINGS(SimConfig,
@@ -86,7 +87,8 @@ NLOHMANN_JSONIFY_ALL_THINGS(SimConfig,
                             StoreMode,
                             ThermalSimulation,
                             UseMalloc,
-                            WindowSize)
+                            WindowSize,
+                            SimulationTime)
 
 } // namespace DRAMSys::Config
 

src/simulator/main.cpp

@@ -57,7 +57,7 @@ int sc_main(int argc, char** argv)
         DRAMSys::Config::from_path(baseConfig.c_str(), resourceDirectory.c_str());
 
     Simulator simulator(std::move(configuration), std::move(resourceDirectory));
-    Simulator::run();
+    simulator.run();
 
     return 0;
 }

src/simulator/simulator/Simulator.cpp

@@ -156,7 +156,15 @@ void Simulator::run()
     auto start = std::chrono::high_resolution_clock::now();
 
     // Start the SystemC simulation
-    sc_core::sc_start();
+    if (configuration.simconfig.SimulationTime.has_value())
+    {
+        sc_core::sc_start(
+            sc_core::sc_time(configuration.simconfig.SimulationTime.value(), sc_core::SC_SEC));
+    }
+    else
+    {
+        sc_core::sc_start();
+    }
 
     if (!sc_core::sc_end_of_simulation_invoked())
     {

src/simulator/simulator/Simulator.h

@@ -49,7 +49,7 @@ public:
     Simulator(DRAMSys::Config::Configuration configuration,
               std::filesystem::path resourceDirectory);
 
-    static void run();
+    void run();
 
 private:
     std::unique_ptr<Initiator> instantiateInitiator(const DRAMSys::Config::Initiator& initiator);

tests/tests_configuration/reference.json

@@ -151,7 +151,8 @@
             "StoreMode": "NoStorage",
             "ThermalSimulation": false,
             "UseMalloc": false,
-            "WindowSize": 1000
+            "WindowSize": 1000,
+            "SimulationTime": 1e-3
         },
         "simulationid": "std::string_simulationId",
         "tracesetup": [

tests/tests_configuration/test_configuration.cpp

@@ -39,7 +39,6 @@
 #include <fstream>
 #include <gtest/gtest.h>
 #include <iostream>
-#include <unordered_map>
 
 using namespace DRAMSys::Config;
 
@@ -115,7 +114,8 @@ protected:
                                          DRAMSys::Config::StoreModeType::NoStorage,
                                          false,
                                          false,
-                                         1000};
+                                         1000,
+                                         1e-3};
 
     DRAMSys::Config::MemSpec memSpec;
 
@@ -328,7 +328,8 @@ TEST_F(ConfigurationTest, SimConfig)
                     "StoreMode": "NoStorage",
                     "ThermalSimulation": false,
                     "UseMalloc": false,
-                    "WindowSize": 1000
+                    "WindowSize": 1000,
+                    "SimulationTime": 1e-3
             }
         }
     )";