Add Profiling support for Variable store and added a specialized caching algorithm

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4015 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Variable/Application/VariableInfo.c

@@ -0,0 +1,90 @@
+/** @file
+  If the Variable services have PcdVariableCollectStatistics set to TRUE then 
+  the EFI system table will contain statistical information about variable usage
+  an this utility will print out the information. You can use console redirection
+  to capture the data.
+  
+  Copyright (c) 2006 - 2007, Intel Corporation                                                         
+  All rights reserved. This program and the accompanying materials                          
+  are licensed and made available under the terms and conditions of the BSD License         
+  which accompanies this distribution.  The full text of the license may be found at        
+  http://opensource.org/licenses/bsd-license.php                                            
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+**/
+
+#include <Uefi.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiApplicationEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Guid/VariableInfo.h>
+
+
+/**
+  The user Entry Point for Application. The user code starts with this function
+  as the real entry point for the image goes into a library that calls this 
+  function.
+
+
+  @param[in] ImageHandle    The firmware allocated handle for the EFI image.  
+  @param[in] SystemTable    A pointer to the EFI System Table.
+  
+  @retval EFI_SUCCESS       The entry point is executed successfully.
+  @retval other             Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+UefiMain (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS            Status;
+  VARIABLE_INFO_ENTRY   *VariableInfo;
+  VARIABLE_INFO_ENTRY   *Entry;
+
+  Status = EfiGetSystemConfigurationTable (&gEfiVariableInfoGuid, (VOID **)&Entry);
+  if (!EFI_ERROR (Status) && (Entry != NULL)) {
+    Print (L"Non-Volatile EFI Variables:\n");
+    VariableInfo = Entry;
+    do {
+      if (!VariableInfo->Volatile) {
+        Print (
+          L"%g R%03d(%03d) W%03d D%03d:%s\n", 
+          &VariableInfo->VendorGuid,  
+          VariableInfo->ReadCount,
+          VariableInfo->CacheCount,
+          VariableInfo->WriteCount,
+          VariableInfo->DeleteCount,
+          VariableInfo->Name
+          );
+      }
+
+      VariableInfo = VariableInfo->Next;
+    } while (VariableInfo != NULL);
+
+    Print (L"Volatile EFI Variables:\n");
+    VariableInfo = Entry;
+    do {
+      if (VariableInfo->Volatile) {
+        Print (
+          L"%g R%03d(%03d) W%03d D%03d:%s\n", 
+          &VariableInfo->VendorGuid,  
+          VariableInfo->ReadCount,
+          VariableInfo->CacheCount,
+          VariableInfo->WriteCount,
+          VariableInfo->DeleteCount,
+          VariableInfo->Name
+          );
+      }
+      VariableInfo = VariableInfo->Next;
+    } while (VariableInfo != NULL);
+
+  }
+
+  return EFI_SUCCESS;
+}

MdeModulePkg/Universal/Variable/Application/VariableInfo.inf

@@ -0,0 +1,50 @@
+#/** @file
+# Sample UEFI Application Reference Module
+#
+# This is a shell application that will display Hello World.
+# Copyright (c) 2007, Intel Corporation.
+#
+#  All rights reserved. This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = VariableInfo
+  FILE_GUID                      = 202A2922-8C27-4943-9855-26180BF9F113
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  EDK_RELEASE_VERSION            = 0x00020000
+  EFI_SPECIFICATION_VERSION      = 0x00020000
+
+  ENTRY_POINT                    = UefiMain
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources.common]
+  VariableInfo.c
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+
+[LibraryClasses]
+  UefiBootServicesTableLib
+  UefiApplicationEntryPoint
+  UefiLib
+  DebugLib
+
+[Guids]
+  gEfiVariableInfoGuid