diff --git a/DRAMSys/simulator/resources/configs/mcconfigs/sms.xml b/DRAMSys/simulator/resources/configs/mcconfigs/sms.xml
index 19490a2c..84551d57 100644
--- a/DRAMSys/simulator/resources/configs/mcconfigs/sms.xml
+++ b/DRAMSys/simulator/resources/configs/mcconfigs/sms.xml
@@ -14,4 +14,5 @@
     <ErrorCSVFile value="../../DRAMSys/simulator/src/error/error.csv" />
     <!-- Modes: NoStorage, Store (store data without errormodel), ErrorModel (store data with errormodel) -->
     <StoreMode value="NoStorage" />
+    <ControllerCoreDisableRefresh value="0"/>
 </mcconfig>
\ No newline at end of file
diff --git a/DRAMSys/simulator/src/controller/scheduler/SMS.cpp b/DRAMSys/simulator/src/controller/scheduler/SMS.cpp
index aab6706e..24022e1c 100644
--- a/DRAMSys/simulator/src/controller/scheduler/SMS.cpp
+++ b/DRAMSys/simulator/src/controller/scheduler/SMS.cpp
@@ -6,6 +6,7 @@ using namespace std;
 void SMS::schedule(gp *payload)
 {
   Thread thread = DramExtension::getExtension(payload).getThread();
+  bool wasEmpty = isRequestBuffersEmpty();
 
   requestBuffers[thread].emplace_back(payload);
 
@@ -16,7 +17,9 @@ void SMS::schedule(gp *payload)
   inFlightMemRequestCounter[thread]++;
   cacheMisses[thread]++;
 
-  newRequest.notify(SC_ZERO_TIME);
+  if (wasEmpty) {
+    newRequest.notify(SC_ZERO_TIME);
+  }
 }
 
 std::pair<Command, gp*> SMS::getNextRequest(Bank bank)
@@ -228,14 +231,16 @@ bool SMS::isThresholdAgeExceeded(Thread thread, sc_time memClk, std::deque<gp*>:
 void SMS::updateMPKCs(sc_time memClk) {
   if (sc_time_stamp() % (MPKC_RESET_CYCLE * memClk) <= memClk) {
     // reset for every 10k clk cycles
-    for (auto& mpkc : MPKCs) {
-        mpkc.second = 0;
+    for (auto& cacheMiss : cacheMisses) {
+        MPKCs[cacheMiss.first] = 0;
     }
+    debugManager.printDebugMessage(name(), "Reset MKKCs");
   } else {
     // update MPKC for every thread
-    for (auto& mpkc : MPKCs) {
-        mpkc.second = (cacheMisses[mpkc.first] * 1000.0 * memClk) / (sc_time_stamp());
+    for (auto& cacheMiss : cacheMisses) {
+      MPKCs[cacheMiss.first] = (cacheMiss.second * 1000.0 * memClk) / (sc_time_stamp());
     }
+    debugManager.printDebugMessage(name(), "Update MPKCs");
   }
 }
 
@@ -245,11 +250,12 @@ bool SMS::isExceededReqBufferSize(Thread thread) {
 
 void SMS::batchFormation(sc_time memClk) {
   for (auto& requestBuffer : requestBuffers) {
-    if (!requestBuffer.second.empty() && !readybatches[requestBuffer.first].empty()) {
+    if (!requestBuffer.second.empty() && readybatches[requestBuffer.first].empty()) {
       if (MPKCs[requestBuffer.first] < LOW_MPKC || isSystemLightlyLoaded()) {
         // bypass requests by forming batch with only one request (threshold age is ZERO)
         readybatches[requestBuffer.first].emplace_back(requestBuffer.second.front());
         requestBuffer.second.pop_front();
+        debugManager.printDebugMessage(name(), "Bypass requests by forming batch of thread " + to_string(requestBuffer.first.ID()));
       } else {
         // forming batch with FIFO size & threshold age constraints
         auto firstDifferentRowAccessReqIter = requestBuffer.second.begin();
@@ -265,6 +271,7 @@ void SMS::batchFormation(sc_time memClk) {
             readybatches[requestBuffer.first].emplace_back(requestBuffer.second.front());
             requestBuffer.second.pop_front();
           } while (requestBuffer.second.begin() != firstDifferentRowAccessReqIter);
+          debugManager.printDebugMessage(name(), "Deem batch ready - thread " + to_string(requestBuffer.first.ID()));
         }
       }
     }
@@ -282,7 +289,7 @@ bool SMS::isRequestBuffersEmpty() {
 
 bool SMS::existReadyBatches() {
   for (auto& readybatch : readybatches) {
-    if (readybatch.second.empty()) {
+    if (!readybatch.second.empty()) {
       return true;
     }
   }