From 49233e234e5c787396cadb2cea33b31ae0cd65c1 Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@nokia.com>
Date: Wed, 20 Jun 2012 13:01:08 +0200
Subject: Imported WebKit commit 3a8c29f35d00659d2ce7a0ccdfa8304f14e82327
 (http://svn.webkit.org/repository/webkit/trunk@120813)

New snapshot with Windows build fixes
---
 Source/JavaScriptCore/runtime/Options.cpp | 42 ++++++++++++++++---------------
 1 file changed, 22 insertions(+), 20 deletions(-)

(limited to 'Source/JavaScriptCore/runtime/Options.cpp')

diff --git a/Source/JavaScriptCore/runtime/Options.cpp b/Source/JavaScriptCore/runtime/Options.cpp
index 8f5a05067..ec228f82a 100644
--- a/Source/JavaScriptCore/runtime/Options.cpp
+++ b/Source/JavaScriptCore/runtime/Options.cpp
@@ -47,6 +47,8 @@ namespace JSC { namespace Options {
 
 bool useJIT;
 
+bool showDisassembly;
+
 unsigned maximumOptimizationCandidateInstructionCount;
 
 unsigned maximumFunctionForCallInlineCandidateInstructionCount;
@@ -89,9 +91,6 @@ double doubleVoteRatioForDoubleFormat;
 
 unsigned minimumNumberOfScansBetweenRebalance;
 unsigned gcMarkStackSegmentSize;
-unsigned minimumNumberOfCellsToKeep;
-unsigned maximumNumberOfSharedSegments;
-unsigned sharedStackWakeupThreshold;
 unsigned numberOfGCMarkers;
 unsigned opaqueRootMergeThreshold;
 
@@ -145,10 +144,28 @@ void setHeuristic(T& variable, const char* name, U value)
 #define SET(variable, value) variable = value
 #endif
 
+static unsigned computeNumberOfGCMarkers(int maxNumberOfGCMarkers)
+{
+    int cpusToUse = 1;
+
+#if ENABLE(PARALLEL_GC)
+    cpusToUse = std::min(WTF::numberOfProcessorCores(), maxNumberOfGCMarkers);
+
+    // Be paranoid, it is the OS we're dealing with, after all.
+    ASSERT(cpusToUse >= 1);
+    if (cpusToUse < 1)
+        cpusToUse = 1;
+#endif
+
+    return cpusToUse;
+}
+
 void initializeOptions()
 {
     SET(useJIT, true);
     
+    SET(showDisassembly, false);
+    
     SET(maximumOptimizationCandidateInstructionCount, 10000);
     
     SET(maximumFunctionForCallInlineCandidateInstructionCount, 180);
@@ -188,25 +205,10 @@ void initializeOptions()
     
     SET(doubleVoteRatioForDoubleFormat, 2);
     
-    SET(minimumNumberOfScansBetweenRebalance, 10000);
+    SET(minimumNumberOfScansBetweenRebalance, 100);
     SET(gcMarkStackSegmentSize,               pageSize());
-    SET(minimumNumberOfCellsToKeep,           10);
-    SET(maximumNumberOfSharedSegments,        3);
-    SET(sharedStackWakeupThreshold,           1);
     SET(opaqueRootMergeThreshold,             1000);
-
-    int cpusToUse = 1;
-#if ENABLE(PARALLEL_GC)
-    cpusToUse = WTF::numberOfProcessorCores();
-#endif
-    // We don't scale so well beyond 4.
-    if (cpusToUse > 4)
-        cpusToUse = 4;
-    // Be paranoid, it is the OS we're dealing with, after all.
-    if (cpusToUse < 1)
-        cpusToUse = 1;
-    
-    SET(numberOfGCMarkers, cpusToUse);
+    SET(numberOfGCMarkers, computeNumberOfGCMarkers(7)); // We don't scale so well beyond 7.
 
     ASSERT(thresholdForOptimizeAfterLongWarmUp >= thresholdForOptimizeAfterWarmUp);
     ASSERT(thresholdForOptimizeAfterWarmUp >= thresholdForOptimizeSoon);
-- 
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