diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
index 57a14e8796..5798c89fff 100644
--- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
+++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
@@ -1111,14 +1111,13 @@ InsertFpdtRecord (
   case PERF_EVENTSIGNAL_END_ID:
   case PERF_CALLBACK_START_ID:
   case PERF_CALLBACK_END_ID:
-    if (String == NULL) {
+    if (String == NULL || Guid == NULL) {
       return EFI_INVALID_PARAMETER;
     }
-    //
-    // Cache the event guid in string event record when PcdEdkiiFpdtStringRecordEnableOnly == TRUE
-    //
-    CopyGuid (&ModuleGuid, Guid);
     StringPtr = String;
+    if (AsciiStrLen (String) == 0) {
+      StringPtr = "unknown name";
+    }
     if (!PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
       FpdtRecordPtr.DualGuidStringEvent->Header.Type      = FPDT_DUAL_GUID_STRING_EVENT_TYPE;
       FpdtRecordPtr.DualGuidStringEvent->Header.Length    = sizeof (FPDT_DUAL_GUID_STRING_EVENT_RECORD);
@@ -1196,7 +1195,14 @@ InsertFpdtRecord (
     FpdtRecordPtr.DynamicStringEvent->Header.Revision   = FPDT_RECORD_REVISION_1;
     FpdtRecordPtr.DynamicStringEvent->ProgressID        = PerfId;
     FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
-    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    if (Guid != NULL) {
+      //
+      // Cache the event guid in string event record.
+      //
+      CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, Guid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    } else {
+      CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    }
     if (AsciiStrLen (StringPtr) == 0) {
       StringPtr = "unknown name";
     }
diff --git a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
index 8a65a2a747..808a63501e 100644
--- a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
+++ b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
@@ -77,10 +77,10 @@ GetFpdtRecordPtr (
     //
     PeiFirmwarePerformance  = (UINT8*)GET_GUID_HOB_DATA (GuidHob);
     *PeiPerformanceLogHeader = (FPDT_PEI_EXT_PERF_HEADER *)PeiFirmwarePerformance;
-    if (!(*PeiPerformanceLogHeader)->HobIsFull && (*PeiPerformanceLogHeader)->SizeOfAllEntries + RecordSize > (UINTN)(PeiPerformanceLogEntries * PEI_MAX_RECORD_SIZE)) {
+    if (!(*PeiPerformanceLogHeader)->HobIsFull && (*PeiPerformanceLogHeader)->SizeOfAllEntries + RecordSize > (PeiPerformanceLogEntries * PEI_MAX_RECORD_SIZE)) {
       (*PeiPerformanceLogHeader)->HobIsFull = TRUE;
     }
-    if (!(*PeiPerformanceLogHeader)->HobIsFull && (*PeiPerformanceLogHeader)->SizeOfAllEntries + RecordSize <= (UINTN)(PeiPerformanceLogEntries * PEI_MAX_RECORD_SIZE)) {
+    if (!(*PeiPerformanceLogHeader)->HobIsFull && (*PeiPerformanceLogHeader)->SizeOfAllEntries + RecordSize <= (PeiPerformanceLogEntries * PEI_MAX_RECORD_SIZE)) {
       FpdtRecordPtr->RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(PeiFirmwarePerformance + sizeof (FPDT_PEI_EXT_PERF_HEADER) + (*PeiPerformanceLogHeader)->SizeOfAllEntries);
       break;
     }
@@ -423,9 +423,11 @@ InsertFpdtRecord (
   case PERF_EVENTSIGNAL_END_ID:
   case PERF_CALLBACK_START_ID:
   case PERF_CALLBACK_END_ID:
-    if (String != NULL && AsciiStrLen (String) != 0) {
-      StringPtr = String;
-    } else {
+    if (String == NULL || Guid == NULL) {
+      return EFI_INVALID_PARAMETER;
+    }
+    StringPtr = String;
+    if (AsciiStrLen (String) == 0) {
       StringPtr = "unknown name";
     }
     if (!PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
@@ -436,6 +438,7 @@ InsertFpdtRecord (
       FpdtRecordPtr.DualGuidStringEvent->Timestamp        = TimeStamp;
       CopyMem (&FpdtRecordPtr.DualGuidStringEvent->Guid1, ModuleGuid, sizeof (FpdtRecordPtr.DualGuidStringEvent->Guid1));
       CopyMem (&FpdtRecordPtr.DualGuidStringEvent->Guid2, Guid, sizeof (FpdtRecordPtr.DualGuidStringEvent->Guid2));
+      CopyStringIntoPerfRecordAndUpdateLength (FpdtRecordPtr.DualGuidStringEvent->String, StringPtr, &FpdtRecordPtr.DualGuidStringEvent->Header.Length);
     }
     break;
 
diff --git a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c
index 0c00fb51e8..f18c3fb60d 100644
--- a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c
+++ b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c
@@ -649,14 +649,13 @@ InsertFpdtRecord (
   case PERF_EVENTSIGNAL_END_ID:
   case PERF_CALLBACK_START_ID:
   case PERF_CALLBACK_END_ID:
-    if (String == NULL) {
+    if (String == NULL || Guid == NULL) {
       return EFI_INVALID_PARAMETER;
     }
-    //
-    // Cache the event guid in string event record when PcdEdkiiFpdtStringRecordEnableOnly == TRUE
-    //
-    CopyGuid (&ModuleGuid, Guid);
     StringPtr = String;
+    if (AsciiStrLen (String) == 0) {
+      StringPtr = "unknown name";
+    }
     if (!PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
       FpdtRecordPtr.DualGuidStringEvent->Header.Type      = FPDT_DUAL_GUID_STRING_EVENT_TYPE;
       FpdtRecordPtr.DualGuidStringEvent->Header.Length    = sizeof (FPDT_DUAL_GUID_STRING_EVENT_RECORD);
@@ -734,7 +733,14 @@ InsertFpdtRecord (
     FpdtRecordPtr.DynamicStringEvent->Header.Revision   = FPDT_RECORD_REVISION_1;
     FpdtRecordPtr.DynamicStringEvent->ProgressID        = PerfId;
     FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
-    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    if (Guid != NULL) {
+      //
+      // Cache the event guid in string event record.
+      //
+      CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, Guid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    } else {
+      CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+    }
     if (AsciiStrLen (StringPtr) == 0) {
       StringPtr = "unknown name";
     }