2009-05-12 Gavin Barraclough <barraclough@apple.com>
Reviewed by Maciej Stachowiak.
We've run into some problems where changing the size of the class JIT leads to
performance fluctuations. Try forcing alignment in an attempt to stabalize this.
* jit/JIT.h:
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@43599 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/JavaScriptCore/ChangeLog b/JavaScriptCore/ChangeLog
index 7d42876..02b0935 100644
--- a/JavaScriptCore/ChangeLog
+++ b/JavaScriptCore/ChangeLog
@@ -1,3 +1,12 @@
+2009-05-12 Gavin Barraclough <barraclough@apple.com>
+
+ Reviewed by Maciej Stachowiak.
+
+ We've run into some problems where changing the size of the class JIT leads to
+ performance fluctuations. Try forcing alignment in an attempt to stabalize this.
+
+ * jit/JIT.h:
+
2009-05-12 Kevin Ollivier <kevino@theolliviers.com>
wx build fix. Add ParserArena.cpp to the build.
diff --git a/JavaScriptCore/jit/JIT.h b/JavaScriptCore/jit/JIT.h
index d0227db..ca03cda 100644
--- a/JavaScriptCore/jit/JIT.h
+++ b/JavaScriptCore/jit/JIT.h
@@ -32,6 +32,14 @@
#define WTF_USE_CTI_REPATCH_PIC 1
+// We've run into some problems where changing the size of the class JIT leads to
+// performance fluctuations. Try forcing alignment in an attempt to stabalize this.
+#if COMPILER(GCC)
+#define JIT_CLASS_ALIGNMENT __attribute__ ((aligned (32)))
+#else
+#define JIT_CLASS_ALIGNMENT
+#endif
+
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JITCode.h"
@@ -646,7 +654,7 @@
unsigned m_propertyAccessInstructionIndex;
unsigned m_globalResolveInfoIndex;
unsigned m_callLinkInfoIndex;
- };
+ } JIT_CLASS_ALIGNMENT;
}
