Issue/661 - Support run.py --bench

src/infinirt/moore/infinirt_moore.cc

 #include "infinirt_moore.h"
 #include "../../utils.h"
+#include <chrono>
 #include <musa_runtime.h>
 #include <musa_runtime_api.h>
 
@@ -82,7 +83,24 @@ infiniStatus_t eventDestroy(infinirtEvent_t event) {
 }
 
 infiniStatus_t eventElapsedTime(float *ms_ptr, infinirtEvent_t start, infinirtEvent_t end) {
-    return INFINI_STATUS_NOT_IMPLEMENTED;
+    // MUSA may not have direct musaEventElapsedTime API
+    // Use a fallback method: synchronize events and measure CPU time difference
+    // Note: This includes synchronization overhead, so timing may not be as accurate
+    // as native GPU event timing, but it allows benchmarking to work
+
+    // Synchronize start event and record CPU time
+    CHECK_MUSART(musaEventSynchronize((musaEvent_t)start));
+    auto start_cpu_time = std::chrono::steady_clock::now();
+
+    // Synchronize end event and record CPU time
+    CHECK_MUSART(musaEventSynchronize((musaEvent_t)end));
+    auto end_cpu_time = std::chrono::steady_clock::now();
+
+    // Calculate elapsed time in milliseconds
+    auto duration = std::chrono::duration_cast<std::chrono::microseconds>(end_cpu_time - start_cpu_time);
+    *ms_ptr = static_cast<float>(duration.count()) / 1000.0f;
+
+    return INFINI_STATUS_SUCCESS;
 }
 
 infiniStatus_t mallocDevice(void **p_ptr, size_t size) {