Benchmark code for the NuInterpreter.

benchmark/bench1.cpp

@@ -3,6 +3,8 @@
 #include "cpu/ppc/ppcemu.h"
 #include "cpu/ppc/ppcmmu.h"
 #include "devices/mpc106.h"
+#include "jittables.h"
+#include "nuinterpreter.h"
 #include <thirdparty/loguru/loguru.hpp>
 
 uint32_t cs_code[] = {
@@ -17,6 +19,14 @@ uint32_t cs_code[] = {
     0x7C650194, 0x4E800020
 };
 
+/* set up vCPU registers for benchmark code execution */
+void setup_regs() {
+    ppc_state.pc = 0;
+    ppc_state.gpr[3] = 0x1000; // buf
+    ppc_state.gpr[4] = 0x8000; // len
+    ppc_state.gpr[5] = 0;      // sum
+}
+
 
 int main(int argc, char** argv) {
     int i;
@@ -38,6 +48,8 @@ int main(int argc, char** argv) {
         return -1;
     }
 
+    init_jit_tables();
+
     ppc_cpu_init(grackle_obj, PPC_VER::MPC750);
 
     /* load executable code into RAM at address 0 */
@@ -51,16 +63,22 @@ int main(int argc, char** argv) {
         mem_write_byte(0x1000+i, rand() % 256);
     }
 
-    /* prepare benchmark code execution */
-    ppc_state.pc = 0;
-    ppc_state.gpr[3] = 0x1000; // buf
-    ppc_state.gpr[4] = 0x8000; // len
-    ppc_state.gpr[5] = 0;      // sum
+    setup_regs();
 
     ppc_exec_until(0xC4);
 
     LOG_F(INFO, "Checksum: 0x%08X", ppc_state.gpr[3]);
 
+    LOG_F(INFO, "\nRunning with the NuInterpreter");
+
+    setup_regs();
+
+    NuInterpExec(0);
+
+    LOG_F(INFO, "Checksum: 0x%08X", ppc_state.gpr[3]);
+
+    LOG_F(INFO, "\nBenchmarking the old Interpreter:");
+
     // run the clock once for cache fill etc.
     auto start_time   = std::chrono::steady_clock::now();
     auto end_time     = std::chrono::steady_clock::now();
@@ -68,10 +86,7 @@ int main(int argc, char** argv) {
     LOG_F(INFO, "Time elapsed (dry run): %lld ns", time_elapsed.count());
 
     for (i = 0; i < 5; i++) {
-        ppc_state.pc = 0;
-        ppc_state.gpr[3] = 0x1000; // buf
-        ppc_state.gpr[4] = 0x8000; // len
-        ppc_state.gpr[5] = 0;      // sum
+        setup_regs();
 
         auto start_time = std::chrono::steady_clock::now();
 
@@ -85,6 +100,23 @@ int main(int argc, char** argv) {
         LOG_F(INFO, "Time elapsed (run #%d): %lld ns", i, time_elapsed.count());
     }
 
+    LOG_F(INFO, "\nBenchmarking the NuInterpreter:");
+
+    for (i = 0; i < 5; i++) {
+        setup_regs();
+
+        auto start_time = std::chrono::steady_clock::now();
+
+        NuInterpExec(0);
+
+        auto end_time = std::chrono::steady_clock::now();
+
+        LOG_F(INFO, "Checksum: 0x%08X", ppc_state.gpr[3]);
+
+        auto time_elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time);
+        LOG_F(INFO, "Time elapsed (run #%d): %lld ns", i, time_elapsed.count());
+    }
+
     delete(grackle_obj);
 
     return 0;