Add encode benchmark

benches/addressdecoder.cpp

@@ -39,7 +39,6 @@
 #include <DRAMSys/simulation/AddressDecoder.h>
 
 #include <benchmark/benchmark.h>
-#include <random>
 
 static DRAMSys::AddressDecoder addressDecoder()
 {
@@ -54,19 +53,32 @@ static void decode(benchmark::State& state)
 {
     auto decoder = addressDecoder();
 
-    std::default_random_engine engine;
-    std::uniform_int_distribution<uint64_t> distribution(0, decoder.maxAddress());
-
     for (auto _ : state)
     {
-        auto randomAddress = distribution(engine);
-        auto decodedAddress = decoder.decodeAddress(randomAddress);
+        // Actual address has no significant impact on performance
+        auto decodedAddress = decoder.decodeAddress(0x0);
         benchmark::DoNotOptimize(decodedAddress);
     }
 }
 
 BENCHMARK(decode);
 
+static void encode(benchmark::State& state)
+{
+    auto decoder = addressDecoder();
+
+    // Actual address has no significant impact on performance
+    DRAMSys::DecodedAddress decodedAddress;
+
+    for (auto _ : state)
+    {
+        auto encodedAddress = decoder.encodeAddress(decodedAddress);
+        benchmark::DoNotOptimize(encodedAddress);
+    }
+}
+
+BENCHMARK(encode);
+
 int sc_main(int argc, char** argv)
 {
     ::benchmark::Initialize(&argc, argv);