X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdeModulePkg%2FLibrary%2FPeiPerformanceLib%2FPeiPerformanceLib.c;h=97dfd0d817d250fd70b19162e60558e8530c9f3f;hp=64b488369a43100e31f7f3a44fd0d6bc7856afa2;hb=857dfc455d7999f61c9b55f0a930c6b4087804b9;hpb=e05e2b73fc9e7b6662e0f8681b3e3ac2194662c7

diff --git a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
index 64b488369a..97dfd0d817 100644
--- a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
+++ b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
@@ -1,5 +1,10 @@
 /** @file
-  Performance Library
+  Performance library instance used in PEI phase.
+
+  This file implements all APIs in Performance Library class in MdePkg. It creates
+  performance logging GUIDed HOB on the first performance logging and then logs the
+  performance data to the GUIDed HOB. Due to the limitation of temporary RAM, the maximum
+  number of performance logging entry is specified by PcdMaxPeiPerformanceLogEntries.  
 
 Copyright (c) 2006 - 2008, Intel Corporation. <BR>
 All rights reserved. This program and the accompanying materials